KR101845457B1 - Waste water treatment system - Google Patents

Abstract

A waste water treatment system of the present invention comprises: an oil separation device consisting of a storage tank, an oil chamber, a skimmer, an inclined plate, a warming unit, an adjusting part, and a filter part; an anaerobic digestion tank connected to a discharge line of the oil separation device and having a gas collecting part for collecting biogas generated by internal anaerobic digestion; and a heating unit for allowing the gas collected in the gas collecting part to be introduced through a reuse line and to be used as a raw material and supplying generated heat to the warming unit.

Description

[0001] Waste water treatment system [0002]

The present invention relates to a treatment system for facilitating the collection of biogas as a result of anaerobic digestion by allowing anaerobic digestion to be performed by introducing treated water treated with oil from an oil separation apparatus.

In general, the food waste liquid refers to a high concentration of organic waste liquid discharged from the recycling process of the residual food waste. The food desalination solution contains organic matter that is high in water content and easily decayed, and is a wastewater having a high solids content. Such food waste is prohibited from direct landfilling, and local landfilling of food waste is prohibited by local governments. At present, the desalted liquid of water is processed at a water content of less than 92% and is transported to the sewage treatment plant, and the marine dumping is expected to be totally prohibited from 2013 by the London Convention. In the sewage treatment plant, And there is concern about the incidence of complaints due to odor. In recent years, attempts have been made to minimize the organic matter content before entering the sewage treatment plant, for example, by producing biogas using anaerobic digestion process without throwing away tapiocaemia solution or bringing it into the sewage treatment plant.

Korean Patent Registration No. 939070 discloses a method for producing an acid fermentation broth for using organic wastewater as an acidic fermentation broth for a methane fermentation facility and a carbon source for treating wastewater, as a technology for treating such a desalination liquid, ), Flocculants are injected into the organic wastewater fed into the flocculation and mixing tank in order to remove the solid matter and the oil contained in the organic wastewater, such as manure and livestock manure, sludge digestion liquid and desalination liquid, The organic wastewater is introduced into the atmospheric pressure flotation tank and the minute bubbles of the ionized double membrane produced in the micro bubble generator are injected to bring the flocs and micro bubbles into contact with each other to float solids and oil by the buoyancy of the micro bubbles, Including an atmospheric pressure flotation separation process, And a method for producing an acidic fermentation broth of a cast wastewater.

However, in the case of this technology, although the oil is removed by the atmospheric pressure floating tank using micro-bubbles, the oil is strongly mixed with other organic materials and viscous, so that it is not enough to remove the oil by the microbubbles only. There is a problem that even if the waste liquid is anaerobically digested, the biogas can not be sufficiently generated and the device can be broken down.

Korean Patent No. 939070

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a wastewater treatment system in which the efficiency of removing oil is improved to facilitate the anaerobic digestion process.

As a means for solving the above-mentioned problems, the waste water treatment system of the present invention is a waste water treatment system of the present invention, in which an inflow line through which food waste liquid flows is formed at one side, a discharge line through which a process liquid is discharged at the lower end of the other side, A storage tank in which an oil discharge line is formed; An oil chamber communicating with the oil discharge line inside the storage tank and having an upper portion opened; A skimmer formed at an upper portion of the storage tank to allow oil to flow into the oil chamber; A slope plate protruding from a lower surface of the storage tank and having an upward slope at a position spaced apart from the inflow line; Heating means for warming the food stripping liquid introduced through the inflow line into the heating space formed by the side plate of the swash plate and the storage tank; A rotating plate formed at a position spaced apart from the swash plate and rotatably interlocked with the rotating shaft is formed at the upper end of the rotating plate and a depressing plate protruding to separate and deposit the separated oil is formed at the upper end of the rotating plate, A regulating unit that forms a vortex by contacting the upper end of the swash plate by the rotation of the swash plate in accordance with the magnitude of the pressurization by the oil impregnated on the deposit plate, And a filter unit for filtering and discharging the treatment liquid to the discharge line. An anaerobic digestion tank connected to a discharge line of the oil separation apparatus and having a gas collecting portion for collecting biogas generated by internal anaerobic digestion; And heating means for allowing the gas collected in the gas collecting portion to flow through the reuse line to be used as a raw material and to supply the generated heat to the heating means.

The heating means may be a heat line formed in the swash plate, or a heat exchange pipe formed in the lower portion of the heating space.

The induction plate may have a shape in which a mountain and a bone are alternately formed. The induction plate may have a shape in which a mountain and a bone are alternately formed .

More preferably, it is appropriate that an exhaust passage is formed in the acid of the induction plate.

As another example, in the swash plate, a plurality of plate-shaped body portions forming an inclined gradient are connected by a connecting rod, and each of the body portions has a different height, so that an inflow passage can be formed downward between adjacent body portions.

Also, the filter unit may include a raw milk inlet having a spiral guide formed on the inner surface of the tube whose upper end is blocked, and a perforation formed through the spiral guide at an upper portion thereof; A plurality of hollow fiber membrane units formed of hollow fiber membranes having a predetermined length are fixed by a pair of upper and lower binding members to surround the raw milk feed inlet; A housing having a hollow cylindrical shell having upper and lower ends penetrated while receiving the hollow fiber membrane assembly and having a concentrated water outlet for discharging contaminants by washing; And an upper / lower header formed at a lower side thereof with raw water inlets for supplying raw water through the raw milk inlet, respectively, the upper and lower ends being connected to upper and lower ends of the housing, respectively, .

In addition, at least one vibration bar is formed, one end of which is fixed to the lower header and the other end is exposed through the hollow fiber membrane assembly.

In addition, the raw milk-feeding inlet includes: a lower tube having a perforation formed through a spiral guide at an upper portion thereof while a helical guide is formed; An upper tube communicating with the lower tube by an on-off valve and having a plurality of discharge holes formed at a rim of an upper surface thereof; A rotating shaft projecting from a central portion of the upper tube; A rotation driving part coupled to the rotation shaft at a top of the rotation shaft and formed of a frame ring for connecting a plurality of rotation blades to a plurality of rotation blade ends at a position opposite to the discharge hole; And a plurality of striking ends protruding from the rotation driving unit and striking the vibration bar in accordance with rotation of the rotation driving unit.

As another example, a pressure sensor module including a plurality of pressure sensors is provided on a side surface of the housing to detect whether the hollow fiber membrane unit is blocked or broken by a pressure difference between the pressure sensors.

In addition, when the sensed value of the pressure sensor having the highest pressure value in the pressure sensor module exceeds the breakage reference value, the control unit interrupts the inflow of raw water into the raw milk inlet to stop the water treatment process, And when the sensing value of the lowest pressure sensor is less than the closing reference value, only the concentrated water outlet is opened to perform the cleaning process.

As described above, the wastewater treatment system of the present invention has an advantage of improving the oil removal efficiency and facilitating the anaerobic digestion process at the downstream end.

1 is a block diagram illustrating a system of the present invention,
FIG. 2 is a schematic view showing an example of heating means in the oil separation apparatus, which is a constitution of the present invention,
3 is a schematic view showing another example according to heating means in an oil separation apparatus which is a constitution of the present invention,
Fig. 4 is a front view showing an example according to the installation structure of the hot wire on the swash plate in the example shown in Fig. 2,
5 is a front view showing an example of a structure of a swash plate as a constituent of the oil separator,
6 is a side cross-sectional view showing another example according to the structure of the swash plate as an integral part of the oil separator,
Fig. 7 is a schematic view showing an example in which the air diving apparatus is further added in the example shown in Fig. 2,
8A and 8B are operational state diagrams showing the operating state of the regulating portion,
9 is a cross-sectional view showing a basic example of the filter unit,
10A and 10B are schematic diagrams showing the operating relationship of the basic example shown in FIG. 9,
11 is a cross-sectional view showing an embodiment of the filter portion,
FIG. 12 is a detailed view of a portion A in FIG. 11,
13 is a cross-sectional view showing another embodiment of the filter portion,
FIG. 14 is a schematic view showing the anaerobic digestion tank of FIG. 1,
15 is a side cross-sectional view showing a floating stirrer which is one configuration of Fig. 14,
16 is a schematic view showing an embodiment of an impeller in the floating stirrer shown in Fig.

Hereinafter, the structure and operation of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, terms and words used in the present specification and claims are to be construed in accordance with the principles of the present invention, on the basis that the inventor can properly define the concept of a term in order to best explain his invention It should be construed as meaning and concept consistent with the technical idea of.

1, the waste water treatment system 1 of the present invention comprises an oil separation apparatus 100; An anaerobic digester 200 connected to the discharge line 112 of the oil separator 100 and having a gas collecting part for collecting biogas generated by internal anaerobic digestion; A heating means 400 for allowing the gas collected in the gas collecting portion to flow through the reuse line (1) to be used as a raw material and to supply the generated heat to the heating means (150) through a supply line (2) And a control unit.

In addition, in the oil separator 100, it is appropriate that the oil storage line 300 is further formed in the oil discharge line 113 so that the oil stored in the oil storage tank 300 is processed separately.

First, the oil separator 100 will be described.

2 and 3, the oil separator 100 includes a storage tank 110, a oil chamber 120, a skimmer 130, a swash plate 140, a heating unit 150, a regulating unit 180, And the filter unit 190 so as to discharge the treated water from which the oil is removed by the swash plate 140, the heating unit 150 and the regulating unit 180 from the negative wastewater (food waste liquid).

The storage tank 110 is provided with an inflow line 111 through which food waste liquid flows into one side and a discharge line 112 through which the treatment liquid is discharged at the lower end of the other side and an oil discharge line (113) is formed. The material of the storage tank 110 is not limited.

The oil chamber 120 communicates with the oil discharge line 113 inside the storage tank 110 and is opened at an upper portion of the oil chamber 120. The oil chamber 120 is connected to the oil discharge line 113 by the skimmer 130, And then discharges the oil to the outside through the oil discharge line 113. [0064]

The skimmer 130 is formed on the upper portion of the storage tank 110, which is a known technology, and a description thereof will be omitted.

Particularly, in the oil separator 100 of the present invention, since the swash plate 140 and the heating means 150 are constructed, the wastewater flowing into the storage tank 110 through the inflow line 111 rides on the swash plate 140 The reason why the inclined plate 140 is formed to form an inclined slope is to make the vortex formed while forming the upward flow so that the oil mixed with the negative wastewater is separated from other organic substances or the like, By expanding the area, it is aimed to induce lump of separated oil to increase oil removal efficiency. In addition, in addition to this, the negative wastewater introduced by the warming means 150 is warmed to lower the viscosity of the wastewater, thereby separating the oil fractions.

2 and 3 illustrate a basic example of the swash plate 140. The swash plate 140 is formed in a plate shape and protrudes from the lower surface of the storage tank 110. The swash plate 140 is upwardly spaced from the inflow line 111, So that the heating space 160 is formed by the side surface of the storage tank 110 and the swash plate 140. The material of the swash plate 140 is preferably made of a material capable of conducting heat well by the heat generated by the heating means 150.

The heating means 150 presents two embodiments in Figs. 2 and 3. Fig.

2 shows an example in which the heating wire 150a is installed on the front surface of the swash plate 140, that is, the surface of the swash plate 140, which is in contact with the heating space 160. However, But the present invention is not limited thereto and a structure in which it is embedded in the swash plate 140 is also conceivable. As the heating wire 150a is formed on the swash plate 140, the incoming negative wastewater is separated from the oil by the collision with the swash plate 140, and contacts the swash plate 140 by the upward flow, And directs the negative wastewater in contact with the swash plate 140 to directly heat the oil.

4 shows an example in which the hot wire 150a is formed on the front surface of the swash plate 140. The hot wire 150a is installed on the front surface of the swash plate 140 such that a plurality of stages are formed laterally And the respective stages are connected, and in particular, the stages 150a-2 and 150a-1 are alternated at each stage. FIG. 3 shows an example in which each end is formed in a wave shape, but it is not limited thereto, and it may be formed in a bent shape.

The reason why the heat line 150a is formed such that a plurality of stages are formed on the entire surface of the swash plate 140 and the mountains 150a-2 and the valleys 150a-1 are alternated at each stage, 140 is heated by the hot wire 150a and vortices are formed by the hot wire 150a to increase the efficiency of oil separation.

Particularly, in the waste water coming into contact with the heat line 150a, the oil fractions having a small specific gravity are gathered at the respective acid portions 150a-2, so that mutual aggregation occurs, thereby floating the aggregated oil fractions. At this time, the heat generated by the heat line 150a lowers the viscosity of the waste water, thereby increasing the efficiency of oil separation.

3, the heat exchanger 150b is formed as a heat exchanger pipe 150b formed at the lower end of the warm space 160. The heat exchanger 150b circulates the heat exchanger medium, The negative wastewater flowing into the space 160 is heated from the bottom to lower the viscosity.

The heat ray 150a and the heat exchange pipe 150b are connected to the heat generating means 400 outside the storage tank 110 to supply a heat source.

5 and 6 illustrate another example of the swash plate 140. As shown in FIG. In this case, though not shown in the drawings, the heating unit 150 may be configured such that the heating line 150a is embedded in the swash plate 140, or the heat exchange pipe 150b is installed in the heating space 160 .

The swash plate 140a shown in FIG. 5 includes a plate-shaped body 141 forming an inclined gradient and a plurality of guide plates 142 projecting from the body portion 141 in contact with the heating space 160 The guide plate 142 has a shape in which a mountain 142-2 and a valley 142-1 are alternately formed.

The reason for this construction is that the negative wastewater flowing into the warming space 160 has a large contact area at the swash plate 140a to induce separation and aggregation of oil by vortex formation or the like, The oil fraction having a small specific gravity separated due to the shape is guided to the mountain 142-2 portion to induce the aggregation.

More preferably, the discharge channel 142-3 is formed in the mountain 142-2 of the induction plate 142, and the coalesced oil is discharged to the upper part while being floated or the induction plate 142 positioned at the upper part performs the same operation So that the oil is gathered in a larger form.

6, the swash plate 140b shown in FIG. 6 includes a plurality of plate-shaped body portions 141 forming an inclined gradient, which are connected in parallel by a connecting rod 143, (141) are different in height so that the inflow channel (144) is formed downward between adjacent body parts. That is, a plurality of body portions 141 having different heights are arranged at the outermost side of the body portion 141 having the largest height, and the body portions 141 having different heights are arranged in parallel by using the connecting portion 143 And an inflow channel 144 is formed below the body portions 141 that are formed in the body.

5, the negative wastewater flowing into the warming space 160 flows through the inflow channel 144 to flow on the lower portion of the body portion 141, So that the contact area between the waste water and the waste water is maximized to induce separation and aggregation of the oil. Particularly, the oil separated from the negative wastewater flowing on the lower portion of the body portion 141 floats due to the specific gravity, and the floating oil flows on the body portion 141 'located at the upper portion, .

7 shows another example of the oil separation apparatus 100 according to the present invention. In this embodiment, the air dissolving apparatus 170 is connected to the inflow line 111 by a valve. That is, according to the present embodiment, the negative wastewater selectively flows through the air dissolution apparatus 170 to dissolve air in the waste water. The reason for this construction is that the organic matter is decomposed by the dissolution of the air, The temperature of the molten waste water is increased by the heating means 150 and the dissolved air is vaporized to form bubbles.

The reason for forming the bubble in this manner is that when the bubble is formed in the lower part by the air diffuser or the like, the efficiency of floating the oil in the entire heating space 160 may be reduced due to non-uniform bubble formation. The bubbles are formed in the entire heating space 160 by dissolving air in the wastewater and vaporizing the air by the temperature and the pressure. As the bubbles are uniformly formed in the entire heating space 160, The oil is separated by the collision or the like, and the separated oil is floated on the bubble.

7, the air dissolving line 173 is heated by the valve and the air dissolving line 173 is connected to the air dissolving tank 171 And an air supply unit 172 is connected to the air dissolving unit 171. In other words, air is injected from the air supply device 172 into the negative wastewater flowing into the air dissolving tank 171, but a plurality of partition walls are provided inside the air dissolving tank 171, So that the air can be dissolved in the waste water in the air dissolving tank 171.

The adjusting unit 180 is formed at a position spaced apart from the swash plate 140 and includes rotating plates 182 and 184 which are rotatably coupled to each other by a rotating shaft 181. Separated from the upper ends of the rotating plates 182 and 184, A depression plate 183 protruding so as to be deposited while the oil is floated is formed and a pressure sensor 185 is formed in the depression plate 183 to adjust the pressure of the oil deposited on the depression plate 183 The swash plate 182 and the swash plate 184 contact with the upper end of the swash plate 140 to form a vortex or to be spaced from the swash plate 140 to form a flow passage.

The rotating shaft 181 is spaced from the swash plate 140 and is formed in the storage tank 110 in parallel with the swash plate 140. The rotating shaft 181 is connected to the rotating shaft 181 by driving means such as a motor Thereby enabling interlocking.

The rotating plates 182 and 184 are configured such that the upper plate 182 and the lower plate 184 are rotatably coupled to each other by a rotating shaft 181. In the heating chamber 160, The wastewater w separated from the oil by forming the oil passage is formed so that the rotary plates 182 and 184 are spaced apart from the swash plate 140 when the oil is sufficiently separated from the swash plate 140, And flows through the flow path formed by the flow paths 182 and 184 while moving downward.

On the other hand, as shown in FIG. 8B, when the oil is not sufficiently separated due to the above-mentioned operating mechanism in the warming space 160, the rotating plates 182 and 184 are engaged with the upper end of the swash plate 140 . As shown in the drawing, the vortex is formed by the upper plate 182 and the residence time in the warming space 160 becomes longer as shown in the drawing. will be. By such an operating mechanism, the retention time of the negative wastewater in the warming space 160 is made long so that the oil is sufficiently separated from the negative wastewater.

The immersion plate 183 is protruded from the upper end of the rotation plates 182 and 184, that is, the upper end of the upper plate 182. Oil fractions separated from the negative wastewater and having a small specific gravity are immersed in the lower part of the immersion plate 183, . In particular, a pressure sensor 185 is provided inside the deposition plate 183 to sense the magnitude of the pressurization due to the oil impregnated in the deposition plate 183. When the sensed pressure exceeds a predetermined pressure, that is, As shown in FIG. 8A, when the oil is separated from the waste water and the oil is sufficiently deposited on the deposit plate 183 to generate a sensed value exceeding a predetermined pressure, the swash plate 140 and the And a flow path is formed between the rotary plates 182 and 184.

Also, as shown in FIG. 8B, when the sensed pressure is lower than a predetermined pressure, that is, when the oil is not sufficiently separated from the waste water, the oil is not sufficiently deposited on the deposit plate 183, The rotary plates 182 and 184 are rotated such that the upper end of the swash plate 140 and the rotary plates 182 and 184 are in contact with each other so that the wastewater flowing upward from the swash plate 140 is returned (160).

The weight 186 is formed under the lower plate 184 so that the weight 186 is not driven during the rotation of the rotary plates 182 and 184 in the state of FIGs 8B to 8A, .

As described above, the controller 180 adjusts the direction of the water flow so that the oil is sufficiently separated from the waste water in the warming space 160.

9, a spiral guide 42 is formed on the inner surface of the tube where the upper end is blocked, and a spiral guide 42 is formed on the upper part of the spiral guide 42, ); A plurality of hollow fiber membrane units (2) formed of hollow fiber membranes having a predetermined length are fixed by a pair of upper and lower binding members (32a, b), and a hollow fiber membrane assembly (3); A housing 5 formed on the outer circumferential surface at one side thereof with a concentrated water discharge port 52 for discharging pollutants by washing, the hollow fiber membrane assembly 3 being housed in a cylindrical shape having upper and lower ends penetrated therethrough; A process water outlet 62a for discharging process water is formed on the upper side of the housing and a raw water inlet 62b for supplying raw water to the raw milk inlet 4 on the lower side, And a lower header (6a, b).

First, the hollow fiber membrane unit 2 has a plurality of hollow fiber membranes, which are not shown in the figure but have a certain length in a state in which adhesive resin is filled in the upper and lower caps having one opening, And the hollow fiber membrane unit 2 is formed by curing.

It is preferable that the hollow fiber membrane unit 2 has an outer diameter of 0.5 to 8 mm and several to several tens of hollow fiber membranes. That is, when the outer diameter of the hollow fiber membrane is 0.5 mm or less, the density is increased. As a result, the vortex flow of the raw water discharged through the perforation 44, which will be described later, On the other hand, when the outer diameter of the hollow fiber membrane is 8 mm or more, the density of the hollow fiber membrane is lowered, thereby reducing the amount of water treatment to the raw water.

On the other hand, the number of the hollow fiber membranes constituting the hollow fiber membrane unit 2 is preferably about 5 to 30. That is, when the number of the hollow fiber membranes constituting the hollow fiber membrane unit 2 is 5 or less, the density of the hollow fiber membrane assemblies 3 is increased when the hollow fiber membrane assemblies 3 are reconstituted. As a result, The water treatment efficiency is lowered. On the other hand, when the number is more than 30, the density of the hollow fiber membrane assembly 3 is reduced when the hollow fiber membrane assembly 3 is reconstructed, thereby reducing the amount of water treatment.

In addition, the upper and lower ends of the hollow fiber membrane unit 2 are blocked by a cylindrical upper / lower cap filled with an adhesive resin. The diameter of the upper / lower caps is preferably about 1.2 to 20 mm. That is, when the diameter of the upper / lower cap is 1.2 mm or less, the density of the hollow fiber membrane assembly 3 is increased at the time of reconstitution of the hollow fiber membrane assembly 3, thereby making it impossible to secure space for the raw water to flow therethrough. When the hollow fiber membrane assembly 3 is 20 mm or more, the density of the hollow fiber membrane assembly 3 is reduced during the reconstruction, thereby reducing the amount of water treatment.

9, a plurality of the hollow fiber membrane units 2 are arranged on the upper and lower binding members 32a and 32b, and the upper and lower binding members 32a and 32b ), And then wrapping the raw milk feed tube 4 after bonding and fixing.

The hollow fiber membrane assembly 3 has a cylindrical shape that surrounds the raw milk feed tube 4. In other words, the hollow fiber membrane unit assembly 2 is rolled from one end of the hollow fiber membrane assembly 3 to connect the hollow fiber membrane unit assembly 3 to the center of the hollow fiber membrane unit assembly 3, and adjacent hollow fiber membrane unit bodies 2 are brought into contact with each other. In the raw milk feed pipe 4, the spiral guide 42 is formed on the inner surface of the pipe with the upper end cut off, and the perforation 44 is passed through the spiral guide 42 at a predetermined height.

Therefore, the raw water supplied to the raw milk inflow pipe 4 is vapored through the upper pore 44 while the speed is increased by the helical guide 42, and vapors are generated around the raw water. At this time, the vortex phenomenon causes the hollow fiber membrane unit 2 constituting the hollow fiber membrane assembly 3 to be knocked and the water treatment through the hollow fiber membrane unit 2 to be performed smoothly. Therefore, it is preferable that the diameter of the raw milk inflow pipe 4 is 15-30 mm.

At this time, when the diameter of the raw milk inflow inlet (4) is 15 mm or less, the pressure of the raw water is increased and the supply of the raw water can not be smoothly performed. In addition, in the course of fixing the hollow fiber membrane assembly (3) . On the contrary, when the diameter of the raw milk inflow pipe 4 is 30 mm or more, the pressure of the raw water to be inflow is small, so that the vortex phenomenon of the raw water is not only weakened but also the tightness to the top and bottom of the hollow fiber membrane assembly 3, . On the other hand, the perforation 44 of the raw milk inflow inlet 4 is preferably formed between the upper 1/3 and 2/3 of the height.

At this time, if the height of the perforation 44 is formed at a position above 1/3 of the upper side, the inflow water is not dispersed smoothly, so that the surface contaminants of the hollow fiber membrane unit and the hollow fiber membrane unit 2 of the hollow fiber membrane assembly 3 are effectively It can not be removed.

On the contrary, if the pressure is formed from 2/3 or less of the upper side, the inflow pressure of the raw water is small and the vortex phenomenon is reduced. In other words, the perforations 44 are formed on the upper 1/3 to 2/3 of the raw milk inflow inlet 4, so that a smooth vortex phenomenon is achieved at a high inflow pressure of the raw water. According to this configuration, the spiral guide 42 accelerates the flow rate of the raw water to be introduced and generates vortex as sprinkled with the raw water discharged through the perforations 44, so that the hollow fiber membrane assembly 3, which constitutes the hollow fiber membrane assembly 3, The unit body 2 is vibrated. By this action, the contaminants attached to the surface of the hollow fiber membrane unit 2 are removed, and the water treatment is smoothly performed through the hollow fiber membrane unit 2 from which the contaminants are removed.

The present invention also includes a housing 5 for covering a hollow fiber membrane module (raw milk feed pipe 4 and hollow fiber membrane assembly 3) and an upper / lower header 6a , 6b.

The housing 5 is formed into a cylindrical shape having upper and lower ends penetrated to cover and cover the hollow fiber membrane module, and at one side thereof, a concentrated water outlet 52 is formed to discharge contaminants generated from raw water . That is, the housing 5 covers the outer surface of the hollow fiber membrane module, and at the lower end of the hollow fiber membrane module, a concentrated water outlet 52 for discharging contaminants and enriched inflow water separated from the hollow fiber membrane assembly 3 during washing .

At this time, a valve is formed in the concentrated water discharge port 52 and is continuously opened to the extent that the pressure loss of the inflow water is minimized, thereby continuously discharging pollutants and concentrated inflow water filtered by the hollow fiber membrane assembly 3, Thereby preventing accumulation. That is, the concentrated water outlet 52 is opened so that the pressure loss of the raw water flowing through the raw milk feed pipe 4 is minimized, so that the contaminated water flowing into the raw milk feed pipe 4 flows through each hollow fiber membrane unit 2 At the same time as the water treatment is performed, contaminants or the like are continuously discharged through the concentrated water outlet 52.

The upper and lower inner peripheral surfaces of the housing 5 and the upper and lower outer peripheral surfaces of the hollow fiber membrane module and the upper and lower ends of the upper and lower ends of the housing 5 are formed in the upper and lower inner circumferential surfaces of the housing 5, Rings 54 are attached to the ends of the hollow fiber membranes 6a and 6b to prevent the loss of the treated water through the hollow fiber membrane assembly 3. In addition, On the upper / lower outer circumferential surfaces, threads for coupling the upper / lower headers 6a and 6b are formed.

The upper and lower headers 6a and 6b are respectively connected to the upper and lower outer circumferential surfaces of the housing 5 as a funnel shape. In the center of the upper header 6a, the treated water purified by the hollow fiber membrane module is moved upward And a raw water inlet 62b for supplying raw water to the raw milk inlet 4 of the hollow fiber membrane module is formed at the center of the lower header 6b. At this time, the treated water outlet 62a and the raw water inlet 62b are respectively provided with valves to selectively control, shut off or open.

Accordingly, when the raw water is supplied through the raw water inlet 62b and the water is treated using the raw water, the treated water outlet 62a is opened to perform a smooth water treatment, and the raw water is supplied through the raw water inlet 62b, While the treated water outlet 62a is blocked and the concentrated water outlet 52 is opened to smoothly discharge contaminants.

First, the function of water treatment using raw water will be more specifically described. The concentrated water outlet 52 is tightened or cut off, and the treated water outlet 62a is opened. Then, the raw water is supplied through the raw water inlet 62b of the lower header 6b and flows into the raw milk feed inlet 4 of the hollow fiber membrane module. At this time, since the inflowing raw water rotates along the helical guide 42, the speed is increased and discharged at a high speed through the perforation 44. The raw water thus discharged is purified through the hollow fiber membrane unit 2 constituting the hollow fiber membrane assembly 3 and discharged to the open upper side and then discharged smoothly through the treated water outlet 62a of the upper header 6a .

On the other hand, if the cleaning process using raw water is more specifically described, the concentrated water discharge port 52 is opened and the treated water discharge port 62a is shut off. Then, the raw water is supplied through the raw water inlet 62b of the lower header 6b and flows into the raw milk feed inlet 4 of the hollow fiber membrane module. At this time, the inflowing raw water is spiral guide 42, and thus the raw water to be discharged quickly basically vibrates while hitting the hollow fiber membrane unit 2 constituting the hollow fiber membrane assembly 3 to generate contaminants attached to the surface thereof And is discharged smoothly through the concentrated water outlet (52).

That is, the raw water discharged through the perforations 44 is prevented from adhering foreign matter to the surface by striking the hollow fiber membrane unit 2 constituting the hollow fiber membrane assembly 3 during water treatment, Is discharged to the concentrated water discharge port (52) during the washing, so that clean cleaning is performed.

In addition, the efficiency of the water treatment can be improved by preventing the adhesion of contaminants to the surface of the hollow fiber membrane unit 2 (hollow fiber membrane) constituting the hollow fiber membrane assembly 3.

11 and 12 show an embodiment of the filter unit 190. In this embodiment, one end is fixed to the lower header 6b and the other end is exposed through the hollow fiber membrane assembly 3, (55).

The vibrating bar 55 is made of elastic material so that only one end thereof is fixed. When the vortex is generated in the water treatment process and the washing process as described above, the vibration bar 55 is applied with vibration, So that the hollow fiber membrane unit 2 constituting the hollow fiber membrane assembly 3 is also subjected to vibration so that the foreign substance deposited on the surface is washed.

In addition, the raw milk infusion inlet 4 of the present embodiment includes a lower tube 45 formed with a spiral guide 451 and a perforation 452 formed through the spiral guide 451 at an upper portion thereof; An upper pipe (46) communicating with the lower pipe (45) by an opening / closing valve (b) and having a plurality of discharge holes (461) formed at the rim of the upper surface; A rotary shaft 47 protruding from a central portion of the upper tube 46; And a frame ring 482 coupled to the upper end of the rotation shaft 47 and connected to the plurality of rotation blades 481 and the ends of the plurality of rotation blades 481 at a position facing the discharge hole 461 A rotation driving unit 48; And a plurality of striking ends (49) protruding from the rotation driving part (48) and striking the vibration bar (45) according to the rotation of the rotation driving part (48).

The lower pipe 45 has the same function as the raw milk infusion (4) described in Fig. 9, so that its explanation is omitted.

The upper pipe 46 is connected to the lower pipe 45 by an on-off valve (b), and a plurality of discharge holes 461 are formed in the upper edge of the closed structure. The raw water flowing into the lower pipe 45 flows into the upper pipe 46 and is discharged upward through the discharge hole 461 when the opening / closing valve b is opened (washing process) . When the open / close valve (b) is closed (water treatment step), the raw water is discharged only through the lower pipe (45).

The rotary drive unit 48 is rotatably coupled to an upper end of a rotary shaft 47 protruding from a central portion of the upper pipe 46. The rotary drive unit 48 includes a plurality of rotary blades 481 at a position facing the discharge hole 461, And a frame ring 482 connecting the ends of the plurality of rotating blades 481. The raw water discharged through the discharging holes 461 strikes the plurality of rotating blades 481, As shown in Fig.

The striking end 49 protrudes from the rotation driving part 48 and strikes the vibrating bar 55 in accordance with the rotation of the rotation driving part 48. The raw water flowing in the cleaning step is supplied to the lower pipe 45, The raw water discharged and discharged through the perforation 452 along the helical guide 451 is blown to the hollow fiber membrane unit 2 by the blowing process and the raw water discharged through the upper pipe 46 The vibrating bar 55 is struck by the striking end 49 integrally rotating with the rotation driving unit 48 so that the foreign substances immersed in the filtration process of the hollow fiber membrane unit 2 are applied to the vibrating bar 55 So that the washing process can be performed. It is appropriate that the striking end 49 is made of a soft material.

In this embodiment, the opening / closing valve b is opened in the cleaning process so that the lower tube 45 and the upper tube 46 are communicated with each other to form a vortex through the lower tube 45 and the upper tube 46 So that vibration is applied to the vibrating bar 55 by striking the vibrating bar 55 by the rotational force of the swinging rod 49. [ .

The vibration applied to the vibrating bar 55 is transmitted to the hollow fiber membrane assembly 3 so that foreign substances deposited on the hollow fiber membrane unit 2 of the hollow fiber membrane assembly 3 can be easily removed, .

13 shows another embodiment of the filter unit 190. In this embodiment, the basic structure of the filter unit 190 is the same as that of the basic example shown in FIG. 8. In this embodiment, the pressure sensor module 7 and the control unit 8) is further configured.

The pressure sensor module 7 is composed of a plurality of pressure sensors 71, 72, 73, and 74 on the side of the housing 5, and in FIG. 13, four pressure sensors are arranged in four directions Bar, that number is optional.

The pressure sensor module 7 can detect whether the hollow fiber membrane unit 2 is clogged or broken by the pressure difference between the pressure sensors during the water treatment process. For example, when the pressure value sensed by the one pressure sensor 71 is significantly smaller than or greater than that of the other pressure sensors 72, 73, 74, the hollow fiber membrane assembly 3, Of the hollow fiber membrane unit (2) is blocked or broken.

In this case, when it is determined that the pressure value is significantly different, the predetermined set value is used as a reference, and the threshold value (critical range) for the occlusion or breakage of the hollow fiber membrane assembly 3 is derived from the experimental results. Range), the control unit 8 automatically detects this, thereby stopping the operation of the apparatus in the case of breakage or performing the cleaning process in the case of occlusion.

As an example of the action between the control unit 8 and the pressure sensor module 7, when the sensing value of the pressure sensor having the highest pressure value in the pressure sensor module 7 exceeds the breakage reference value, The control unit 8 stops the water treatment process by stopping the flow of raw water to the concentrated water outlet (4), and stops the water treatment process when the sensed value of the pressure sensor having the lowest pressure value in the pressure sensor module (7) 52 to open the cleaning process.

In this case, if the hollow fiber membrane unit 2 is broken, the introduced raw water is discharged as a broken part, thereby pressing the side surface of the housing 5 to increase the pressure value. Therefore, in the case of the breakage of the hollow fiber membrane unit 2, In the case where the hollow fiber membrane unit 2 is closed, the inflowing raw water does not flow into the occluding portion and the pressure value at the side surface of the housing 5 will be decreased. Therefore, In case of blockage of the unit (2), the pressure value to be sensed is set as the reference value for occlusion.

As described above, the oil is removed from the wastewater flowing into the oil separator 100, and the thus treated water is introduced into the anaerobic digestion tank 200.

In the anaerobic digestion tank 200, acetic acid, ammonia nitrogen and hydrogen sulfide are decomposed into biogas and carbon dioxide by acetoclastic biogas-producing bacteria, and hydrogen and carbon dioxide are decomposed into biogas and carbon dioxide by reducing biogas-producing bacteria. Thus, biogas is produced by decomposing acetic acid, ammonia nitrogen, hydrogen sulfide, and hydrogen.

14, the anaerobic digestion tank 200 includes a main body 210 which is sealed by a side wall 211 and a roof 212 so as to form a storage space therein, And a plurality of agitators (220).

In more detail, the stirrer 220 may be formed on the side wall 211 in a plurality of alternating directions as shown in FIG. 14. Here, the upper and lower alternate means that the stirrer 220 is configured to form a clearance in the circumferential direction at the side wall 211. When the stirrer 220 is formed at the upper end of the side wall 211 at a position where the stirrer 220 is installed At the next point, the stirrer 220 is formed at the lower end portion so as to be alternately arranged.

The stirrer 220 of this installation structure prevents the stirring in the lateral direction from generating the four zones. The agitation in the longitudinal direction is performed in accordance with the configuration of the flotation agitator 240 to be described below, so that the anaerobic digestion tank 200 is agitated in the transverse direction and the longitudinal direction to prevent the occurrence of the quadrangle, .

Since the stirrer 200 can use a known technique, a description of its configuration will be omitted.

As shown in FIG. 14, the anaerobic digestion tank 200 includes a floating agitator 240, which sucks the upper fluid of the organic waste suspended and accumulated in the organic waste stored in the floating agitator 240, In particular, in the case of the anaerobic digestion tank 200, the upper fluid of the stored organic waste is sucked and stirred to remove the scum that is likely to be formed on the water surface.

When the scum is deposited on the water surface, the biogas generated by the digestion action is blocked or absorbed by the scum or the like, thereby lowering the biogas capture efficiency. In the present invention, since the floating stirrer 240 is constituted, As shown in FIG.

15, the floating stirrer 240 includes a floating unit 242 having a motor 241 therein, a body 243 forming a trapping space inside the floating unit 242, A plurality of suction pipes 244 radially formed so as to communicate with each other in the longitudinal direction of the body 243 and an impeller 248 communicated with the body 243 in the longitudinal direction and connected to the motor 241 via a rotary shaft 246, And a discharge pipe (245).

The suction force is generated in the suction pipe 244 as the rotating shaft 246 and the impeller 248 cooperating with the motor 241 rotate due to such a configuration and the suction force is generated through the plurality of suction pipes 244 formed in the radial direction, The fluid and the scum collected in the body 243 are discharged downward through the discharge pipe 245 to be agitated in the longitudinal direction, Is decomposed and discharged by the impeller 248.

Meanwhile, in the present invention, a plurality of cutter blades 247 are formed on the rotary shaft 246, so that not only scum but also solids and the like are disassembled by cutting to thereby increase the stirring and scum removing efficiency.

16, the impeller 448 forms a rotating vortex, and the lower impeller 448-1 forms an inclined slope in the downward direction, thereby improving the linearity of the rotating vortex so that the anaerobic digestion tank The upper impeller 448-2 has a larger diameter than the lower impeller 448-1 and the upper impeller 448-2 is formed to have an inclined gradient in the upward direction, So that the impeller 448 agitates in the longitudinal direction to a large area to the lower end of the anaerobic digestion tank 200 to further increase the stirring efficiency.

The gas collecting unit 230 is located inside the roof 212 of the main body 200 and the fixing means to the main body 200 of the gas collecting unit 230 may be a well-known technique, . When an appropriate amount of biogas produced by the fermentation of the organic waste in the anaerobic digestion tank 200 is collected in the gas collecting unit 230, the biogas is discharged to the outside through the discharge line. As described above, To be utilized in the operation of the system.

That is, as mentioned above, the gas collected in the gas trapping unit 230 is supplied to the heating unit 400 through the reuse line (1). In the heating unit 400, the supplied biogas is used as a raw material And the generated heat is supplied to the heating means 150 through the supply line (2), thereby enabling the entire system to be operated by reusing the biogas generated in the process .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100: oil separator 200: anaerobic digester
300: oil storage tank 400: heating means

Claims (12)

A storage tank in which an inlet line through which food waste liquid flows into one side is formed and a discharge line through which a treatment liquid is discharged is formed at a lower end of the other side and an oil discharge line through which oil is discharged at the upper end of the other side is formed; An oil chamber communicating with the oil discharge line inside the storage tank and having an upper portion opened; A skimmer formed at an upper portion of the storage tank to allow oil to flow into the oil chamber; A slope plate protruding from a lower surface of the storage tank and having an upward slope at a position spaced apart from the inflow line; Heating means for warming the food stripping liquid introduced through the inflow line into the heating space formed by the side plate of the swash plate and the storage tank; A rotating plate formed at a position spaced apart from the swash plate and rotatably interlocked with the rotating shaft is formed at the upper end of the rotating plate and a depressing plate protruding to separate and deposit the separated oil is formed at the upper end of the rotating plate, A regulating unit that forms a vortex by contacting the upper end of the swash plate by the rotation of the swash plate in accordance with the magnitude of the pressurization by the oil impregnated on the deposit plate, And a filter unit for filtering and discharging the treatment liquid to the discharge line.
An anaerobic digestion tank connected to a discharge line of the oil separation apparatus and having a gas collecting unit for collecting biogas generated by internal anaerobic digestion;
And a heating means for allowing the gas collected in the gas collecting portion to flow through the reuse line to be used as a raw material and to supply the generated heat to the heating means.
The method according to claim 1,
The heating means includes:
And a heat line formed on the swash plate.
3. The method of claim 2,
Wherein the hot wire is formed on a surface of the swash plate in contact with the warm space and is provided so that a plurality of stages are formed in a transverse direction, and each stage is configured to alternate an acid and a valley.
The method according to claim 1,
The heating means includes:
And a heat exchange pipe formed at a lower portion of the heating space.
The method according to claim 1,
Wherein the swash plate
Wherein a plurality of induction plates are protruded from a surface of the body portion that is in contact with the heating space, the induction plate having a shape in which an acid and a bone are alternately formed, Processing system.
6. The method of claim 5,
And a discharge channel is formed in the acid of the induction plate.
The method according to claim 1,
Wherein the swash plate
Wherein a plurality of plate-shaped body portions forming an inclined gradient are connected by a connecting rod, and each of the body portions has a different height, and an inflow channel is formed downward between adjacent body portions.
The method according to claim 1,
The filter unit includes:
A raw milk inlet having a spiral guide formed on the inner surface of the tube whose upper end is blocked and a perforation formed through a spiral guide at an upper portion thereof; A plurality of hollow fiber membrane units formed of hollow fiber membranes having a predetermined length are fixed by a pair of upper and lower binding members to surround the raw milk feed inlet; A housing having a hollow cylindrical shell having upper and lower ends penetrated while receiving the hollow fiber membrane assembly and having a concentrated water outlet for discharging contaminants by washing; And an upper / lower header formed at a lower side thereof with raw water inlets for supplying raw water through the raw milk inlet, respectively, the upper and lower ends being connected to upper and lower ends of the housing, respectively, Wherein the waste water treatment system comprises:
9. The method of claim 8,
Wherein one or more vibrating bars are formed, one end of which is fixed to the lower header and the other end is exposed through the hollow fiber membrane assembly.
10. The method of claim 9,
The above-
A lower tube having a perforation formed through a spiral guide at an upper portion thereof while a helical guide is formed; An upper tube communicating with the lower tube by an on-off valve and having a plurality of discharge holes formed at a rim of an upper surface thereof; A rotating shaft projecting from a central portion of the upper tube; A rotation driving part coupled to the rotation shaft at a top of the rotation shaft and formed of a frame ring for connecting a plurality of rotation blades to a plurality of rotation blade ends at a position opposite to the discharge hole; And a plurality of striking ends protruding from the rotation driving unit and striking the vibration bar in accordance with rotation of the rotation driving unit.
10. The method of claim 9,
Wherein a pressure sensor module including a plurality of pressure sensors is provided on a side surface of the housing to detect whether the hollow fiber membrane unit is blocked or broken by a pressure difference between the pressure sensors.
12. The method of claim 11,
When the sensed value of the pressure sensor having the highest pressure value in the pressure sensor module exceeds the breakage reference value, the control unit interrupts the inflow of raw water into the raw milk inlet to stop the water treatment process, And when the sensed value of the pressure sensor is less than the occlusion reference value, only the concentrated water outlet is opened to perform the washing process.

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