CN216550017U - Complete equipment for treating dispersed high-concentration organic wastewater - Google Patents
Complete equipment for treating dispersed high-concentration organic wastewater Download PDFInfo
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- CN216550017U CN216550017U CN202122550741.5U CN202122550741U CN216550017U CN 216550017 U CN216550017 U CN 216550017U CN 202122550741 U CN202122550741 U CN 202122550741U CN 216550017 U CN216550017 U CN 216550017U
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Abstract
A complete set of device for treating dispersed high-concentration organic wastewater belongs to the technical field of environmental protection equipment. The complete equipment is including the pretreatment module, two-stage AO reaction module and the membrane treatment module that connect in order, the membrane treatment module is air-lift MBR membrane bioreactor, the one-level oxygen deficiency pond of two-stage AO reaction module is connected to air-lift MBR membrane bioreactor's return line, set up the backwash pump on this return line, air-lift MBR membrane bioreactor still connects the aeration pipeline, air-lift MBR membrane bioreactor's play water piping connection clean water basin, set up the sterilizer disinfection on going out the water piping, the clear water after optimizing the disinfection flows in the clean water basin, mud pipe connection sludge impoundment. The utility model has the advantages of high working efficiency, stable and reliable technology and convenient operation in small-scale distributed high-concentration organic wastewater treatment projects, and can meet the standard discharge of sewage.
Description
Technical Field
The utility model belongs to the technical field of environmental protection, and particularly relates to a complete set of device for treating dispersed high-concentration organic wastewater.
Background
The method aims to solve the problems of serious pollution of high-concentration organic pollutants such as agricultural and sideline product processing points in Shenyang city, livestock and poultry farms, garbage leachate in urban and rural garbage stations and the problems of large occupied area for treating domestic sewage and sludge, difficult operation and maintenance and the like which are not brought into vacation villages, construction sites, highway service stations, army barracks and rural residential points of municipal pipe networks, and realize the whole-process efficient treatment and resource recycling of dispersed high-concentration organic wastewater.
With the high-speed development of livestock and poultry breeding scale, the brought environmental problems are increasingly serious, intensive livestock and poultry breeding cannot avoid the concentrated production of a large amount of pollutants such as excrement, the emission density of the pollutants such as livestock and poultry excrement is increased, the surrounding environment is seriously influenced, the sustainable development of social economy is restricted, the ecological safety of the country is endangered, the sewage organic matter content of small-scale livestock and poultry farms is high, the dispersing and transferring cost is high, the construction and running cost of sewage treatment facilities is high, the management difficulty is large, and the like.
Disclosure of Invention
Aiming at the characteristics of small-scale distributed sewage treatment, the utility model solves the technical problems of high construction and operation cost and high management difficulty of distributed sewage treatment, and provides a complete set of distributed high-concentration organic wastewater treatment equipment which has high working efficiency, simple equipment and convenient operation, and is suitable for small-scale agricultural and sideline product processing points, livestock and poultry farm sewage treatment projects and the like.
The purpose of the utility model is realized by the following technical scheme:
the utility model relates to a complete set of distributed high-concentration organic wastewater treatment device, which comprises a pretreatment module, two stages of AO reaction modules and a membrane treatment module which are connected in sequence, wherein the membrane treatment module is an air-lift MBR (membrane bioreactor), a return pipeline of the air-lift MBR membrane bioreactor is connected with a first-stage anoxic tank of the two stages of AO reaction modules, a return pump is arranged on the return pipeline, the air-lift MBR membrane bioreactor is also connected with an aeration pipeline, a water outlet pipeline of the air-lift MBR membrane bioreactor is connected with a clean water tank, a water outlet pipeline is provided with a disinfector for disinfection, the clean water after optimized disinfection flows into the clean water tank, and a sludge pipeline is connected with a sludge tank.
Furthermore, the airlift MBR membrane bioreactor comprises a reaction tank, and a membrane module and a partition board which are arranged in the reaction tank, wherein activated sludge for removing pollutants in water is filled in the space in the reaction tank, aerobic, anoxic and anaerobic zones are formed from top to bottom, the partition boards are arranged on two sides of the membrane module in the reaction tank, the distance L1 between each partition board and two side ends of the membrane module is 25-35cm, the distance between the upper end of each partition board and the upper edge L2 of the same membrane module is 35-45cm, the distance L3 between the lower end of each partition board and the bottom of the tank is 20-25m, a chimney effect is formed, the reaction tank is connected with a primary anoxic tank through a sludge return pipeline, and a sludge return pump is arranged on a sludge return pipeline, so that sludge flows back to the primary anoxic tank through a return pipe under the action of the sludge return pump.
Further, the pretreatment module comprises a rotary grating machine, an oil separation regulating tank and a cloth bag filter which are sequentially connected, wherein the rotary grating machine is used for primary filtration, an oil separation felt is arranged in the oil separation regulating tank and is vertically arranged in two layers, the interval between the two layers is 450-inch thick, the oil separation treatment is carried out on filtrate, and finally, the cloth bag filter is used for carrying out fine filtration on the wastewater so as to remove particles in the wastewater, so that the pretreatment module of the rotary grating dirt separator, the oil separation and the cloth bag filter is formed; the rotary grating machine, the oil separation regulating tank and the cloth bag filter are respectively connected with the slag tank to collect generated slag.
Furthermore, a primary sewage lifting pump is arranged on a pipeline between the rotary grating machine and the oil separation regulating tank, and sewage filtered by the rotary grating machine is lifted into the oil separation regulating tank through the primary sewage lifting pump; a second-stage sewage lifting pump is arranged on a pipeline between the oil separation regulating tank and the cloth bag filter, and sewage filtered by the oil separation regulating tank is lifted into the cloth bag filter by the second-stage sewage lifting pump to remove particles with the particle size of more than 0.5-100 mu m; the oil removal regulating reservoir is connected with an aeration pipeline.
Further, a water inlet pipe of the oil separation regulating tank is connected with a carbon source supplementing pipeline; the oil removal regulating reservoir is also connected with an aeration pipeline.
Further, the two-stage AO reaction module comprises an LEM advanced oxidation tank, a flocculation sedimentation tank, a first-stage anoxic tank, a first-stage aerobic tank, a second-stage anoxic tank and a second-stage aerobic tank which are connected in sequence, wherein a first-stage anaerobic denitrification reaction is carried out in the first-stage anoxic tank, then the first-stage anoxic tank enters the first-stage aerobic tank to carry out a first-stage aerobic nitrification reaction, and the LEM advanced oxidation tank, the first-stage aerobic tank and the second-stage aerobic tank are respectively connected with an aeration pipeline to carry out aeration treatment; the primary aerobic tank is connected with the primary anoxic tank through a reflux pump, the primary aerobic tank is connected with the primary anoxic tank through a reflux pipeline, the reflux pipeline is provided with the reflux pump, and nitrifying liquid in the primary aerobic tank flows back to the primary anoxic tank through the reflux pump; the effluent in the first-stage aerobic tank flows into the second-stage anoxic tank to carry out second-stage denitrification reaction, and then enters the second-stage aerobic tank.
Further, the advanced oxidation pond comprises a pH adjusting pond, an LEM-DF reaction pond and a flocculation sedimentation pond which are connected in sequence, the advanced oxidation pond is connected with an aeration pipeline, firstly, sewage enters the pH adjusting pond to be adjusted, so that the pH value meets the reaction condition of LEM-DF, then enters the LEM-DF reaction pond to be electrochemically oxidized, effluent is discharged in the flocculation sedimentation pond, when the pH value is controlled to be 7.5-8.5, a flocculating agent is added for sedimentation, the flocculation sedimentation is connected with a sludge pond, and supernatant is connected with a primary anoxic pond to perform next biochemical reaction.
Further, the secondary anoxic tank is connected with a carbon source supplementing pipeline.
The utility model has the beneficial effects that:
1. the utility model relates to a complete set of distributed high-concentration organic wastewater treatment device, which comprises a pretreatment module, two stages of AO reaction modules and a membrane treatment module which are connected in sequence, wherein the membrane treatment module is an airlift MBR membrane bioreactor, a first-stage anoxic tank of the two stages of AO reaction modules is connected with a return pipeline, the anoxic tank is connected with an aeration pipeline, a water outlet pipeline of the anoxic tank is connected with a clean water tank, a disinfector is arranged on the water outlet pipeline for disinfection, the clean water after optimized disinfection flows into the clean water tank, and a sludge pipeline is connected with a sludge tank. The utility model has the advantages of high working efficiency, stable and reliable technology and convenient operation in small-scale distributed high-concentration organic wastewater treatment projects, and can meet the standard discharge of sewage.
2. The air-lift MBR membrane bioreactor comprises a membrane component and a partition board which are arranged in a reaction tank, wherein activated sludge for removing pollutants in water is filled in the space in the reaction tank, aerobic, anoxic and anaerobic zones are formed from top to bottom, the removal of nitrogen and phosphorus is realized, the partition board is arranged on two sides of the membrane component in the reaction tank, and the distance between the partition board and the membrane component is set, so that a chimney effect is formed in the reaction tank, the mixed flow velocity of gas and water is enhanced, and three functions of oxygen flushing, flushing and liquid circulation are realized; the reaction tank is connected with the first-stage anoxic tank through a sludge return pipeline, so that sludge flows back to the first-stage anoxic tank through a return pipe under the action of a sludge return pump to perform denitrification reaction.
3. The pretreatment module comprises a rotary grating machine, an oil separation regulating tank and a cloth bag filter which are connected in sequence, wherein the rotary grating machine is used for primary filtration, an oil separation felt is arranged in the oil separation regulating tank, filtrate is subjected to oil separation treatment, and finally, wastewater is subjected to fine filtration through the cloth bag filter so as to remove particles in the wastewater, so that the pretreatment module of the rotary grating dirt remover, the oil separation and the cloth bag filter is formed; the rotary grating machine, the oil separation regulating tank and the cloth bag filter are respectively connected with the slag tank to collect generated slag. The oil removal adjusting tank is connected with an aeration pipeline, and sewage is fully mixed through aeration to play a role in adjusting water quality.
4. The two-stage AO reaction module comprises an LEM advanced oxidation tank, a flocculation sedimentation tank, a first-stage anoxic tank, a first-stage aerobic tank, a second-stage anoxic tank and a second-stage aerobic tank which are connected in sequence, supernatant liquid of wastewater treated by the second-stage aerobic tank finally enters an airlift MBR for membrane biochemical treatment of sewage, and sediment enters a sludge tank to complete two-stage AO reaction. And (4) disinfecting the clean water treated by the air-lift MBR membrane bioreactor, and then feeding the disinfected clean water into a clean water tank to finish the treatment of the wastewater.
Drawings
FIG. 1 is a process flow diagram of a complete distributed high-concentration organic wastewater treatment plant according to the utility model.
FIG. 2 is a flow diagram of the advanced oxidation cell process of the present invention.
Fig. 3 is a floor plan of fig. 2.
FIG. 4 is a schematic view of the working principle of the airlift MBR membrane bioreactor of the present invention.
In the figure: the device comprises a PH adjusting tank, 2 water inlet pipes, 3 settling tanks, 4 water outlet pipes, 5 sludge outlets, 6 PAM dosers, 7 PAC dosers, 8 LEM-DF reaction tanks, 9 acid dosers, 10 alkali dosers, 11 partition plates, 12 aeration pipes, 13 sludge blocks, 14 bubbles, 15 aerobic zones, 16 anoxic zones, 17 anaerobic zones and 18 membrane modules.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1: as shown in figure 1, the complete equipment for dispersed high-concentration organic wastewater treatment comprises a pretreatment module, a two-stage AO reaction module and a membrane treatment module which are connected in sequence, wherein the membrane treatment module is an airlift MBR membrane bioreactor as shown in figure 4; a return pipeline of the air-lift MBR membrane bioreactor is connected with a first-stage anoxic tank of two-stage AO reaction modules, a return pump is arranged on the return pipeline, the air-lift MBR membrane bioreactor is also connected with an aeration pipeline, a water outlet pipeline of the air-lift MBR membrane bioreactor is connected with a clean water tank, a sterilizer is arranged on the water outlet pipeline for sterilization, the clean water after optimized sterilization flows into the clean water tank, and a sludge pipeline is connected with a sludge tank.
1) Pre-processing module
Aiming at the characteristics of dispersed high-concentration organic wastewater treatment, the wastewater of a septic tank of an actual pig farm is taken for water quality analysis to obtain: the pig farm wastewater has high COD, high ammonia nitrogen, high SS and low animal and vegetable oil. The pretreatment module comprises a rotary grating machine, an oil separation regulating tank and a cloth bag filter which are connected in sequence, wherein the rotary grating machine is used for primary filtration, an oil separation felt is arranged in the oil separation regulating tank and is vertically arranged in two layers, the distance between the two layers is 500cm, filtrate is subjected to oil separation treatment, and finally, wastewater is subjected to fine filtration through the cloth bag filter so as to remove particles in the wastewater, ensure the normal operation of the subsequent membrane treatment process, and form the pretreatment module of 'rotary grating dirt separator + oil separation + cloth bag filter'; the rotary grating machine, the oil separation regulating tank and the cloth bag filter are respectively connected with the slag tank to collect generated slag.
A primary sewage lifting pump is arranged on a pipeline between the rotary grating machine and the oil separation regulating tank, and sewage filtered by the rotary grating machine is lifted into the oil separation regulating tank through the primary sewage lifting pump; the retention time of the sewage in the oil removal regulating tank is 20-24 h; a second-stage sewage lifting pump is arranged on a pipeline between the oil separation regulating tank and the cloth bag filter, and sewage filtered by the oil separation regulating tank is lifted into the cloth bag filter by the second-stage sewage lifting pump to remove particles with the particle size of more than 0.5-100 mu m; the oil removal adjusting tank is connected with an aeration pipeline, and sewage is fully mixed through aeration to play a role in adjusting water quality.
The water inlet pipe of the oil separation regulating tank is connected with a carbon source supplementing pipeline; the oil removal regulating reservoir is also connected with an aeration pipeline.
2) Module for carrying out two-stage AO reaction
The method comprises an LEM advanced oxidation tank, a flocculation sedimentation tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank and a secondary aerobic tank which are connected in sequence, wherein primary anaerobic denitrification reaction is performed in the primary anoxic tank, and then the primary anoxic tank enters the primary aerobic tank to perform primary aerobic nitrification reaction; the first-level aerobic tank is connected with the first-level anoxic tank through a reflux pump, the first-level aerobic tank is connected with the first-level anoxic tank through a reflux pipeline, the reflux pipeline is provided with the reflux pump, the nitrifying liquid in the first-level anoxic tank flows back to the first-level anoxic tank through the reflux pump, and the reflux ratio is about 200 plus 300%; the effluent in the first-stage aerobic tank flows into the second-stage anoxic tank to carry out second-stage denitrification reaction, and then enters the second-stage aerobic tank.
As shown in fig. 2 and fig. 3, the advanced oxidation pond comprises a pH adjusting pond 1, an LEM-DF reaction pond 8 and a flocculation sedimentation pond 3 which are connected in sequence, and the advanced oxidation pond is connected with an aeration pipeline. Firstly, sewage enters a PH adjusting tank 1 for adjustment, the PH value is controlled to be 2.5-3, the reaction condition of LEM-DF is met, then the sewage flows into an LEM-DF reaction tank 8 for electrochemical oxidation, LEM oxidant is used, wherein the iron content of LEM (oxidant) is 75%, the catalyst amount is 5%, the carbon content is 5-15%, the porosity is not less than 65%, the particle strength is not less than 600kgf/cm2, the sewage is used as electrolyte for electrolytic treatment, part of COD (reduced by about 40%) is degraded, the biodegradability of the sewage is improved, DF is hydrogen peroxide, effluent is in a flocculation sedimentation tank 3, when the PH value is controlled to be 7.5-8.5, a flocculating agent (PAC \ PAM) is added for sedimentation, the flocculation sedimentation is connected with a sludge tank, and supernatant automatically flows into a primary anoxic tank for next biochemical reaction.
Then, the supernatant is subjected to primary anaerobic denitrification reaction in a primary anoxic tank, then enters a primary aerobic tank for primary aerobic nitrification reaction, and is subjected to aeration treatment in the primary aerobic tank; the nitrifying liquid in the first-stage aerobic tank flows back to the first-stage anoxic tank through a reflux pump, and the reflux ratio is 200-300%. And the effluent enters a secondary anoxic tank for secondary anaerobic denitrification reaction, finally enters a secondary aerobic tank for secondary aerobic nitrification reaction, and is subjected to aeration treatment in the secondary aerobic tank.
The secondary anoxic tank is connected with a carbon source supplementing pipeline, the denitrification rate is reduced when the carbon source supply in the denitrification process is insufficient in the denitrification process of sewage in the secondary anoxic tank, and the carbon source supplementing can improve the denitrification rate.
3) Membrane treatment module
Through researching the membrane module and the reactor structure, the optimized height-diameter ratio is 5, the circulating flow rate can be increased by properly optimizing the height-diameter ratio, the reaction efficiency of the reactor is improved by 20-25%, an airlift MBR membrane bioreactor structure is formed, and decentralized high-concentration organic wastewater treatment equipment taking pretreatment plus two-stage AO plus airlift MBR as a main process is formed by combining the wastewater quality condition of a pig farm.
As shown in fig. 4, the air-lift MBR membrane bioreactor comprises a reaction tank, a membrane module 18 and a partition plate 11, wherein the membrane module 18 and the partition plate 11 are arranged in the reaction tank, activated sludge for removing pollutants in water is filled in the space in the reaction tank, an aerobic zone 15, an anoxic zone 16 and an anaerobic zone 17 are formed from top to bottom, the partition plate 11 is arranged on each of two sides of the membrane module 18 in the reaction tank, the distance L1 between the partition plate 11 and two sides of the membrane module 18 is 25-35cm, the distance between the upper end of the partition plate 11 and the upper edge L2 of the same membrane module 18 is 35-45cm, the distance L3 between the lower end of the partition plate 11 and the tank bottom is 20-25cm, a chimney effect is formed, the reaction tank is connected with a primary anoxic tank through a sludge return pipeline, and a sludge return pump is arranged on a sludge return pipeline, so that sludge flows back into the primary anoxic tank through a return pipe under the effect of the sludge return pump.
The membrane module is an existing outsourcing component and consists of a water collecting pipe, a water outlet pipe, an air inlet pipe, an air outlet pipe, a hollow fiber membrane and an inner aeration pipe, most pollutants in sewage in the secondary oxidation pond enter the airlift MBR membrane reactor through the water collecting pipe are removed by activated sludge in mixed liquid, the sewage passes through the hollow fiber membrane in the membrane module to achieve the process of separating mud from water, the sludge is isolated at the outer side of the membrane, and purified water is obtained from a water outlet by utilizing the negative pressure suction force of a vacuum pump; the water collecting pipe, the water outlet pipe and the air inlet pipe of the membrane component support the membrane filaments, and an aeration pipe is arranged in the membrane component, the air quantity of the aeration pipe is from an air blower, and the aeration pipe is aerated through the air inlet pipe, so that the membrane filaments are ensured to be fully shaken, and the air-water scrubbing effect is enhanced; the activated sludge of the airlift MBR membrane reactor is arranged in aerobic, anoxic and anaerobic areas to remove pollutants in water and relieve the problems of membrane blockage and membrane pollution, and purified water is obtained by membrane separation; the two sides of the membrane component 18 are provided with the partition boards 11, the distance L1 between the partition boards and the two sides of the membrane component is 30cm, the distance L2 between the upper edge of each partition board and the upper edge of the same membrane component is 40cm, and the distance L3 between the lower edge of each partition board and the bottom of the tank is 20cm, so that internal circulation is accelerated, a chimney effect is formed, the mixed flow rate of gas and water is enhanced, and three functions of oxygen flushing, flushing and liquid circulation are realized; an aerobic zone, an anoxic zone and an anaerobic zone are formed in the reactor simultaneously to remove nitrogen and phosphorus, and sludge reflows to the first-stage anoxic tank through the backflow pipe under the action of the sludge backflow pump.
The working process and the working principle of the utility model are as follows:
the embodiment is used for treating wastewater in a certain pig farm, and the design scale is as follows: 0.4m3/h。
In the pretreatment module, the sewage is lifted to a rotary grating machine through a first sewage lifting pump, the sewage is preliminarily filtered, the SS with the particle size of more than 0.1-0.5mm is removed, and the treatment capacity is 0.5m3The power is 0.75kw, the sewage filtered by the rotary grating machine is lifted to an oil separation regulating tank by a second sewage lifting pump, an oil separation felt is arranged in the oil separation regulating tank, the two layers of sewage are vertically arranged, the distance between the two layers is 500cm, the oil separation felt is used for adsorbing oil substances in the sewage, the thickness of the oil separation felt is 5mm, and the oil absorption is 3.5L/m2The water quality and the water quantity are mixed through an oil separation regulating tank, oil substances in sewage are removed, and the flow rate is 0.5m3H is 5m, the power is 0.37kw, the sewage retention time is 20H, and the effective volume is 4m3(ii) a The filtered sewage is lifted to a cloth bag filter by a third sewage lifting pump, and the flow rate is 0.5m3H, the power is 0.37kw, the sewage is further filtered, and the particles with the particle size of more than 0.5-100 μm are removed; the grid slag filtered by the rotary grid machine, the oil separation regulating tank and the cloth bag filter all enters the slag tank.
The sewage filtered by the cloth bag filter enters an LEM advanced oxidation tank in a two-stage AO reaction module, and the inside of the LEM advanced oxidation tank is divided into four areas: pH adjustment, an LEM, DF, a flocculation sedimentation tank, wherein the total retention time of sewage is 15h, aeration is filled in an LEM advanced oxidation tank, oxygen is provided through aeration, the reaction effect is enhanced, and electrochemical oxidation is carried out in the LEM-DF advanced oxidation tank, so that the electrochemical degradation of organic matters in the wastewater is realized; and (3) when the effluent is in a flocculation sedimentation tank and the pH value is controlled to be 7.5-8.5, adding a flocculating agent (PAC \ PAM) for reaction, settling, automatically flowing the supernatant into a first-stage anoxic tank for next biochemical reaction, and flowing the flocculation sedimentation into a sludge tank.
The supernatant after the flocculation sedimentation tank treatment enters a primary anoxic tank for biochemical treatment, the retention time of sewage in the primary anoxic tank is 22.5h, a stirrer is arranged in the primary anoxic tank, and the effective volume is 9m3The sewage in the first-stage anoxic tank is subjected to full denitrification reaction without reaction dead angles; the sewage treated by the primary anoxic tank enters a primary aerobic tank for primary aerobic nitrification reaction, the primary aerobic tank is aerated to provide oxygen through aeration for full biochemical reaction, so that the BOD of organic pollutants is degraded, the nitrified liquid in the primary aerobic tank flows back to the primary anoxic tank through a return pipeline and a return pump on the return pipeline, and the flow rate of the return pump is 1m3H, power of 0.37kw, and effective volume of 9m of first-stage aerobic tank3The sewage stays for 22.5 hours; the effluent after the treatment of the first-stage aerobic tank enters a second-stage anoxic tank, a stirrer is arranged in the second-stage anoxic tank, so that the sewage in the anoxic tank is subjected to full denitrification reaction without reaction dead angles, a carbon source is supplemented, the carbon-nitrogen ratio of the sewage is balanced, the reaction effect is increased, and the effective volume is 9m3The sewage stays for 22.5 hours, the sewage treated by the secondary anoxic tank enters a secondary aerobic tank, aeration is carried out, oxygen is provided by aeration, sufficient biochemical reaction is carried out, the BOD of organic pollutants is degraded, and the effective volume of the secondary aerobic tank is 9m3The sewage stays for 22.5 hours;
the specific reaction principle is as follows: in the aerobic section of the sewage, organic matters (BOD5) are oxidized and decomposed by aerobic microorganisms, organic nitrogen is converted into nitrate-state ammonia through ammoniation and nitrification, the nitrate-state ammonia flows back into the anoxic section through sludge, DO in the section A is not more than 0.2mg/L, and DO in the section O is 2-4 mg/L. The heterotrophic bacteria hydrolyze starch, fiber, carbohydrate and other suspended pollutants and soluble organic matters in the sewage into organic acid at an anoxic section, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, and when products after anoxic hydrolysis enter an aerobic tank for aerobic treatment, the biodegradability and the oxygen efficiency of the sewage can be improved; in an anoxic section, heterotrophic bacteria ammoniate pollutants such as protein, fat and the like (N on an organic chain or amino in amino acid) to free ammonia (NH3 and NH4+), under the condition of sufficient oxygen supply, nitrification of autotrophic bacteria oxidizes NH3-N (NH4+) into NO3-, and the NO 3683-is returned to a primary anoxic tank through reflux control, under the anoxic condition, denitrification of the heterotrophic bacteria reduces NO 3-into molecular nitrogen (N2) to complete ecological circulation of C, N, O, and when sewage passes through the anoxic section, denitrifying bacteria in active sludge carry out denitrification by using nitrate nitrogen and CODcr in the sewage, so that the nitrate nitrogen is converted into the molecular nitrogen and enters the air to be effectively removed, and the good effects of removing BOD5 and denitrifying are achieved at the same time, and harmless treatment of the sewage is realized.
The sewage treated by the secondary aerobic tank enters an airlift MBR for membrane biochemical treatment of the sewage, the sludge reflows to the primary anoxic tank through a backflow pipe under the action of a sludge backflow pump, and the flow rate of the sludge backflow pump is 0.5m3H, power 0.37 kw; aerating the air-lift MBR to provide oxygen, ensuring sufficient shaking of membrane filaments and enhancing the air-water scrubbing effect; the effective volume of the airlift MBR is 2.5m for enhancing biochemical effect3And the sewage stays for 6h, the water treated by the air-lift MBR is disinfected by an ultraviolet disinfector, then flows into a clean water tank through a water pump, and the sludge is discharged into a sludge tank.
Example 2: the difference between this example and example 1 is: in the air-lift MBR membrane bioreactor, the distance L1 between the partition plate 11 and the two sides of the membrane module 18 is 25cm, the distance between the upper end of the partition plate and the upper edge L2 of the same membrane module is 35cm, and the distance L3 between the lower end of the partition plate and the bottom of the tank is 25 m.
The oil separation felt arranged in the oil separation adjusting tank in the pretreatment module is vertically arranged in two layers at an interval of 450cm, and oil separation treatment is carried out on the filtrate.
Example 3: the difference between this example and example 1 is: in the air-lift MBR membrane bioreactor, the distance L1 between the partition plate 11 and the two sides of the membrane module 18 is 35cm, the distance between the upper end of the partition plate and the upper edge L2 of the same membrane module is 45cm, and the distance L3 between the lower end of the partition plate and the bottom of the tank is 22 m.
The oil separation felt that sets up in the oil separation adjusting tank in the preliminary treatment module divides two-layer vertical setting, and two-layer interval 480cm carries out the oil separation to the filtrating and handles.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the utility model.
Claims (8)
1. The utility model provides a complete sets that distributed high concentration organic waste water handled which characterized in that: including the pretreatment module, two-stage AO reaction module and the membrane processing module who connects in order, the membrane processing module is airlift MBR membrane bioreactor, the one-level oxygen deficiency pond of two-stage AO reaction module is connected to airlift MBR membrane bioreactor's return line, set up the backwash pump on this return line, airlift MBR membrane bioreactor still connects the aeration pipeline, airlift MBR membrane bioreactor's play water piping connection clean water basin, it is disinfected to set up the sterilizer on going out the water piping, the clear water after optimizing the disinfection flows into the clean water basin, mud pipe connection sludge impoundment.
2. The decentralized high-concentration organic wastewater treatment plant according to claim 1, characterized in that: the airlift MBR membrane bioreactor comprises a reaction tank, and a membrane module and a partition board which are arranged in the reaction tank, wherein activated sludge for removing pollutants in water is filled in the space in the reaction tank, aerobic, anoxic and anaerobic zones are formed from top to bottom, the partition boards are arranged on two sides of the membrane module in the reaction tank, the distance L1 between each partition board and two side ends of the membrane module is 25-35cm, the distance between the upper end of each partition board and the upper edge L2 of the same membrane module is 35-45cm, the distance L3 between the lower end of each partition board and the bottom of the tank is 20-25m, the reaction tank is connected with a primary anoxic tank through a sludge return pipeline, and a sludge return pump is arranged on the sludge return pipeline.
3. The decentralized high-concentration organic wastewater treatment plant according to claim 1, characterized in that: the pretreatment module comprises a rotary grating machine, an oil separation regulating tank and a cloth bag filter which are sequentially connected, wherein the rotary grating machine is used for primary filtration, an oil separation felt is arranged in the oil separation regulating tank and vertically arranged in two layers, and the interval between the two layers is 450-plus-500 cm, so that the pretreatment module of the rotary grating dirt separator, the oil separation and the cloth bag filter is formed; the rotary grating machine, the oil separation regulating tank and the cloth bag filter are respectively connected with the slag tank to collect generated slag.
4. The decentralized high concentration organic wastewater treatment plant according to claim 3, characterized in that: a primary sewage lifting pump is arranged on a pipeline between the rotary grating machine and the oil separation regulating tank, and sewage filtered by the rotary grating machine is lifted into the oil separation regulating tank through the primary sewage lifting pump; a second-stage sewage lifting pump is arranged on a pipeline between the oil separation regulating tank and the cloth bag filter, and the oil separation regulating tank is connected with an aeration pipeline.
5. The decentralized high concentration organic wastewater treatment plant according to claim 3 or 4, characterized in that: the water inlet pipe of the oil separation regulating tank is connected with a carbon source supplementing pipeline; the oil removal regulating reservoir is also connected with an aeration pipeline.
6. The decentralized high-concentration organic wastewater treatment plant according to claim 1, characterized in that: the two-stage AO reaction module is including the advanced oxidation pond of LEM, flocculation and precipitation pond, one-level oxygen deficiency pond, one-level good oxygen pond, second grade oxygen deficiency pond and the good pond of second grade that connect in order, and the advanced oxidation pond of LEM, the good oxygen pond of one-level all connect the aeration pipe with the good pond of second grade respectively, and the good pond of one-level passes through the backwash pump and connects one-level oxygen deficiency pond, and the good pond of one-level passes through the backwash pipe and connects one-level oxygen deficiency pond, sets up the backwash pump on this back flow path.
7. The decentralized high concentration organic wastewater treatment plant according to claim 6, characterized in that: the advanced oxidation pond comprises a pH adjusting pond, an LEM-DF reaction pond and a flocculation sedimentation pond which are connected in sequence, the advanced oxidation pond is connected with an aeration pipeline, sewage firstly enters the pH adjusting pond to be adjusted to enable the pH value to meet the reaction condition of LEM-DF, then enters the LEM-DF reaction pond to be electrochemically oxidized, effluent is discharged in the flocculation sedimentation pond, a flocculating agent is added to precipitate when the pH value is controlled to be 7.5-8.5, the flocculation sedimentation is connected with a sludge pond, and supernatant is connected with a primary anoxic pond to perform next biochemical reaction.
8. The decentralized high concentration organic wastewater treatment plant according to claim 6, characterized in that: the secondary anoxic tank is connected with a carbon source supplementing pipeline.
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