KR100561180B1 - A method of treating sewage and high organic loading wastewater by microbial high rate reactor - Google Patents

Abstract

The present invention relates to a method for treating sewage and high concentration organic wastewater using a high rate microbial reaction stirrer, the method for treating high concentration organic wastewater for purifying wastewater, manure and food wastewater, comprising: a contaminant treatment machine (10) and a pumping tank (12). And a pretreatment step (A) of passing through the centrifuge 14 in order to filter out large contaminants in a high concentration of wastewater, and separating sludge-containing solid fines. A first biological treatment step (B) for decomposing nutrients such as nitrogen and high concentrations of organic matter contained in the wastewater having undergone the pretreatment step (A); A second biological treatment step (C) through which the waste water passes through a biological treatment facility in order to decompose organic matter and nitrogen contained in the waste water which has undergone the first biological treatment step (B); A chemical treatment step (D) for passing the waste water through a chemical treatment facility in order to decompose the hardly decomposable substance and chromaticity contained in the wastewater which has undergone the second biological treatment step (C); And a recycling step (E) of recycling the solids separated in the centrifuge (14) of the pretreatment step (A) and the centrifugal dehydrator (28) of the first biological treatment step (B) into compost or feed. It is characterized by including.

Centrifuge, Sludge, Ozone, Wastewater, Manure, Organics

Description

Wastewater and high concentration organic wastewater treatment using high rate microbial reaction stirrer {A METHOD OF TREATING SEWAGE AND HIGH ORGANIC LOADING WASTEWATER BY MICROBIAL HIGH RATE REACTOR}             

1 is a system diagram for the treatment of high concentration organic wastewater according to the present invention.

2 is a process chart of the treatment of high concentration organic wastewater according to an embodiment of the present invention.

Figure 3 is a flow chart of the treatment of high concentration organic wastewater according to another embodiment of the present invention.

4 is a structural diagram of a centrifugal separator of a high concentration organic wastewater treatment apparatus according to the present invention.

5 is a plan view of a high rate microorganism reaction stirrer of the high concentration organic wastewater treatment apparatus according to the present invention.

6 is a longitudinal sectional view of a high rate microbial reaction stirrer of a high concentration organic wastewater treatment apparatus according to the present invention.

* Explanation of symbols on the main parts of the drawing

A: pretreatment step B: first biological treatment step

C: second biological treatment step D: chemical treatment step

E: Resourceization Step

10: dust collector 12: water collector (pumping tank)

14: Centrifuge

121, 122: rotating shaft 123: rotating cylinder

124: transfer screw

125: wastewater 126: contaminant discharge port

127: separation liquid outlet

20: 1st flow adjustment tank

22: high rate microbial reaction stirrer

212 denitrification tank 214 activation tank

216: nitrification tank 2123, 2143, 2163: air inlet hose

2121, 2141, 2161: Submersible Air Pump

220: raw water inlet pipe 230: internal return pipe

240: ejector 250, 250a, 250b: air inlet pipe

260: gas discharge pipe 270: treatment liquid discharge pipe

26: 2nd flow adjusting tank 28: centrifugal concentration dehydrator

30: aeration tank 32: the first settling tank

34: anaerobic tank 36: aerobic tank

37: sedimentation tank 40: chemical flocculation tank

42: second settling degree 44: ozone contact tank

50: Resource equipment

The present invention relates to a method for treating wastewater and high concentration organic wastewater using a high rate microbial reaction stirrer, and more particularly, to efficiently separate solid, liquid and gaseous components from wastewater such as wastewater, manure and food wastewater discharged. The present invention relates to a high-speed treatment method and apparatus for high-concentration organic wastewater for supplying air to a liquid component to enable microorganisms to be used as a liquid ratio and to purify and discharge it sufficiently.

In general, organic wastewater is separated by solid-liquid separation through screen separation, sedimentation, etc., and then discharged after biological treatment combining aerobic treatment, anaerobic treatment, and anoxic treatment.

As described above, the organic wastewater is removed from various organic substances composed of carbon as a constituent of carbon, which is a food source of microorganisms dissolved in the wastewater, as well as nitrogen compounds, phosphorus compounds derived from lipids, etc. resulting from protein decomposition. I would like to.

Hydrocarbons, which are food sources of microorganisms, are relatively easily removed by microorganisms, but nitrogen and phosphorus compounds are not easy to remove, and researches for biologically removing them have been conducted for a long time. In the 1960s, it was confirmed that nitrification and denitrification could be carried out in the first stage of activated sludge process, and biological phosphorus treatment process was removed by biochemical route of microorganism by changing the environmental condition of reactor as well as nitrogen removal. Many treatments have been proposed from the results of the study.

By the way, the microbial treatment method as described above shows a relatively excellent effect on the living sewage generated from the city having a relatively low content of organic nitrogen, but in the case of livestock wastes from rural livestock farms Due to the excessive amount of sludge generated from the sludge, there is a problem that the treatment facility has to be huge due to the increase of nitrogen compounds due to the continuous decomposition of the sludge, and there is a problem that the treatment time is also prolonged, so that it cannot be practically applied.

The removal of biological nitrogen is a method that induces cell synthesis and nitrification and denitrification reactions by the assimilation of microorganisms and converts them into nitrogen gas and removes them. The ammonia nitrogen compound is an assimilation of microorganisms such as nitrosomonas and nitrobacter Is converted to nitrate nitrogen. Nitrogen nitrogen is changed from anoxic state to a nitrogen gas state by an organic carbon source as an electron donor by heterotropes, which are random heterotrophic microorganisms.

A treatment method developed using the principle described above includes a BNR (biological nutrient removal) process, which induces nitrification by maintaining aerobic inside the reactor, and denitrification of nitrified nitrogen under semi-anaerobic conditions. It relies on the arrangement of one aerobic and quasi-anaerobic reactor, and research is based on this BNR process, which includes the Bardenpho process, A / O process, A2 / O process, University of capetown process, and biotechnology. Biodenipho (Biodenipho; Biological denitrification phosphorus) process, BB (Bunnik Bunschoten) process, Carrousel process, Oxidation ditch process, etc. have been developed.

However, although many processes have been developed for the treatment of biological nitrogen as described above, as mentioned above, the facilities for treatment take up a large area or are produced by the mass farming of livestock farms containing a large amount of organic materials. There were still many problems with the treatment of livestock manure.

In addition, although there was an advantage of reducing the time and treatment facilities for treating the high concentration organic wastewater, the throughput of the high concentration organic wastewater treated in the centrifugation and degassing step is not only limited, but also more completely separates the suspended solids in the wastewater. There was not enough to do.

The present invention has been made to solve the above problems, the object of the present invention is to treat high concentration organic wastewater more efficiently to shorten the treatment time and the efficient management of treatment facilities, the organic suspended solids can be recycled as a fertilizer The present invention provides a high-speed treatment method and apparatus for high-concentration organic wastewater which can achieve fundamental purification measures of water resources by establishing an optimal condition to be converted to fertilizer, which is a nutrient of plants, by the fertilizer process.

An object of the present invention as described above, in the method of treating high concentration organic wastewater for purifying wastewater, manure and food wastewater, the high concentration through the contaminant treatment 10, the pumping tank 12 and the centrifuge 14 in order Pretreatment step (A) for filtering the large contaminants from the wastewater and separating the sludge content containing the fine solid suspension; A first biological treatment step (B) for decomposing nutrients such as nitrogen and high concentrations of organic matter contained in the wastewater having undergone the pretreatment step (A); A second biological treatment step (C) through which the waste water passes through a biological treatment facility in order to decompose organic matter and nitrogen contained in the waste water which has undergone the first biological treatment step (B); A chemical treatment step (D) for passing the waste water through a chemical treatment facility in order to decompose the hardly decomposable substance and chromaticity contained in the wastewater which has undergone the second biological treatment step (C); And a recycling step (E) of recycling the solids separated in the centrifuge (14) of the pretreatment step (A) and the centrifugal dehydrator (28) of the first biological treatment step (B) into compost or feed. Wastewater and high concentration organic wastewater treatment method using a high rate microbial reaction agitator, characterized in that it comprises.

Other objects, specific advantages, and novel features of the present invention will become more apparent from the following detailed description of the invention and the preferred embodiments in connection with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the wastewater and high concentration organic wastewater purification method using a high rate microbial reactor according to the present invention will be described in more detail.

1 is a system diagram for the treatment of high concentration organic wastewater according to the present invention. As shown in FIG. 1, the method for treating high concentration organic wastewater according to the present invention includes a pretreatment step (A) for separating a high concentration of wastewater from a relatively large contaminant and a relatively fine solid suspension, and a high concentration after the pretreatment step (A). The first biological treatment step (B) of purifying organic matter and nitrogen, phosphorus and other nutrients, and the second biological treatment of purifying nutrients such as nitrogen and phosphorus, a small amount of organic material remaining after the first biological treatment step (B) Step (C), the chemical treatment step (D) for treating the biodegradable organic matter and chromaticity, etc. remaining after the second biological treatment step (C), and the centrifuge of the pretreatment step (A) ( 14) and a recycling step (E) for recycling the solids separated in the centrifugal dehydrator 28 of the first biological treatment step (B) into compost or feed.

2 is a process flow chart of a high concentration organic wastewater in accordance with an embodiment of the present invention, Figure 3 is a process flow chart of a high concentration organic wastewater in accordance with another embodiment of the present invention. As shown in FIG. 2, the pretreatment step (A) includes a contaminant treatment unit 10 for filtering relatively large contaminants from the wastewater, and a pumping tank 12 for collecting and pumping some of the wastewater filtered by the contaminant treatment unit 10. And a centrifuge 14 for rotating the wastewater and centrifuging the relatively small contaminants.

The contaminant handler 10 filters out relatively bulky contaminants contained in wastewater, such as manure, nutrients, livestock wastewater, and domestic wastewater, which are introduced from the outside as a known apparatus. In addition, the pumping tank 12 is provided to collect and pump wastewater from which some of the large contaminants are filtered out in the contaminant processor 10.

In addition, the centrifuge 14 is rotated at a high speed to form a centrifugal force field to settle the contaminants having a greater specific gravity than the waste water therein, and at the same time transfer the discharged sediment to the discharge port, and flows the separated waste water to the contrary It is a device to send. 4 is a structural diagram of a centrifugal separator of a high concentration organic wastewater treatment apparatus according to the present invention. The excess sludge and solids recovered in the centrifuge (14) is moved to the recycling facility 50 is recycled.

As shown in FIG. 4, the centrifuge 14, which is a high-speed treatment device for high concentration organic wastewater of the present invention, has a rotary cylinder (inside the case 120) around the rotating shafts 121 and 122 on both sides thereof by a driving means. 123 is rotated at a high speed, and the transfer screw 124 is formed to be rotatable coaxially therein.

In addition, the rotary cylinder 123 is a wastewater supply pipe 125 for supplying the wastewater filtered out a relatively large contaminant is located at the end side, the external wastewater is introduced into the transfer screw 124, this wastewater injected As the centrifugal force by the high-speed rotation of the transfer screw 124 is placed on the inner wall of the rotary cylinder 123 in the order of high specific gravity, solid-liquid separation is made in a stacked form.

At this time, through the holes (not shown) formed in the front side of the rotary tube 123, the contaminants of the waste water exits to the contaminant outlet 126 of the case 120. In addition, the relatively clear and clean supernatant of the waste water is transferred in the rotary cylinder 123 by the transfer screw 124 and the separation liquid discharge port 127 formed at the end of the case 120 through the holes of the rotary cylinder 123. To be discharged.

In addition, the separation liquid of the wastewater discharged through the separation liquid outlet 127 is dispersed in the atomization state by the centrifugal force by the high-speed rotation of the rotary cylinder 123, the gas having an ammonia nitrogen component contained in the separation liquid Degassing from the separation solution will occur.

In addition, the small-scale treatment plant is configured to perform the concentration of activated sludge treated in the high-rate microbial reaction stirrer 22 to be described later to adjust the water quality of the process by supplying the drug free medicine or drug water according to the process water quality.

The first biological treatment step (B) is a high flow rate microorganism reaction stirrer 22 for reacting wastewater from the pretreatment step A with the first flow rate adjusting tank 20 and activating the microorganisms inside the wastewater with oxygen. It consists of a second flow rate adjustment tank 23 for storing the wastewater activated microorganisms and a centrifugal concentration dehydrator 28 for separating the fine sludge from the wastewater activated microorganisms. Surplus sludge and solids recovered in the centrifugal condensate dehydrator 28 is moved to the recycling facility 50 is recycled.

The first flow rate adjustment tank 20 is provided to store the wastewater and stably supply the wastewater to the high rate microbial reaction stirrer. Wastewater stored in the first flow adjustment tank 20 is supplied to the microbial reaction stirrer 22 continuously or intermittently.

5 is a plan view of a high rate microbial reaction stirrer of a high concentration organic wastewater treatment apparatus according to the present invention, and FIG. 6 is a longitudinal sectional view of a high rate microbial reaction stirrer of a high concentration organic wastewater treatment apparatus according to the present invention.

Waste water supplied to the microorganism reaction stirrer 22 is treated through the denitrification tank 212, the activation tank 214, the nitrification tank 216 through the raw water inlet pipe 220 of FIG. 6, and discharged to the outside. The portion of is transferred internally from the nitrification tank 216 to the denitrification tank 212. The air is introduced into each reactor through the ejector 240 and the air inlet hoses 2123, 2143, and 2163 using the underwater air pumps 2121, 2141, and 2161 for a predetermined time to decompose organic matter and nitrify the ammonia nitrogen. Let's do it. In FIG. 6, the ignition arrow shows a path in which the treated water is moved.

After a certain period of time, the inflow of the denitrification tank 212 is blocked, and then the inside is stirred using a submersible air pump to nitrify the nitric acid, which is transported inside, and denitrify using organic materials in the incoming raw water. After denitrification, air is introduced again and the process is repeated for a certain time.

In addition, sludge discharge ports 2125 and 2165 for discharging sludge are formed at the lower portions of the denitrification reaction tank 212 and the nitrification reaction tank 216.

The wastewater treated in the high rate microbial reaction stirrer 22 is discharged through the second biological treatment step (C) and the chemical treatment step (D) as shown in FIGS. 2 and 3. The aeration tank 30, the settling tank 32 shown in FIG. 2, or the anaerobic tank 34, the anaerobic tank 35, the aerobic tank 36 and the settling tank 37 shown in FIG. 3 represents a preferred embodiment of the second biological treatment step. To show.

The aeration tank 30 supplies air by a known technique and removes organic substances using aerobic microorganisms, and the first precipitation tank 32 separates the treated water and sludge treated in the aeration tank 30 through the precipitation action. Facility.

In addition, anaerobic tank 34, anoxic tank 35, aerobic tank 36, precipitation tank 37 is a technique for removing nitrogen and phosphorus in addition to the organic material. The anaerobic tank 34 does not supply air so that the microorganisms adsorb the phosphorus to remove the phosphorus, and in the anoxic tank 35, the oxygen is not supplied to convert nitrogen nitrated in the aerobic tank 36 to nitrogen gas using the microorganism. Remove nitrogen. The aerobic tank 36 supplies oxygen to convert organic matter and convert ammonia nitrogen to nitrate nitrogen, and return some treated water to the anaerobic tank 34 or the anoxic tank 35. The settling tank 37 is a facility for separating the treated water and sludge treated in the aerobic tank 36 through the settling action.

In the second biological treatment step (C), nutrients such as nitrogen and organic substances remaining in the wastewater discharged after the treatment in the high-rate microbial reaction stirrer 22 are removed. The chemical flocculation tank 40, the second precipitation tank 42 and the ozone contact tank 44 shown in FIG. 3 show a preferred embodiment of the chemical treatment step (D).

The chemical coagulation tank 40 is a technique for coagulating a hardly decomposable substance and various contaminants by using an inorganic coagulant or an organic coagulant by known techniques, and treating the aggregate and the treated water by sedimentation and separation in the second precipitation tank 42. An alternative to this chemical coagulation technique is the ozone contact tank 44, which is a technique for treating hardly decomposable substances and various pollutants by injecting oxidizing ozone into the wastewater.

The sludge discharged from the second settling tank 42 is dewatered and caked. The chemical treatment step (D) serves to remove nutrients such as hardly decomposable substances and chromaticity remaining in the wastewater discharged after the treatment in the second biological treatment step.

As shown in FIG. 2 and FIG. 3, the overall movement with respect to the air flow, the conveyance of excess sludge, the conveyance of solids, and the conveyance of other wastewater is indicated by arrows.

The solids separated in the centrifuge 14 and the centrifugal dehydrator 28 are transferred to the recycling facility 50 as shown in FIG. 2 or FIG. 3. The recycling facility 50 is a known device to control the water and carbon ratio (C / N ratio) of the solids separated from the livestock wastewater, for example, by using microorganisms to decompose the heterogeneous organic matter, remove various harmful substances and fungi Produce high quality compost or land improvers. In another example, solids separated from food wastewater are aged to produce feed.

Wastewater and high concentration organic wastewater treatment method using a high rate microbial reaction agitator according to the present invention as described above According to the present invention, it is possible to efficiently separate organic wastewater, shorten the treatment time and efficiently manage the treatment facility, By supplying air to activate the microorganisms can be used as a liquid ratio, and also has an excellent purification effect.                     

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims include such modifications and variations as fall within the spirit of the invention.

Claims (8)

In the treatment method of high concentration organic wastewater which purifies animal wastewater, manure and food wastewater, A pretreatment step (A) for filtering the large contaminants from the wastewater of high concentration by passing through the contaminant treatment unit 10, the pumping tank 12, and the centrifuge 14 in order to separate the sludge-containing solid fines; A first biological treatment step (B) of decomposing high concentrations of nutrients contained in the wastewater which has been subjected to the pretreatment step (A) using a high rate microbial reaction stirrer; A second biological treatment step (C) through which the waste water passes through a biological treatment facility to decompose organic matter and nitrogen contained in the waste water which has undergone the first biological treatment step (B); A chemical treatment step (D) in which the wastewater passes through a chemical treatment facility in order to decompose the hardly decomposable substance and chromaticity contained in the wastewater which has undergone the second biological treatment step (C); And A recycling step (E) for recycling the solids separated in the centrifuge 14 of the pretreatment step (A) and the centrifugal dehydrator 28 of the first biological treatment step (B) into compost or feed; Wastewater and high concentration organic wastewater treatment method using a high rate microorganism reaction stirrer, characterized in that. The method of claim 1, wherein the pre-treatment step (A) rotates the contaminant treatment unit (10) for filtering large contaminants, the sump (12) for collecting and pumping the wastewater filtered by the contaminant treatment unit (10), and rotating the waste water. Wastewater and high concentration organic wastewater treatment method using a high rate microbial reaction agitator, characterized in that it comprises a centrifuge (14) for centrifuging small contaminants. According to claim 1, wherein the first biological treatment step (B) is a wastewater from the pre-treatment step (A) to filter the wastewater in the first flow rate adjustment tank 20, the wastewater reacts with oxygen and wastewater by using microorganisms inside High flow rate microorganism reaction stirrer 22 to purify, second flow rate adjusting tank 26 to store the discharged water treated in high rate microorganism reaction stirrer 22 and centrifugal concentrated dehydrator for separating sludge from effluent mixed with microorganisms and treated water ( Wastewater and high concentration organic wastewater treatment method using a high rate microbial reaction agitator, characterized in that it comprises a 28). The method of claim 1, wherein the second biological treatment step (C), An aeration tank 30 for supplying air and removing organic substances using aerobic microorganisms; And Wastewater and high concentration organic wastewater treatment using a high rate microbial reaction stirrer, characterized in that the wastewater is treated in the order of the first sedimentation tank (32) for separating the treated water and sludge treated in the aeration tank 30 through the precipitation action Way. The method of claim 1, wherein the second biological treatment step (C), An anaerobic tank 34 which adsorbs phosphorus using microorganisms; Oxygen-free tank 35 for removing nitrogen by converting nitrogen nitrated in the aerobic tank 36 to nitrogen gas using a microorganism; An aerobic tank 36 for supplying oxygen to decompose organic substances and convert ammonia nitrogen to nitrate nitrogen; And Wastewater and high concentration organic wastewater treatment method using a high rate microbial reaction agitator, characterized in that the wastewater is treated through a settling tank (37) for separating the treated water and sludge treated in the aerobic tank (36). The method of claim 1, wherein the chemical treatment step (D), A chemical coagulation bath 40 for coagulating the hardly decomposable substance using an inorganic coagulant or an organic coagulant; And Wastewater and high concentration organic wastewater treatment method using a high rate microbial reaction agitator, characterized in that the wastewater is treated through the sequence of the second settling tank (42) for separating the aggregate and the treated water. The method of claim 1, wherein the chemical treatment step (D) comprises an ozone contact tank 44 for injecting ozone into the wastewater through an ozone generator. . According to claim 3, The high rate microbial reaction stirrer 22, a plurality of reaction tanks including a denitrification reaction tank 212, the activation tank 214, and the nitrification reaction tank 216 are connected in a horizontal direction to contaminate Microbial reaction stirrer 210 for contacting the microorganisms with; Raw water inlet pipe 220 for supplying waste water to the upper portion of the denitrification tank 212; An inner conveying pipe 230 for returning wastewater inside the nitrification tank 216 to the denitrification tank 212; An ejector (40) installed between the raw water inlet pipe (220) and the denitrification reactor (212) to maximize oxygen dissolution efficiency; Air inlet pipes 250, 250a, and 250b for supplying air into the microbial reaction stirrer 210, respectively; Gas discharge pipe 260 for discharging gas to the top of the plurality of reaction tanks (212, 214, 216), respectively; A treatment liquid discharge pipe 270 integrally connected to one side of the gas discharge pipe 260 and the nitrification reaction tank 216 to discharge the purified wastewater treatment liquid; And Wastewater and high concentration organic wastewater treatment method using a high rate microbial reaction stirrer comprising a; submersible air pump (2121, 2141, 2161) respectively installed in the lower portion of the plurality of reaction tanks (212, 214, 216).

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