CN213738791U - Biochemical system for treating domestic sewage - Google Patents
Biochemical system for treating domestic sewage Download PDFInfo
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- CN213738791U CN213738791U CN202121285903.0U CN202121285903U CN213738791U CN 213738791 U CN213738791 U CN 213738791U CN 202121285903 U CN202121285903 U CN 202121285903U CN 213738791 U CN213738791 U CN 213738791U
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Abstract
The utility model provides a biochemical system for handling domestic sewage, include the anaerobism pond according to sewage flow direction successively sets up, the oxygen deficiency pond, good oxygen pond and first sedimentation tank, all be provided with a plurality of suspended packing in oxygen deficiency pond and the good oxygen pond, and install two dive mixers in the oxygen deficiency pond, two dive mixers set up respectively in the income water side and the play water side in the oxygen deficiency pond, and two dive mixers set up in not co-altitude department, good oxygen bottom of the pool portion is equipped with a plurality of aeration equipment and a plurality of water distributors that are used for making to come from the income water evenly distributed in good oxygen pond in the oxygen deficiency pond, the anaerobism pond, all be provided with the overflow weir on pond upper portion in good oxygen pond and the first sedimentation tank. The utility model discloses need not throw in biochemical system and add any chemical agent such as dephosphorization medicament, but combine two kinds of technologies of AAO and MBBR together, biochemical system process units are few, and the treatment effect is good, can effectively degrade the organic matter, reduces ammonia nitrogen and total nitrogen content in the sewage.
Description
Technical Field
The utility model belongs to the domestic sewage treatment field, concretely relates to a biochemical system for handling domestic sewage.
Background
After the reform is opened, the sewage treatment demand is increased along with the continuous improvement of the living standard of people. In order to protect the natural ecological environment, the construction pace of sewage treatment facilities is accelerated in recent years, but the overall sewage treatment capacity is lower, particularly the nitrogen and phosphorus removal rate of some early-built sewage treatment plants is lower, and the effluent quality cannot reach the national discharge standard. By 6 months after 2018, 4271 seats of a sewage treatment plant are built up in cities and towns all over the country, and the sewage treatment capacity reaches 1.90 hundred million m3And d. According to relevant regulations in New Town planning (2014-. The waste water treatment investment during the thirteen-five period can reach 15.603 billion yuan. The original sewage treatment plant in the city is in overload operation for a long time under the conditions of continuous expansion of the scale of the city and continuous increase of the sewage discharge amount, and the quality of sewage is gradually complicated, so that the production process is difficult to meet the discharge standard at the present stage, therefore, the 'upgrading modification' becomes the urgent requirement of the urban sewage treatment plant, and the life of the urban sewage treatment plant during the 'upgrading modification' periodEmergency treatment of domestic sewage is becoming an urgent priority.
The Chinese patent with publication number CN105084669B discloses a treatment system and a process for treating town sewage to reach the surface water standard, which comprises a grating tank, an aeration grit chamber, an AAO biochemical tank, a circular inlet and outlet rectangular secondary sedimentation tank, a biological contact oxidation tank, a high-density sedimentation tank, a D-type filter tank and an ultraviolet disinfection tank which are connected in sequence along the process; through the careful and reasonable design and the mutual combination of the units, the effluent quality of the surface water IV discharge standard can be realized, the process stability is good, the effluent quality is well guaranteed, meanwhile, in the sewage treatment process, the dosage is less, the produced sludge is less, the operation and maintenance cost of a sewage treatment system is lower, the requirement of the era of energy conservation and consumption reduction is met, the optimal unification of environmental benefit and economic benefit is well realized, and the device is suitable for being popularized and applied to sewage treatment projects with similar water quality requirements. However, the scheme of the invention has the advantages of multiple repetitive action units, long process nodes, large floor area, long construction time and incapability of meeting the project characteristics of tight time and heavy task of domestic sewage treatment and upgrading reconstruction engineering.
The Chinese patent application with publication number CN111675435A discloses an integrated sewage treatment device and a sewage treatment method based on an A/O-MBBR process, which comprises a clarification tank, an anoxic tank, a primary aerobic tank, a secondary aerobic tank and a sedimentation tank which are connected in sequence through an overflow structure; the bottom of the sedimentation tank is provided with a power structure, the power structure is connected with the clarification tank through a return pipe, the return pipe is provided with a dephosphorization agent access port and a pipeline mixer, and the pipeline mixer is positioned at the downstream of the dephosphorization agent access port; the anoxic filler in the anoxic tank is a combined filler and is formed by wrapping polyurethane filler by a plastic spherical shell, and a carbon source medicament access port is arranged in a water inlet baffle plate of the anoxic tank; the aerobic fillers in the two aerobic tanks are respectively a high-density polyethylene MBBR filler and a PPC biological carrier; all parts are integrally installed in a shell, and the shell is made of glass fiber reinforced plastic. The sewage treatment equipment and the sewage treatment method adopt an A/O-MBBR pure biofilm process, have strong impact resistance, are matched with a chemical phosphorus removal and carbon source adding device, and can effectively enhance the removal of nitrogen and phosphorus pollutants. In the invention, an MBBR process is carried out after an AO unit, a sedimentation tank unit refluxes a nitrifying liquid to a clarification tank, and simultaneously a carbon source is added, and denitrification is started in an anoxic tank to remove nitrogen and phosphorus. However, the phosphorus and nitrogen removal effect of the scheme of the invention is poor due to the addition of the phosphorus and nitrogen removal agent in the biochemical treatment system, and the residual chemical agent influences the growth of microorganisms in the tank and further reduces the nitrogen and phosphorus removal effect because the phosphorus and phosphorus removal agent is added into the backflow pipe and flows back to the front end of the biochemical process. In addition, in the scheme of the invention, carbon sources need to be added, the sewage treatment capacity of the municipal domestic sewage treatment plant is large, the sewage treatment time is long, and the cost of the required carbon source medicament is higher under the condition of large water volume and long-time addition. Therefore, the scheme is also not suitable for upgrading and modifying municipal domestic sewage treatment plants.
Among the domestic sewage treatment systems, the biochemical system is the most central and critical part. Therefore, there is a need in the art for a new biochemical system for treating domestic wastewater.
SUMMERY OF THE UTILITY MODEL
The utility model provides a biochemical system for handling domestic sewage, biochemical system includes anaerobic tank, oxygen deficiency pond, good oxygen pond and the first sedimentation tank that successively sets up according to the sewage flow, all be provided with a plurality of suspended packing in oxygen deficiency pond and the good oxygen pond, and install two dive mixers in the oxygen deficiency pond, two dive mixers set up respectively in the income water side and the play water side in oxygen deficiency pond, and two dive mixers set up in not co-altitude department, good oxygen bottom of the pool portion is equipped with a plurality of aeration equipment and a plurality of water-locator that are used for making the income water that comes from in the oxygen deficiency pond evenly distributed in good oxygen pond, all be provided with the overflow weir on pond upper portion in anaerobic tank, good oxygen pond and the first sedimentation tank.
In a specific embodiment, the height of the submersible mixer on the water inlet side of the anoxic tank is set to be lower than the height of the submersible mixer on the water outlet side of the anoxic tank.
In a specific embodiment, the suspended filler is a cylindrical filler, and the height and the diameter of the suspended filler are both 0.5-4 cm.
In a specific embodiment, the height and the diameter of the suspended filler are both 1-2 cm.
In a specific embodiment, the material of the suspended filler is polypropylene.
In a specific embodiment, a first sewage pipe is arranged at the water inlet side of the anoxic pond, the inlet of the first sewage pipe is communicated with the water outlet side of the overflow weir at the upper part of the anaerobic pond, the first sewage pipe is arranged to enable sewage to enter the first sewage pipe from the inlet and then to be conveyed downwards to the bottom or the lower part of the anoxic pond, and the outlet of the first sewage pipe is arranged at the bottom or the lower part of the anoxic pond.
In a specific embodiment, a second sewage pipe is arranged at the water outlet side of the anoxic pond or at the water inlet side of the aerobic pond, the inlet of the second sewage pipe is communicated with the upper part of the water outlet side of the anoxic pond, the second sewage pipe is arranged to convey sewage downwards to the bottom or the lower part of the aerobic pond after entering the second sewage pipe from the inlet, the outlet of the second sewage pipe is arranged at the bottom or the lower part of the aerobic pond, and the outlet of the second sewage pipe is directly or indirectly communicated with the water distributor.
In a specific embodiment, a plurality of water distributors and a plurality of aeration devices at the bottom of the aerobic tank are arranged in a staggered manner.
In a specific embodiment, a nitrifying liquid return pipe is arranged in the aerobic tank, and a return pump is correspondingly arranged for returning part of nitrifying liquid to the anoxic tank; and a sludge return pipe is arranged in the first sedimentation tank, and a return pump is correspondingly arranged and used for returning partial sludge to the anaerobic tank.
In a specific embodiment, a submersible mixer and an aeration device are arranged in the anaerobic tank, a filter screen is arranged below an overflow weir at the upper part of the aerobic tank, an inclined plate is arranged below the overflow weir of the first sedimentation tank, and a sludge discharge pipe is arranged at the bottom of the first sedimentation tank and used for discharging residual sludge into a sludge disposal system.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1) the utility model discloses need not throw in biochemical system and add any chemical agent such as dephosphorization medicament, but combine two kinds of technologies of AAO and MBBR together, biochemical system process units are few, and the treatment effect is good, can effectively degrade the organic matter, reduces ammonia nitrogen and total nitrogen content in the sewage.
2) A biochemical system for handling domestic sewage can the assembled construction, builds fastly, and area is little, ensures that ecological environmental protection does not have secondary pollution, provides the environment that ecological environmental protection is livable for the resident on every side.
Drawings
Fig. 1 is a schematic structural diagram of the biochemical system of the present invention.
In the figure: 31-anaerobic tank, 32-anoxic tank, 33-aerobic tank, 34-sedimentation tank, 35-submersible mixer, 36-aeration device, 37-water distributor, 38-inclined plate, 39-suspended filler and 310-filter screen.
Detailed Description
As shown in fig. 1, the utility model provides a biochemical system for handling domestic sewage, biochemical system includes anaerobic tank, oxygen deficiency pond, good oxygen pond and the first sedimentation tank that successively sets up according to the sewage flow, all be provided with a plurality of suspended packing in oxygen deficiency pond and the good oxygen pond, and install two dive mixers in the oxygen deficiency pond, two dive mixers set up respectively in the income water side and the play water side in oxygen deficiency pond, and two dive mixers set up in not co-altitude department, good oxygen bottom of the pool portion is equipped with a plurality of aeration equipment and a plurality of water distributors that are arranged in making to come from the income water in the oxygen deficiency pond evenly distributed in good oxygen pond, all be provided with the overflow weir on pond upper portion in anaerobism pond, good oxygen pond and the first sedimentation tank. The height of the submersible mixer on the water inlet side in the anoxic pond is set to be lower than that of the submersible mixer on the water outlet side. The suspended filler is cylindrical, the height and the diameter of the suspended filler are both 0.5-4 cm, and the height and the diameter of the suspended filler are both preferably 1-2 cm. The material of the suspended filler is polypropylene. The sewage treatment device comprises an anaerobic tank, a first sewage pipe and a second sewage pipe, wherein the water inlet side of the anaerobic tank is provided with the first sewage pipe, the inlet of the first sewage pipe is communicated with the water outlet of an overflow weir at the upper part of the anaerobic tank, the first sewage pipe is arranged to enable sewage to enter the first sewage pipe from the inlet and then to be conveyed downwards to the bottom or the lower part of the anaerobic tank, and the outlet of the first sewage pipe is arranged at the bottom or the lower part of the anaerobic tank. And a second sewage pipe is arranged on the water outlet side of the anoxic pond or the water inlet side of the aerobic pond, the inlet of the second sewage pipe is communicated with the upper part of the water outlet side of the anoxic pond, the second sewage pipe is arranged to enable sewage to enter the second sewage pipe from the inlet and then to be conveyed downwards to the bottom or the lower part of the aerobic pond, the outlet of the second sewage pipe is arranged at the bottom or the lower part of the aerobic pond, and the outlet of the second sewage pipe is directly or indirectly communicated with the water distributor. The plurality of water distributors and the plurality of aeration devices at the bottom of the aerobic tank are arranged in a staggered manner. A nitrifying liquid return pipe is arranged in the aerobic tank, and a return pump is correspondingly arranged and used for returning part of nitrifying liquid to the anoxic tank; and a sludge return pipe is arranged in the first sedimentation tank, and a return pump is correspondingly arranged and used for returning partial sludge to the anaerobic tank. The anaerobic tank is internally provided with a submersible stirrer and an aeration device, a filter screen is arranged below an overflow weir at the upper part of the aerobic tank, an inclined plate is arranged below the overflow weir of the first sedimentation tank, and the bottom of the first sedimentation tank is also provided with a sludge discharge pipe for discharging residual sludge into a sludge disposal system.
Specifically, one submersible mixer is arranged in the anaerobic tank, two submersible mixers are arranged in the anoxic tank, and a water distributor and an aeration device are arranged at the bottom of the aerobic tank. Two dive mixers in the oxygen deficiency pond set up in opposite direction, the income water side and the play water side in oxygen deficiency pond promptly, and two dive mixers set up at co-altitude not, and the mass transfer of guarantee oxygen deficiency pond internal waste mixes, increases the circulation of oxygen deficiency pond internal waste water, prevents suspended filler agglomeration and deposit simultaneously. The water distributors and the aeration devices at the bottom of the aerobic tank are arranged in a staggered manner, wastewater enters the sewage pipe from the upper part of the anoxic tank, is conveyed downwards to the water distribution main trunk pipe at the bottom of the aerobic tank through the sewage pipe, and then flows into the water distribution pipes staggered with the aeration devices from the main trunk pipe, the wastewater enters the aerobic tank from the water distribution pipes and the water distributors, the water distributors and the aeration devices are arranged in a staggered manner, so that the uniform reaction of water, gas and fillers in the aerobic tank is facilitated, and the wastewater treatment efficiency is maximized. A reflux pump is arranged in the aerobic tank, part of nitrified liquid flows back to the anoxic tank, and part of sludge generated by the sedimentation tank flows back to the anaerobic tank through another reflux pump. Through the sludge reflux and nitrification liquid reflux process, the biochemical treatment effect is enhanced, the concentration of the activated sludge is effectively improved, and the treatment load of other treatment units is reduced. The ingenious structural design in the biochemical system of the utility model leads the oxygen transmission efficiency to be obviously improved; under the dual effects of high sludge concentration and high reaction efficiency, the biochemical reaction speed is greatly accelerated, so that the hydraulic retention time is obviously shortened. And the sewage in the anaerobic tank flows to the anoxic tank and the sewage in the aerobic tank flows to the sedimentation tank, and the sewage enters the next tank through an overflow weir at the upper part of the tank. The sedimentation mode in the sedimentation tank adopts inclined tube sedimentation or inclined plate sedimentation. The oxygen-poor tank is not provided with an overflow weir, but the anaerobic tank, the aerobic tank and the first sedimentation tank are all provided with overflow weirs at the upper parts of the tanks. And a filter screen is arranged below the overflow weir at the upper part of the aerobic tank, and the filter screen is horizontally arranged to prevent the filler from running off. After passing through the overflow weir at the upper part of the anaerobic tank, the sewage is also conveyed downwards to the bottom or the lower part of the anoxic tank through the sewage pipe and enters the anoxic tank from the bottom or the lower part of the anoxic tank. After passing through the overflow weir at the upper part of the aerobic tank, the sewage directly overflows from the overflow weir to the first sedimentation tank from top to bottom. The inclined plate in the first sedimentation tank is arranged below the overflow weir of the first sedimentation tank, and sewage overflowing from the overflow weir of the first sedimentation tank enters a subsequent advanced treatment system for further treatment. Besides the need of aeration in the aerobic tank, the oxygen demand of the anaerobic tank is small, but an aeration mechanism is also needed for carrying out intermittent aeration on the aerobic tank, and the aeration mechanism is also used for uniformly mixing the sewage in the tank while providing oxygen for the anaerobic tank.
The foregoing is a more detailed description of the invention, taken in conjunction with the specific preferred embodiments, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions and replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. The utility model provides a biochemical system for handling domestic sewage, its characterized in that, biochemical system includes anaerobic tank (31), oxygen deficiency pond (32), good oxygen pond (33) and first sedimentation tank (34) that set gradually according to the sewage flow, all be provided with a plurality of suspended packing in oxygen deficiency pond (32) and good oxygen pond (33), and install two dive mixers (35) in the oxygen deficiency pond, two dive mixers set up respectively in the income water side and the play water side in the oxygen deficiency pond, and two dive mixers set up in different height departments, good oxygen bottom of the pool portion is equipped with a plurality of aeration equipment (36) and a plurality of water-locator (37) that are arranged in making the income water that comes from in the oxygen deficiency pond evenly distributed in good oxygen pond, all be provided with the overflow weir on pond upper portion in anaerobic tank, good oxygen pond and first sedimentation tank.
2. The biochemical system for treating domestic sewage according to claim 1, wherein the height of the submersible mixer on the water inlet side in the anoxic tank is set lower than the height of the submersible mixer on the water outlet side thereof.
3. The biochemical system for treating domestic sewage according to claim 1, wherein the suspended filler is a cylindrical filler, and the height and diameter of the suspended filler are both 0.5-4 cm.
4. The biochemical system for treating domestic sewage according to claim 3, wherein the suspended filler has a height and a diameter of between 1 and 2 cm.
5. The biochemical system for treating domestic sewage according to claim 1, wherein the suspended filler is made of polypropylene.
6. The biochemical system for treating domestic sewage according to any one of claims 1-5, wherein the inlet side of the anoxic tank is provided with a first sewage pipe, the inlet of the first sewage pipe is communicated with the outlet side of the overflow weir at the upper part of the anaerobic tank, the first sewage pipe is arranged to convey sewage downwards to the bottom or lower part of the anoxic tank after the sewage enters the first sewage pipe from the inlet, and the outlet of the first sewage pipe is arranged at the bottom or lower part of the anoxic tank.
7. The biochemical system for treating domestic sewage according to any one of claims 1 to 5, wherein a second sewage pipe is provided at the water outlet side of the anoxic tank or at the water inlet side of the aerobic tank, an inlet of the second sewage pipe is communicated with an upper portion of the water outlet side of the anoxic tank, and the second sewage pipe is arranged such that sewage enters the second sewage pipe from the inlet and then is conveyed downward to the bottom or lower portion of the aerobic tank, an outlet of the second sewage pipe is arranged at the bottom or lower portion of the aerobic tank, and an outlet of the second sewage pipe is directly or indirectly communicated with the water distributor.
8. The biochemical system for treating domestic sewage according to any one of claims 1 to 5, wherein the plurality of water distributors and the plurality of aeration devices at the bottom of the aerobic tank are arranged in a staggered manner.
9. The biochemical system for treating domestic sewage according to any one of claims 1 to 5, wherein a nitrifying liquid return pipe is provided in the aerobic tank, and a return pump is correspondingly provided for returning a part of nitrifying liquid to the anoxic tank; and a sludge return pipe is arranged in the first sedimentation tank, and a return pump is correspondingly arranged and used for returning partial sludge to the anaerobic tank.
10. The biochemical system for treating domestic sewage according to any one of claims 1 to 5, wherein a submersible mixer (35) and an aeration device (36) are provided in the anaerobic tank, a filter screen (310) is provided below an overflow weir at an upper portion of the aerobic tank, an inclined plate (38) is provided below the overflow weir of the first sedimentation tank, and a sludge discharge pipe for discharging surplus sludge into a sludge disposal system is further provided at a bottom of the first sedimentation tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121285903.0U CN213738791U (en) | 2021-06-09 | 2021-06-09 | Biochemical system for treating domestic sewage |
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| CN202121285903.0U CN213738791U (en) | 2021-06-09 | 2021-06-09 | Biochemical system for treating domestic sewage |
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| CN213738791U true CN213738791U (en) | 2021-07-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114772870A (en) * | 2022-05-24 | 2022-07-22 | 湖南五方环境科技研究院有限公司 | Sewage treatment device and method for continuous flow sludge particles with controllable particle sizes |
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2021
- 2021-06-09 CN CN202121285903.0U patent/CN213738791U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114772870A (en) * | 2022-05-24 | 2022-07-22 | 湖南五方环境科技研究院有限公司 | Sewage treatment device and method for continuous flow sludge particles with controllable particle sizes |
| CN114772870B (en) * | 2022-05-24 | 2023-10-31 | 湖南五方环境科技研究院有限公司 | Sewage treatment device and method for continuous flow particle size controllable sludge particles |
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