CN218435244U - Compound sewage treatment system - Google Patents
Compound sewage treatment system Download PDFInfo
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- CN218435244U CN218435244U CN202222856028.8U CN202222856028U CN218435244U CN 218435244 U CN218435244 U CN 218435244U CN 202222856028 U CN202222856028 U CN 202222856028U CN 218435244 U CN218435244 U CN 218435244U
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Abstract
The utility model belongs to the technical field of sewage treatment, concretely relates to compound sewage treatment system. The anaerobic-aerobic combined sedimentation device comprises a facultative tank, an anoxic tank, an anaerobic tank, an aerobic tank, a post-anoxic tank, a post-aerobic tank, a horizontal sedimentation tank and a high-efficiency sedimentation tank which are sequentially connected in series and communicated; an inner reflux device and an inner reflux pipe are arranged in the rear aerobic tank, and a water inlet of the inner reflux pipe is communicated with a water outlet of the inner reflux device; the internal reflux pipe is provided with an internal reflux first water outlet and an internal reflux second water outlet, the internal reflux first water outlet is communicated with the facultative tank, and the internal reflux second water outlet is communicated with the anoxic tank; a sludge backflow device and a sludge backflow pipeline are arranged at the bottom of the horizontal sedimentation tank, the inlet of the sludge backflow pipeline is communicated with the outlet of the sludge backflow device, and the outlet of the sludge backflow pipeline is communicated with the facultative tank; the composite sewage treatment system also comprises a water inlet pipe, and the water outlet of the water inlet pipe is communicated with the water inlet of the facultative tank. The denitrification and dephosphorization effect of the sewage after the utility model is adopted is better.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, concretely relates to compound sewage treatment system.
Background
According to the discharge standard of water pollutants in the Minjiang and Tuojiang drainage basins in Sichuan province and related instruction documents, the upgrading and reconstruction project of the Minjiang and Tuojiang drainage basins generally adopts an instruction process of a high-density sedimentation tank and a denitrification deep-bed filter tank. The process has higher requirements on construction land, capital investment and later-stage operation management. Therefore, the selection of a proper sewage treatment system can not only meet the requirement that all indexes of effluent reach the discharge standard of water pollutants in Minjiang and Tuojiang drainage basins in Sichuan province
(51/2311-2016 standard), controllable construction cost is guaranteed, and operation management of sewage treatment plants is facilitated.
In patent publication No. CN113845218A, a multistage AO sewage treatment system is disclosed, which comprises a pre-anoxic tank, an anaerobic tank, an anoxic tank, an aerobic tank, an anoxic tank, a post-aerobic tank and a secondary sedimentation tank, which are sequentially connected in series along the sewage flow treatment direction. The front end of the pre-anoxic tank is provided with a water inlet area, and the rear end of the secondary sedimentation tank is provided with a water outlet area. The sewage is preferably pretreated by a pre-anoxic tank and then enters a first-stage sewage treatment unit and a second-stage sewage treatment unit to form an anoxic and aerobic alternate form, and the effect of nitrogen and phosphorus removal is achieved through multi-stage reaction. And finally, high-quality effluent is obtained through secondary sedimentation tank treatment, and simultaneously sludge reduction can be realized, so that the effluent can reach the first-level standard in Minjiang and Tuojiang basin water pollutant emission Standard in Sichuan province, and the comprehensive use cost is low. The phosphorus-accumulating bacteria can utilize biodegradable COD with higher proportion in the enhanced phosphorus removal process, the more the phosphorus-accumulating bacteria in the mixed solution are, and the more obvious the phosphorus removal effect of the system is. According to the effluent pollutant index upgrading requirement, the effluent total phosphorus index of the sewage treatment system provided by the invention can not meet the current requirement obviously.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the utility model provides a compound sewage treatment system with better denitrification and dephosphorization effects.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a composite sewage treatment system, which comprises a facultative tank, an anoxic tank, an anaerobic tank, an aerobic tank, a post-anoxic tank, a post-aerobic tank, a horizontal sedimentation tank and a high-efficiency sedimentation tank which are connected in series and communicated in sequence; an inner reflux device and an inner reflux pipe are arranged in the rear aerobic tank, and a water inlet of the inner reflux pipe is communicated with a water outlet of the inner reflux device; the internal reflux pipe is provided with an internal reflux first water outlet and an internal reflux second water outlet, the internal reflux first water outlet is communicated with the facultative tank, and the internal reflux second water outlet is communicated with the anoxic tank; a sludge reflux device and a sludge reflux pipeline are arranged at the bottom of the horizontal sedimentation tank, the inlet of the sludge reflux pipeline is communicated with the outlet of the sludge reflux device, and the outlet of the sludge reflux pipeline is communicated with the facultative tank; the composite sewage treatment system also comprises a water inlet pipe, and the water outlet of the water inlet pipe is communicated with the water inlet of the facultative tank.
Further, the method comprises the following steps: the water outlet of the water inlet pipe comprises a first water outlet of the water inlet pipe and a second water outlet of the water inlet pipe; the first water outlet of the water inlet pipe is communicated with the water inlet of the facultative tank, and the second water outlet of the water inlet pipe is communicated with the postposition anoxic tank; a valve is also arranged on the second water outlet of the water inlet pipe.
Further, the method comprises the following steps: the carbon source circulating pipe is provided with a first medicine outlet and a second medicine outlet, the first medicine outlet is communicated with the anoxic tank, the second medicine outlet is communicated with the postposition anoxic tank, and control valves are arranged on the first medicine outlet and the second medicine outlet.
Further, the method comprises the following steps: a biological filler frame is fixedly arranged in the aerobic tank.
Further, the method comprises the following steps: the efficient sedimentation tank comprises an efficient tank coagulation area, an efficient tank flocculation area and an efficient tank inclined plate sedimentation area which are sequentially connected in series and communicated; a PAC dosing device and a PAC runner pipe are arranged above the coagulation zone of the high-efficiency pool, the inlet of the PAC runner pipe is communicated with the outlet of the PAC dosing device, and the outlet of the PAC runner pipe is communicated with the coagulation zone of the high-efficiency pool; a PAM dosing device and a PAM flow pipe are arranged above the flocculation area of the high-efficiency pool, the inlet of the PAM flow pipe is communicated with the outlet of the PAM dosing device, and the outlet of the PAM flow pipe is communicated with the flocculation area of the high-efficiency pool; and control valves are arranged on the PAC circulating pipe and the PAM circulating pipe.
Further, the method comprises the following steps: an underwater flow impeller is arranged at the bottom of the facultative tank, and the flow pushing direction of the underwater flow impeller is opposite to the flow direction of sewage.
Further, the method comprises the following steps: the device also comprises a rotary filter, and a water inlet of the rotary filter is communicated with a water outlet of the high-efficiency sedimentation tank.
Further, the method comprises the following steps: an aeration device is also arranged at the bottom of the postposition anoxic tank.
The beneficial effects of the utility model are that: the utility model discloses well sewage flows in from the inlet tube and flows in proper order again into facultative tank, oxygen deficiency pond, anaerobism pond, good oxygen pond, rearmounted oxygen deficiency pond, rearmounted good oxygen pond, advection sedimentation tank and high-efficient sedimentation tank. Partial insoluble organic matters in the sewage are converted into soluble organic matters and partial nondegradable macromolecular organic matters are converted into micromolecular biodegradable organic matters through hydrolysis and acid production in the facultative tank, so that the biodegradability of the sewage is improved, and the C/N ratio of raw water is further improved; then the sewage passes through an anoxic tank, an anaerobic tank and an aerobic tank to remove organic pollutants, total phosphorus and total nitrogen; then the sewage is led into a post-positioned anoxic tank to further strengthen the removal of the total nitrogen; then the sewage is treated by a post-aerobic tank to remove organic matters. And (3) removing sludge from the sewage through a horizontal sedimentation tank, and removing substances such as suspended matters, colloids and the like through a high-efficiency sedimentation tank. The arrangement of the internal reflux device and the internal reflux pipe can improve the subsequent nitrification reaction and denitrification reaction by refluxing the mixed liquid in the rear aerobic tank to the facultative tank; after the mixed liquid in the post-positioned aerobic tank flows back to the anoxic tank, the denitrifying bacteria can reduce the nitrate nitrogen which flows back to the anoxic tank into nitrogen by using the carbon source of the inlet water, thereby achieving the aim of denitrification. The sludge reflux device and the sludge reflux pipeline are arranged to reflux the sludge to the facultative tank, so that the sludge is refluxed to the facultative tank, the aim is to ensure that each biochemical tank keeps relatively stable MLSS, maintain proper sludge load, and contribute to the reaction of the anaerobic tank and the anoxic tank. Just the utility model discloses having invertd anaerobic tank and oxygen deficiency pond in the traditional AAO technology, can having reduced the impact of nitrate in the mud to the anaerobic tank, avoid influencing the release of anaerobic section phosphorus because of a large amount of nitrates that the backward flow comes, create the good environment of selection for the phosphorus release of phosphorus accumulating bacteria, and then strengthened the dephosphorization effect. The design of the horizontal sedimentation tank is favorable for sludge sedimentation, and the arrangement of the high-efficiency sedimentation tank can settle substances such as micro suspended matters, colloids and the like in sewage. After the composite sewage treatment system provided by the utility model is adopted, the nitrogen and phosphorus removal effects of sewage are good.
Drawings
FIG. 1 is a schematic view of the composite sewage treatment system of the present invention;
labeled as: 1-a facultative tank, 2-an anoxic tank, 3-an anaerobic tank, 4-an aerobic tank, 5-a postposition anoxic tank, 6-a postposition aerobic tank, 7-a horizontal flow sedimentation tank, 8-a high-efficiency sedimentation tank, 81-a high-efficiency tank coagulation zone, 82-a high-efficiency tank flocculation zone, 83-a high-efficiency tank inclined plate sedimentation zone, 9-an internal reflux device, 10-an internal reflux pipe, 11-a sludge reflux device, 12-a sludge reflux pipeline, 13-a water inlet pipe, 14-a valve, 15-a carbon source adding device, 16-a carbon source circulating pipe, 17-a biological filler frame, 18-a PAC adding device, 19-a PAC circulating pipe, 20-a PAM adding device, 21-a PAM circulating pipe, 22-an underwater plug flow device, 23-a rotary filter and 24-an aeration device.
Detailed Description
The following detailed description of the present invention will be provided in order to further understand the concept of the present invention, the technical problems, the technical features constituting the technical solutions, and the technical effects brought by the technical features of the present invention, which are described in the following with reference to the accompanying drawings. However, the description of the embodiments is illustrative and not intended to limit the present invention.
The utility model provides a composite sewage treatment system, which comprises a facultative tank 1, an anoxic tank 2, an anaerobic tank 3, an aerobic tank 4, a post-anoxic tank 5, a post-aerobic tank 6, a horizontal sedimentation tank 7 and a high-efficiency sedimentation tank 8 which are sequentially communicated; an internal reflux device 9 and an internal reflux pipe 10 are arranged in the rear aerobic tank 6, and the water inlet of the internal reflux pipe 10 is communicated with the water outlet of the internal reflux device 9; the internal reflux pipe 10 is provided with an internal reflux first water outlet and an internal reflux second water outlet, the internal reflux first water outlet is communicated with the facultative tank 1, and the internal reflux second water outlet is communicated with the anoxic tank 2; a sludge return device 11 and a sludge return pipeline 12 are arranged at the bottom of the horizontal sedimentation tank 7, the inlet of the sludge return pipeline 12 is communicated with the outlet of the sludge return device 11, and the outlet of the sludge return pipeline 12 is communicated with the facultative tank 1; the composite sewage treatment system also comprises a water inlet pipe 13, and the water outlet of the water inlet pipe 13 is communicated with the water inlet of the facultative tank 1.
The utility model discloses well sewage flows in from inlet tube 13, then flows in proper order in facultative tank 1, oxygen deficiency pond 2, anaerobism pond 3, good oxygen pond 4, rearmounted oxygen deficiency pond 5, rearmounted good oxygen pond 6, advection sedimentation tank 7 and high-efficient sedimentation tank 8. Sewage is through hydrolysis and acid production effect in facultative tank 1, turns into the organic matter of solubility with partial insoluble organic matter in sewage, and partial non-degradable's macromolecule organic matter turns into the easily degradable organic matter of micromolecule, has improved the biodegradability of sewage, and then has promoted the C/N ratio in the middle of the sewage. Then the sewage passes through an anoxic tank 2, an anaerobic tank 3 and an aerobic tank 4 to realize the removal of organic pollutants, total phosphorus and total nitrogen; then the sewage is led into a post-positioned anoxic tank 5 to further strengthen the removal of the total nitrogen, and then the sewage is led into a post-positioned aerobic tank 6 to strengthen the removal of the organic matters. Finally, the sewage is treated by a horizontal sedimentation tank 7 to remove sludge, and substances such as suspended matters, colloids and the like are removed by a high-efficiency sedimentation tank 8. The arrangement of the internal reflux device 9 and the internal reflux pipe 10 enables the mixed liquid in the post-positioned aerobic tank 6 to reflux to the facultative tank 1, so that the subsequent nitrification reaction and denitrification reaction can be improved; after the mixed liquid in the post-positioned aerobic tank 6 flows back to the anoxic tank 2, the denitrifying bacteria can reduce the nitrate nitrogen flowing back to the anoxic tank 2 into nitrogen by using a water inlet carbon source, so that the aim of denitrification is fulfilled. The sludge reflux device 11 and the sludge reflux pipeline 12 are arranged to reflux the sludge to the facultative tank 1, so as to ensure that each biochemical tank maintains relatively stable MLSS, maintain proper sludge load and also facilitate the reaction of the anaerobic tank 3 and the anoxic tank 2. The utility model discloses having invertd anaerobism pond 3 in the traditional AAO technology and oxygen deficiency pond 2, can reducing the nitrate in the mud to the impact of anaerobism pond 3, avoid influencing the release of anaerobic zone phosphorus because of a large amount of nitrates that the backward flow comes, create the good environment of selection for the phosphorus release of phosphorus-accumulating bacteria, and then strengthened the dephosphorization effect. The design of the horizontal sedimentation tank 7 is beneficial to sludge sedimentation, and the arrangement of the high-efficiency sedimentation tank 8 can settle substances such as micro suspended matters, colloids and the like in sewage. After the composite sewage treatment system provided by the utility model is adopted, the nitrogen and phosphorus removal effects of sewage are good.
The type, specification and the like of the internal reflux device 9 are not limited in the present embodiment, and an internal reflux pump is usually selected; the type, specification, and the like of the external reflux unit 11 are not limited, and a suction dredge, a sludge reflux pump, and the like are generally used. The utility model discloses in back flow pipe 10, mud return pipe 12 and inlet tube 13 etc. not to inject it must be the pipeline, as long as its structure that can play drainage, water conservancy diversion effect all belongs to the utility model discloses in the pipe that indicates, for example the inlet channel, mud return channel, the ditch of intaking, interior backward flow ditch etc..
Further, in order to improve the denitrification capability of the anoxic tank 2 while saving the carbon source, the water inlet pipe 13 is provided with a first water outlet of the water inlet pipe and a second water outlet of the water inlet pipe, the first water outlet of the water inlet pipe is communicated with the water inlet of the facultative tank 1, the second water outlet of the water inlet pipe is communicated with the postposition anoxic tank 5, and the second water outlet of the water inlet pipe is further provided with a valve 14. If the anoxic tank 5 lacks a carbon source and the denitrification capacity is insufficient, the valve 14 is opened to feed raw water, and the part of raw water serves as a part of carbon source, so that the addition of an external carbon source is saved.
Further, for the convenience of adding of carbon source, the cost of using manpower sparingly, the utility model discloses still include the carbon source and add feeder apparatus 15 and carbon source runner pipe 16, the export intercommunication of feeder apparatus 15 is added to the entry and the carbon source of carbon source runner pipe 16, and carbon source runner pipe 16 has first medicine mouth and second medicine mouth, and first medicine mouth and 2 intercommunications in oxygen deficiency pond, second medicine mouth and 5 intercommunications in rearmounted oxygen deficiency pond all are provided with control flap on first medicine mouth and second medicine mouth. When the carbon source needs to be added, the valve is opened, which is very convenient. There are many kinds of carbon sources to throw feeder apparatus 15 among the prior art, the utility model discloses do not restrict specific kind, model and specification etc. as long as can play the carbon source and throw and to throw the homoenergetic.
Furthermore, in order to facilitate the fixation of the suspended filler, the nitrification capacity of the aerobic tank 4 is improved, and the continuous stay of nitrifying bacteria in the aerobic tank 4 is prolonged. A biological filler frame 17 is fixedly arranged in the aerobic tank 4.
Further, in the utility model, the high-efficiency sedimentation tank 8 comprises a high-efficiency tank coagulation zone 81, a high-efficiency tank flocculation zone 82 and a high-efficiency tank inclined plate sedimentation zone 83 which are connected in series and communicated in sequence; a PAC dosing device 18 and a PAC circulating pipe 19 are arranged above the high-efficiency pool coagulation zone 81, the inlet of the PAC circulating pipe 19 is communicated with the outlet of the PAC dosing device 18, and the outlet of the PAC circulating pipe 19 is communicated with the high-efficiency pool coagulation zone 81; a PAM dosing device 20 and a PAM circulating pipe 21 are arranged above the flocculation area 82 of the high-efficiency tank, the inlet of the PAM circulating pipe 21 is communicated with the outlet of the PAM dosing device 20, and the outlet of the PAM circulating pipe 21 is communicated with the flocculation area 82 of the high-efficiency tank; the PAC circulating pipe 19 and the PAM circulating pipe 21 are both provided with control valves.
In order to prolong the retention time of sewage in the facultative tank 1 and improve the biodegradability of the sewage, and in order to fully mix the sludge returned by the sludge return device 11 and the sludge return pipeline 12 with the sewage in the facultative tank 1, an underwater flow impeller 22 is arranged at the bottom of the facultative tank 1, and the flow pushing direction of the underwater flow impeller 22 is opposite to the flow direction of the sewage.
For strengthening the filtering effect the utility model discloses still include rotary filter 23, rotary filter 23's water inlet and high-efficient sedimentation tank 8's delivery port intercommunication.
In order to further improve the utility model, the composite sewage treatment system is also provided with an aeration device 24 at the bottom of the post-anoxic tank 5 for removing the total nitrogen and the organic pollutants. The aeration device 24 is opened, so that the volume of an aerobic zone of the post-positioned anoxic tank 5 can be increased, and organic pollutants can be removed conveniently; the aeration device 24 is closed to achieve the function of post-anoxic and facilitate the removal of total nitrogen.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. Compound sewage treatment system, its characterized in that: comprises a facultative tank (1), an anoxic tank (2), an anaerobic tank (3), an aerobic tank (4), a post-positioned anoxic tank (5), a post-positioned aerobic tank (6), a horizontal sedimentation tank (7) and a high-efficiency sedimentation tank (8) which are connected in series and communicated in sequence; an inner reflux device (9) and an inner reflux pipe (10) are arranged in the rear aerobic tank (6), and a water inlet of the inner reflux pipe (10) is communicated with a water outlet of the inner reflux device (9); the internal reflux pipe (10) is provided with an internal reflux first water outlet and an internal reflux second water outlet, the internal reflux first water outlet is communicated with the facultative tank (1), and the internal reflux second water outlet is communicated with the anoxic tank (2); a sludge reflux device (11) and a sludge reflux pipeline (12) are arranged at the bottom of the horizontal sedimentation tank (7), the inlet of the sludge reflux pipeline (12) is communicated with the outlet of the sludge reflux device (11), and the outlet of the sludge reflux pipeline (12) is communicated with the facultative tank (1); the composite sewage treatment system also comprises a water inlet pipe (13), and the water outlet of the water inlet pipe (13) is communicated with the water inlet of the facultative tank (1).
2. The compound sewage treatment system of claim 1, wherein: the water outlet of the water inlet pipe (13) comprises a first water outlet of the water inlet pipe and a second water outlet of the water inlet pipe; a first water outlet of the water inlet pipe is communicated with a water inlet of the facultative tank (1), and a second water outlet of the water inlet pipe is communicated with the postposition anoxic tank (5); a valve (14) is also arranged on the second water outlet of the water inlet pipe.
3. The compound sewage treatment system of claim 1, wherein: the carbon source feeding device is characterized by further comprising a carbon source feeding device (15) and a carbon source circulating pipe (16), wherein an inlet of the carbon source circulating pipe (16) is communicated with an outlet of the carbon source feeding device (15), the carbon source circulating pipe (16) is provided with a first medicine outlet and a second medicine outlet, the first medicine outlet is communicated with the anoxic tank (2), the second medicine outlet is communicated with the postposition anoxic tank (5), and control valves are arranged on the first medicine outlet and the second medicine outlet.
4. The compound sewage treatment system of claim 1, wherein: a biological filler frame (17) is fixedly arranged in the aerobic tank (4).
5. The compound sewage treatment system of claim 1, wherein: the high-efficiency sedimentation tank (8) comprises a high-efficiency tank coagulation area (81), a high-efficiency tank flocculation area (82) and a high-efficiency tank inclined plate sedimentation area (83) which are connected in series and communicated in sequence; a PAC dosing device (18) and a PAC circulating pipe (19) are arranged above the high-efficiency pool coagulation zone (81), the inlet of the PAC circulating pipe (19) is communicated with the outlet of the PAC dosing device (18), and the outlet of the PAC circulating pipe (19) is communicated with the high-efficiency pool coagulation zone (81); a PAM dosing device (20) and a PAM flow pipe (21) are arranged above the flocculation area (82) of the high-efficiency tank, the inlet of the PAM flow pipe (21) is communicated with the outlet of the PAM dosing device (20), and the outlet of the PAM flow pipe (21) is communicated with the flocculation area (82) of the high-efficiency tank; the PAC circulating pipe (19) and the PAM circulating pipe (21) are both provided with control valves.
6. The compound sewage treatment system of claim 1, wherein: an underwater flow impeller (22) is arranged at the bottom of the facultative tank (1), and the flow pushing direction of the underwater flow impeller (22) is opposite to the flow direction of sewage.
7. The compound sewage treatment system of claim 1, wherein: the device also comprises a rotary filter (23), and a water inlet of the rotary filter (23) is communicated with a water outlet of the high-efficiency sedimentation tank (8).
8. The compound sewage treatment system of claim 1, wherein: an aeration device (24) is also arranged at the bottom of the post anoxic tank (5).
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| CN202222856028.8U CN218435244U (en) | 2022-10-28 | 2022-10-28 | Compound sewage treatment system |
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| CN202222856028.8U CN218435244U (en) | 2022-10-28 | 2022-10-28 | Compound sewage treatment system |
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| CN218435244U true CN218435244U (en) | 2023-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116177744A (en) * | 2023-03-29 | 2023-05-30 | 北京华夏启新环境科技有限公司 | Sewage treatment system and method for improving efficient denitrification and dephosphorization of AOA technology coupled MBR |
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2022
- 2022-10-28 CN CN202222856028.8U patent/CN218435244U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116177744A (en) * | 2023-03-29 | 2023-05-30 | 北京华夏启新环境科技有限公司 | Sewage treatment system and method for improving efficient denitrification and dephosphorization of AOA technology coupled MBR |
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