CN106830315B - Organic waste water manifold type integration processing apparatus - Google Patents
Organic waste water manifold type integration processing apparatus Download PDFInfo
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- CN106830315B CN106830315B CN201710031825.3A CN201710031825A CN106830315B CN 106830315 B CN106830315 B CN 106830315B CN 201710031825 A CN201710031825 A CN 201710031825A CN 106830315 B CN106830315 B CN 106830315B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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Abstract
The invention discloses an organic wastewater coupling type integrated treatment device, which comprises a tank body, wherein the tank body is provided with a hollow annular wall; the annular wall comprises an inner wall and an outer wall; the space inside the annular wall is an anoxic zone; the inner wall of the annular wall surrounds the middle part of the tank body to form an aerobic zone; the anoxic zone is communicated with the aerobic zone through water holes; the aeration reflux device is positioned at the bottom of the anoxic zone and the bottom of the aerobic zone, and the solid-liquid separation device is arranged in the center of the upper part of the aerobic zone. The invention couples the anoxic-aerobic and hydraulic clarification processes, and simultaneously completes aeration of the aerobic zone, reflux of mixed liquor of the aerobic zone to the anoxic zone and stirring of the anoxic zone by utilizing an aeration reflux device; the lifting of the mixed liquid and the activated sludge in the aerobic zone to the solid-liquid separation device is completed by utilizing the air stripping effect and the negative pressure; meanwhile, the activated sludge naturally flows back to the aerobic zone by utilizing the specific gravity difference between the sludge and water to form the circulation of activated sludge residues; the device has the advantages of high integration degree, low energy consumption, small occupied area, high efficiency and reliability.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to integrated sewage treatment equipment.
Background
With the advance of industrialization and urbanization in China, the increasingly serious water pollution not only reduces the use function of water bodies and further aggravates the contradiction of water resource shortage, but also brings serious influence on the sustainable development strategy being implemented by China, and also seriously threatens the drinking water safety and the health of people of urban residents. In areas difficult to reach by sewage pipe networks, most of the generated sewage is directly discharged into nearby water bodies, so that the water pollution condition is more and more serious.
The biological sewage treatment mainly converts organic matters in the sewage into simple inorganic matters by means of the decomposition of microorganisms so as to purify the sewage, and is one of the most extensive methods in modern sewage treatment application. The A/O process is a sewage treatment process developed in the end of the seventies of the foreign 20 th century, and is one of the most widely applied sewage biological treatment processes at present.
In the A/O process, an anoxic section and an aerobic section are connected in series, wherein the DO of the A section is 0.2-0.6 mg/L, and the DO of the O section is 2-4 mg/L. the anoxic section is also called a hydrolysis acidification section, heterotrophic bacteria in the anoxic section hydrolyze suspended pollutants such as starch, fibers, carbohydrates and the like and soluble organic matters in sewage into organic acid, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, the biodegradability of the sewage can be effectively improved, and aerobic microorganisms further oxidize and decompose the organic matters subjected to hydrolysis acidification treatment in the aerobic section, so that the organic matters are converted into inorganic matters, and the sewage is purified.
In addition, heterotrophic bacteria in anoxic zones ammoniate contaminants such as proteins and fats to produce ammoniacal nitrogen (TNH)x) And enters an aerobic zone. In the aerobic zone, the nitrification of autotrophic bacteria will convert the ammonia nitrogen (TNH)x) Oxidation to nitrate nitrogen (TNO)x). Then returning to the anoxic section through reflux control, under the anoxic condition, denitrifying action of heterotrophic bacteria can react with nitrate nitrogen (TNO)x) Reduced to molecular nitrogen (N)2) C, N, O, the ecological cycle is completed, and the sewage harmless treatment is realized.
The hydraulic circulation clarification is completed by integrating two unit processes of flocculation and sedimentation in a structure, and the aim of clarification is achieved mainly by means of an active mud layer. Under the action of the water injector, active sludge in the pond is sucked and fully mixed with raw water, so that the contact and adsorption action among solid particles in water is enhanced, destabilizing impurities are retained by a sludge layer to form good flocculation when contacting with the sludge layer along with water flow, and the settling speed is accelerated to clarify water.
The existing A/O sewage treatment process and hydraulic clarification method have the following technical problems: each process unit is independently arranged, so that the coupling is low; sludge and mixed liquid backflow equipment is required, so that the energy consumption is high; the occupied area of the required structures or equipment is large, and the investment is high when medium and small-volume wastewater is treated.
Disclosure of Invention
The invention aims to provide an organic wastewater coupling type integrated treatment device, which aims to overcome the defects of the existing A/O sewage treatment process and hydraulic clarification method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a coupled integrated treatment device for organic wastewater comprises a tank body, an aeration reflux device and a solid-liquid separation device, wherein the tank body is provided with a hollow annular wall; the annular wall comprises an inner wall and an outer wall; the space inside the annular wall is an anoxic zone; the inner wall of the annular wall surrounds the middle part of the tank body to form an aerobic zone; the anoxic zone is communicated with the aerobic zone through water holes; the aeration reflux device is positioned at the bottom of the anoxic zone and the bottom of the aerobic zone, and the solid-liquid separation device is arranged in the center of the upper part of the aerobic zone.
Further, the aeration reflux device comprises a circulating jet pump, a circulating jet water pipe, a reflux stirring nozzle and an air supply type low-pressure jet aerator; the circulating jet pump is arranged outside the tank body; the inlet of the circulating jet pump is communicated with the aerobic zone through a pipeline; the outlet of the circulating jet pump is simultaneously connected with a reflux stirring nozzle arranged in the anoxic zone and the water inlet end of an air supply type low-pressure jet aerator arranged in the aerobic zone through a circulating jet water pipe; the air inlet end of the air supply type low-pressure jet aerator is connected with an air inlet pipe.
Furthermore, the circulating jet pump absorbs the mixed liquid from the aerobic zone and ejects the mixed liquid from the anoxic zone through the reflux stirring nozzle, so that the reflux of the aerobic nitrification liquid and the stirring of the anoxic zone are realized, and a reflux residual water head is utilized; in the aerobic zone, the mixed liquid is mixed with air blown by a fan in the air supply type low-pressure jet aerator, and the oxygenation process of the aerobic zone is completed.
Further, the solid-liquid separation apparatus comprises a casing including an upper cylindrical portion and a lower reverse tapered portion connected to each other; the bottom of the inverted cone-shaped part is provided with an opening, a gas-liquid inhaler is arranged in the opening, the top of the gas-liquid inhaler is provided with a feeding nozzle, a reaction cone is arranged above the feeding nozzle, and the lower part of the reaction cone is provided with a feeding throat pipe positioned at the upper part of the feeding nozzle; the cylindrical part is internally provided with an annular guide plate and is divided into an internal reaction area and an external clarification area by the annular guide plate; the reaction cone is located in the reaction zone.
Furthermore, an annular water collecting tank is arranged on the inner wall of the upper part of the cylindrical part, is positioned at the upper part of the clarification area and is connected with an external drain pipe through a water outlet pipe.
Furthermore, a sludge collecting hopper is arranged on the side edge of the inverted cone-shaped part at the lower part of the clarification area, and the sludge collecting hopper is connected with a sludge discharge device through a sludge discharge pipe.
Furthermore, the mixed liquid of mud, water and gas in the aerobic zone enters the feeding nozzle through the gas-liquid suction device, the gas-liquid suction device collects a large amount of gas, and the gas stripping action is formed at the feeding nozzle and the feeding throat part, so that the ascending flow velocity of the zone is enhanced; meanwhile, the high flow rate at the feeding nozzle can form a Venturi effect at a bell mouth at the lower part of the feeding throat pipe, and the sludge settled in the settling zone is sucked, so that the settled sludge and the mixed liquor are mixed and enter the reaction zone; in the reaction zone, fine activated sludge particles dispersed in newly entered mixed liquor are adhered by utilizing the flocculation of mucus outside microbial cells in the inhaled activated sludge to form large particles, and the large particles enter a clarification zone for separation, so that the circulation of activated sludge is formed repeatedly.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to an organic wastewater coupling type integrated treatment device, which integrates an anoxic zone, an aerobic zone, an aeration reflux device and a solid-liquid separation device, wherein the anoxic zone is arranged at the periphery of the aerobic zone, the aeration reflux device is arranged at the bottoms of the anoxic zone and the aerobic zone, the solid-liquid separation device is arranged at the center of the upper part of the aerobic zone, a circulating jet pump and a fan are arranged outside the device, and a water inlet pipe, a water outlet pipe, an air inlet pipe and a sludge discharge pipe are arranged outside the device. The invention utilizes the aeration reflux device to simultaneously complete aeration of the aerobic zone, reflux of aerobic mixed liquor to the anoxic zone and stirring of the anoxic zone, and does not need a special mixed liquor reflux device and an anoxic zone stirring device; the solid-liquid separation device is coupled in the aerobic zone, and the gas aerated in the aerobic zone is utilized to complete the lifting of the mixed liquid and the activated sludge in the aerobic zone to the solid-liquid separation device through the gas stripping action and the Venturi effect; meanwhile, the activated sludge naturally flows back to the aerobic zone by utilizing the specific gravity difference between the sludge and the water to form the circulation of the activated sludge, and a special sludge backflow system is not needed.
Furthermore, the integrated structure is realized by reasonably setting the positions of all the components, and the occupied area is small; because only two power devices, namely the fan and the circulating jet pump, are arranged in the whole device, the energy consumption is greatly reduced.
Furthermore, the invention closely couples the A/O sewage treatment process and the hydraulic clarification method, and simultaneously completes high-efficiency and reliable biological denitrification and SS removal in one device. Is suitable for treating various organic wastewater, in particular nitrogen-containing wastewater.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of the device of fig. 1.
In the figure: 1-anoxic zone, 2-aerobic zone, 3-aeration reflux device, 4-solid-liquid separation device, 5-water inlet pipe, 6-water through hole, 7-water outlet pipe, 8-circulation jet pump, 9-circulation jet water pipe, 10-reflux stirring nozzle, 11-air supply type low-pressure jet aerator, 12-blower, 13-air inlet pipe, 14-gas-liquid inhaler, 15-feeding nozzle, 16-feeding throat pipe, 17-reaction cone, 18-annular guide plate, 19-annular water collecting tank, 20-mud collecting hopper and 21-mud discharging pipe.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but the scope of the claimed invention is not limited thereto.
Referring to fig. 1 and 2, the coupling type integrated treatment device for organic wastewater of the present invention comprises a tank, an aeration reflux unit 3 and a solid-liquid separation unit 4.
The invention relates to an organic wastewater coupling type integrated treatment device, which comprises a cylindrical tank body with an opening at the upper part, wherein the tank body is provided with a hollow annular wall 100; the annular wall 100 comprises an inner wall 101 and an outer wall 102; the space inside the annular wall 100 is an anoxic zone 1; the middle part of the tank body surrounded by the annular wall 100 forms an aerobic zone 2; the upper part of the center of the aerobic zone 2 is provided with a solid-liquid separation device 4; the solid-liquid separation device 4 is fixed with the side wall or the bottom of the tank body so as to be supported at the upper part of the center of the aerobic zone.
The water inlet pipe 5 passes through the outer wall of the annular wall and is communicated with the anoxic zone 1. The inlet water is treated by the anoxic zone 1 and then enters the aerobic zone 2 through the water through holes 6 at the bottom of the inner wall of the annular wall for treatment. The mixed liquid in the aerobic zone 2 enters a solid-liquid separation device 4 through the air stripping action to complete solid-liquid separation, the treated effluent enters a water outlet pipe 7 to be discharged, and the residual sludge enters a sludge discharge pipe 21 to be discharged to complete the whole sewage treatment process.
Referring to fig. 1, the aeration reflux device 3 includes a circulation jet pump 8, a circulation jet water pipe 9, a reflux mixing nozzle 10 and an air supply type low pressure jet aerator 11; the circulating jet pump 8 is arranged outside the tank body; the inlet of the circulating jet pump 8 is communicated with the aerobic zone 2 through a pipeline; the outlet of the circulating jet pump 8 is simultaneously connected with the reflux mixing nozzle 10 arranged in the anoxic zone 1 and the water inlet end of the air supply type low-pressure jet aerator 11 arranged in the aerobic zone 2 through a circulating jet water pipe 9. The fan 12 is connected with the air inlet end of the air supply type low-pressure jet aerator 11 through an air inlet pipe 13 in the aeration reflux device 3. The circulating jet pump 8 sucks the mixed liquid from the aerobic zone 2 and ejects the mixed liquid from the anoxic zone 1 through the reflux stirring nozzle 10, so that the reflux of the aerobic nitrification liquid and the stirring of the anoxic zone are realized; in the aerobic zone 2, the mixed liquid is mixed with air blown by a fan 12 in an air supply type low-pressure jet aerator 11, and the oxygenation process of the aerobic zone is completed.
As shown in FIG. 1, the solid-liquid separation device 4 comprises a casing comprising an upper cylindrical portion and a lower reverse tapered portion connected to each other; the bottom of the inverted cone is open, a gas-liquid inhaler 14 (a feeding horn mouth without external power or a gas-liquid inhaler driven by external power) is installed in the opening, a feeding nozzle 15 is arranged at the top of the gas-liquid inhaler 14, a reaction cone 17 is arranged above the feeding nozzle 15, and a feeding throat 16 positioned at the upper part of the feeding nozzle 15 is arranged at the lower part of the reaction cone 17. An annular guide plate 18 is arranged in the cylindrical part, and the cylindrical part is divided into an internal reaction area and an external clarification area by the annular guide plate 18; a reaction cone 17 is located in the reaction zone. An annular water collecting tank 19 is arranged on the inner wall of the upper part of the cylindrical part, is positioned at the upper part of the clarification area and is connected with an external drain pipe through a water outlet pipe 7; the lower part of the clarification area is provided with a sludge collecting hopper 20 on the side of the inverted cone part, and the sludge collecting hopper collects the excess sludge and discharges the excess sludge out of the device through a sludge discharge pipe 21. The mixed liquid of mud, water and gas in the aerobic zone 2 enters a feeding nozzle 15 through a gas-liquid inhaler 14. Due to the fact that the gas-liquid inhaler 14 collects a large amount of gas, a gas stripping effect is formed in the positions of the feeding nozzle 15 and the feeding throat 16, and the ascending flow velocity of the region is enhanced; meanwhile, the high flow rate at the feeding nozzle 15 can form a Venturi effect at a bell mouth at the lower part of the feeding throat pipe 16, so that the settled sludge in the clarification zone is sucked, and the settled sludge and the mixed liquid are mixed in a large proportion and enter the reaction zone. The reaction zone is provided with a reaction cone 17 and an annular guide plate 18, the flow rate of liquid can be continuously reduced by the conical design, sufficient reaction time is provided, and the liquid flows out from the top of the reaction cone 17 after the reaction is finished. In the reaction zone, fine activated sludge particles dispersed in newly entered mixed liquor are adhered by utilizing the flocculation of mucus outside microbial cells in the inhaled activated sludge to form large particles, and the large particles enter a clarification zone for separation, so that the circulation of activated sludge is formed repeatedly. And in the clarification zone, an activated sludge suspension layer is formed, and fine particles passing through the layer are subjected to net flapping and adsorption, so that the SS content of effluent is reduced, and the effluent quality is improved.
The invention relates to an organic wastewater coupling type integrated treatment device, which is a highly integrated organic wastewater biochemical treatment facility and has the functions of effectively reducing organic matters (COD and BOD) in organic wastewater and simultaneously having stronger denitrification function and SS removal function. Can be widely applied to the treatment of various organic wastewater, in particular to the treatment of nitrogen-containing organic wastewater.
Claims (4)
1. A coupled integrated treatment device for organic wastewater is characterized by comprising a tank body, an aeration reflux device (3) and a solid-liquid separation device (4), wherein the tank body is provided with a hollow annular wall (100); the annular wall (100) comprises an inner wall and an outer wall; the space inside the annular wall (100) is an anoxic zone (1); the middle part of the tank body surrounded by the inner wall of the annular wall (100) forms an aerobic zone (2); the anoxic zone (1) is communicated with the aerobic zone (2) through a water through hole (6); the aeration reflux device (3) is positioned at the bottom of the anoxic zone (1) and the aerobic zone (2), and the solid-liquid separation device (4) is arranged in the center of the upper part of the aerobic zone (2);
the aeration reflux device (3) comprises a circulating jet pump (8), a circulating jet water pipe (9), a reflux stirring nozzle (10) and an air supply type low-pressure jet aerator (11); the circulating jet pump (8) is arranged outside the tank body; the inlet of the circulating jet pump (8) is communicated with the aerobic zone (2) through a pipeline; the outlet of the circulating jet pump (8) is simultaneously connected with a reflux stirring nozzle (10) arranged in the anoxic zone (1) and the water inlet end of an air supply type low-pressure jet aerator (11) arranged in the aerobic zone (2) through a circulating jet water pipe (9); the air inlet end of the air supply type low-pressure jet aerator (11) is connected with a fan (12) through an air inlet pipe (13);
the solid-liquid separation device (4) comprises a shell, wherein the shell comprises an upper cylindrical part and a lower inverted conical part which are connected with each other; the bottom of the inverted cone-shaped part is provided with an opening, a gas-liquid inhaler (14) is arranged in the opening, the top of the gas-liquid inhaler (14) is provided with a feeding nozzle (15), a reaction cone (17) is arranged above the feeding nozzle (15), and the lower part of the reaction cone (17) is provided with a feeding throat pipe (16) positioned at the upper part of the feeding nozzle (15); an annular guide plate (18) is arranged in the cylindrical part, and the cylindrical part is divided into an internal reaction area and an external clarification area by the annular guide plate (18); a reaction cone (17) is located in the reaction zone;
the mud, water and gas mixed liquid in the aerobic zone (2) enters a feeding nozzle (15) through a gas-liquid inhaler (14), a large amount of gas is collected by the gas-liquid inhaler (14), and a gas stripping effect is formed at the feeding nozzle (15) and a feeding throat pipe (16); meanwhile, the high flow rate at the feeding nozzle (15) can form a negative pressure zone at a bell mouth at the lower part of the feeding throat pipe (16), and the settled sludge in the clarification zone is sucked to form a mixture of the settled sludge and the mixed liquor to enter a reaction zone; in the reaction zone, fine activated sludge particles dispersed in newly entered mixed liquor are adhered by utilizing the flocculation of mucus outside microbial cells in the inhaled activated sludge to form large particles, and the large particles enter a clarification zone for separation, so that the circulation of activated sludge is formed repeatedly.
2. The coupled integrated treatment device for organic wastewater according to claim 1, wherein: the circulating jet pump (8) sucks the mixed liquid from the aerobic zone (2) and ejects the mixed liquid from the anoxic zone (1) through the reflux stirring nozzle (10), so that the reflux of the aerobic nitrification liquid and the stirring of the anoxic zone are realized; in the aerobic zone (2), the mixed liquid is mixed with air blown by a fan (12) in an air supply type low-pressure jet aerator (11), and the oxygenation process of the aerobic zone is completed.
3. The coupled integrated treatment device for organic wastewater according to claim 1, wherein: an annular water collecting tank (19) is arranged on the inner wall of the upper part of the cylindrical part, is positioned at the upper part of the clarification area and is connected with an external drain pipe through a water outlet pipe (7).
4. The coupled integrated treatment device for organic wastewater according to claim 1, wherein: the lower part of the clarification area is positioned on the side edge of the inverted cone-shaped part and is provided with a sludge collecting hopper (20), and the sludge collecting hopper (20) is connected with a sludge discharge device through a sludge discharge pipe (21).
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| CN201710031825.3A CN106830315B (en) | 2017-01-17 | 2017-01-17 | Organic waste water manifold type integration processing apparatus |
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| CN106830315B true CN106830315B (en) | 2020-07-14 |
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| CN113943082B (en) * | 2021-11-08 | 2022-11-11 | 中机国际工程设计研究院有限责任公司 | Kitchen waste wastewater treatment system |
| CN114133101B (en) * | 2021-11-08 | 2022-11-11 | 中机国际工程设计研究院有限责任公司 | Kitchen garbage effluent disposal system |
| CN114133100B (en) * | 2021-11-08 | 2022-11-11 | 中机国际工程设计研究院有限责任公司 | Organic wastewater treatment system |
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