KR101170311B1 - Device for reusing rainwater - Google Patents

Abstract

PURPOSE: A rainwater reusing apparatus is provided to use rainwater as a replaceable water resource by stably purifying the rainwater of contaminants and harmful microorganisms. CONSTITUTION: A rainwater reusing apparatus includes a settling/flux adjusting bath(10), an initial rainwater removal unit(20), a filtering bath(30), a photo catalyst sterilizing bath(40), and a storing bath(50). The settling/flux adjusting bath induces settlement of solid particles in rainwater and adjusts the amount of rainwater to be treated. The initial rainwater removal unit removes initial rainwater which is introduced into the settling/flux adjusting bath through an introducing pipe(1). An overflow wall is installed in the settling/flux adjusting bath to divide a first settling/flux adjusting bath and a second settling/flux adjusting bath. The initial rainwater removal unit is installed at the upper side of the first settling/flux adjusting bath. A floating type slanted panel is installed at the second settling/flux adjusting bath.

Description

Device For Reusing Rainwater

The present invention relates to a rainwater recycling apparatus, and more specifically, to effectively eliminate the initial rainfall and to increase the reuse rate of rainwater by allowing the pollutants and harmful microorganisms to be stably and long-term purified and maintained in accordance with the water quality standards. It relates to a rainwater reuse device to make.

As is well known, rainwater is mixed with dust and particulates accumulated on the catchment surface during rainfall, organic matter and color-causing substances generated from the rooftop greening facility, together with pollutants floating in the atmosphere such as smoke or dust in the factory.

Early rainfall is rainwater that flows out of the catchment surface at the beginning of the rainfall, and it is more polluted than rainwater collected afterwards.

Compared with general rainwater quality, the concentration of pollutants in early rainfall is common for air drainage on the surface of rooftops, roads, and roads, and greening.

Therefore, in order to obtain high quality rainwater, a facility for removing or storing initial rainfall is required.

In addition, when rainwater flows through the pipe directly below, re-injury may occur due to the sludge which is deposited on the bottom surface of the tank. Can happen.

In the case of rainwater use facilities, the inflow flow rate fluctuates, the water level is continuously changing, and the residence time of the rainwater varies from several weeks to a certain period.

The shaking of the water stream is not only caused by the water stream itself, but also has a large influence from the outside. The main ones are the density flow caused by the difference in water temperature and turbidity between the internal water and the inflow water, and the drift caused by non-uniformity of inflow and outflow.

The flow rate of the short circuit caused by the water temperature difference of 1 ° C is 10 times the average flow rate in the tank. The fluctuations of the water flow due to these external influences have a great influence on the sedimentation efficiency since substantially increasing the surface load rate and reducing the capacity efficiency.

Therefore, it is required to equip the rectification facility so that capacity efficiency can be improved without generating drift, density flow, etc. in the settling tank.

Although there are differences depending on regional and social conditions such as rainfall, urban size, and traffic volume, pollutant concentration according to rainfall effluent particle size distribution is more than 50% in particulate matter of about 100㎛. Particles over 100㎛ can be easily removed by gravity precipitation.

However, in the case of existing treatment facilities, it is difficult to treat fine particles smaller than 100 μm in most hydrodynamic solid separation devices or filtration type device facilities.

Therefore, filtration is required to remove fine particles in a relatively low concentration suspension by passing through the porous media to separate suspended solids in the liquid. In the case of conventionally used sand filtration removable particle size is 50 ~ 70㎛ or more.

However, pollutants present in rainwater contain not only organic pollutants such as aromatic hydrocarbons and heavy metals such as cadmium, but also nutrients that cause eutrophication such as nitrogen and phosphorus. May exist.

Therefore, there is a need for additional filtration means such as biofilm filtration capable of filtering endocrine obstructions including nutrients, as well as organic pollutants and heavy metals.

In addition, sterilization means are provided for sterilizing the microorganisms after filtration. In the case of sterilized products using photocatalysts, which are currently being studied or applied to real life, most of them are applied on the surface of the support on which the photocatalyst is attached in the form of a thin film rather than passing the fluid to be processed into a reactor filled with the photocatalyst to remove contaminants. It uses a method of decomposing contaminants by flowing a fluid to be treated.

Currently, catalyst materials that can be mainly used as photocatalysts include ZnO, CdS, WO ₃ and TiO ₂ , but there is no significant difference in the ability to decompose organic materials according to the type of photocatalyst. ZnO has a disadvantage in that Zn ions are generated during the photocatalytic reaction, and WO ₃ has good efficiency for a specific material but has a very limited useable area.

On the other hand, TiO ₂ does not change even when it receives light, so it can be used semi-permanently when there is no poisoning of the catalyst, and it has higher oxidizing power than chlorine or ozone and has strong sterilization and organic decomposition ability. Possible breakthrough materials and TiO ₂ powders used as photocatalysts have high photocatalytic efficiency, but present a problem of photocatalyst recovery after treatment, which raises the problem of immobilization of catalysts.

An object of the present invention for solving the above problems, to effectively remove the initial rainfall and to ensure that the contaminants and harmful microorganisms in the rainwater stable and long-term according to the water quality standards, to increase the reuse of rainwater It is to provide a rainwater reuse device.

Rainwater recycling apparatus of the present invention for achieving the above object, the sedimentation / flow adjustment tank for inducing sedimentation of the solid particles contained in the rainwater flowing through the inlet pipe and to control the rainwater treatment flow rate; Initial rainfall exclusion means installed in the sedimentation / flow adjustment tank to exclude initial rainfall flowing into the sedimentation / flow adjustment tank through the inflow pipe; A filtration tank configured to filter the sedimentation treated water transferred from the sedimentation / flow rate adjusting tank through a filtration layer; A photocatalyst sterilization / disinfection tank partitioned to sterilize and disinfect the filtered water transferred from the filtration tank using a photocatalyst; And a storage tank for storing and sterilizing sterilized water transferred from the photocatalyst sterilization / sterilization tank.

Here, the sedimentation / flow rate adjustment tank is installed inside the overflow wall for inducing water stability and sedimentation of the solid particles, the overflow wall is the first sedimentation / flow rate adjustment tank and the second sedimentation flow rate adjustment tank in the sedimentation / flow rate adjustment tank The first precipitation / flow rate adjustment tank is installed above the first sedimentation / flow rate adjustment tank is installed, and the second settling / flow rate adjustment tank is preferably provided with a floating inclined plate to induce sedimentation of the solid particles according to the water level. Do.

In addition, the initial rainfall exclusion means, the initial rainfall storage tank is partitioned to contain and store the initial rainfall flowing through the inlet pipe; A first check valve installed at an outlet of the inlet pipe at an upper portion of the initial rainfall reservoir to close the initial rainfall inflow by the water level when the water is full; An extension inlet pipe branched from the inlet pipe outlet side and extended to supply rainwater from which the initial rainfall is excluded to the sedimentation / flow adjustment tank; And a second check valve installed at a branch of the extension inlet pipe to block the inflow into the settling / flow adjustment tank when the initial rainfall is excluded.

In addition, the initial rainfall reservoir may be made of any one material selected from iron, stainless steel, polyethylene (polyethylene) or concrete.

In addition, the initial rainfall reservoir is made of a cylindrical or rectangular hexahedron having an inner receiving space, the lower shape of any one selected from the inverted triangle, inverted diamond or elliptical shape to facilitate the discharge of contaminants contained in the initial rainfall It is desirable to achieve.

In addition, the extension inlet pipe is branched from the inlet pipe is formed extending from the upper side to the lower side of the rainfall reservoir, it is preferable that the outlet side end is formed bent upward in the "J" shape.

In addition, the extension inlet pipe is branched upwardly inclined to form a predetermined inclination angle from the outlet side of the inlet pipe, the inclination angle is preferably made within the range of 30 ° to 45 °.

In addition, it is more preferable that a strainer is attached to the outlet end of the extension inlet pipe to reduce fluid disturbance.

The floating inclined plate may further include a floating plate installed to float along a vertical guide frame installed in the second settling / flow adjusting tank when the flow rate fluctuates; A plurality of inclined plates formed to be inclined in parallel with each other under the floating plate; And a overflow wear formed to protrude in parallel with the outlet of the sedimentation flow rate adjustment tank at the upper side of the floating plate.

In addition, the floating inclined plate is preferably interposed between the floating plate and the inclined plate, it is preferably configured to further comprise an adsorption cloth for adsorbing oil components mixed in the rain water.

The filtration tank is a biofilm filter carrier layer filled with a porous lightweight carrier seeded with microorganisms; And a sand filtration layer laminated under the biofilm filtration carrier layer.

The porous lightweight carrier is preferably made of pumice or obsidian vacuum spherical pearlite.

The microorganism comprises a genus of Bacillus, the microorganism of the genus Visilus is preferably Bacillus thuringiensis (Bacillus thuringiensis) or Bacillus subtillus to form a breathable anaerobic endospores.

 In addition, the microorganism includes a microorganism having a nitrification ability, the microorganism having a nitrification ability is preferably nitrobacter (Nitrobacter).

In addition, the microorganism includes a microorganism having a denitrification ability, the microorganism having a denitrification ability is preferably Nitrosomonas (Nitrosomonas).

In addition, the filtration tank is preferably provided with a first diffuser for injecting backwash air from the bottom of the sand filtration layer.

In addition, the photocatalyst sterilization / sterilization tank is preferably provided with a flow barrier for partitioning a plurality of photocatalyst reaction tank.

In addition, a UV lamp module for irradiating UV light in each of the photocatalyst reactors; A photocatalyst plate installed to promote photocatalytic reaction activity by the UV light; And a plurality of photocatalyst carriers that flow in the filtered water filled therein and promote photocatalytic reaction activity.

In addition, in each of the photocatalytic reactors, a lamp protection net is detachably installed to surround and protect the lamp module, and the lamp protection net is plastically processed by applying titanium dioxide to a mesh made of stainless steel.

In addition, the photocatalyst plate is preferably plastically coated by applying titanium dioxide to a stainless steel plate.

In addition, the photocatalyst carrier is preferably calcined by applying titanium dioxide to pumice or obsidian vacuum spherical pearlite.

In addition, the photocatalyst sterilization / sterilization tank is further provided with a second diffuser installed in the lower side of the flow wall to inject air to promote the fluidity of the photocatalyst carrier in each of the photocatalyst reaction tank.

In addition, the photocatalytic reaction tank may be made of an open or closed photocatalytic reaction tank, and the closed photocatalytic reaction tank may preferably have a closed cylindrical shape.

In addition, the storage tank is preferably provided with a recirculation pump for re-sterilizing and disinfecting the stored sterilized water to the photocatalyst sterilization / sterilization tank.

In addition, the reservoir is preferably further provided with a chlorine dioxide injector so that the residual chlorine concentration of the sterilized sterilized water is kept constant.

According to the rainwater recycling apparatus of the present invention, it is possible to efficiently exclude the rainfall and to clean and maintain the pollutants and harmful microorganisms contained in the rainwater in a stable and long-term according to the water quality standards, and to increase the reuse rate of rainwater as a substitute water resources It has the effect of enhancing value.

1 is a front sectional view showing a rainwater recycling apparatus according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the outlet end of the inflow pipe of FIG. 1.
FIG. 3 is an enlarged cross-sectional view of the end portion of the outlet side of the extension inlet pipe of FIG. 1.
4 is an enlarged cross-sectional view of the floating inclined plate of FIG. 1.
5 is a SEM photograph of pumice stone used as a biofilm filtration carrier.
6 is a micrograph of obsidian vacuum sphere pearlite used as a biofilm filtration carrier.
7 is a SEM photograph of microorganisms planted in pumice stone.
8 is a schematic diagram of biofilms formed on pumice and obsidian vacuum sphere pearlite.
FIG. 9 is an enlarged cross-sectional view of a portion of the photocatalyst reaction tank of FIG. 1.
FIG. 10 is a SEM photograph comparing states before and after application and firing of titanium dioxide to a stainless steel mesh forming the lamp protection net of FIG. 1.
11 is a SEM photograph of a photocatalyst carrier coated with titanium dioxide and calcined on pumice stone.
12 is a schematic diagram of a photocatalyst carrier obtained by coating and firing titanium dioxide on pumice and obsidian vacuum spherical pearlite.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1 is a front sectional view showing a rainwater recycling apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the rainwater recycling apparatus 100 according to the present embodiment includes a sedimentation / flow adjustment tank 10, an initial rainfall excluding means 20, a filtration tank 30, a photocatalyst sterilization / disinfection tank 40, and a storage tank 50. It is configured to include).

Therefore, the rainwater recycling apparatus 100 of the present embodiment excludes the initial rainfall containing a large amount of contaminants through the initial rainfall exclusion means 20 among the rainwater introduced through the inflow pipe 1, and then settles / flow adjustment tank 10. After the solid particles are settled, and the sedimentation treatment water transferred through the filtration tank 30 is filtered, the filtration treatment water is sterilized and disinfected through the sterilization / disinfection tank 40 and stored in the storage tank 50 to store drinking water. Re-use by dividing it into landscaping water, river maintenance water or heavy water.

Rainwater is settled in the state where the initial rainfall is excluded through the initial rainfall exclusion means 20 according to each treatment step, the initial precipitation exclusion water, and the settled state in which the solids are settled in the sedimentation / flow adjustment tank 10. Water ", the state filtered through the filtration tank 30" filtered water ", the sterilized state sterilized through the photocatalyst sterilization / disinfection tank 40" sterilized sterilized water "and the state stored in the storage tank" storage water " The terminology should be divided into two terms, but if there is no distinction between the steps, the term "rainwater" or "rainfall" will be described collectively.

First, the sedimentation / flow adjustment tank 10 induces the sedimentation of the solid particles contained in the initial rainfall exclusion water from which the initial rainfall is excluded by the initial rainfall exclusion means 20 of the rainwater flowing through the inlet pipe (1) It is configured to adjust the rainwater treatment flow rate.

Inside the sedimentation / flow rate adjusting tank 10, the overflow wall 11 is installed to induce water flow stability and sedimentation of the solid particles and to easily clean the bottom surface.

In the present embodiment, the overflow wall 11 exemplifies that the first sedimentation / flow rate adjustment tank 10a and the second sedimentation flow rate adjustment tank 10b are installed in the sedimentation / flow rate adjustment tank 10. However, the present invention is not necessarily limited thereto, and it is also possible to partition more unit sedimentation / flow adjustment tanks according to the amount of rainwater to be able to more stably settle the solid particles in the rainwater.

On the other hand, the above-mentioned initial rainfall exclusion means 20 is installed on the upper side of the first sedimentation / flow rate adjustment tank (10a), and the floating slope plate to induce sedimentation of solid particles according to the water level in the two sedimentation / flow rate adjustment tank (10b). 12 is installed.

Rainfall is collected from the rooftop, road surface, etc. of the building, and then flows through the inlet pipe through the screen, and the initial rainfall exclusion means excludes the initial rainfall corresponding to 1mm to 3mm of rainfall containing a lot of pollutants. To do that.

To this end, in the present embodiment, the initial rainfall excluding means 20 includes an initial rainfall reservoir 21, a first check valve 22, an extension inlet pipe 23, and a second check valve 24. .

The initial rainfall storage tank 21 is installed above the first sedimentation / flow adjustment tank 10 to store and store the initial rainfall flowing through the inflow pipe 1, and then automatically discharge valve 26 within 24 hours. It is configured to be discharged through the sewage pipe (2) through.

On the other hand, the initial rainfall reservoir 21 is made of a cylindrical or rectangular hexahedron having an internal receiving space to accommodate the initial rainfall, the lower shape is an inverted triangle, inverted rhombus model or so as to facilitate the discharge of contaminants contained in the initial rainfall It is preferable to have any shape selected from ellipses.

In addition, the initial rainfall storage tank 21 may be made of any one material selected from iron, stainless steel, polyethylene (PE) or concrete so as to prevent corrosion and damage caused by contaminants contained in the initial rainfall.

FIG. 2 is an enlarged cross-sectional view of an outlet end of the inlet pipe of FIG. 1, and FIG. 3 is an enlarged cross-sectional view of an outlet end of the extended inlet pipe of FIG. 1.

Referring to FIGS. 2 and 3, the first check valve 22 is installed at the outlet side of the inlet pipe 1 above the initial rainfall storage tank 10 so that the initial rainfall storage tank 21 is full. Close the inlet (1) outlet by the buoyancy to block the inflow of the initial rainfall.

The extension inlet pipe 23 is branched from the outlet side of the inlet pipe (1) and the initial rainfall exclusion water continuously introduced through the inlet pipe (1) after the initial rainfall is excluded to the initial rainfall storage tank (21) It extends to flow into the sedimentation / flow adjustment tank 10.

In addition, the second check valve 24 is installed in the branch where the extension inlet pipe 23 is branched from the inlet pipe 1 so that the initial rainfall flows into the first settling / flow adjustment tank 10a when the initial rainfall is excluded. It is blocked, and then the rain water continuously introduced, that is, the initial rainfall exclusion water is to be opened to enter the first sedimentation / flow rate adjustment tank (10a) through the extension inlet pipe (23).

On the other hand, the extended inlet pipe 23 is formed extending from the upper side of the initial rainfall storage tank 21 to the lower side from the inlet pipe 1, the initial rainfall exclusion water flowing through the first settling / flow storage tank (10a) The inlet end portion 23a is formed to be bent upwardly in a “J” shape so as to reduce the flow rate of the initial rainfall rejection water during the inflow of the furnace to prevent internal fluid disturbance and sludge re-injury.

In addition, the extension inlet pipe 23 is a predetermined inclination angle from the outlet side of the inlet pipe 1 in order to prevent the initial rainfall is introduced into the first sedimentation / flow adjustment tank (10a) in the process of excluding the initial rainfall (θ1) is branched upwardly inclined, wherein the inclination angle (θ1) is preferably made within the range of 30 ° to 45 °.

 At the outlet end 23a of the extended inlet pipe 23, a strainer 25 for reducing fluid disturbance is provided. The strainer 25 reduces the flow rate and flow of the initial rainfall exclusion water flowing into the first sedimentation / flow rate adjustment tank (10a) to reduce the fluid disturbance, thereby increasing the sedimentation efficiency of the solid particles in the constant temperature state To help.

The first settling / treatment water in which the solid particles are first settled and flowed into the first settling / flow adjusting tank 10a through the overflow wall 11 and flows into the second settling flow adjusting tank 10b is used. Through the floating inclined plate 12 floating in accordance with the change to induce the precipitation of additional solid particles.

4 is an enlarged cross-sectional view of the floating inclined plate of FIG. 1.

Referring to FIG. 1 along with FIG. 4, the floating inclined plate 12 includes a floating plate 13, a plurality of inclined plates 14, a overflow wear 15, and an adsorption cloth 16.

The floating plate 13 is floated along the vertical guide frame 17 installed in the second settling / flow adjusting tank 10b when the flow rate fluctuates and is installed to be vertically movable.

Floating plate 13 is made of a light weight polyethylene (PE) or fibrous (PVC) material, in particular, the upper plate to maintain the vacuum state so as to be able to securely floating by inserting the inclined plate 14, It is preferable that the styrofoam is formed inside the outer casing in order to prevent floating of the outer casing due to partial damage or cracking.

On the other hand, the lower portion of the floating plate 13 is formed with a fixed groove (not shown) at regular intervals so that the inclined plate 14 can be fitted.

The inclined plate 14 is inclined and fixed in parallel with each other under the floating plate 13, and the solids included in the first settling water introduced from the first settling / flow adjustment tank 10a between the inclined plates 14 are fixed. Induce secondary sedimentation of the particles.

That is, the inclined plate 14 increases the sedimentation efficiency by shortening the sedimentation distance by constructing a kind of multi-layered sedimentation space to remove fine particles, thereby reducing the surface area load rate, thereby reducing the required area, thereby providing a higher quality treatment. Allow numbers to be made.

Then, the solid particles sedimented between the inclined plate 14 is discharged to the lower direction opposite to the flow of the sedimentation treatment water by gravity to settle down the second sedimentation / flow rate adjustment tank (10b).

Here, the inclined plates 14 are preferably formed to form an inclination angle θ2 within a range of 45 ° to 60 ° from the horizontal in order for the solid particles settled by gravity to be swept away. If the inclination angle θ2 of the inclination plate becomes less than 45 °, the residue is accumulated in the inclination plate.

Meanwhile, the adsorption cloth 16 is interposed between the floating plate 13 and the inclined plate 14 to adsorb oil components mixed in the primary sedimentation treatment water introduced into the first sedimentation / flow rate adjusting tank 10a. Remove it.

In addition, the overflow wear 15 is formed to protrude upward in a trapezoidal shape in parallel with an outlet (not shown) of the settling / flow adjusting tank 10 at the upper side of the floating plate 13, and the second settling / flow adjusting tank 10b. From the secondary sedimentation treatment water to be flowed to the filtration tank 30, which is the next treatment process to serve to adjust the flow rate to maintain a constant filtration throughput.

Thus, in the present embodiment, the outlet end 23a of the extension inlet pipe 23 in the sedimentation / flow adjustment tank 10 is bent in a “J” shape and provided with rectifying means such as the strainer 25. , By installing the overflow wall 11 and the floating inclined plate 12 to improve the settling efficiency by increasing the contact between the water, from the coarse solid particles of more than 5mm to fine solid particles of 100 ㎛ or less in the sedimentation / flow adjustment tank All settled by gravity should be possible.

Referring back to FIG. 1, the filtration tank 30 passes the sedimentation treated water transferred from the sedimentation / flow adjustment tank 10 through a double filtration layer of the biofilm filtration carrier layer 31 and the sand filtration layer 35. Configured to filter.

The biofilm filtration carrier layer 31 is formed by filling the biofilm filtration carrier 32 in which microorganisms are planted. Therefore, the biofilm filtration carrier layer 31 has a physical filtration function by the biofilm 34 (microbial group) inhabiting the porous lightweight carrier 33 and a biological function of decomposing and oxidizing organic matter in the water by the biofilm 34. By simultaneously performing the same filtration tank, in addition to organic pollutants such as aromatic hydrocarbons present in rainwater, heavy metals such as cadmium, nutrients and endocrine disruptors such as nitrogen and phosphorus, and endocrine obstacles can be filtered, adsorbed and decomposed. Make sure

The porous lightweight carrier 33 constituting the biofilm filtration carrier 32 in which the microorganisms are planted may be made of pumice or obsidian perlite.

Since pumice or obsidian vacuum sphere pearlite has a large specific surface area and can hold a large amount of microorganisms, high load operation is possible, and at the same time, a large amount of microorganisms can be maintained and various distributions of microorganisms can be maintained. To get it.

FIG. 5 is a SEM photograph of pumice stone used as a biofilm filtration carrier, and FIG. 6 is a micrograph of obsidian vacuum spherical pearlite used as a biofilm filtration carrier.

Referring to FIGS. 5 and 6, the pumice stone is a volcanic rock that is cooled so rapidly that it cannot be crystallized by crystallization, and bubbles of small glass bubbles generated by suddenly escape of the gas contained in the cooling water are rocks. It is present throughout. Due to this porous structure, it is very light, has heat dissipation characteristics and structural strength, and is very chemically stable. The physical properties and chemical composition of pumice stone are shown in Table 1 below.

The particle size of the pumice stone used in this embodiment is 10-20 mm, the specific surface area is 148-170 m 2 / cm 3, specific gravity 0.4-0.7 g / cm 3, and the water content is 40-50 (v / v,%).

The obsidian ballon perlite is a collection of independent pores and is characterized by small breakage of pores. It is light in weight (0.08 to 0.60 in specific gravity) and high in strength (heating at 871 ℃ or higher after crystallization of rock, and rapidly evaporating crystal water to form numerous micropores in particles, resulting in very light and unique properties). . The small volume reduction rate can serve as a microbial carrier stably for a long time. Physical properties of the obsidian vacuum sphere pearlite are shown in Table 2 below.

It is preferable that the size of the obsidian vacuum spherical pearlite used in this embodiment is 10-20 mm.

7 is a SEM photograph of microorganisms planted in pumice stone, and FIG. 8 is a schematic diagram in which biofilms are formed in pumice and obsidian vacuum sphere pearlite.

Referring to FIGS. 7 and 8, the microorganisms planted in the pumice or obsidian vacuum spherical pearlite may include microorganisms of the genus Bacillus, microorganisms having nitrification ability or microorganisms having denitrification ability.

The microorganism of the genus Bacillus has the property of decomposing even starch and fat, which are proteins and polysaccharides, among organic components, and directly ingests or magnetizes odorous components such as ammonia, hydrogen sulfide, and amines contained in organic wastewater. Have

In addition, Bacillus secretes redox enzymes such as catalase and superoxide dismutase, and hydrolysates protease, amylase, and liposomes. Lipase is secreted to decompose proteins, polysaccharides, and fats and use them as electron donors.

 In addition, Bacillus grows using sugars, organic acids and alcohols as its carbon source, and ammonium as its nitrogen source. There are many aerobic bacteria that obtain energy by aerobic respiration with oxygen as the final electron acceptor, but some are anaerobic anaerobics that can generate energy by fermentation or anaerobic respiration even in an oxygen-free environment.

In addition, Bacillus (Bacillus) microorganisms are all chemical organic nutrients for synthesizing cellular material using organic substances as a substrate, and is generally catalase (catalase) positive. The cell wall is composed of sticky materials, so it is easily adsorbed or aggregated, and the resulting flocs are excellent in sedimentation.

Bacillus produces a wide variety of bioactive substances, many of which are secreted out of the cell. Important bioactive substances include enzymes (starch, cellulose, proteolytic enzymes, lipolytic enzymes, glucose isomerase), peptides, antibiotics (bacilysin, bacitracin, brevistin, fengycin, iturin, mycosubtilin, polymixin, polypeptin, subtilin, tridecaptin, tyrocidine).

Among them, Bacillus subtilis is well soluble in water and highly toxic to reduce Cr (VI), which is very harmful to animals or human body, to thermodynamically safest, less water-soluble, and less toxic Cr (Ⅲ). There is ability.

In addition, during the sporulation process, antibiotics such as bacitracin, polymyxin, tyrocidin, gramicidin and ciraulin are released to kill the general bacteria and E. coli groups, thereby not causing secondary pollution. In addition, by adsorbing the outer skin, contaminants are adsorbed and aggregated to improve precipitation.

Therefore, the Bacillus sp. Microorganisms applied in the present example exemplify Bacillus thuringiensis or Bacillus subtillus forming the anaerobic endogenous spores.

The microorganism having nitrification ability is nitrobacter, and the microorganism having denitrification ability may be nitrosomonas.

Referring back to FIG. 1, the sand filtration layer 35 is formed to be laminated under the biofilm filtration carrier layer 31 to filter fine solid particles having a particle size of 50 to 70 μm or more.

On the other hand, it is preferable that the first diffuser (37) for injecting the back-wash air to prevent the blockage of the filter layer in the bottom of the sand filtration layer 35 of the filtration tank 30 and to increase the amount of dissolved oxygen is preferably provided. Do.

In the present embodiment, the filtration tank 30 is formed by using a double filtration layer of the biofilm filtration carrier layer 31 and the sand filtration layer 35, organic pollutants such as aromatic hydrocarbons in rainwater, heavy metals such as cadmium, nitrogen or phosphorus, and the like. In addition to endocrine disruptors and other nutrients that cause eutrophication, it is possible to effectively adsorb, decompose and filter fine solid particles having a particle size of 50 to 70 μm or more in a relatively low concentration suspension.

FIG. 9 is an enlarged cross-sectional view of a portion of the photocatalyst reaction tank of FIG. 1.

Referring to FIG. 1 together with FIG. 1, the photocatalyst sterilization / disinfection tank 40 is configured to sterilize and disinfect the filtration treated water transferred from the filtration tank 30 using a photocatalyst.

On the other hand, in the photocatalyst sterilization / disinfection tank 40, a flow wall 41 for partitioning a plurality of photocatalyst reaction tanks is provided to sterilize and disinfect using the photocatalyst.

In the present embodiment, two photocatalytic reaction tanks 41a and 41b are partitioned by the conductive wall 41. However, the present invention is not necessarily limited to this, and it is obvious that more photocatalytic reactors may be partitioned and used depending on the amount of rainwater treatment.

In addition, the photocatalyst reaction tank of the present embodiment is illustrated to be partitioned in the photocatalyst sterilization and disinfection tank 40 by the flow walls, but the photocatalyst reaction tank itself can be used by transforming it into an external type separated from the storage tank, such as a saline dioxide injector. Of course it is.

Here, each of the photocatalytic reactors 41a and 41b may be open or closed, and in the case of the closed photocatalytic reaction tank, it is preferable to have a closed cylindrical shape.

On the other hand, in each photocatalytic reaction tank 41a, 41b, it comprises the UV lamp module 42, the stationary photocatalyst board 44, and the fluidized photocatalyst carrier 45. As shown in FIG.

The UV lamp module 42 is provided in each of the photocatalytic reactors 41a and 41b so as to irradiate UV light. In addition, a lamp guard net 43 may be provided to be detachably installed to surround and protect the lamp module 42.

The photocatalyst plate 44 is installed to promote photocatalytic reaction activity by the UV light, and the photocatalyst carrier 45 flows inside the filtered water filled therein to promote photocatalytic reaction activity.

As described above, in the present embodiment, in order to increase the decomposition efficiency of the substances and the killing rate of harmful microorganisms in the photocatalytic reaction tanks 41a and 41b, the fixed phase photocatalyst plate 44 is used as a photocatalyst which is irradiated with UV light. It illustrates that the fluidized bed photocatalyst carrier 45 is used in combination.

In this embodiment, the photocatalyst used for sterilization and disinfection is exemplified by titanium dioxide (TiO ₂ ). Titanium dioxide (TiO ₂ ) is able to obtain high oxidation power required for sterilization and disinfection by UV light irradiation, and is suitable for water treatment because it is non-toxic and inexpensive.

FIG. 10 is a SEM photograph comparing the states before and after application of titanium dioxide to the stainless steel mesh forming the lamp protection net of FIG. 1 and before and after firing. FIG. 11 is a SEM photograph of the photocatalyst carrier coated with titanium dioxide and calcined to pumice. Fig. 12 is a schematic diagram of a photocatalyst carrier obtained by coating and firing titanium dioxide on pumice and obsidian vacuum spherical pearlite.

Referring to Figures 10 to 12, the lamp protection net 43 is made of a stainless steel mesh, the surface of the titanium dioxide (TiO ₂ ) by applying it to the 450 ° C to 600 ° C range (more preferably Plastic working at a high temperature of 550 ℃).

In addition, the photocatalyst plate 44 is coated with titanium dioxide (TiO ₂ ) on a plate made of stainless steel and plastically processed at a high temperature within a range of 450 ° C. to 600 ° C. (more preferably, 550 ° C.). Here, the photocatalyst plate 44 is more preferably manufactured as a unit of a predetermined size to facilitate the firing process and the site installation.

In addition, the flowable photocatalyst carrier 45 is within the range of 450 ° C. to 600 ° C. (more preferably 550) after applying titanium dioxide (TiO ₂ ) to the above-mentioned porous lightweight carrier 33, that is, pumice or obsidian vacuum spherical pearlite. The photocatalyst layer 46 is formed by plastic working at a high temperature of (° C).

As described above, in the present embodiment, titanium dioxide (TiO ₂ ) coated together with the lamp protection net 43, the photocatalyst plate 44, and the photocatalyst carrier 45 is heat-treated at high temperature to form a titanium dioxide film as the photocatalyst layer 46. Sterilization and disinfection are performed using high oxidation power obtained by activating the photocatalyst by UV light irradiated from the UV lamp module 42.

Referring to FIG. 1 again, the photocatalyst sterilization / disinfection tank 40 underneath the flow walls 41 to promote the fluidity of the photocatalyst carrier 45 in the respective photocatalytic reaction tanks 41a and 41b. In addition, it may be configured to further include a second diffuser 47 for injecting air to increase the amount of dissolved oxygen.

In addition, the sterilized sterilized water treated in the photocatalyst sterilization / sterilization tank 40 is transferred to the storage tank 50 capable of stably storing a certain amount for a long time.

Storage tank 50 is formed to contain the sterilized sterilized water transferred from the photocatalyst sterilization / sterilization tank 40 to store.

One side of the storage tank 50 is provided with a recirculation pump 51 for re-sterilizing and disinfecting the stored storage water to the photocatalyst sterilization / disinfection tank 40, algae that may occur due to long-term storage in the storage tank 50 Or re-sterilize and disinfect harmful microbes.

In addition, the storage tank 50 is provided with a chlorine dioxide injector 52 so that the residual chlorine concentration of the stored rain water is constant, the chlorine dioxide injector 52 has a residual chlorine concentration of 0.2 stored in the storage tank 50 Maintain at or above ppm. Through this, the stable and clean water storage water is supplied to drinking water, landscaping water, river maintenance water, heavy water and the like through the water supply pump 53 of the water supply pipe 54 installed at the storage tank 50 side.

Experimental Example 1

In order to test the filtration efficiency of the filtration tank 30, artificial rainwater was prepared using Soluble Starch, (NH 4) 2 SO ₄ , NaNO ₃ , KH ₂ PO _4, and used in the experiment.

The front part of the experimental device was made of acrylic, and the back and side were made of steel structure with the size of 80cm (L) × 50cm (W) × 100cm (H). In addition, a porous plate having an inner diameter of 10 mm was installed at the bottom of the sand filtration layer 35 to prepare the treated water from the bottom thereof.

In this experimental example, the experiment was carried out by filling the pumice and the filtration sand which is a porous lightweight carrier seeded with microorganisms.

The height of the filter bed was filled with 40 cm of pumice layer at the top and 40 cm of sand at the bottom.

The microbial seeding was carried out for 10 days under the conditions of pH 6.5 and 35 ° C by immersing Bacillus subtilis microorganisms cultured at 1E + 10 CFU / ml on a porous lightweight carrier. The light weight carrier was observed by electron microscope to observe the degree of planting.

Inflow flow rate was set to 3L / min, the filtration rate was adjusted to 10m / d based on slow filtration was carried out for 1 hour. The analysis items were water temperature, pH, SS, BOD ₅ , CODMn, TN, TP, general bacteria and analyzed by water pollution process test method.

Hereinafter, Table 3 is an experimental result derived through the above experimental method.

Experimental Example 2

UV-TiO2 photocatalytic decomposition experiments were conducted to determine the contaminant resolution of artificial rainwater.

As a photocatalyst used in this experiment example, commercially available P ₂₅ from degussa was used.

The UV lamp module used in the experiment is germicidal 15W, G ₁₅ T ₈ -AN from Sanyo Denki, Japan. The light source used for the reaction has a UV-C wavelength range and the maximum wavelength band is 250 nm.

In order to fix the titanium dioxide (TiO ₂ ) in the stainless steel lattice mesh in the experimental example was performed as follows.

The beaker was filled with ultra pure water and a TiO 2 ratio of 5% (w / w), the TiO ₂ was dispersed at a rotational speed of 1,200 rpm using a stirrer, and a stainless grid (1.5 mm * 2.5 mm) was placed in the dispersion for 1 hour.

Thereafter, the resultant was dried at 105 ° C. for 1 hour, fired at 550 ° C. for 1 hour using an electric furnace, and mounted in a photocatalytic reactor.

This process was repeated to control the amount of TiO ₂ attached to the stainless steel grid. The fluidized bed photocatalyst carrier used in the experiment and the photocatalyst plate made of stainless steel were also prepared in the same manner.

The photocatalyst sterilization / sterilizer 40 is made of acrylic material 150 mm wide, 150 mm long, and 400 mm high. It was. The filling rate of the photocatalyst carrier 45 was set to 20% of the reactor capacity. The reaction was carried out batchwise and the reaction time was 1 hour.

Hereinafter, Table 4 is an experimental result derived through the above experimental method. Table 5 shows the results of experiments involving the dual filtration phase and the UV-TiO ₂ photocatalyst.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications or changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. In addition, it is natural that it belongs to the scope of the present invention.

1: inlet pipe 2: sewage pipe
10: sedimentation / flow adjustment tank 10a; 1st sedimentation / flow adjustment tank
10b: 2nd sedimentation / flow adjustment tank 11: overflow wall
12: Floating Slope Plate 13: Floating Plate
14: Slope plate 15: Overflow wear
16: adsorption cloth 17: vertical guide frame
20: initial rainfall exclusion means 21: initial rainfall reservoir
22: first check valve 23: extension inlet pipe
24: second check valve 25: strainer
26: discharge valve 30: filtration tank
31: biofilm filtration carrier layer 32: biofilm filtration carrier
33: porous lightweight carrier 34: biofilm
35: sand filtration layer 37: first diffuser
40: Photocatalyst Sterilization / Sterilization Tank 41: Current Wall
41a, 41b: photocatalytic reactor 42: UV lamp module
43: lamp protection net 44: photocatalyst plate
45 photocatalyst carrier 46 photocatalyst layer
47: second diffuser 50: reservoir
51: recirculation pump 52: chlorine dioxide injector
53: water supply pump 54: water supply pipe
100: rainwater reuse device

Claims (27)

A sedimentation / flow adjustment tank for inducing sedimentation of the solids particles contained in the rainwater introduced through the inflow pipe and adjusting the rainwater treatment flow rate;
Initial rainfall exclusion means installed in the sedimentation / flow adjustment tank to exclude initial rainfall flowing into the sedimentation / flow adjustment tank through the inflow pipe;
A filtration tank configured to filter the sedimentation treated water transferred from the sedimentation / flow rate adjusting tank through a filtration layer;
A photocatalyst sterilization / disinfection tank to sterilize and disinfect the filtered water transferred from the filtration tank using a photocatalyst; And
And a storage tank for storing and sterilizing sterilized water transferred from the photocatalyst sterilization / sterilization tank.

In the sedimentation / flow rate adjustment tank, the overflow wall for inducing water flow stability and sedimentation of the solid particles is installed to partition the first sedimentation / flow rate adjustment tank and the second sedimentation flow rate adjustment tank,

The initial rainfall excluding means is provided above the first sedimentation / flow adjustment tank,
Rainwater recycling apparatus is installed in the two sedimentation / flow rate adjustment tank is installed a floating inclined plate to induce sedimentation of the solid particles according to the water level.
delete delete In claim 1,
The initial rainfall exclusion means,
An initial rainfall storage tank partitioned to contain and store the initial rainfall introduced through the inlet pipe;
A first check valve installed at an outlet of the inlet pipe at an upper portion of the initial rainfall reservoir to close the initial rainfall inflow by the water level when the water is full;
An extension inlet pipe branched from the inlet pipe outlet side and extended to supply rainwater from which the initial rainfall is excluded to the sedimentation / flow adjustment tank; And
And a second check valve installed at a branch portion of the extension inlet pipe to block inflow into the settling / flow adjustment tank when the initial rainfall is excluded.
delete delete 5. The method of claim 4,
The extension inlet pipe,
The rainwater recycling apparatus branched from the inlet pipe extending from the upper side to the lower side of the initial rainfall storage tank, the outlet side end is formed to be bent upward in the "J" shape.
delete In claim 7,
Rainwater recycling apparatus is attached to the outlet end of the inlet pipe is a strainer for reducing fluid disturbance.
In claim 1,
The floating slope plate,
A floating plate installed to float along a vertical guide frame installed in the second settling / flow adjusting tank when the flow rate fluctuates;
A plurality of inclined plates formed to be inclined in parallel with each other under the floating plate; And
Rainwater reuse device comprising a; overflow ware protruding in parallel to the outlet of the sedimentation flow rate adjustment tank in the upper side of the floating plate.
11. The method of claim 10,
The floating slope plate,
Installed between the floating plate and the inclined plate,
Rainwater recycling apparatus further comprises an adsorption cloth for adsorbing the oil component mixed in the rainwater.
In claim 1,
The filtration tank,
A biofilm filtration carrier layer filled with a porous lightweight carrier seeded with microorganisms; And
And a sand filtration layer laminated on the biofilm filtration carrier layer.
The method of claim 12,
The porous lightweight carrier,
Rainwater reuse device comprising pumice or obsidian vacuum spherical pearlite.
The method of claim 12,
The microorganism,
Contains Bacillus microorganisms,

The microorganism of the genus Visilus,
A rainwater recycling apparatus, which is Bacillus thuringiensis or Bacillus subtillus, which forms permeable anaerobic endospores.
The method of claim 12,
The microorganism,
Including microorganism having nitrification ability,

The microorganism having the nitrification ability,
Rainwater recycling apparatus comprising a nitrobacter.
The method of claim 12,
The microorganism,
Contains microorganisms having denitrification ability,

The microorganism having the denitrification ability,
Rainwater recycling apparatus, including nitrosomonas.
delete In claim 1,
The photocatalyst sterilization / sterilization tank,
A rainwater recycling apparatus provided with a flow wall for partitioning a plurality of photocatalyst reactors.
The method of claim 18,
In each said photocatalyst reaction tank,
UV lamp module for irradiating UV light (UV) light;
A photocatalyst plate installed to promote photocatalytic reaction activity by the UV light; And
And a plurality of photocatalyst carriers that flow in the filtered water filled therein and promote photocatalytic reaction activity.
20. The method of claim 19,
In each said photocatalyst reaction tank,
Lamp protection net is provided detachably installed so as to protect the yuv wrapped around the lamp module,

The lamp protection net,
A rainwater recycling apparatus comprising plastic processing by applying titanium dioxide to a mesh made of stainless steel.
20. The method of claim 19,
The photocatalyst plate,
Rainwater recycling apparatus comprising the plastic processing by applying titanium dioxide to a stainless steel plate.
20. The method of claim 19,
The photocatalyst carrier,
A rainwater recycling apparatus comprising a plastic process by applying titanium dioxide to pumice or obsidian vacuum spherical pearlite.
delete delete delete delete delete

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