KR101198334B1 - Apparatus and Method for Treating Wastewater Using Zeolites Having Media - Google Patents

Abstract

PURPOSE: A sequencing batch type sewage-wastewater treatment apparatus using a carrier with zeolite and a method for the same are provided to ensure plenty of microorganisms and prevent the loss of zeolite by filling the zeolite in natural or synthetic resin. CONSTITUTION: A sequencing batch type sewage-wastewater treatment apparatus includes a sequencing batch reactor(1), an air supplying unit(6a), an aerator(6b), carriers(2), a sewage-wastewater introducing pipe and pump(3a), an internal circulating pipe and pump(3b), an advanced oxidizing unit(4), a coagulant supplying pipe and pump(3c), a carbon source supplying pipe and pump(3d), a sewage-wastewater exhausting pipe and valve(5a), and a sludge exhausting pipe and valve(5b). The aerator in connection with the air supplying unit is positioned at the lower part of the reactor. 10 to 100% of the reactor is filled with the carriers. The advanced oxidizing unit is selectively connected to the internal circulating pipe and oxidizes internally circulating sewage-wastewater. [Reference numerals] (4) Oxidizing unit; (AA) Introducing feed water; (BB) External carbon source; (CC) Coagulating agent; (DD) Treated water; (EE) Exhausting sludge; (FF) Air supplying unit; (GG) Zeolite charging carrier or zeolite impregnated foaming carrier

Description

Apparatus and Method for Treating Wastewater Using Zeolites Having Media}

The present invention relates to a sewage / wastewater treatment apparatus and method, and more particularly, to a zeolite-filled carrier or a zeolite-impregnated foam carrier in a sewage / wastewater treatment in a single bioreactor to prevent loss of zeolite and The present invention relates to a continuous batch sewage / wastewater treatment apparatus and method using a carrier having a zeolite capable of increasing the amount and improving the nitrogen removal efficiency and further removing phosphorus.

In general, the nitrogen / phosphorous advanced treatment method of sewage / wastewater is largely divided into the anaerobic tank, anoxic tank, aerobic tank and the continuous treatment method to flow the sewage / wastewater in a continuous manner, and a certain amount of sewage / wastewater into a single reactor After the anaerobic, anaerobic, and aerobic conditions, there is a continuous batch treatment method for batch treatment. Conventional continuous processing methods include A ₂ O, 5-stage Badenpo, Post-lip, UCT, etc., and continuous batch methods include SBR (Sequencing Batch Reactor) and SBBR (Sequencing Batch Biofilm Reactor). It is used.

These techniques are all advanced from the existing organic sludge-based activated sludge process. The continuous treatment method is the mechanism of nitrogen removal through anaerobic biological nitrification and anaerobic denitrification, phosphorus release of anaerobic microorganisms, and phosphorus excess intake of aerobic tanks. It is a method using biological mechanisms, and the continuous batch method is a method of treating sewage / wastewater biologically by changing a series of conditions of anaerobic, anaerobic and aerobic tanks in a single reactor.

On the other hand, in the advanced biological nitrogen treatment method, nitrogen is removed by an anoxic tank and an aerobic tank in a continuous treatment method such as MLE, and nitrogen is removed by an oxygen-free condition and an aerobic condition in a continuous batch method. It is determined by the return rate or the dilution rate. In addition, the biological advanced treatment method, using the anaerobic and aerobic tank or the biological mechanism of the release (Release) and Uptake (by anaerobic and aerobic conditions), wherein the phosphorus removal efficiency is the organic / nitrogen / phosphorus concentration ratio, Sludge retention time (SRT) is affected.

Therefore, these techniques are difficult to achieve more than 50 ~ 80% of nitrogen removal efficiency at the limit of return ratio or dilution rate, and even in the case of sewage in the case of sewage due to the limitation of operating conditions such as organic matter / nitrogen / phosphorus concentration ratio of influent, sludge residence time, etc. Although it shows 70 ~ 90% removal efficiency, it shows very low removal efficiency according to sewage / wastewater properties.

In order to solve this series of problems, new technologies have been developed by various developers. In particular, in the case of nitrogen, sewage / wastewater treatment methods using zeolite having ion exchange capacity of ammonia nitrogen (e.g. Korea Patent No. 0282212, No. 0275004, 0273856, 0188878, 0188804, 0465851, 10-0869058, 10-0869059, 10-0889037, 10-1020786, Korea Patent Publication No. 2002- 0002448, Japanese Patent No. Hei 10-99893, Japanese Patent Laid-Open No. 2000-3259875) and the like have been reported.

However, most of these techniques are simply using a granular or powdered zeolite using ion exchange capacity of ammonia nitrogen of zeolite as a carrier or by introducing into a continuous reaction tank, and are not continuous methods using biological regeneration mechanism of zeolite. Therefore, nitrogen removal efficiency beyond biological removal efficiency using microbial growth or biological nitrification and denitrification is difficult to obtain. However, "Japanese Patent Application Laid-Open No. 10-99893" uses a biological zeolite regeneration mechanism, but there is a problem in that continuous zeolite replenishment is required by using a powder zeolite in a continuous treatment reactor.

Therefore, the present inventors have invented techniques for treating sewage / wastewater using a biological regeneration mechanism of zeolites (Korea Patent Nos .: 10-0243729, 10-0825518, and 10-0432437). . Among them, No. 10-0243729 and No. 10-0825518 invent the powder-type zeolite into a sewage / wastewater continuous treatment process consisting of an aerobic tank and an anoxic tank, and high nitrogen removal efficiency can be achieved. With the loss of zeolites, there is a problem that requires constant replenishment and no further treatment of phosphorus is considered. In order to compensate for this, the invention of the sewage / wastewater treatment method using a continuous batch reactor filled with granular zeolite was able to achieve higher nitrogen removal efficiency without additional replenishment of zeolite, but it filled the granular zeolite itself. Due to the air supply for nitrification for the regeneration of zeolite in one continuous batch reactor, the particles are broken and lost due to the collision between the zeolites and the specific gravity of the zeolite (about 2.2) is high, which requires a lot of energy and backwashing when backwashing. Due to the low porosity of the zeolite, the treatment water rejection rate is high, and the reaction tank must be large. There is a problem of low microbial retention and no further treatment method of phosphorus is considered.

Therefore, the conventional sewage / wastewater treatment methods as described above have a problem in that the zeolite itself is used as a biological carrier even if the regeneration mechanism of the zeolite is not used or used. In addition, since additional methods for removing phosphorus are not considered in addition to biological phosphorus removal, it is difficult to achieve treatment efficiency by strengthening the treatment water quality standard of sewage / wastewater, thus requiring additional additional facilities.

Therefore, an object of the present invention is to charge a zeolite-filled carrier or a zeolite-impregnated foam carrier in a single reactor and to change the existing operation method of the continuous batch to prevent the loss of zeolite and increase the microbial mass by biological nitrification and denitrification. The present invention provides a continuous batch sewage / wastewater treatment apparatus and method using a carrier having a zeolite capable of achieving additional nitrogen removal efficiency by utilizing ion removal and a biological regeneration of zeolite together with nitrogen removal.

In addition, another object of the present invention is to add a flocculant before the discharge (exclusion) of the treated water to enable the removal of chemicals along with biological removal of zeolite that can treat organic matter, nitrogen, phosphorus and suspended solids with high efficiency It is to provide a continuous batch sewage / wastewater treatment apparatus and method using a carrier having a.

Meanwhile, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

To this end, according to the present invention, a continuous batch reactor; An air supply device installed outside the reaction tank; An air diffuser located at the bottom of the reactor in a state connected to the air supply device; A natural or synthetic resin carrier filled with a zeolite having a specific gravity of 10 to 100% of the reaction tank volume in the upper portion of the acidic device or a foamed carrier impregnated with zeolite; An inlet pipe and a pump installed at an upper side of the reactor for inflow of waste water; An internal circulation pipe and a pump installed in the upper portion from the lower side of the reactor to circulate the waste water / waste water; An advanced oxidizer selectively connected to the internal circulation pipe to oxidize sewage / waste water circulated internally; A coagulant supply pipe and a pump installed at the upper side of the reaction tank to supply a coagulant; A carbon source supply pipe and a pump installed at an upper side of the reactor for supplying a carbon source; An outlet pipe and a valve installed in the internal circulation pipe to which the advanced oxidizer is connected for discharge of sewage / wastewater; And there is provided a continuous batch sewage / wastewater treatment apparatus using a carrier having a zeolite including a sludge outflow pipe and a valve installed on one side of the reaction tank for the disposal of excess sludge.

Here, the zeolite-filled carrier, the natural or synthetic zeolite having a diameter of 1 to 20mm is filled into a cube or spherical natural or synthetic resin having a diameter of 0.5 to 10cm, and the specific gravity is preferably in the range of 1-2. • It must be water-permeable to ensure contact with the waste water.

In addition, the foamed carrier impregnated with the zeolite may have a hexahedral or spherical shape having a specific gravity of 0.5 to 3 cm in which a natural zeolite having a diameter of 1 to 5 mm is impregnated into a polymer material made of polyethylene or polyurethane and foamed. It is desirable to have.

On the other hand, according to the present invention, a sewage / wastewater treatment apparatus comprising a continuous batch reaction tank filled with a carrier having a zeolite, the sewage / wastewater inflow step into which the waste / waste water flows into the reaction tank; Anaerobic / anaerobic condition treatment step of removing nitrogen and organic matter through denitrification and ion exchange reaction in the anaerobic or anaerobic state, the sewage / wastewater introduced into the reactor; A flocculant input / aeration step in which a flocculant is added to the reactor and aerated to mix with the waste / wastewater to further remove phosphorus in the anaerobic / anaerobic sewage / wastewater; A sewage / wastewater discharging step of discharging sewage / waste water from which the flocculation agent aeration / aeration is completed and passed through a carrier packed bed to the outside of the reaction tank; An aerobic condition treatment step of regenerating the zeolite by exhaling the treated water mixed with the zeolite-filled carrier or the zeolite-impregnated foamed carrier after the discharge of the sewage / waste water in an oxygen supply state; And a continuous batch sewage / wastewater treatment method using a carrier having a zeolite periodically operated in the order of the sludge discharge step to discharge the sludge desorbed to the outside after the treated water is aerobic treatment is provided.

Here, the zeolite in the sewage / wastewater inflow step and the anaerobic / anaerobic condition treatment step is preferably ion-exchange reaction of ammonia nitrogen contained in the inflow water to minimize nitrogen discharge to the effluent.

In addition, the aerobic condition treatment step, it is preferable to regenerate the zeolite by increasing the [Na ⁺ ] / [NH ₄ ⁺ ] ratio value in the solution by converting ammonia nitrogen in the water biologically nitrate nitrogen.

Therefore, according to the present invention, a zeolite-filled carrier or a zeolite-impregnated foam carrier is charged in a single reactor, and the operating method of conventional inflow, anaerobic / oxygen-free, aerobic, and discharged in a continuous batch is changed by biological nitrification and denitrification. Achieve additional nitrogen removal efficiency by zeolite together with nitrogen removal, and by filling zeolite into natural or synthetic resin to prevent the loss of zeolite and securing more microbial amount, it is possible to stable and economical biological wastewater treatment. .

In addition, ultra-high and low wastewater treatment devices capable of treating organic matter, nitrogen, phosphorus and suspended solids with high efficiency by inputting a flocculant before discharging (removing) the treated water to enable biological removal and chemical removal. It is a way.

On the other hand, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a view schematically showing a continuous batch sewage / wastewater treatment apparatus using a carrier having a zeolite according to a preferred embodiment of the present invention;
2 is a view schematically showing a wastewater / wastewater treatment method using the wastewater / wastewater treatment apparatus of FIG. 1; And
FIG. 3 is a view showing a mass resin of nitrogen which is further removed by zeolite in a continuous batch reactor in operation according to the wastewater / wastewater treatment apparatus and method of FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing a continuous batch sewage / wastewater treatment apparatus using a carrier having a zeolite according to a preferred embodiment of the present invention, Figure 2 is a wastewater / wastewater treatment method using the sewage / wastewater treatment apparatus of FIG. Figure 3 is a schematic diagram, Figure 3 is a view showing the mass balance of nitrogen is further removed by the zeolite in a continuous batch reactor in operation according to the sewage / wastewater treatment apparatus and method of FIG.

1 to 3, a continuous batch sewage / wastewater treatment apparatus using a carrier having a zeolite according to a preferred embodiment of the present invention has a rectangular or circular tower structure, which has a capacity according to the amount of wastewater / wastewater to be treated. The continuous batch reactor (1), which is determined and manufactured, an air supply unit (6a) installed outside the reactor (1), and an air disperser located at the bottom of the reactor (1) in a state connected to the air supply (6a) A device 6b, a natural or synthetic resin carrier filled with a zeolite having a specific gravity of 10 to 100% of the volume of the reactor 1 on the upper side of the air diffuser 6b or a foamed carrier impregnated with zeolite (2), the inlet pipe and pump (3a) is installed in the upper side of the reaction tank (1) for the inflow of waste water / the internal circulation is installed in the upper portion from the lower side of the reaction tank (1) to circulate the waste / waste water Piping and pumps (3b), phase Advanced oxidation apparatus 4 for selectively oxidizing sewage / waste water circulated internally by being selectively connected to an internal circulation pipe, a coagulant supply pipe and a pump 3c installed at an upper side of the reactor 1 for supplying a coagulant, and Carbon source supply pipe and pump (3d) is installed to supply the carbon source in the upper portion of the reaction tank (1), the outlet pipe and valve is installed for the discharge of sewage / waste water in the inner circulation pipe connected to the advanced oxidizer (4) (5a) and a sludge outflow pipe and a valve (5b) installed on one side of the reaction tank (1) for the disposal of excess sludge.

Here, the continuous batch sewage / wastewater treatment apparatus using the carrier having the zeolite is filled with a predetermined amount of sand or ceramic material under the zeolite-filled carrier or the zeolite-impregnated foam carrier (2) to filter the multilayer. It is desirable to allow to be derived.

The zeolite-filled carrier may be filled with a natural or synthetic zeolite having a diameter of 1 to 20 mm in a hexagonal or spherical natural or synthetic resin material having a diameter of 0.5 to 10 cm, and finally having a specific gravity of 1 to 2, and having a reaction tank (1 ) Is preferably filled in 10 to 100%, the foamed carrier filled with the zeolite has a specific gravity of 5 to 30 mm in which a natural zeolite having a diameter of 1 to 5 mm is impregnated with a polyethylene or polyurethane polymer material and foamed. It is preferable to have a hexagonal or spherical shape in the range of 1 to 2, and to fill the reactor 1 with 10 to 100%.

Hereinafter, a method of operating the wastewater / wastewater treatment apparatus through a continuous batch sewage / wastewater treatment method using a carrier having a zeolite according to a preferred embodiment of the present invention will be described in detail.

First, the sewage / wastewater treatment device having the configuration as described above, the sewage / wastewater inflow step (A) in which the sewage / wastewater flows into the reaction tank (1), the sewage / wastewater introduced into the reaction tank (1) is anaerobic or Anaerobic / anaerobic condition treatment step (B) to remove nitrogen and organics through denitrification and ion exchange reaction in anaerobic state, and flocculant is added to reactor (1) to further remove phosphorus from the anaerobic / anaerobic sewage / wastewater. A flocculant input / aeration step (C) to be input and aerated to be mixed with the wastewater / wastewater, and the sewage / wastewater, which has been flocculated by the flocculant injection / aeration treatment, is discharged to the outside of the reaction tank 1 through the carrier packed bed. After the wastewater discharge step (D), the sewage / wastewater is discharged, the treated water mixed with the zeolite-filled carrier or the zeolite-impregnated foam carrier (2) is treated with aerobic treatment under an oxygen supply state to ammonia in water. Nitrogen ah In the order of the aerobic condition treatment step (E) for the regeneration of the zeolite by a biological mechanism that is converted to acidic or nitrate nitrogen and the sludge discharge step (F) for discharging the sludge desorbed after the treated water is exhaled to the outside It is operated periodically.

The sewage / wastewater inflow step (A) is a sewage / wastewater that has undergone a basic pretreatment process such as pH adjustment and removal of contaminants and is introduced into the reaction tank 1 for a predetermined time by an inflow pipe and a pump 3a. The wastewater is mixed with sewage / wastewater remaining in the existing reactor 1 after undergoing nitrification (aerobic condition) reaction of the reactor 1.

The anoxic / anaerobic condition treatment step (B) is to treat the sewage / wastewater introduced into the reactor 1 in anoxic or anaerobic state to remove nitrogen and organic matter through denitrification and ion exchange reactions. There is no oxygen / anaerobic condition is operated for a certain time, at this time, by the internal circulation pump (3b) circulating the sewage / wastewater of the reaction tank (1) is a smooth contact of the sewage / wastewater and microorganisms.

In the anoxic / anaerobic condition as described above, denitrification is mainly carried out by microorganisms, but decomposition of organic matter and reaction of nitrogen gas (N ₂ ) of nitrate nitrogen (NOx-N) are performed as shown in Equation 1 below. The ammonia nitrogen in the influent is also ion exchanged with the zeolite packed in the carrier to complete the treatment of the organics and nitrogen in the sewage / wastewater.

^{_{NO 3 - + organic carbon → NO}} 2 - + organic carbon → N 2 + CO 2 + H 2 O ---- (1)

(nitrate) (nitrite) (nitrogen gas)

However, since there is a shortage of carbon sources (organic matters) necessary for denitrification according to the properties of the sewage / wastewater, it is possible to supply organic materials necessary for denitrification by endogenous breathing of microorganisms by increasing the anoxic / aerobic condition operating time. At this time, the ammonia nitrogen generated by endogenous respiration is additionally ion exchanged with zeolite, so that low concentration of nitrogen is continuously maintained in water. At this time, the principle that the ammonia nitrogen concentration of the reaction tank (1) by the ion exchange is lowered as in the following equation 2.

Z-Na ⁺ + NH ₄ ⁺ ⇔ Z-NH ₄ ⁺ + Na ⁺ --------- (2)

Where Z: zeolite

In addition, after the inflow of sewage / wastewater flows into the reactor 1 by V _F , ammonia nitrogen is ion-exchanged according to the selectivity by the zeolite in anoxic state. This reaction continues until equilibrium is reached and once equilibrated, no further reactions occur. Therefore, the ammonia nitrogen in the reactor 1 can be represented by nitrogen ion-exchanged in zeolite and nitrogen remaining in the solution phase. This is expressed as in Equation 3 below.

N _in ? V _F = N _R ? (V _F + V _L ) + N _Z ? M ------------------ (3)

Where N _in : ammonia nitrogen concentration of influent (mg / L)

N _Z : Ammonia nitrogen amount exchanged with zeolite (mg / g)

N _R : Ammonia nitrogen concentration remaining in water (mg / L)

M: amount of zeolite (g) charged in the reactor

Here, the amount _Z N? Wherein M of the ammonium nitrogen by ion exchange on the zeolite in the formula 3 is equal to the equation (4).

N _Z ? M = n _o -n _e ------------------------------ (4)

Where n _{o is the} amount of ammonia nitrogen introduced (= N _in ? V _F ) (mg)

n _e : Amount of ammonia nitrogen remaining in water (mg)

In addition, if the sewage / wastewater is discharged by V _F after the denitrification and ion exchange reactions are completed in the anoxic state, the nitrogen concentration of the treated water at this time is as shown in Eq.

--------------------(5)

-------------------- (5)

Here, if Equation 5 is rearranged for each term, after the denitrification and ion exchange reaction is completed in anoxic state as shown in Equation 6, the treated water of N _R = N _eff concentration can be obtained by flowing out by the amount of V _F. .

--------------(6)

-------------- (6)

At this time, when the organic matter necessary for denitrification is insufficient in the sewage / wastewater, an external carbon source such as methanol, acetic acid, high concentration organic wastewater, and solubilized sludge may be replenished with the organic matter deficient for denitrification through an external carbon source inlet pipe 3d.

The flocculant input / aeration step (C) is to be aerated to agglomerate into the reaction tank (1) and mixed with the sewage / wastewater to remove the phosphorus of the anaerobic / anaerobic sewage / wastewater, the anaerobic or oxygen free When the operation time of the condition is over, a certain amount of flocculant is introduced into the reaction tank 1 through the flocculent inlet pipe 3c, which may be performed when further removal of phosphorus in the sewage / wastewater is required to a low concentration.

Here, the air supply device 6a is operated for a predetermined time at the same time as the inflow of the flocculant, and the aeration is performed. It stops before ion exchange (regeneration) begins. At this time, if hardly decomposable organic matter (including color) and organic nitrogen remain in the sewage / wastewater, it is decomposed using an advanced oxidizer (4) to which ozone, UV, etc. connected to the internal circulation pipe (3b) are applied. Can promote. When this process is completed, the operation of the air supply device 6a is stopped.

The sewage / wastewater discharge step (D) is to discharge the sewage / wastewater from which the flocculation treatment is completed by aeration treatment to be mixed with the flocculant to the outside of the reaction tank 1, and when the process for removing phosphorus is completed, the outflow pipe 5a. It is discharged through the advanced oxidizer (4) when it is necessary to comply with the standards such as coliform water. Can be used as a disinfection device.

On the other hand, when the aeration process is stopped, the sludge desorbed from the carrier 2 is accumulated on the packed layer of the carrier 2 filled with zeolite. When sludge is accumulated over a predetermined thickness, the sludge is discharged through the sludge discharge pipe 5b. This process can be made the same in this step in place of the sludge discharge step (F) described below.

The aerobic condition treatment step (E) is to perform regeneration of the zeolite by aerobic treatment in the oxygen supply state of the treated water mixed with the carrier (2) filled with the zeolite after the discharge of the sewage / waste water, When the discharge of the sewage / wastewater treatment water is completed, the reaction tank 1 is again aerated by the air supply device 6a and the diffuser 6b, wherein the air supply nitrifies the ammonia nitrogen in the sewage / wastewater. It is intended to convert to nitric acid (or nitrite) nitrogen, through which biological regeneration of the zeolite which desorbs the ammonia nitrogen ion-exchanged to the zeolite into water is carried out. When supplied, ammonia nitrogen in the water is converted into nitrate nitrogen by the nitrifier as shown in Equation 7 below.

^{_{NH 4 + + O 2 (Nirosomonas}} ) → NO 2 - + O 2 (Nitrobactor) → NO 3 - ---- (7)

In addition, due to the equilibrium, the ammonia nitrogen of the zeolite is continuously exchanged with ions such as Na ⁺ in water, wherein the equation relating to the regeneration of the zeolite is shown in Equation 8.

------------------(8)

------------------(8)

_NH4 ⁺: 용액중의 암모니아성 질소의 평형농도, here,

_NH4 ⁺ : equilibrium concentration of ammonia nitrogen in solution,

R: [Na ⁺ ] / [NH ₄ ⁺ ] ratio in solution

Here, according to Equation 8, the zeolite is regenerated when the R value is increased. Increasing the R value by using NaCl or NaOH is chemical regeneration, and by increasing the R value by nitrifying ammonia nitrogen in water. .

Therefore, as a result, the R value increases due to biological nitrification, and the ammonia nitrogen released from the zeolite by concentration equilibrium is continuously converted into nitrite or nitrate nitrogen by nitrifying bacteria attached or suspended on the carrier. Playback takes place. The degree of regeneration can be determined by the concentration of nitrate nitrogen in water, and when operating under aerobic conditions for nitrification, circulation by the internal circulation pump 3b is not necessary, and the operation of the advanced oxidizer 4 is not necessary. . In addition, when the air supply for the aerobic condition is stopped, the sludge may be disposed in the same manner as the sludge discharge step (F). After the regeneration of zeolite is completed through nitrification by operating the reaction tank 1 under aerobic conditions, the wastewater / wastewater is introduced into the reaction tank 1 by the amount (V _F ) discharged for a predetermined time to decompose and denitrate organic matter. Operation of anaerobic or anaerobic conditions for oxidation is resumed.

The sludge discharge step (F) is to discharge the sludge desorbed by overgrowth after the treated water is aerobic treatment, the microorganisms are continuously grown by the operation of the reaction tank (1) of the reaction tank (1) Since clogging or blocking may affect the reaction of the reaction tank 1, it is preferable to appropriately remove the microorganisms detached from the carrier 2 or overgrown.

Here, the sludge disposal is preferably carried out after the aeration in the operating cycle, so it is appropriate that the sludge is disposed after the flocculant injection / aeration or after the aerobic condition, and it is also necessary to supply additional air for the backwash effect.

Hereinafter, a description will be given of a continuous batch sewage / wastewater treatment method using a carrier having a zeolite according to a preferred embodiment of the present invention.

First, according to the method of operating the above series of processes in anaerobic or anaerobic and aerobic conditions continuously in a single reactor, organic substances, nitrogen, phosphorus, suspended solids and other contaminants such as pollutants in sewage / wastewater, etc. Is continuously treated with high efficiency, the embodiment of the sewage / wastewater treatment applying this will be described with reference to Tables 1 to 5 and the graph as follows.

Reactor  Specifications division Specification (mm) Etc Continuous Batch Biofilm Reactor 160D ㅧ 500H
(YOU 200H) Biocarrier Fill Rate 50% (250H)

As shown in Table 1, the reactor (1) was made of acrylic material, two circular reactors of 10 L effective capacity and installed in the S University sewage treatment plant was performed using the actual sewage. Here, the biocarrier used is a carrier having a specific gravity of 1.5 by filling an average 10 mm spherical plastic with an average of 2 mm diameter of Kowloon natural acid zeolite, or foamed by impregnating a polymer material of polyethylene material with an average of 2 mm diameter of Kowloon natural acid zeolite. The hexagonal carrier having an average specific gravity of 10 mm of 1.5 was filled with 50% in the reactor, and then seeded with sludge in a sewage treatment plant and adapted for about 1 month to form a biofilm, and then normal operation was performed.

Reactor A to achieve the purpose of sewage / wastewater treatment in accordance with the present invention is operated in a continuous batch sequence in the order of “inflow → anaerobic or anaerobic conditions → coagulant administration → aeration → discharge → (sludge waste) → aerobic conditions”. Reactor B for the control experiment was operated in the conventional continuous batch reactor operation in the order of "inflow → anaerobic or anaerobic conditions → aerobic conditions → discharge → (sludge waste)". The cycle time was 8 hours, the same for both reactors, and the discharge and inflow of treated water consisted of 30% of the reactor capacity in one cycle. In this experiment, the advanced oxidizer (4) was not installed.

Reactor Operation Condition A inflow Anaerobic (or anaerobic) Coagulant administration
And aeration exhaust Sludge Waste Expiration 20 minutes 3 hours 20 minutes 10 minutes 10 minutes 4 hours

Reactor Operation Condition B Reactor inflow Anaerobic (or anaerobic) exhaust Sludge Waste Expiration 20 minutes 3 hours 20 minutes 20 minutes 4 hours

Afterwards, the two reactors were operated simultaneously for about three months at the same time and the results showed that BOD ₅ and COD _cr of organic _matters showed more than 95% treatment efficiency in both reactors, but total nitrogen (TN) was A reactor. The ion exchange and continuous regeneration effects of the zeolite resulted in about 91% efficiency and the B reactor had no efficiency of zeolite ion exchange, resulting in about 65% efficiency. While the treatment efficiency was shown, B reactor without the flocculant showed about 70% treatment efficiency. In addition, the suspended solids showed 99% treatment efficiency in both reactors, and the concentration of the treated water was less than 1 mg / L.

Experiment result A reactor Item unit Inflow (average) Treatment water (average) Removal rate (%) BOD ₅ mg / L 171.8 2.5 98.5 CODcr mg / L 250.1 7.5 97.0 SS mg / L 59.6 0.8 98.7 T-N mg / L 55.7 5.3 90.5 T-P mg / L 5.6 0.1 98.2

Experiment Result B Reactor Item unit Inflow (average) Treatment water (average) Removal rate (%) BOD ₅ mg / L 171.8 2.7 98.4 CODcr mg / L 250.1 7.6 97.0 SS mg / L 59.6 0.8 98.7 T-N mg / L 55.7 19.6 64.8 T-P mg / L 5.6 1.5 73.2

)을 적용하여 모델링을 수행한 결과를 나타낸 아래의 그래프에서와 같이, 이온교환능이 없는 경우에는 배제율(희석율)에 따라 암모니아성 질소의 제거율이 결정된 반면, 제올라이트가 충전된 담체(2)가 충전된 반응조의 경우 배제율(희석율)과 상관없이 높은 암모니아성 질소 제거율을 보였으며, 실험으로 수행한 결과도 이와 유사한 값을 보였다. 결과적으로 암모니아성 질소에 대하여 이온교환능이 있는 제올라이트가 충전된 담체 또는 제올라이트가 함침된 발포성 담체를 활용하여 기존의 고도질소처리공법에 비하여 월등한 질소처리효율은 물론 인과 유기물 제거도 효율적으로 처리할 수 있음을 보였다. That is, the zeolite ion exchange capacity of the carrier 2 filled with zeolite and the conditions of Equations 3 to 5 and FIG.

As shown in the graph below showing the results of modeling with), in the absence of ion exchange capacity, the removal rate of ammonia nitrogen was determined according to the exclusion rate (dilution rate), while the zeolite-filled carrier 2 was charged. Regardless of the rejection rate (dilution rate), a high ammonia nitrogen removal rate was observed, and the experimental results showed similar values. As a result, by utilizing a zeolite-filled carrier or zeolite-impregnated foam carrier with ion exchange ability against ammonia nitrogen, it is able to efficiently process phosphorus and organic matter removal as well as superior nitrogen treatment efficiency compared to the existing high nitrogen treatment method. Showed that.

graph. Zeolite On ion exchange capacity  Nitrogen Removal Efficiency modelling  result

Therefore, according to the present invention, the nitrogen removal efficiency depending on the dilution rate can be added to the ion exchange capacity of the zeolite to ammonia nitrogen and the biological regeneration mechanism as compared with the conventional biological nitrogen / phosphorus advanced treatment method to achieve higher nitrogen removal efficiency. In addition, by adding a flocculant to biological phosphorus removal, further phosphorus removal is possible, thereby achieving high phosphorus removal efficiency.

In addition, the use of biological carriers composed of natural or synthetic resins and zeolites or foams ensures high microbial reserves and can treat sewage / wastewater with high efficiency at a faster time. It is possible to separate and stably obtain high quality treated water at very low suspended solids concentration level, and it is easy to backwash effect by using low specific gravity carrier. It is possible to provide a high-efficiency sewage / wastewater treatment apparatus and method for coping with contaminants (organic matter, nitrogen, etc.) or Escherichia coli more effectively and economically and reliably in response to tightening sewage / wastewater regulations.

Although the present invention has been described with reference to the specific embodiments, various modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the invention is not to be determined by the embodiments described, but should be determined by equivalents of the claims and the claims.

Claims (6)

delete Continuous batch reactor (1);
An air supply device 6a installed outside the reaction tank 1;
An air diffuser (6b) located at the bottom of the reaction tank (1) in a state connected to the air supply (6a);
A carrier 2 filled with a zeolite having a specific gravity of 1 to 2 in a specific gravity of 10 to 100% of the volume of the reaction tank 1 on the upper side of the air diffuser 6b;
An inlet pipe and a pump (3a) installed at the upper side of the reaction tank (1) for inflow of waste water;
An internal circulation pipe and a pump (3b) installed in the upper portion from the lower side of the reaction tank (1) to circulate the waste water / waste water;
An advanced oxidizer (4) for selectively oxidizing sewage / waste water circulated internally by being selectively connected to the internal circulation pipe;
A coagulant supply pipe and a pump (3c) installed for supplying a coagulant to an upper portion of the reaction tank (1);
A carbon source supply pipe and a pump (3d) installed at an upper side of the reaction tank (1) for supplying a carbon source;
Outflow pipe and valve (5a) is installed for the discharge of sewage / waste water in the internal circulation pipe connected to the advanced oxidation device (4); And
It includes a sludge outflow pipe and a valve (5b) installed on one side of the reaction tank (1) for the disposal of excess sludge,
The zeolite-filled carrier,
Continuous batch type using a carrier having a zeolite, characterized in that the final specific gravity is in the range of 1 to 2 by filling a natural or synthetic zeolite having a diameter of 1 to 20 mm into a hexagonal or spherical shape having a diameter of 0.5 to 10 cm of natural or synthetic resin material. Sewage / Wastewater Treatment System. Continuous batch reactor (1);
An air supply device 6a installed outside the reaction tank 1;
An air diffuser (6b) located at the bottom of the reaction tank (1) in a state connected to the air supply (6a);
An expandable carrier (2) impregnated with a zeolite having a specific gravity of 1 to 2 which is filled in the range of 10 to 100% of the volume of the reaction tank 1 on the upper side of the air diffuser 6b;
An inlet pipe and a pump (3a) installed at the upper side of the reaction tank (1) for inflow of waste water;
An internal circulation pipe and a pump (3b) installed in the upper portion from the lower side of the reaction tank (1) to circulate the waste water / waste water;
An advanced oxidizer (4) for selectively oxidizing sewage / waste water circulated internally by being selectively connected to the internal circulation pipe;
A coagulant supply pipe and a pump (3c) installed for supplying a coagulant to an upper portion of the reaction tank (1);
A carbon source supply pipe and a pump (3d) installed at an upper side of the reaction tank (1) for supplying a carbon source;
Outflow pipe and valve (5a) is installed for the discharge of sewage / waste water in the internal circulation pipe connected to the advanced oxidation device (4); And
It includes a sludge outflow pipe and a valve (5b) installed on one side of the reaction tank (1) for the disposal of excess sludge,
The foamed carrier impregnated with the zeolite,
The zeolite-impregnated carrier having a hexahedral or spherical shape having a specific gravity of 0.5 to 3 cm in diameter by foaming by impregnating a natural zeolite having a diameter of 1 to 5 mm with a polymer material made of polyethylene or polyurethane Continuous batch sewage / wastewater treatment device. A sewage / wastewater treatment apparatus comprising a continuous batch reactor (1) filled with a carrier having a zeolite,
Sewage / wastewater inflow step (A) in which the waste / waste water flows into the reactor (1);
Anaerobic / anaerobic condition treatment step (B) to remove nitrogen and organic matter through denitrification and ion exchange reaction in the anaerobic or anaerobic state, the sewage / wastewater introduced into the reaction tank (1);
A flocculant input / aeration step (C) in which a flocculant is introduced into the reaction tank (1) and aerated to mix with the waste / wastewater to remove phosphorus in the anaerobic / anaerobic sewage / wastewater;
Sewage / wastewater discharge (discharge) step is discharged to the outside of the reaction tank (1) through the carrier filling layer is completed the flocculation / aeration flocculation treatment;
(E) an aerobic condition treatment step of regenerating the zeolite by biological nitrification by aerobic treatment of the treated water mixed with the zeolite-filled carrier 2 after the discharge of the sewage / waste water. ; And
The treated water is periodically operated in the order of sludge discharge step (F) or A → B → C → D → F → E to discharge the desorbed sludge to outside after the exhaled treatment,
The zeolite-filled carrier,
A natural or synthetic zeolite having a diameter of 1 to 20 mm is filled into a cube or sphere shape having a diameter of 0.5 to 10 cm of natural or synthetic resin material, and the final specific gravity has a range of 1 to 2,
The flocculant injection / aeration step (C),
At the same time as the inflow of flocculant, the flocculant is mixed, phosphorus intake and backwash of microorganisms cause nitrification reaction and aeration occurs until re-ion exchange of ammonia nitrogen is started.
If the hardly decomposable organic matter and organic nitrogen remains, a continuous batch sewage / wastewater treatment method using a carrier having a zeolite, characterized in that aeration is carried out until the completion of decomposition through advanced oxidation is completed. A sewage / wastewater treatment apparatus comprising a continuous batch reactor (1) filled with a carrier having a zeolite,
Sewage / wastewater inflow step (A) in which the waste / waste water flows into the reactor (1);
Anaerobic / anaerobic condition treatment step (B) to remove nitrogen and organic matter through denitrification and ion exchange reaction in the anaerobic or anaerobic state, the sewage / wastewater introduced into the reaction tank (1);
A flocculant input / aeration step (C) in which a flocculant is introduced into the reaction tank (1) and aerated to mix with the waste / wastewater to remove phosphorus in the anaerobic / anaerobic sewage / wastewater;
Sewage / wastewater discharge (discharge) step is discharged to the outside of the reaction tank (1) through the carrier filling layer is completed the flocculation / aeration flocculation treatment;
Exhaled condition treatment step of regenerating the zeolite by biological nitrification mechanism by exhaling the treated water mixed with the zeolite-impregnated effervescent carrier 2 after the discharge of the sewage / waste water. ); And
The treated water is periodically operated in the order of sludge discharge step (F) or A → B → C → D → F → E to discharge the desorbed sludge to outside after the exhaled treatment,
The foamed carrier impregnated with the zeolite,
It has a hexahedral or spherical shape with a specific gravity of 0.5-3 cm in diameter, in which a natural zeolite having a diameter of 1-5 mm is impregnated into a polymer material made of polyethylene or polyurethane, and having a specific gravity of 0.5-3 cm.
The flocculant injection / aeration step (C),
At the same time as the inflow of flocculant, the flocculant is mixed, phosphorus intake and backwash of microorganisms cause nitrification reaction and aeration occurs until re-ion exchange of ammonia nitrogen is started.
If the hardly decomposable organic matter and organic nitrogen remains, a continuous batch sewage / wastewater treatment method using a carrier having a zeolite, characterized in that aeration is carried out until the completion of decomposition through advanced oxidation is completed. delete

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