CN214571415U - Rural domestic sewage recycling system in coastal area based on MBR - Google Patents
Rural domestic sewage recycling system in coastal area based on MBR Download PDFInfo
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- CN214571415U CN214571415U CN202120748404.4U CN202120748404U CN214571415U CN 214571415 U CN214571415 U CN 214571415U CN 202120748404 U CN202120748404 U CN 202120748404U CN 214571415 U CN214571415 U CN 214571415U
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Abstract
The utility model relates to a rural domestic sewage recycling system in coastal areas based on MBR, which comprises a pretreatment part, a biochemical treatment part and a disinfection part in sequence according to the sewage flow direction; the pretreatment part comprises a grating water collecting tank, a regulating tank and a basket filter; the biochemical treatment part comprises an anaerobic tank with anaerobic bacteria, an anoxic tank with mixotrophic microorganisms, an aerobic tank, a sedimentation tank and a membrane filter; the disinfection part comprises a reclaimed water reuse pool and a sodium hypochlorite storage tank; the sewage is conveyed between the grating water collecting tank and the adjusting tank through a lifting pump, and the basket filter is arranged on a connecting pipeline between the pretreatment part and the biochemical treatment part; the membrane filter is connected with a water reuse tank through a submersible pump and a pipeline, and a sodium hypochlorite storage tank is connected into the membrane filter. The system has small floor area and high automation degree, improves the particularity of rural domestic sewage quality in coastal areas on the basis of an MBR technology, and realizes the recycling of water resources.
Description
Technical Field
The utility model relates to a sewage treatment technical field, concretely relates to rural domestic sewage recycling system in coastal area based on MBR.
Background
In recent years, large-scale water control work is carried out in rural areas to protect fresh water rivers and lakes, but the direct drainage of rural domestic sewage still exists in many coastal areas, so that the peripheral environment of the coastal rural areas is deteriorated, the pollution to peripheral sea areas is serious, and even the marine environment and fishery resources are adversely affected. The quality of rural domestic sewage in coastal areas is different from that in inland areas, the sewage has higher nitrogen content and relatively lower C/N, and is not beneficial to biological denitrification; in addition, because a chemical cleaning agent, a detergent and the like are used in daily life, the phosphorus content in the sewage is also high; in addition, the influence of sea soil, precipitation and the like causes that the sewage contains higher chloride ions, which easily causes the problems of serious corrosion of the sewage treatment part, idling and shutdown of the system and the like.
At present, the conventional rural sewage treatment process mainly comprises a contact oxidation process, an MBBR (moving bed biofilm reactor) process and an MBR (membrane bioreactor) process, wherein the contact oxidation process is easy to partially block and collapse in the operation process, and the operation and maintenance are complicated; the MBBR technology has no removal effect on SS, and needs to rely on a rear-end sedimentation tank or a matched filtering technology for treatment, so that effluent is difficult to recycle; the MBR process has small floor area and can effectively remove SS and organic matters difficult to degrade, but the existing MBR process easily causes membrane thread pollution and blockage and complex operation and maintenance due to high sludge concentration, and in addition, when a membrane tank is overhauled and the MBR is cleaned off line, a system needs to be shut down, so that sewage can be discharged everywhere.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the rural domestic sewage recycling system in the coastal region is based on an MBR technology, improves the specificity of the rural domestic sewage quality in the coastal region, and realizes the recycling of water resources.
The rural domestic sewage recycling system based on the MBR in the coastal region sequentially comprises a pretreatment part, a biochemical treatment part and a disinfection part according to the sewage flow direction; the pretreatment part comprises a grating water collecting tank, a regulating tank and a basket filter; the biochemical treatment part comprises an anaerobic tank with anaerobic bacteria, an anoxic tank with mixotrophic microorganisms, an aerobic tank, a sedimentation tank and a membrane filter; the disinfection part comprises a reclaimed water reuse pool and a sodium hypochlorite storage tank; the grid water collecting tank and the adjusting tank realize sewage conveying through a lifting pump, and the basket filter is arranged on a connecting pipeline between the pretreatment part and the biochemical treatment part; the membrane filter passes through immersible pump and pipeline with water reuse water pond is connected, sodium hypochlorite storage tank inserts the membrane filter.
In order to remove soft entanglement, larger solid particle impurities and floaters in the sewage and further collect the sewage at the initial stage, a basket grid is arranged in the grid water collecting tank.
In order to remove various organic substances in the sewage by utilizing the biochemical degradation and adsorption effect of a large number of microbial communities of different species attached to the filler under the joint participation, the content of the organic substances in the sewage is greatly reduced, the aerobic tank is internally provided with the rope-type filler and the microporous aeration disc, and the membrane filter tank is internally provided with the MBR.
In order to realize the maintenance and off-line cleaning of the membrane filtration zone, supernatant of the sedimentation zone can directly enter a reclaimed water reuse tank, and the sedimentation tank is connected with the reclaimed water reuse tank through a lifting pump and a pipeline.
In order to keep the membrane surface clean by aeration scouring, an aeration head is arranged at the lower part of the MBR reactor.
In order to facilitate the regular discharge and transportation treatment of the precipitated sludge in the precipitation zone, the precipitation tank is connected with a sludge storage tank.
Aiming at the particularity of the rural domestic sewage quality in the coastal region, a carbon source storage tank is connected to the outside of the anoxic tank; and the exterior of the aerobic tank is connected with a PAC flocculating agent storage tank. When the carbon source of inlet water is insufficient and the total phosphorus of outlet water is high, the carbon source is added outside the anoxic tank, and PAC flocculant is added at the tail end of the aerobic tank, so that the quality of outlet water is ensured.
In order to effectively reduce the corrosion of chloride ions in sewage in coastal areas to all areas of the system, the carbon steel sewage tank related to the whole system is internally coated with polyurea water-based waterproof paint for corrosion prevention, and the outside of the carbon steel sewage tank is coated with four oil and two cloth reinforced corrosion prevention.
The utility model relates to a rural domestic sewage recycling system in coastal area based on MBR is little, degree of automation is high, and it uses the MBR technique as the basis, improves to the particularity of rural domestic sewage quality of water in coastal area to realize the cyclic utilization of water resource, specific beneficial effect is:
(1) by adopting an improved process of A2O + MBR, SS and refractory organic matters are effectively removed, effluent can be recycled, and water resources are saved;
(2) before sewage enters the MBR membrane filtering area, a settling area is arranged, so that the fouling and blocking frequency of the MBR membrane is reduced, and the operation and maintenance are convenient;
(3) an intermediate lifting link is arranged, when the membrane filtration area needs to be overhauled and the membrane is cleaned off line, the supernatant in the precipitation area is lifted by a submersible pump and directly enters a reclaimed water reuse tank, production stop is not needed, and the sewage treatment efficiency is not influenced;
(4) a carbon source is added outside the anoxic tank, and a PAC flocculating agent is added at the tail end of the aerobic tank to ensure the quality of the effluent, so that the problems of insufficient carbon source of the sewage inlet in rural areas in coastal areas and high total phosphorus of the effluent are solved.
Drawings
The utility model relates to a rural domestic sewage recycling system in coastal area based on MBR is further explained with reference to the attached drawing below:
FIG. 1 is a schematic plane structure diagram of a rural domestic sewage reuse system in coastal areas based on MBR;
FIG. 2 is a line frame diagram of the operation principle of a rural domestic sewage reuse system in the coastal region based on MBR.
In the figure:
1-a pretreatment part, 2-a biochemical treatment part, 3-a disinfection part, 4-a sludge storage tank, 5-a carbon source storage tank and 6-PAC flocculant storage tank;
11-a grid water collecting tank, 12-a regulating tank and 13-a basket filter; 21-an anaerobic tank, 22-an anoxic tank, 23-an aerobic tank, 24-a sedimentation tank and 25-a membrane filter tank; 32-reclaimed water reuse pool and 32-sodium hypochlorite storage tank;
111-a basket grid; 231-rope type packing and microporous aeration disc, 251-MBR reactor.
Detailed Description
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it is to be understood that the terms "left", "right", "front", "back", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Embodiment 1: as shown in fig. 1 and 2, the MBR-based rural domestic sewage recycling system in the coastal region sequentially comprises a pretreatment part 1, a biochemical treatment part 2 and a disinfection part 3 according to the sewage flow direction; the pretreatment part 1 comprises a grid water collecting tank 11, a regulating tank 12 and a basket filter 13; the biochemical treatment part 2 comprises an anaerobic tank 21 with anaerobic bacteria, an anoxic tank 22 with mixotrophic microorganisms, an aerobic tank 23, a sedimentation tank 24 and a membrane filter tank 25; the disinfection part 3 comprises a reclaimed water reuse tank 31 and a sodium hypochlorite storage tank 32; the sewage is conveyed between the grating water collecting tank 11 and the adjusting tank 12 through a lifting pump, and the basket filter 13 is arranged on a connecting pipeline between the pretreatment part 1 and the biochemical treatment part 2; the membrane filter 25 is connected with the water reuse tank 31 through a submersible pump and a pipeline, and the sodium hypochlorite storage tank 32 is connected into the membrane filter 25. The inside of the carbon steel sewage tank related to the whole system is anticorrosive by spraying polyurea water-based waterproof paint, and the outside of the carbon steel sewage tank is anticorrosive by adopting four-oil two-cloth reinforced level. Effectively reduces the corrosion of the excessive chloride ions in the sewage in coastal areas to all areas of the system.
Embodiment 2: this rural domestic sewage recycling system in coastal area based on MBR be equipped with hand-basket grid 111 in grid catch basin 11. The device is used for removing soft entanglement, larger solid particle impurities and floaters in sewage, and further collecting the sewage at the initial stage. The aerobic tank 23 is internally provided with a rope-type filler and a microporous aeration disc 231, and the membrane filter 25 is internally provided with an MBR (membrane bioreactor) 251. The biochemical degradation and adsorption action of a large number of microbial communities of different species attached to the filler are jointly used for removing various organic substances in the sewage, so that the content of organic substances in the sewage is greatly reduced. The settling tank 24 is connected to the water reuse tank 31 through a lift pump and a pipe. When the membrane filtration area is overhauled and cleaned off line, the supernatant of the sedimentation area can directly enter a reclaimed water reuse pool. An aeration head 252 is arranged at the lower part of the MBR 251. Used for keeping the membrane surface clean by aeration scouring. The sedimentation tank 24 is connected with the sludge storage tank 4. Is convenient for the sediment sludge in the sediment zone to be discharged and transported for treatment at regular intervals. The remaining structure and components are as described in embodiment 1, and the description will not be repeated.
Embodiment 3: the MBR-based rural domestic sewage recycling system for the coastal region is characterized in that a carbon source storage tank 5 is connected to the outside of the anoxic tank 22; the outside of the aerobic tank 23 is connected with a PAC flocculating agent storage tank 6. Aiming at the particularity of the quality of rural domestic sewage in coastal areas, when the carbon source of inlet water is insufficient and the total phosphorus of outlet water is high, the quality of the outlet water is ensured by adding the carbon source outside the anoxic tank and adding the PAC flocculating agent at the tail end of the aerobic tank. The remaining structure and components are as described in embodiment 1, and the description will not be repeated.
And (3) running: firstly, sewage enters a grid collecting tank, soft entanglement, larger solid particle impurities and floaters in the sewage are removed through a basket grid, the sewage is initially collected through the collecting tank, and then the sewage is lifted by a lifting pump to enter an adjusting tank; adjusting the quality and quantity of the sewage in an adjusting tank; the effluent is lifted by the pump and is further removed by the basket filter on the pipeline. The effluent enters an anaerobic zone, and organic matters are hydrolyzed, acidified and methanated under the action of anaerobic bacteria, so that macromolecular organic matters in the wastewater are removed, and the biodegradability of the sewage is improved; effluent enters an anoxic zone, the anoxic zone is a facility mainly based on a denitrification process, indissolvable organic matters in sewage are converted into soluble organic matters by facultative microorganisms, and nitrate nitrogen and nitrite nitrogen which flow back through a membrane pool can be subjected to denitrification under the action of denitrifying bacteria to remove total nitrogen; the effluent enters an aerobic zone, and various organic substances in the sewage are removed through the biochemical degradation and adsorption action of a large number of microbial communities of different species attached to the filler, so that the content of organic substances in the sewage is greatly reduced; the effluent enters a settling zone, after solid-liquid separation, supernatant in the settling zone is collected and automatically flows to a membrane filtration zone; sewage is discharged after gathering by the MBR collector pipe through self priming pump suction in the membrane filtration district, the high-efficient effect of holding back through the membrane, whole bacterium and suspended solid are all held back in the membrane cisterna, MBR goes out the water and gets into well water reuse pond through sodium hypochlorite disinfection, go out the water and can reuse and wash the MBR membrane, peasant household washes lavatory and farmland irrigation etc. when membrane filtration district overhauls, when the membrane off-line washs, the settling zone supernatant can promote directly to enter into well water reuse pond through the immersible pump.
And residual sludge in the settling zone is discharged into a sludge storage pool and is pumped by a pump truck for outward transportation at regular intervals. When the carbon source of inlet water is insufficient and the total phosphorus of outlet water is high, the quality of outlet water is ensured by adding a carbon source outside the anoxic tank and adding a PAC (polyaluminium chloride) flocculating agent at the tail end of the aerobic tank; MBR utilizes sodium hypochlorite to carry out online CIP chemical cleaning through membrane washing jar according to certain cycle, guarantees that MBR membrane module has good flux, can last, stable play water. The inside of the carbon steel sewage tank related to the whole system is anticorrosive by spraying polyurea water-based waterproof paint, and the outside of the carbon steel sewage tank is anticorrosive by adopting four-oil two-cloth reinforced level.
This rural domestic sewage recycling system in coastal area based on MBR area is little, degree of automation is high, and it uses the MBR technique as the basis, improves to the particularity of rural domestic sewage quality of water in coastal area to realize the cyclic utilization of water resource, specifically do: by adopting an improved process of A2O + MBR, SS and refractory organic matters are effectively removed, effluent can be recycled, and water resources are saved; before sewage enters the MBR membrane filtering area, a settling area is arranged, so that the fouling and blocking frequency of the MBR membrane is reduced, and the operation and maintenance are convenient; an intermediate lifting link is arranged, when the membrane filtration area needs to be overhauled and the membrane is cleaned off line, the supernatant in the precipitation area is lifted by a submersible pump and directly enters a reclaimed water reuse tank, production stop is not needed, and the sewage treatment efficiency is not influenced; a carbon source is added outside the anoxic tank, and a PAC flocculating agent is added at the tail end of the aerobic tank to ensure the quality of the effluent, so that the problems of insufficient carbon source of the sewage inlet in rural areas in coastal areas and high total phosphorus of the effluent are solved.
The above description shows the main features, the basic principles, and the advantages of the invention. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments or examples, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The foregoing embodiments or examples are therefore to be considered in all respects illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a rural domestic sewage recycling system in coastal area based on MBR, characterized by: according to the sewage flow direction, the sewage treatment device sequentially comprises a pretreatment part (1), a biochemical treatment part (2) and a disinfection part (3); the pretreatment part (1) is connected with the biochemical treatment part (2), the biochemical treatment part (2) and the disinfection part (3) through pipelines and pumps, wherein,
the pretreatment part (1) comprises a grid water collecting tank (11), a regulating tank (12) and a basket filter (13); the biochemical treatment part (2) comprises an anaerobic tank (21) with anaerobic bacteria, an anoxic tank (22) with mixotrophic microorganisms, an aerobic tank (23), a sedimentation tank (24) and a membrane filter (25); the disinfection part (3) comprises a reclaimed water reuse pool (31) and a sodium hypochlorite storage tank (32);
the sewage is conveyed between the grating water collecting tank (11) and the adjusting tank (12) through a lifting pump, and the basket filter (13) is arranged on a connecting pipeline between the pretreatment part (1) and the biochemical treatment part (2); the membrane filter tank (25) is connected with the water reuse tank (31) through a submersible pump and a pipeline, and the sodium hypochlorite storage tank (32) is connected into the membrane filter tank (25).
2. The MBR-based system for recycling rural domestic sewage in the coastal region according to claim 1, wherein: a basket-lifting grid (111) is arranged in the grid water collecting tank (11).
3. The MBR-based system for recycling rural domestic sewage in the coastal region according to claim 2, wherein: the aerobic tank (23) is internally provided with a rope-type filler and a microporous aeration disc (231), and the membrane filter tank (25) is internally provided with an MBR (251).
4. The MBR-based system for recycling rural domestic sewage in the coastal region according to claim 3, wherein: the sedimentation tank (24) is connected with the water reuse tank (31) through a lifting pump and a pipeline.
5. The MBR-based system for recycling rural domestic sewage in the coastal region according to claim 4, wherein: an aeration head is arranged at the lower part of the MBR (251).
6. The MBR-based system for recycling rural domestic sewage in the coastal region according to claim 5, wherein: the sedimentation tank (24) is connected with the sludge storage tank (4).
7. The MBR-based coastal area rural domestic sewage reuse system according to any one of claims 1 to 6, characterized in that: a carbon source storage tank (5) is connected to the outside of the anoxic tank (22); the outside of the aerobic tank (23) is connected with a PAC flocculating agent storage tank (6).
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| CN202120748404.4U CN214571415U (en) | 2021-04-13 | 2021-04-13 | Rural domestic sewage recycling system in coastal area based on MBR |
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| CN202120748404.4U CN214571415U (en) | 2021-04-13 | 2021-04-13 | Rural domestic sewage recycling system in coastal area based on MBR |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117401852A (en) * | 2023-11-09 | 2024-01-16 | 西藏净源环保工程有限公司 | Bury formula sled dress integrated sewage treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117401852A (en) * | 2023-11-09 | 2024-01-16 | 西藏净源环保工程有限公司 | Bury formula sled dress integrated sewage treatment device |
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