CN111792798A - Rural domestic sewage combined type ecological purification system - Google Patents
Rural domestic sewage combined type ecological purification system Download PDFInfo
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- CN111792798A CN111792798A CN202010798292.3A CN202010798292A CN111792798A CN 111792798 A CN111792798 A CN 111792798A CN 202010798292 A CN202010798292 A CN 202010798292A CN 111792798 A CN111792798 A CN 111792798A
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Images
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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- 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
- C02F3/308—Biological phosphorus removal
-
- 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
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
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)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a rural domestic sewage combined type ecological purification system which comprises a water inlet well, a primary sedimentation tank and an aeration adjusting tank, wherein a grid is obliquely arranged in the primary sedimentation tank, the water outlets of the aeration adjusting tank are respectively connected in parallel with an artificial undercurrent wetland and a buried integrated sewage treatment device, the sludge outlets of the artificial undercurrent wetland and the buried integrated sewage treatment device are connected with a sludge tank, the water outlet of the buried integrated sewage treatment device is communicated with an integrated device produced water treatment system, and the water outlet of the integrated device produced water treatment system and the water outlet of the artificial undercurrent wetland are respectively communicated with a large pit. The invention can play a stable purifying effect all the year round, solves the problem that the existing rural constructed wetland treatment in winter does not reach the standard or is difficult to operate and manage, can be communicated with a matched sewage collecting pipe network in a village, solves the problem that the rural domestic sewage discharge does not reach the standard, discharges the treated water body into a nearby drainage ditch after reaching the standard or is used for farmland irrigation, fully utilizes water resources, and has remarkable ecological benefit.
Description
Technical Field
The invention relates to the technical field of domestic sewage treatment, in particular to a rural domestic sewage combined type ecological purification system.
Background
Along with the development of rural areas, the discharge of rural domestic sewage is increasing day by day. The domestic sewage in rural areas mainly comes from toilet flushing water, kitchen washing water, washing machine drainage, shower drainage and other drainage of peasant households. At present, most rural domestic sewage is directly discharged into the environment, so that the environment is greatly polluted, and foul smell can be generated, so that the treatment of the rural domestic sewage is very important.
The current rural domestic sewage treatment belongs to a project with serious difficulties for the following reasons: most rural areas are not provided with sewage treatment stations and household sewage pipes, and newly-built sewage pipes and sewage treatment stations have the problems of large occupied area, substandard sewage discharge and the like. And the treatment of rural domestic sewage also has the problems of regional dispersion, difficult collection and the like.
The existing rural domestic sewage treatment is mainly artificial wetland or mobile sewage treatment station. Although the treatment modes can realize the treatment of rural domestic sewage, the following problems exist:
1) the weather is cold in winter in the north, if the mode that adopts constructed wetland to handle can lead to the unable operation of constructed wetland, leads to winter domestic sewage to discharge not up to standard, appears winter environmental pollution's problem.
2) If the mobile sewage treatment station is adopted to treat domestic sewage, a large amount of capital needs to be invested at one time, and the annual treatment cost is high. And the mobile sewage treatment station carries out sewage treatment, and the ecological benefit is extremely low.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a rural domestic sewage combined type ecological purification system, which aims to solve the problems that the mode of treating the domestic sewage by adopting the artificial wetland can not run in winter and the domestic sewage is treated by adopting a movable sewage treatment station, so that a large amount of capital investment is needed and the ecological benefit is extremely low, so as to realize the centralized treatment of the rural domestic sewage, so that the rural domestic sewage can be effectively treated in time in winter, and the landscape, ecological and economic benefits are maximized.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
Rural domestic sewage combined type ecological purification system, include and link to each other the general inlet well that is used for letting in domestic sewage with rural internal supporting sewage collection pipe network, be linked together with the inlet well and be used for carrying out preliminary sedimentation's preliminary sedimentation tank to sewage and the aeration equalizing basin that is linked together with preliminary sedimentation tank's delivery port, the slope is provided with in the preliminary sedimentation tank and is used for carrying out preliminary filtration's grid to sewage, the delivery port of aeration equalizing basin parallel connection respectively is provided with and is used for carrying out physics to domestic sewage in the non-period of freezing, chemistry, biological triple coprocessing's artificial undercurrent wetland and be used for going on burying formula integration sewage treatment equipment in the period of freezing, artificial undercurrent wetland and bury formula integration sewage treatment equipment's outlet connection and be provided with the sludge impoundment, bury formula integration sewage treatment equipment's delivery port intercommunication and be provided with and be used for carrying out the disinfection treatment's of disinfecting to The equipment produced water treatment system, the water outlet of the integrated equipment produced water treatment system and the water outlet of the artificial subsurface flow wetland are respectively communicated with a large pit for collecting standard water.
Further optimize technical scheme, bury formula integration sewage treatment device including linking gradually the UNICOM be used for with the suspension pollutant in the sewage and the anaerobism pond of soluble organic matter hydrolysis for organic acid, be arranged in utilizing organic pollutant in the sewage as the carbon source come the oxygen deficiency pond that denitrogenates sewage and be arranged in utilizing aerobic microorganism metabolism effect to carry out the biological contact oxidation pond of getting rid of with organic matter in the sewage, biological contact oxidation pond intercommunication is provided with the delivery port and is linked together with integration equipment product water processing system, and the mud outlet is linked together with the sludge impoundment, a secondary sedimentation tank a for carrying out mud-water separation, the delivery port of aeration equalizing basin is linked together with the water inlet of anaerobism pond.
Further optimizing the technical scheme, the biological contact oxidation pond comprises an aerobic pond of which the bottom end is provided with a biological contact oxidation pond aeration pipe and a membrane pond of which the inside is filled with filler, the filler is fully distributed with a biological membrane formed by a plurality of aerobic microorganisms, and the membrane pond is also internally provided with a membrane connecting assembly aeration pipe.
Further optimize technical scheme, bury formula integration sewage treatment device still includes the fan room, is provided with in the fan room and is linked together with biological contact oxidation pond aeration pipe and is used for to the good oxygen pond fan of carrying oxygen in the good oxygen pond and connect membrane module aeration pipe to link to each other and be general in the membrane tank fan of carrying oxygen in the membrane tank.
Further optimize technical scheme, be provided with in the aerobic tank and be used for transporting away the mud discharge mechanism of the mud that the aerobic tank is interior to deposit, mud discharge mechanism is with mud discharge farmland or gardens behind the compost.
Further optimizing the technical scheme, the other sludge outlet of the secondary sedimentation tank a is communicated with the anaerobic tank through a pipeline.
Further optimize technical scheme, be provided with between formula of burying integration sewage treatment device and the integration equipment product water processing system and be used for washing the pipeline system is washed to the membrane medicine that carries out medicine from secondary sedimentation tank a separation back rivers.
The technical scheme is further optimized, the artificial subsurface flow wetland comprises a base layer, a secondary sedimentation tank b communicated with a water outlet of the aeration regulating tank, an aeration tank communicated with a water outlet of the secondary sedimentation tank b and the subsurface flow wetland communicated with a water outlet of the aeration tank are arranged above the base layer, and the water outlet of the subsurface flow wetland is communicated with the sludge tank.
Further optimize technical scheme, the undercurrent wetland is including the first rubble layer, second rubble layer, third rubble layer and the zeolite layer that the layering was laid in proper order, and the top on first rubble layer, second rubble layer, third rubble layer and zeolite layer is provided with the clay protective layer, and the top of clay protective layer is provided with the vegetable layer, and the delivery port end of undercurrent wetland carries out rivers through the runner layer and carries out the rivers transport.
Further optimizing the technical scheme, a hair collector is arranged at the water outlet of the aeration regulating tank.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
The invention can exert stable purification effect all the year round, solve the problem that the existing rural constructed wetland treatment in winter does not reach the standard or is difficult to operate and manage, and can exert stronger ecological landscape benefit compared with the traditional sewage treatment station.
The invention can also solve the problem of domestic sewage treatment in parks, scenic spots and centralized residential areas, has certain landscape appearance and gives consideration to ecological benefits and landscape benefits.
The invention belongs to one-time investment, the daily operation cost is most comprehensively saved, the occupied area of the field is reduced to the maximum extent, and the use advantage is obvious.
The artificial subsurface flow wetland and the buried integrated sewage treatment equipment are respectively connected with the water outlet of the aeration regulating tank in parallel, so that sewage treatment can be realized by using the artificial subsurface flow wetland in the non-freezing period and the buried integrated sewage treatment equipment in the freezing period, and further the device can perform efficient sewage treatment in winter, and the applicability of the device is stronger.
The biological contact oxidation process is characterized in that: the process flow is simple, the operation is convenient, the sludge expansion is not generated, and the impact load resistance is strong. Especially, the biological film on the filler contains a large amount of various microorganisms, and a stable ecosystem and a biological chain are formed, so that the treatment efficiency is high, the tank volume is reduced, and the occupied area is reduced. Especially for organic wastewater with higher concentration, when the organic wastewater is used together with a hydrolytic acidification technology in an anoxic process and a contact oxidation tank adopts multi-grid serial operation, the sufficient retention time of the sewage can be easily realized, so that an ideal treatment effect can be obtained, and the quality of effluent is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial schematic structural view of the present invention;
FIG. 3 is a top view of the buried integrated sewage treatment plant of the present invention;
FIG. 4 is a sectional view taken along line 1-1 of FIG. 3 according to the present invention;
FIG. 5 is a top view of the artificial subsurface wetland of the invention;
FIG. 6 is a sectional view taken along line 1-1 of FIG. 5 in accordance with the present invention;
FIG. 7 is a schematic view showing the structure of a sludge tank according to the present invention;
FIG. 8 is a sectional view taken along line 2-2 of FIG. 7 in accordance with the present invention;
FIG. 9 is a schematic structural view of a membrane drug washing pipeline system according to the present invention;
FIG. 10 is a schematic structural diagram of the water treatment system of the integrated equipment of the present invention.
Wherein: 1. an inlet well, 14, an inlet well inlet pipe, 15, a first cover plate, 16, a pre-buried steel plate, 17, a manual hoist, 2, a grid, 21, a second cover plate, 22, a water through hole pipe, 3, a primary sedimentation tank, 31, a water through hole, 4, an aeration adjusting tank, 41, a lift pump, 42, a third cover plate, 43, a pipe support, 44, a conditioning tank outlet pipe, 45, a rigid waterproof jacket, 5, a hair collector, 6, an artificial subsurface wetland, 61, a first crushed stone layer, 62, a second crushed stone layer, 63, a third crushed stone layer, 64, a zeolite layer, 65, a clay protective layer, 66, a medium coarse sand cushion layer, 67, a duckbill valve, 68, a water collecting pipe, 69, a runner layer, 610, a secondary sedimentation tank b, 611, an aeration tank, 612, a vegetation layer, 7, a sludge tank, 71, a fourth cover plate, 8, a buried integrated sewage treatment device, 81, an anaerobic tank, 82, an anoxic tank, 83. the system comprises a biological contact oxidation tank, 831, an aerobic tank, 832, a membrane tank, 84, an aerobic tank fan, 85, a membrane tank fan, 87, a biological contact oxidation tank aeration pipe, 88, a membrane connecting component aeration pipe, 9, a membrane drug washing pipeline system, 91, a water tank, 92, a dilution pump, 93, a mixing pipeline, 94, a pipeline mixer, 95, a drug washing tank, 96, a drug washing pump, 10, an integrated equipment produced water treatment system, 101, a first suction pump, 102, a second suction pump, 103, a pressure gauge, 104, an ultraviolet sterilizer, 105, an electromagnetic flowmeter, 106, a sewage inspection well, 107, a check valve, 108, a ball valve, 11, a large pit, 12, a sludge discharge mechanism, 121, a sewage discharge pump, 122, a septic tank, 13 and a secondary sedimentation tank a.
Detailed Description
The invention will be described in further detail below with reference to the figures and specific examples.
A rural domestic sewage combined type ecological purification system is shown by combining figures 1 to 10 and comprises a water inlet well 1, a primary sedimentation tank 3, an aeration adjusting tank 4, a grating 2, an artificial subsurface wetland 6, a buried integrated sewage treatment device 8, a sludge tank 7, an integrated device produced water treatment system 10 and a large pit 11.
The water inlet well 1 is communicated with a matched sewage collecting pipe network in the rural area and is used for introducing domestic sewage. A water inlet pipe 14 of the water inlet well is arranged on the transverse side wall of the water inlet well 1, a first cover plate 15 is covered above the water inlet well 1, and the first cover plate 15 is a galvanized steel cover plate.
A plurality of embedded steel plates 16 are transversely arranged on the inner side wall of the joint of the water inlet well 1 and the preliminary sedimentation tank 3. A water hole pipeline 22 is arranged at the joint of the water inlet well 1 and the preliminary sedimentation tank 3. The top of inlet well 1 is provided with the reservation hole, is provided with manual headstock gear 17 in the reservation hole, and the bottom of manual headstock gear 17 is provided with the connecting rod, and the connecting rod activity passes pre-buried steel sheet 16, and the bottom of connecting rod is provided with and is used for making water hole pipeline 22 open when the staff starts manual headstock gear 17, makes the valve that water hole pipeline 22 closed when the staff closes manual headstock gear 17.
The preliminary sedimentation tank 3 is communicated with the water inlet well 1 and is used for preliminary sedimentation of sewage. The slope is provided with in the preliminary sedimentation tank 3 and is used for carrying out prefilter's grid 2 to sewage, and the grid 2 of setting can filter large granule impurity in the sewage. The grating 2 in the invention adopts a basket type grating. A second cover plate 21 is covered above the preliminary sedimentation tank 3, and the second cover plate 21 is a galvanized steel cover plate.
The design parameters of the primary sedimentation tank are as follows:
size: 2X 10X 1.9 m;
residence time: 3.0 h;
the structural form is as follows: an underground grouted stone structure;
the main equipment is as follows: the basket is provided with one grid, the gap between the grid bars is 10mm, and the grid is made of stainless steel. The aeration device 1 is provided.
The aeration adjusting tank 4 is communicated with the water outlet of the primary sedimentation tank 3. The aeration adjusting tank 4 is communicated with the primary sedimentation tank 3 through a water hole 31. A lift pump 41 is arranged in the aeration adjusting tank 4, and the domestic sewage can be conveyed under the action of the lift pump.
A third cover plate 42 is covered on the upper part of the aeration regulating tank 4, and the third cover plate 42 is a galvanized steel cover plate. The lift pump is connected with a gas regulating pool water outlet pipeline 44, the gas regulating pool water outlet pipeline 44 is fixedly arranged on the side wall of the aeration regulating pool 4 through a pipeline bracket 43, and a rigid waterproof sleeve 45 is arranged at the joint of the gas regulating pool water outlet pipeline 44 and the side wall of the aeration regulating pool 4.
The design parameters of the aeration regulating tank 4 are as follows:
size: 1.3X 10X 1.7 m;
the structural form is as follows: underground masonry structure.
The water outlets of the aeration regulating tank 4 are respectively connected in parallel with an artificial subsurface wetland 6 and a buried integrated sewage treatment device 8.
A hair collector 5 is arranged at the water outlet of the aeration adjusting tank 4, and the hair collector 5 is used for collecting and treating the hair in the domestic sewage.
The buried integrated sewage treatment equipment 8 is used for treating domestic sewage in the freezing period. The buried integrated sewage treatment equipment 8 comprises an anaerobic tank 81, an anoxic tank 82 and a biological contact oxidation tank 83 which are sequentially communicated. The buried integrated sewage treatment equipment 8 is a sewage treatment device which takes carbon steel and glass fiber reinforced plastic as main materials, and the purpose of the buried integrated sewage treatment equipment is mainly that domestic sewage and industrial wastewater can reach the purpose requirement of user discharge or reuse after passing through the equipment.
The A/A/O process connects the front anaerobic section, the anoxic section and the rear aerobic basic oxidation section in series.
The anaerobic tank 81 is used for hydrolyzing suspended pollutants and soluble organic matters in the sewage into organic acids. And DO in the anaerobic section is not more than 0.2mg/L, heterotrophic bacteria in the anaerobic section hydrolyze suspended pollutants and soluble organic matters in the sewage into organic acid, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, and phosphorus in water is released in advance by utilizing the effects of anaerobic phosphorus release and aerobic excess phosphorus absorption of phosphorus accumulating bacteria to pretreat a subsequent phosphorus removal unit.
The design parameters of the anaerobic tank are as follows:
designing flow: 22m3/d；
The structural form is as follows: steel corrosion prevention (integrated equipment combined pool);
residence time: 2H;
the matching quantity is as follows: 1 seat.
And (3) combined filling:
the model is as follows: phi 150 multiplied by 1400 filling rate of 70 percent and PP + fiber material;
quantity: group 1.
A filler support:
the model number and the quantity are as follows: customizing 1 group according to the equipment;
the main technical parameters are as follows: and (5) corrosion prevention of steel.
The anoxic tank 82 is used for denitrifying the sewage by using organic pollutants in the sewage as a carbon source. The raw sewage enters the anoxic section and simultaneously enters the reflux mixed liquor of the aerobic section. Under the anoxic environment, the denitrifying bacteria utilize organic pollutant in sewage as carbon source to reduce the nitrate nitrogen in the reflux mixed liquid into nitrogen to complete the denitrification process. At the same time, BOD5 concentration decreases.
The design parameters of the anoxic tank 82 are as follows:
designing flow: 22m3/d；
The structural form is as follows: steel corrosion prevention (integrated equipment combined pool);
residence time: 3H;
the matching quantity is as follows: 1, seat;
an aeration device:
the model number and the quantity are as follows: phi 215-0.5, 4 sets in total;
the material is as follows: rubber + ABS.
The wastewater enters an aerobic section contact biological contact oxidation tank 83 after being treated by an anoxic section. Controlling the DO to be 3-4 mg/L in the aerobic section.
The bio-contact oxidation tank 83 is used for removing organic matters in the sewage by utilizing metabolism of aerobic microorganisms.
The biological contact oxidation tank 83 is provided with a secondary sedimentation tank a13 which is communicated with the integrated equipment produced water treatment system 10 and is provided with a water outlet communicated with the sludge tank 7 for sludge-water separation, and the water outlet of the aeration adjusting tank 4 is communicated with the water inlet of the anaerobic tank 81.
The biological contact oxidation pond 83 comprises an aerobic pond 831 and a membrane pond 832.
The bottom end of the aerobic tank 831 is provided with a biological contact oxidation tank aeration pipe 87.
The interior of the membrane tank 832 is filled with filler, the filler is fully distributed with a biological membrane formed by a plurality of aerobic microorganisms, and the membrane tank 832 is also internally provided with a membrane connecting assembly aeration pipe 88.
The buried integrated sewage treatment equipment 8 further comprises a fan room, and an aerobic pool fan 84 and a membrane pool fan 85 are arranged in the fan room. The aerobic pool fan 84 is communicated with the aeration pipe 87 of the biological contact oxidation pool and is used for conveying oxygen into the aerobic pool 831. The membrane tank blower 85 is communicated with the membrane receiving assembly aeration pipe 88 and is used for conveying oxygen into the membrane tank 832.
A sludge discharge mechanism 12 is arranged in the aerobic tank 831, the sludge discharge mechanism 12 is used for conveying out the sludge precipitated in the aerobic tank 831, and the sludge discharge mechanism 12 discharges the sludge into farmlands or gardens after composting.
The sludge discharge mechanism 12 comprises a sewage pump 121 arranged in the aerobic tank 831 and a septic tank 122 connected with the sewage pump 121 through a pipeline, and the discharge port end of the septic tank 122 is communicated with farmlands or gardens after composting.
The biological contact oxidation method is also called a submerged biological filter, and is characterized in that filling materials are filled in an aeration tank, oxygenated sewage is immersed in all the filling materials, and simultaneously the oxygenated sewage flows through the filling materials at a certain flow rate. After a period of time, the filler is covered with a biofilm formed by a plurality of aerobic microorganisms. The oxygenated sewage is fully contacted with the biological membrane, and organic matters in the sewage are absorbed, digested and removed under the metabolism action of various aerobic microorganisms, so that the sewage is purified. The biological contact oxidation is a biochemical treatment technology between activated sludge and a biological filter, is a biomembrane method with the characteristics of the activated sludge method, and utilizes a biomembrane fixed on a filler to adsorb and oxidize organic matters in wastewater in the biological contact oxidation tank.
The biological contact oxidation method has the characteristics that: firstly, the filler for fixing the microorganisms in the oxidation pond is completely submerged in the wastewater; secondly, an aeration method of blasting by adopting high-efficiency aeration equipment with high oxygen utilization rate is adopted in the oxidation tank, so that the oxygen quantity required by the microorganism for oxidizing the organic matters is provided, and the sewage is stirred and mixed; thirdly, the purified wastewater mainly depends on the biological film on the filler, but the wastewater in the oxidation pond still has suspended biomass with certain concentration, which plays a certain role in purifying the wastewater. Thereby having both advantages.
The biological contact oxidation process is characterized in that: the process flow is simple, the operation is convenient, the sludge expansion is not generated, and the impact load resistance is strong. Especially, the biological film on the filler contains a large amount of various microorganisms, and a stable ecosystem and a biological chain are formed, so that the treatment efficiency is high, the tank volume is reduced, and the occupied area is reduced. Especially for organic wastewater with higher concentration, when the organic wastewater is used together with a hydrolytic acidification technology in an anoxic process and a contact oxidation tank adopts multi-grid serial operation, the sufficient retention time of the sewage can be easily realized, so that an ideal treatment effect can be obtained, and the quality of effluent is ensured.
The other sludge outlet of the secondary sedimentation tank a is communicated with the anaerobic tank 81 through a pipeline. And (3) the effluent of the aerobic section enters a secondary sedimentation tank a for mud-water separation, part of sludge flows back to enter an anaerobic section, the microbial balance is maintained, and part of sludge is discharged outside.
Design parameters of the secondary sedimentation tank a:
designing flow: 22m3/d；
Residence time: 2 h;
the structural form is as follows: steel corrosion prevention (integrated equipment combined pool);
the matching quantity is as follows: 1, seat;
sludge reflux pump (sludge discharge):
the model number and the quantity are as follows: one WQ5-8-0.37 KW;
the main technical parameters are as follows: flow rate: 5m3H, lift: 8 m, power: 0.37kW, matched coupling;
the material is as follows: HT 250.
The artificial subsurface flow wetland 6 is used for carrying out physical, chemical and biological three-step cooperative treatment on the domestic sewage in the non-freezing period. The artificial subsurface flow wetland 6 is a treatment system integrating ecology, landscape and water purification, and absorbs, converts and decomposes pollutants such as BOD, COD, ammonia nitrogen, total phosphorus and the like in domestic sewage through the synergistic action of plants, substrates, microorganisms and the like. The artificial subsurface flow wetland 6 adopts a semi-underground masonry structure. The main materials include: crushed stone, zeolite, reed and cattail.
The artificial subsurface flow wetland 6 comprises a base layer, a secondary sedimentation tank b610 communicated with the water outlet of the aeration regulating tank 4, an aeration tank 611 communicated with the water outlet of the secondary sedimentation tank b610 and the subsurface flow wetland communicated with the water outlet of the aeration tank 611 are arranged above the base layer, and the water outlet of the subsurface flow wetland is communicated with a sludge tank 7.
The subsurface flow wetland comprises a first crushed stone layer 61, a second crushed stone layer 62, a third crushed stone layer 63 and a zeolite layer 64 which are sequentially distributed in a layered manner, a clay protective layer 65 is arranged above the first crushed stone layer 61, the second crushed stone layer 62, the third crushed stone layer 63 and the zeolite layer 64, a vegetable layer 612 is arranged above the clay protective layer 65, and the water outlet end of the subsurface flow wetland is used for conveying water flow through a flow channel layer 69.
The thickness of the clay protective layer 65 is 200mm, and an impermeable geomembrane is further arranged below the clay protective layer 65.
A water collecting pipe 68 is arranged at the water outlet end of the subsurface flow wetland, and a duckbill valve 67 is arranged on the water collecting pipe 68.
A medium coarse sand cushion layer 66 with the thickness of 100mm is arranged at the upstream of the flow passage layer 69, and an impermeable geomembrane is laid below the medium coarse sand cushion layer 66.
The flow channel layer 69 is obliquely arranged, the flow channel layer 69 comprises a geotextile, a coarse sand cushion layer and a gabion layer which are sequentially laid from bottom to top, the thickness of the coarse sand cushion layer in the second is 10cm, and the thickness of the gabion layer is 50 cm.
The vegetation layer 612 includes reed, cattail, etc.
The sludge outlet of the artificial subsurface flow wetland 6 and the buried integrated sewage treatment equipment 8 is connected with a sludge tank 7, and the sludge tank 7 is used for storing sludge. The secondary sedimentation tank a discharges the sludge into a sludge tank at regular time for sludge concentration and aerobic digestion, the sludge supernatant is returned and discharged into an aeration regulating tank for retreatment, and the residual sludge is pumped and transported outwards at regular intervals (two to three times per year). A fourth cover plate 71 is covered above the sludge tank 7, and the fourth cover plate 71 is a galvanized steel cover plate.
The design parameters of the sludge tank 7 are as follows:
designing flow: 22m3/d；
The structural form is as follows: steel corrosion prevention (integrated equipment combined pool), quantity: 1 seat.
The integrated equipment produced water treatment system 10 is communicated with a water outlet of the buried integrated sewage treatment equipment 8 and is used for sterilizing and disinfecting the sewage treated by the buried integrated sewage treatment equipment 8.
The integrated equipment produced water treatment system 10 comprises a first suction pump delivery pipe, a second suction pump delivery pipe, a mixing pipeline, a water outlet pipeline, a first suction pump 101, a second suction pump 102, a pressure gauge 103, an ultraviolet sterilizer 104, an electromagnetic flowmeter 105 and a sewage inspection well 106. The first suction pump conveying pipe and the second suction pump conveying pipe are arranged in parallel and are communicated with a water production pipe of the buried integrated sewage treatment equipment 8. The first suction pump 101 is provided on the first suction pump delivery pipe, and the second suction pump 102 is provided on the second suction pump delivery pipe.
The first suction pump delivery pipe and the second suction pump delivery pipe are respectively provided with two ball valves 108, a pressure gauge 103 and a check valve 107.
The junction of the first suction pump conveying pipe and the second suction pump conveying pipe is a mixing pipeline, an ultraviolet sterilizer 104 is arranged on the mixing pipeline, the water inlet end of the ultraviolet sterilizer 104 is communicated with one end of the mixing pipeline, the water outlet end of the ultraviolet sterilizer 104 is communicated with a water outlet pipeline, a connecting pipeline is further communicated and arranged between the mixing pipeline and the water outlet pipeline, and ball valves 108 are respectively arranged between the mixing pipeline and the ultraviolet sterilizer 104, between the water outlet pipeline and the ultraviolet sterilizer 104 and on the connecting pipeline.
The outlet pipe is also provided with an electromagnetic flow meter 105 for detecting the flow rate of the water flow on the outlet pipe. The end of the water outlet pipeline is connected with a sewage inspection well 106.
The water outlet of the integrated equipment water production treatment system 10 and the water outlet of the artificial subsurface wetland 6 are respectively communicated with a large pit 11, and the large pit 11 is used for collecting the water reaching the standard.
A membrane drug washing pipeline system 9 is arranged between the buried integrated sewage treatment equipment 8 and the integrated equipment produced water treatment system 10, and the membrane drug washing pipeline system 9 is used for carrying out drug washing on water flow separated from the secondary sedimentation tank a.
The membrane drug washing pipe system 9 comprises a water tank 91, a dilution pump 92, a mixing pipe 93, a drug washing tank 95 and a drug washing pump 96.
The water tank 91 is connected to a tap water pipe through a water inlet pipeline, and a ball valve is arranged on the water inlet pipeline. The water tank 91 is connected to a dilution pump 92 through a pipe, and a ball valve 108 and a check valve 107 are provided on the pipe. The water outlet of the dilution pump 92 is communicated with a mixing pipeline 93 through a pipeline.
The medicine washing box 95 is a sodium hypochlorite medicine box, and sodium hypochlorite liquid medicine is contained in the medicine washing box and is pumped into the mixing pipeline 93 through the medicine washing pump 96 to be mixed with water.
The mixing pipeline 93 is also provided with a pipeline mixer 94, so that water and sodium hypochlorite liquid medicine can be fully mixed.
A disinfection pond can be arranged between the buried integrated sewage treatment equipment 8 and the integrated equipment produced water treatment system 10, and the liquid medicine flowing out of the membrane medicine washing pipeline system 9 can be introduced into the disinfection pond. The disinfection tank is arranged for the purpose: sterilizing; the effluent after the separation of the water in the secondary sedimentation tank a automatically flows into a disinfection tank, and is discharged or recycled after being disinfected by adding medicine.
The invention is also provided with an equipment room, and the fan room and the artificial subsurface wetland 6 share the same equipment room.
The equipment room:
size: 3.1 × 3.6 × 3.5 m;
the structural form is as follows: an above-ground brick-concrete structure;
the type and the number of the fans are as follows: one rotary fan is 1.39m3Min N is 2.2 KW; the type of the rotary fan: HC-20S;
supporting facilities: fan, switch board, membrane medicine wash pipe-line system etc..
The equipment foundation adopts a reinforced concrete structure, is reasonably designed according to the corrosion degree of soil body and underground water medium to concrete and steel bars, and the strength grade of the concrete is not lower than C30; the reinforcing steel bars adopt HPB300 grade (construction reinforcing steel bars) and HRB400 grade (stressed reinforcing steel bars); the thickness of the steel bar protective layer is required to meet the corrosion prevention requirement and is not less than 35 mm. The equipment foundation should meet the requirements of the bearing capacity limit state and the normal use limit state.
The structural size of the concrete bottom plate is as follows: 5000mm × 3300mm × 500 mm.
The process of treating the rural domestic sewage is divided into a non-freezing period and a freezing period which are different.
In the non-freezing period: domestic sewage → basket type grid → primary sedimentation tank → aeration regulating tank → artificial subsurface wetland → standard discharge.
And (3) freezing period: domestic sewage → basket type grid → primary sedimentation tank → buried integrated sewage treatment equipment → discharge after reaching standards.
The specific process of the invention for treating domestic sewage in the non-freezing period is as follows.
S10, collecting the domestic sewage in rural areas through the water inlet well 1.
S20, the domestic sewage is firstly subjected to preliminary sedimentation in a preliminary sedimentation tank 3, then is subjected to filtering action of a grating 2 to remove large impurities in the wastewater, and then enters an aeration adjusting tank 4.
S30, after the domestic sewage is lifted by the lift pump of the aeration adjusting tank 4, the hair in the domestic sewage is removed by the hair collector 5; then, the domestic sewage enters a secondary sedimentation tank b610, suspended matters with high density are precipitated, and the supernatant volume, the water quality homogenization and the aerobic aeration are carried out to remove a part of organic matters. The sewage flows into the subsurface wetland, and the sewage is treated by utilizing the physical, chemical and biological synergistic effects of the substrate, the plants and the microorganisms.
And S40, the water flow discharged from the subsurface flow wetland is subjected to chlorination and disinfection and then discharged after reaching the standard.
The specific process of the invention for treating the domestic sewage in the freezing period is as follows.
S1, collecting the domestic sewage in rural areas through the water inlet well 1.
S2, the domestic sewage is firstly subjected to preliminary sedimentation in a preliminary sedimentation tank 3, then is subjected to filtering action of a grating 2 to remove large impurities in the wastewater, and then enters an aeration adjusting tank 4.
S3, after the domestic sewage is lifted by the lift pump of the aeration adjusting tank 4, the hair in the domestic sewage is removed by the hair collector 5; then, the domestic sewage enters the buried integrated sewage treatment equipment 8 for purification.
S4, domestic sewage firstly enters an anaerobic tank 81, DO in an anaerobic section is not more than 0.2mg/L, heterotrophic bacteria in the anaerobic section hydrolyze suspended pollutants and soluble organic matters in the sewage into organic acid, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, phosphorus in the sewage is released in advance by utilizing the effect of anaerobic phosphorus release and aerobic excess phosphorus absorption of phosphorus accumulating bacteria, and the phosphorus is pretreated for a subsequent phosphorus removal unit.
Then, the domestic sewage enters the anoxic tank 82 again. Under the anoxic environment, denitrifying bacteria in the anoxic tank 82 utilize organic pollutant in sewage as carbon source to reduce the nitrate nitrogen in the reflux mixed liquid into nitrogen to complete the denitrification process. At the same time, BOD5 concentration decreases.
Then, the domestic sewage enters the biological contact oxidation tank 83. Controlling the DO to be 3-4 mg/L in the aerobic section. The oxygenated sewage is fully contacted with the biological membrane, and organic matters in the sewage are absorbed, digested and removed under the metabolism action of various aerobic microorganisms, so that the sewage is purified.
S5, the treated sewage enters a secondary sedimentation tank a for mud-water separation, part of sludge flows back to enter an anaerobic tank to maintain microbial balance, and part of sludge is discharged.
S6, delivering the supernatant in the secondary sedimentation tank a to the integrated equipment water production treatment system 10 for sterilization and disinfection, wherein the ultraviolet sterilizer 104 in the integrated equipment water production treatment system 10 can play a good sterilization role.
Meanwhile, the membrane medicine washing pipeline system 9 introduces the sodium hypochlorite liquid medicine after mixing and dilution to the pipeline for further disinfection.
And S7, finally, discharging the purified domestic sewage into the large pit 11 for subsequent irrigation of farmlands.
In the sewage treatment process, the invention can generate certain sludge. The sludge has high water content, large volume, instability, easy decay and certain odor. The purpose of sludge treatment is as follows: decomposing organic matters, killing pathogenic bacteria and parasitic ova and stabilizing sludge; the water content is reduced, the sludge volume is reduced, and the transportation and the treatment are convenient; harmful substances in the sludge are reduced, resources in the sludge are utilized as much as possible, and the harm is changed into the benefit; when the denitrification and dephosphorization process is adopted, secondary pollution caused by the reextraction of phosphorus from the sludge is avoided as much as possible. And the generated sludge can be discharged by adopting a mode of periodically pumping the septic tank in the later period, and the device is used for agriculture and forestry fertilization in rural areas.
Claims (10)
1. Rural domestic sewage combined type ecological clean system, its characterized in that: comprises a water inlet well (1) which is connected with a matched sewage collecting pipe network in the rural area and is used for introducing domestic sewage, a preliminary sedimentation tank (3) which is connected with the water inlet well (1) and is used for preliminary sedimentation of the sewage, and an aeration adjusting tank (4) which is communicated with a water outlet of the preliminary sedimentation tank (3), wherein a grating (2) which is used for preliminary filtration of the sewage is obliquely arranged in the preliminary sedimentation tank (3), the water outlet of the aeration adjusting tank (4) is respectively provided with an artificial undercurrent wetland (6) which is used for physical, chemical and biological triple cooperative treatment of the domestic sewage in a non-freezing period and a buried integrated sewage treatment device (8) which is used for treating the domestic sewage in a freezing period in a parallel connection manner, the sludge outlet of the artificial undercurrent wetland (6) and the buried integrated sewage treatment device (8) is provided with a sludge tank (7), the water outlet of the buried integrated sewage treatment equipment (8) is communicated with an integrated equipment water production treatment system (10) which is used for carrying out sterilization and disinfection treatment on the sewage treated by the buried integrated sewage treatment equipment (8), and the water outlet of the integrated equipment water production treatment system (10) and the water outlet of the artificial subsurface flow wetland (6) are respectively communicated with a large pit (11) used for collecting the water reaching the standard.
2. The rural domestic sewage combined type ecological purification system of claim 1, characterized in that: bury formula integration sewage treatment device (8) including the anaerobism pond (81) that is arranged in with the suspended pollutant in the sewage and the hydrolysis of soluble organic matter for organic acid of UNICOM in proper order, be arranged in utilizing organic pollutant in the sewage as the carbon source to carry out the oxygen deficiency pond (82) of denitrogenation and be arranged in utilizing aerobic microorganism metabolism to carry out biological contact oxidation pond (83) that the organic matter got rid of in the sewage, biological contact oxidation pond (83) intercommunication is provided with delivery port and integrated equipment product water processing system (10) and is linked together, and the mud outlet is linked together with sludge impoundment (7), be used for carrying out mud-water separation's secondary sedimentation tank a (13), the delivery port of aeration equalizing basin (4) is linked together with the water inlet of anaerobism pond (81).
3. The rural domestic sewage combined type ecological purification system of claim 2, characterized in that: the biological contact oxidation tank (83) comprises an aerobic tank (831) with a biological contact oxidation tank aeration pipe (87) arranged at the bottom end and a membrane tank (832) filled with filler, a biological membrane formed by a plurality of aerobic microorganisms is fully distributed on the filler, and a membrane connecting assembly aeration pipe (88) is also arranged in the membrane tank (832).
4. The rural domestic sewage combined type ecological purification system of claim 3, characterized in that: the buried integrated sewage treatment equipment (8) further comprises a fan room, wherein an aerobic pool fan (84) communicated with the aeration pipe (87) of the biological contact oxidation pool and used for conveying oxygen into the aerobic pool (831) and a membrane pool fan (85) connected with the aeration pipe (88) of the membrane receiving assembly and used for conveying oxygen into the membrane pool (832) are arranged in the fan room.
5. The rural domestic sewage combined type ecological purification system of claim 3, characterized in that: a sludge discharge mechanism (12) for conveying out the sludge precipitated in the aerobic tank (831) is arranged in the aerobic tank (831), and the sludge discharge mechanism (12) discharges the sludge into farmlands or gardens behind the compost.
6. The rural domestic sewage combined type ecological purification system of claim 2, characterized in that: the other sludge outlet of the secondary sedimentation tank a is communicated with an anaerobic tank (81) through a pipeline.
7. The rural domestic sewage combined type ecological purification system of claim 2, characterized in that: a membrane medicine washing pipeline system (9) used for washing the medicine of the water flow separated from the secondary sedimentation tank a is arranged between the buried integrated sewage treatment equipment (8) and the integrated equipment produced water treatment system (10).
8. The rural domestic sewage combined type ecological purification system of claim 1, characterized in that: the artificial subsurface flow wetland (6) comprises a base layer, a secondary sedimentation tank b (610) communicated with the water outlet of the aeration regulating tank (4), an aeration tank (611) communicated with the water outlet of the secondary sedimentation tank b (610) and the subsurface flow wetland communicated with the water outlet of the aeration tank (611) are arranged above the base layer, and the water outlet of the subsurface flow wetland is communicated with a sludge tank (7).
9. The rural domestic sewage combined type ecological purification system of claim 8, characterized in that: the subsurface flow wetland comprises a first crushed stone layer (61), a second crushed stone layer (62), a third crushed stone layer (63) and a zeolite layer (64) which are sequentially distributed in a layered manner, a clay protective layer (65) is arranged above the first crushed stone layer (61), the second crushed stone layer (62), the third crushed stone layer (63) and the zeolite layer (64), a vegetable layer (612) is arranged above the clay protective layer (65), and a water outlet end of the subsurface flow wetland is conveyed with water flow through a flow channel layer (69).
10. The rural domestic sewage combined type ecological purification system of claim 1, characterized in that: a hair collector (5) is arranged at the water outlet of the aeration adjusting tank (4).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112694227A (en) * | 2021-02-05 | 2021-04-23 | 杭州驰丰机械有限公司 | Rural domestic sewage treatment system and control method thereof |
| CN112939341A (en) * | 2021-01-27 | 2021-06-11 | 辽宁工业大学 | Integrated domestic sewage denitrification and carbon removal equipment |
-
2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939341A (en) * | 2021-01-27 | 2021-06-11 | 辽宁工业大学 | Integrated domestic sewage denitrification and carbon removal equipment |
| CN112939341B (en) * | 2021-01-27 | 2022-09-16 | 辽宁工业大学 | Integrated domestic sewage denitrification and carbon removal equipment |
| CN112694227A (en) * | 2021-02-05 | 2021-04-23 | 杭州驰丰机械有限公司 | Rural domestic sewage treatment system and control method thereof |
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