CN107522360B - Sewage collection and treatment system discharged into river channel - Google Patents
Sewage collection and treatment system discharged into river channel Download PDFInfo
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- CN107522360B CN107522360B CN201710841472.3A CN201710841472A CN107522360B CN 107522360 B CN107522360 B CN 107522360B CN 201710841472 A CN201710841472 A CN 201710841472A CN 107522360 B CN107522360 B CN 107522360B
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- 238000007689 inspection Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims description 68
- 239000007788 liquid Substances 0.000 claims description 22
- 239000010802 sludge Substances 0.000 claims description 21
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Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- 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
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The application relates to a sewage collection and treatment system discharged into a river channel, which comprises a sewage treatment system, a sewage collection system and an ecological restoration system arranged in the river channel, wherein a sewage discharge port is communicated and connected with the sewage collection system, the sewage collection system comprises a sewage pipeline inspection well, a sewage collection branch pipe, a sewage collection main pipe and a inverted siphon well, a plurality of sewage collection branch pipes are respectively communicated and connected with the sewage collection main pipe through the inverted siphon well, a plurality of sewage discharge ports are respectively communicated and connected with the sewage collection branch pipes through the sewage pipeline inspection well, the sewage treatment system comprises a grid lifting well, an overflow water collecting tank and a sewage treatment process tank, wherein the grid lifting well, the overflow water collecting tank and the sewage treatment process tank are sequentially connected in series through pipelines, a sewage collecting main pipe is connected with the grid lifting well in a communicating manner, the sewage treatment process tank is connected with a sewage treatment rear discharge pipe in a communicating manner, and water treated by the sewage treatment process tank is discharged to an ecological restoration system arranged in a river channel through the sewage treatment rear discharge pipe.
Description
Technical Field
The invention relates to a sewage treatment system, in particular to a sewage collection and treatment system discharged into a river channel.
Background
Aiming at sewage generated by residents, enterprises and the like along the river, the sewage is often discharged into the river water body at will through a sewage drain outlet, and the site is often inconvenient to lay a sewage collecting pipeline on the bank so as to achieve the purpose of intercepting the sewage nano tube.
For both sides of river channel the pollution of the sewage outlet is avoided, at present, the treatment is only carried out through simple interception and ecological restoration measures. The common interception modes include simple interception of constructing a gate retaining dam, planting aquatic plant interception belts, artificial floating islands and the like. The construction of the gate retaining dam is not only high in cost, but also unfavorable for flood prevention and drought resistance, but also changes the original 'live water' into 'dead water', not only the sewage intercepted by the gate is not well purified, the original fragile river channel ecological system is also very easy to destroy; the measure of intercepting pollution by planting aquatic plants is not only not suitable for a river channel with deeper water depth, but also cannot resist larger pollution load; the interception technology of the artificial floating island is also limited in the area of the floating island and the capability of absorbing and purifying pollutants by plants, so that the water quality can not be purified fundamentally and greatly; the ecological restoration engineering is implemented in the river channel, which is only a restoration means, and has certain effect on restoration of slightly polluted water in the river channel, but can not realize enhanced purification treatment on the sewage discharged into the river channel, and has no function of enhanced sewage treatment. In addition, if sewage treatment facilities are built in the river channel, the functions of flood control and drainage, landscape entertainment, ecological environment and the like of the river channel are deprived.
Disclosure of Invention
The invention aims to solve the defects in the background technology and provides a sewage collecting and treating system discharged into a river channel.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a sewage collection and processing system who discharges into river course, includes sewage collecting system, sewage treatment system and sets up ecological restoration system in the river course, and the sewage discharge port is connected with sewage collecting system intercommunication, sewage collecting system includes sewage pipeline inspection shaft, sewage collection branch pipe, sewage collection main pipe, falls the siphon well, and a plurality of sewage collection branch pipes are connected with sewage collection main pipe intercommunication through falling the siphon well respectively, and a plurality of sewage discharge ports are connected with sewage collection branch pipe intercommunication through sewage pipeline inspection shaft respectively, sewage treatment system includes grid lifting well, overflow catch basin, sewage treatment process pond, and grid lifting well, overflow catch basin, sewage treatment process pond loop through pipeline concatenate, sewage collection main pipe and grid lifting well intercommunication are connected, and sewage treatment process pond intercommunication is connected with the discharge pipe behind the sewage treatment, and the water after sewage treatment process pond treatment is discharged to the ecological restoration system who sets up in the river course through the discharge pipe.
For the optimization of the invention, the ecological restoration system consists of a river channel aeration system, MBR membrane type microorganism enrichment and domestication equipment, aquatic animals, plants and the like.
For the optimization of the invention, the grating and the lifting pump A are arranged in the grating lifting well, the grating is obliquely erected in the grating lifting well, the sewage collecting main pipe is communicated and connected with the grating lifting well on one side of the grating, the lifting pump A is arranged at the bottom of the grating lifting well on the other side of the grating, and the water outlet of the lifting pump A is communicated and connected with the overflow water collecting tank through a pipeline.
For the optimization of the invention, a lifting pump B and a lifting pump C are arranged in the overflow water collecting tank, an overflow pipe A and an overflow pipe B which are communicated and connected and distributed up and down are arranged on the outer side of the overflow water collecting tank, the lifting pump B is arranged in the middle of the overflow water collecting tank, the water outlet of the lifting pump B is communicated and connected with the overflow pipe A positioned at a high position, the lifting pump C is arranged at the bottom of the overflow water collecting tank, and the water outlet of the lifting pump C is communicated and connected with the sewage treatment process tank through a pipeline.
For the optimization of the invention, a liquid level control meter A and a liquid level control meter B are respectively arranged on a pipeline between a lifting pump B and an overflow pipe A in the overflow water collecting tank and a pipeline between a lifting pump C and a sewage treatment process tank.
For one optimization of the invention, the liquid level control meter A and the liquid level control meter B are respectively arranged in parallel with the overflow pipe B at the low position.
For the optimization of the invention, the sewage treatment process tank comprises an anaerobic reaction tank, an anoxic reaction tank, an aerobic reaction tank, an MBR reaction tank and a clean water tank, and sewage sequentially flows through the anaerobic reaction tank, the anoxic reaction tank, the aerobic reaction tank, the MBR reaction tank and the clean water tank; the MBR reaction tank is provided with a sludge return pipe and a sludge discharge port, one part of sludge accumulated in the MBR reaction tank is returned to the anaerobic reaction tank through the sludge return pipe, and the other part of sludge is discharged from the sludge discharge port of the MBR reaction tank; one end of the water outlet of the aerobic reaction tank is provided with an internal circulation system return pipe which is communicated with the anaerobic reaction tank, and a discharge port of the clean water tank is communicated with the ecological restoration system.
For the optimization of the invention, a fan is arranged at one side of the MBR reaction tank.
Compared with the background technology, the invention solves the problems that the engineering of laying the sewage pipe network on the bank can not be realized, the sewage pipe network system is laid along the river bank in the river course, and the invention can uniformly collect and treat the sewage discharged from the sewage outlets distributed along the two sides of the river course before the sewage is discharged into the river course, thereby avoiding pollution sources; the overflow water collecting tank is mainly aimed at a confluence drainage system, and can overflow collected rainwater when the drainage amount is large, so that sewage treatment facilities are not affected by impact load. The water is discharged to the river after being treated by the sewage treatment system, and then the water is subjected to the river water strengthening and purifying treatment, so that the water quality can be improved to a higher water quality standard, the river can meet the function and landscape requirements, and a good river water environment is created.
Drawings
FIG. 1 is a schematic block diagram of a sewage collection and treatment system for discharging into a river.
Fig. 2 is a schematic diagram of a sewage treatment system.
FIG. 3 is a schematic flow diagram of a wastewater treatment process tank.
Detailed Description
Example 1: reference is made to fig. 1-3. The utility model provides a sewage collection and processing system who discharges into river course, includes sewage collection system 1, sewage treatment system 2 and sets up ecological restoration system 21 in river course 4, and sewage discharge port 3 and sewage collection system 1 intercommunication are connected, sewage collection system 1 includes sewage pipeline inspection shaft 5, sewage collection branch pipe 6, sewage collection main pipe 7, fall siphon well 22, and a plurality of sewage collection branch pipes 6 are respectively through falling siphon well 22 and sewage collection main pipe 7 intercommunication connection, and a plurality of sewage discharge ports 3 are respectively through sewage pipeline inspection shaft 5 and sewage collection branch pipe 6 intercommunication connection, sewage treatment system 2 includes grid lift well 8, overflow catch basin 9, sewage treatment technology pond 10, and grid lift well 8, overflow catch basin 9, sewage treatment technology pond 10 are in proper order through the pipeline concatenate, sewage collection main pipe 7 and grid lift well 8 intercommunication are connected, and sewage treatment technology pond 10 intercommunication is connected with sewage treatment back drain pipe 20, and the water after sewage treatment technology pond 10 handles is discharged to ecological restoration system 21 that sets up in river course 4 through sewage treatment back drain pipe 20. The sewage treatment process tank 10 comprises an anaerobic reaction tank 11, an anoxic reaction tank 12, an aerobic reaction tank 13, an MBR reaction tank 14 and a clean water tank 15, and sewage sequentially flows through the anaerobic reaction tank 11, the anoxic reaction tank 12, the aerobic reaction tank 13, the MBR reaction tank 14 and the clean water tank 15; the MBR reaction tank 14 is provided with a sludge return pipe 17 and a sludge discharge port 18, a part of sludge accumulated in the MBR reaction tank 14 is returned to the anaerobic reaction tank 11 through the sludge return pipe 17, and the other part of sludge is discharged from the sludge discharge port 18 of the MBR reaction tank 14; the water outlet end of the aerobic reaction tank 13 is provided with an internal circulation system return pipe 16 which is communicated with the anaerobic reaction tank 11, and the discharge port of the clean water tank 15 is communicated with an ecological restoration system 21 so as to further strengthen the water quality. A fan 141 is provided at one side of the MBR reaction tank 14. The ecological restoration system 21 is composed of a river channel aeration system 211, MBR membrane type microorganism enrichment and domestication equipment 212 and aquatic animals and plants 213.
The grid lifting well 8 is internally provided with a grid 81 and a lifting pump A82, the grid 81 obliquely stands in the grid lifting well 8, the sewage collecting main pipe 7 is communicated and connected with the grid lifting well 8 on one side of the grid 81, the lifting pump A82 is arranged at the bottom of the grid lifting well 8 on the other side of the grid 81, and a water outlet of the lifting pump A82 is communicated and connected with the overflow water collecting tank 9 through a pipeline. The overflow water collecting tank 9 is internally provided with a lifting pump B91 and a lifting pump C92, the outer sides of the lifting pump B91 are provided with overflow pipes A93 and B94 which are connected in a communicating way and distributed up and down, the lifting pump B91 is arranged in the middle of the overflow water collecting tank 9, the water outlet of the lifting pump B91 is connected with the overflow pipe A93 positioned at a high position in a communicating way, the lifting pump C92 is arranged at the bottom of the overflow water collecting tank 9, and the water outlet of the lifting pump C92 is connected with the sewage treatment process tank 10 in a communicating way through a pipeline. A liquid level control meter A95 and a liquid level control meter B96 are respectively arranged on a pipeline between the lifting pump B91 and the overflow pipe A93 in the overflow water collecting tank and a pipeline between the lifting pump C92 and the sewage treatment process tank 10. The liquid level control meter A95 and the liquid level control meter B96 are respectively arranged flush with the overflow pipe B94 at the low position.
The sewage collecting and treating system generally adopts HDPE or PE pipes, and the pipe diameter is generally DN140 or DN225 depending on the water amount. The pipeline is laid along the river, concrete piers are arranged below the pipeline at intervals, prefabricated round hole plates are arranged between the piers to support the pipeline, and the pipeline is subjected to concrete covering treatment. The sewage inspection well adopts a phi 600 brick-built round launder well or a 500X500 brick-built square launder well. Inverted siphon well 12 employs a mud pit of the type described above. The sewage lifting pump is arranged in the grid lifting well 8, so that sewage can be lifted into the subsequent overflow water collecting tank 9. And a stainless steel grating is arranged in the prompt well and is used for intercepting garbage sundries with larger volume and the like. And a lifting pump B91, a lifting pump C92 and a set of liquid level control system are arranged in the overflow water collecting tank 9. When the liquid level is lower than the inlet of the overflow pipe A93, the lifting pump C92 connected with the sewage treatment process pool pipeline is operated, the lower-layer sewage is lifted to the sewage treatment process pool by the lifting pump C92 for treatment, and the upper-layer liquid is discharged from the overflow pipe B94; when the liquid level reaches a level above the inlet of the overflow pipe A93, the lift pump B91 connected with the overflow pipe A is operated, and the upper liquid is discharged from the overflow pipe A93.
The river aeration system adopts microporous aeration equipment, and dissolved oxygen and black and odorous substances (such as H) which are generated by aeration and enter the water body 2 S, feS, etc.) and the like, and the contaminant substances are purified by oxidation-reduction reaction. The microporous aerator consists of a submerged air blower, an aeration main pipe, an aeration branch pipe, an aeration disc and the like. The aeration equipment has high oxygen utilization rate, EA=14-25% and power efficiency of 2kgO 2 And the method can rapidly provide an aerobic environment above/kW.h, promote the metabolism of microorganisms, ensure the stronger self-cleaning capability of the water body and can cope with the impact of sudden pollution of the river channel. The aeration pipeline is paved at the middle position of the upstream, the middle and the downstream river surfaces of the river channel.
The bioremediation system consists of an MBR membrane type microorganism enrichment and domestication system and a biological bed system. The MBR membrane type microorganism enrichment and domestication system utilizes the effective interception function of a biological membrane to isolate microorganisms in river water to be treated into an incubator, so that the microorganisms, suspended solids and liquid are thoroughly separated, all indigenous microorganisms in the river water can stay in the incubator for a long time, the loss along with water outlet in the enrichment process is avoided, and the enrichment efficiency of indigenous flora is greatly improved. The biological bed provides a huge biological adhesion surface for the growth and propagation of aerobic indigenous microorganisms, beneficial algae and the like in the river channel by utilizing the characteristics of a medium carrier, and selects dominant microorganism populations and helps the growth and propagation of the dominant microorganism populations by utilizing a bioengineering principle and an accurately designed aquatic inert matrix. The MBR membrane type microorganism enrichment and domestication system adopts a set of MBR membrane type microorganism enrichment and domestication system which is arranged at the upstream of the river water quality strengthening system. The biological beds are arranged at intervals of 10-20 meters along the two sides of the river, and the size of each biological bed is 5m x 2m.
The aquatic plant system consists of planted emergent aquatic plants, floating leaf plants and submerged plants. According to the requirements of stain resistance, landscapes, easy management and the like, the species are selectively configured to form a plant community which is evergreen all the year round and has season replacement. The aquatic plants have no strict division among varieties, mainly purifying water and landscape effect, and gradually adjusting the water quality and landscape effect. The emergent aquatic plants are planted along the two sides of the river by adopting reed leaves, canna, flowers, iris and the like. The floating leaf plants mainly comprise water lily, nuphar and the like, and the planting areas are beside bridges and culverts and at key nodes. The submerged plants are planted by mixing submerged plants such as hydrilla verticillata, bitter grass, and Isodon japonicus, and are planted at a certain distance along the two sides of the river.
The application has the following beneficial effects:
1) The pipe network collecting system aims at the projects that a sewage pipe network cannot be paved on the bank, the sewage pipe network system is paved along the river bank in the river course, and the sewage discharged from the sewage outlets distributed along the two banks of the river course can be uniformly collected before being discharged into the river course, so that pollution sources are avoided;
2) The water collecting overflow well can well solve the problem of sewage treatment of rainwater and sewage converging;
3) The sewage treatment system can adopt different kinds of sewage treatment processes aiming at various sewage in an open river channel so as to achieve the effect of water quality pretreatment, remove most or even all pollutants, and greatly improve the sewage quality. The sewage treatment process can improve the quality of the effluent to the first-level A emission standard of pollutant emission standard of urban sewage treatment plants (GB 18918-2002), and greatly lighten the influence on river water bodies;
4) The water is discharged to the river after being treated by the sewage treatment system, and then the water is subjected to the river water strengthening and purifying treatment, so that the water quality can be improved to a higher water quality standard, the river can meet the function and landscape requirements, and a good river water environment is created.
Example 2: reference is made to fig. 1-3. The specific application scheme is as follows:
a section of river channel with the length of 100 meters and the width of 14 meters close to residential areas is not polluted, the water quality of the upstream section of the river channel is basically maintained at the V class level of the surface water environment quality standard (GB 3838-2002), the river channel water quality of the residential area is very serious because the residential domestic sewage is directly discharged into the river channel through the sewage drain, and the black and odorous phenomenon of the river channel is caused, and the water environment quality of the downstream river channel is seriously influenced. The upstream and downstream water quality results of the river channel before treatment are detected as follows:
in order to control the pollution problem of the sewage discharge ports, ecological restoration is implemented on the river channel, the existing problems are remedied, and the treatment measures are as follows:
1. sewage collection system
1) Arranging a sewage inspection well at a river sewage outlet, wherein the sewage inspection well is a phi 600 brick circular inspection well, and 8 sewage inspection wells are built by adopting phi 600 bricks in total; concrete solid bricks (the same applies below) are selected as the brickwork;
2) Sewage pipelines are paved in the river course along the two sides of the river, the sewage pipeline adopts a DN225HDPE pipe, and the total use of the DN225 pipe pipeline is 220 meters;
3) A YKB5 hole precast slab is arranged below the pipeline to support, and the sewage pipeline is subjected to square covering treatment, wherein the square covering amount is that 200mm thick C20 concrete is respectively added to the upper part, the left part and the right part of the pipe diameter, a C20 concrete buttress is arranged below the precast slab at intervals of 3 meters to support the pipeline, and the buttress foundation adopts rubble concrete and totally adopts 60 buttress seats;
4) And the sewage is uniformly collected to the grid lifting well in a form of 2 phi 600 brick inverted rainbow wells at the positions where the pipelines on two sides of the river need to span and concentrate;
5) The grid lifting well is internally provided with a sewage lifting pump, so that sewage can be lifted into a subsequent overflow water collecting tank. A stainless steel grating is arranged in the prompt well and is used for intercepting garbage sundries with larger volume and the like; the grid well adopts a bricked structure with the size of LbH=2.5m2, and the grid adopts a finished stainless steel material with the size of LbB=2.8m;
6) The grid lifting well lifting pump lifts sewage into an overflow water collecting tank, and the overflow water collecting tank is in cast-in-situ by adopting C25 steel-concrete, wherein the size of the overflow water collecting tank is LXBXH=4mX 7mX3 m. 2 sewage pumps and a liquid level control system are arranged in the overflow water collecting tank, wherein the liquid level control system is disclosed in CN204759216U or CN 204331485U.
2. Sewage treatment system
The sewage treatment system is arranged at one side of the river channel, and sewage is lifted into the sewage treatment process pool by the lifting pump of the overflow water collecting pool. The water quality of the effluent treated by the sewage treatment system reaches the first grade A standard of pollutant emission standard of urban sewage treatment plant (GB 18918-2002). The process sequentially comprises an anaerobic reaction tank, an anoxic reaction tank, an aerobic reaction tank, an MBR reaction tank and a clean water tank. The process flow is as follows: sewage flows through the anaerobic reaction tank, the anoxic reaction tank, the aerobic reaction tank, the MBR reaction tank and the clean water tank in sequence; the MBR reaction tanks are respectively provided with sludge which flows back to the anaerobic reaction tank, and the residual sludge is discharged from a sludge discharge port of the MBR reaction tank; and the mixed solution of the aerobic reaction tank flows back to the anaerobic reaction tank through an internal circulation system. The average value of the water quality of the treated effluent is as follows: 48.2mg/L of chemical oxygen demand, 4.75mg/L of ammonia nitrogen and 0.95mg/L of total phosphorus, and the treated water is discharged from the clean water tank.
1) The main function of the anaerobic reaction tank is to release phosphorus and simultaneously ammonify part of organic matters;
2) The anoxic reaction tank has the primary function of denitrification, nitrate nitrogen is sent from the aerobic reaction tank through internal circulation, and the circulating mixed liquid is large, generally 2Q (Q is the flow of raw sewage);
3) An aerobic reaction tank-an aeration tank, wherein the reaction unit is multifunctional and removes BOD 5 Both nitrification and absorption of phosphorus and the like are performed here. The mixed solution with the flow rate of 2Q flows back to the anoxic reaction tank from the mixed solution;
4) The MBR reaction tank, namely a membrane-biological reaction tank, mainly comprises an MBR membrane and an aeration device. The mixed liquid in the MBR reaction tank is filtered by a membrane component and then discharged through a water outlet pipe;
5) And (3) the effluent of the MBR reaction tank enters a clean water tank and finally is discharged into a river channel.
3. An ecological restoration area with the length of 140 meters is arranged at the downstream of the water outlet of the sewage treatment system.
1) 30 biological beds are arranged in the ecological restoration area, each biological bed is 2m long and 1 m wide and is arranged at two sides of a river channel at intervals of 5m, and the specific structure of the biological beds can be seen from the disclosure of CN201450931U patent. The biological bed is composed of a plurality of floating disc units, and the floating disc units comprise floating discs, planting baskets and connecting buckles. The biological bed is internally provided with combined fillers, the diameter of the combined fillers is 140mm, the distance is 100mm, and 4 groups of combined fillers are arranged in each floating disc system. Canna and halofop-butyl are planted in the planting basket, and the planting density is 40 plants per square meter;
2) 2 sets of 1.5kwTSW type submerged air blower aeration equipment are arranged in the ecological restoration area. Dissolved oxygen and black and odorous substances (such as H) entering the water body generated by aeration 2 S, feS, etc.) to cause oxidation-reduction reaction, thereby purifying the pollutants;
3) An MBR membrane type microorganism enrichment and domestication system 1 set is arranged in an ecological restoration area;
4) Aquatic plants are planted at the coasts at the two sides of the river channel, three submerged plants such as hydrilla verticillata, bitter grass, and waterweed are selected for mixed planting in the project to construct a coastal ecological chain, and the planting density is 25 per square meter and 6 per square meter; the height is 30-40cm, and the planting width is 0.5 m;
5) Screw, freshwater mussel and earthworm are put in the later period of treatment, and the put-in amount is 1000m each 3 Water bodyIn (2), 14-25kg are put in.
After the implementation period of six months, all indexes of the downstream water quality of the river channel are obviously reduced and are approximately stable. The stable river channel water quality index parameters are shown in the following table:
the water quality is obviously improved and improved through treatment; meanwhile, the river channel ecological system is recovered, and a good river channel water environment is created for the river channel in the area.
It should be understood that: although the present invention has been described in more detail in this embodiment, these descriptions are merely illustrative of the invention and not limiting, and any invention that does not depart from the spirit of the invention falls within the scope of the invention.
Claims (5)
1. A sewage collection and treatment system discharged into a river is characterized by comprising a sewage collection system (1), a sewage treatment system (2) and an ecological restoration system (21) arranged in the river (4), wherein a sewage discharge outlet (3) is communicated and connected with the sewage collection system (1), the sewage collection system (1) comprises a sewage pipeline inspection well (5), a sewage collection branch pipe (6), a sewage collection main pipe (7) and a inverted siphon well (22), a plurality of sewage collection branch pipes (6) are respectively communicated and connected with the sewage collection main pipe (7) through the inverted siphon well (22), a plurality of sewage discharge outlets (3) are respectively communicated and connected with the sewage collection branch pipe (6) through the sewage pipeline inspection well (5), the sewage treatment system (2) comprises a grid lifting well (8), an overflow water collecting tank (9) and a sewage treatment process tank (10) which are sequentially connected in series through pipelines, the sewage collection main pipe (7) is communicated and connected with the grid lifting well (8), a sewage treatment process tank (10) is communicated and connected with a sewage treatment post-sewage discharge pipe (20) through the sewage pipeline inspection well (5) and the sewage collection main pipe (6) which is communicated and connected with the sewage treatment main pipe (2) through the overflow water collection system (9) through the overflow water collection tank (10), a lifting pump B (91) and a lifting pump C (92) are arranged in the overflow water collecting tank (9), overflow pipes A (93) and B (94) which are connected in a communicating way and distributed up and down are arranged on the outer side of the overflow water collecting tank, the lifting pump B (91) is arranged in the middle of the overflow water collecting tank (9), a water outlet of the lifting pump B is connected with the overflow pipe A (93) which is positioned at a high position in a communicating way, the lifting pump C (92) is arranged at the bottom of the overflow water collecting tank (9), a water outlet of the lifting pump C (92) is connected with the sewage treatment process tank (10) in a communicating way through a pipeline, a liquid level control meter A (95) and a liquid level control meter B (96) are respectively arranged on a pipeline between the lifting pump B (91) and the overflow pipe A (93) and a pipeline between the lifting pump C (92) and the sewage treatment process tank (10), and the liquid level control meter A (95) and the liquid level control meter B (96) are respectively arranged in a flush way with the overflow pipe B (94) which is positioned at a low position.
2. The system for collecting and treating sewage discharged into a river according to claim 1, wherein: the ecological restoration system (21) is composed of a river channel aeration system (211), MBR membrane type microorganism enrichment and domestication equipment (212) and aquatic animals and plants (213).
3. The system for collecting and treating sewage discharged into a river according to claim 1, wherein: grid (81) and elevator pump A (82) are arranged in grid elevator well (8), grid (81) obliquely stand in grid elevator well (8), sewage collection main pipe (7) is connected with grid elevator well (8) on one side of grid (81) in a communicating mode, elevator pump A (82) is arranged at the bottom of grid elevator well (8) on the other side of grid (81), and a water outlet of elevator pump A (82) is connected with overflow water collecting tank (9) in a communicating mode through a pipeline.
4. The system for collecting and treating sewage discharged into a river according to claim 1, wherein: the sewage treatment process tank (10) comprises an anaerobic reaction tank (11), an anoxic reaction tank (12), an aerobic reaction tank (13), an MBR reaction tank (14) and a clean water tank (15), wherein sewage flows through the anaerobic reaction tank (11), the anoxic reaction tank (12), the aerobic reaction tank (13), the MBR reaction tank (14) and the clean water tank (15) in sequence; the MBR reaction tank (14) is provided with a sludge return pipe (17) and a sludge discharge port (18), one part of sludge accumulated in the MBR reaction tank (14) is returned to the anaerobic reaction tank (11) through the sludge return pipe (17), and the other part of sludge is discharged from the sludge discharge port (18) of the MBR reaction tank (14); an inner circulation system return pipe (16) is arranged at one water outlet end of the aerobic reaction tank (13) and is communicated with the anaerobic reaction tank (11), and a discharge port of the clean water tank (15) is communicated with the ecological restoration system (21).
5. The system for collecting and treating sewage discharged into a river according to claim 4, wherein: a fan (141) is arranged at one side of the MBR reaction tank (14).
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| CN109626578A (en) * | 2019-02-19 | 2019-04-16 | 北京汇恒环保工程股份有限公司 | A kind of dirty intensive treatment system of river enclosure section |
| CN111285544A (en) * | 2020-02-20 | 2020-06-16 | 深圳市宏大建设集团有限公司 | River sewage source treatment method |
| CN114314846A (en) * | 2021-12-13 | 2022-04-12 | 河北恒特环保工程有限公司 | Novel ecological floating island for river and lake water body treatment |
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