CN110078319B - Rural distributed micro-power ecological sewage treatment device and sewage treatment system comprising same - Google Patents
Rural distributed micro-power ecological sewage treatment device and sewage treatment system comprising same Download PDFInfo
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- CN110078319B CN110078319B CN201910503755.6A CN201910503755A CN110078319B CN 110078319 B CN110078319 B CN 110078319B CN 201910503755 A CN201910503755 A CN 201910503755A CN 110078319 B CN110078319 B CN 110078319B
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The application provides a rural distributed micro-power ecological sewage treatment device and a sewage treatment system comprising the same, and relates to the technical field of sewage treatment. The rural distributed micro-power ecological sewage treatment device comprises a pre-sedimentation unit, an anaerobic reaction unit, a facultative reaction unit, an aerobic reaction unit and a sedimentation unit which are sequentially communicated; the aerobic reaction unit comprises an aerobic floating bed biological reaction tank, and an aeration device is arranged in the aerobic floating bed biological reaction tank. The rural distributed micro-power ecological sewage treatment device is formed by sequentially communicating the five unit modules, and can well remove pollutants in domestic sewage. Meanwhile, the energy consumption of the rural distributed micro-power ecological sewage treatment device obtained by the test is 0.1 multiplied by 0.125kW/m per day 3 The energy consumption of the sewage treatment device is only about 25% of that of the traditional A-O method sewage treatment method, so that the rural distributed micro-power ecological sewage treatment device also has the advantage of low energy consumption.
Description
Technical Field
The application relates to the technical field of sewage treatment, in particular to a rural distributed micro-power ecological sewage treatment device and a sewage treatment system comprising the same.
Background
The rural domestic sewage is not only a potential safety hazard of rural water source, but also aggravates the shortage of fresh water resources, so that the irrigation of cultivated land is not effectively ensured, and the living development of farmers is endangered. Untreated domestic sewage is discharged randomly, so that the living environment in rural areas is seriously polluted, and the physical health of masses is directly threatened. On one hand, untreated domestic sewage automatically flows into surface water bodies such as rivers, lakes, ponds and the like with low topography, and various water gaps are seriously polluted; on the other hand, domestic sewage is also a source of disease transmission and spread, and is easy to cause the occurrence and epidemic of infectious diseases, endemic diseases and zoonotic diseases in partial areas.
At present, the traditional A-O method treatment process is widely used in the water pollution treatment technology. The A-O method treatment process is widely adopted in urban sewage treatment plants in China and proved to be an effective water pollution control technology. The A-O method treatment process is also suitable for sewage treatment in vast rural areas in China in principle. But the energy consumption of the A-O method treatment process is up to 0.4X0.5 kW/m per day 3 Has higher energy consumption, and is not applicable to vast rural areas with relatively dispersed living in China.
Therefore, research and development of a sewage treatment system with simple equipment composition and low energy consumption is carried out on scattered domestic sewage generated by residents, institutions, schools, hospitals, commercial service institutions and various public facilities in rural areas and small towns of China so as to meet the domestic sewage treatment requirements of vast rural areas of China, and the sewage treatment system becomes necessary and urgent.
In view of this, the present application has been made.
Disclosure of Invention
The first object of the present application is to provide a rural decentralized micro-power ecological sewage treatment device which can effectively treat domestic sewage while having an advantage of low energy consumption compared with the existing conventional sewage treatment method.
The second object of the application is to provide a sewage treatment system, which can well treat domestic sewage by matching a rural scattered micro-power ecological sewage treatment device, an aeration ditch and an aquatic plant regulating pond, and is very suitable for the treatment of rural scattered sewage in China.
The application provides a rural scattered type micro-power ecological sewage treatment device, which comprises: the device comprises a pre-sedimentation unit, an anaerobic reaction unit, a facultative reaction unit, an aerobic reaction unit and a sedimentation unit which are sequentially communicated;
the aerobic reaction unit comprises an aerobic floating bed biological reaction tank, and an aeration device is arranged in the aerobic floating bed biological reaction tank.
Further, the pre-sedimentation unit comprises an anaerobic pre-sedimentation adjusting reaction tank, and soft fiber filler is filled in the anaerobic pre-sedimentation adjusting reaction tank;
preferably, a soft fiber filler frame is arranged in the anaerobic pre-sedimentation adjusting reaction tank, and the soft fiber filler is filled in the soft fiber filler frame;
preferably, the soft fiber filler is soft fiber with the fiber bundle length of 110-130 mm, and the fiber bundle interval of the soft fiber is 100-120 mm;
more preferably, the specific surface area of the soft fiber filler in the anaerobic pre-sedimentation regulating reaction tank is 1200-1250 m 2 /m 3 。
Further, the anaerobic reaction unit comprises an anaerobic sludge membrane biological reaction tank, and activated sludge is filled in the anaerobic sludge membrane biological reaction tank;
preferably, the activated sludge contains biological anaerobic bacteria;
preferably, a cage type filler frame is arranged in the anaerobic sludge membrane biological reaction tank, and the activated sludge is filled in the cage type filler frame.
Further, the facultative reaction unit comprises a facultative mud membrane biological reaction tank;
a partition plate is arranged in the facultative mud film biological reaction tank, and a combined filler is filled between the partition plate and the tank wall of the facultative mud film biological reaction tank;
preferably, the combined filler is a plastic ring sheet with the diameter of 70-80 mm;
preferably, a combined filler frame is arranged between the partition plate and the pool wall, and the combined filler is filled in the combined filler frame.
Further, a draft tube is arranged at the top of the facultative mud membrane biological reaction tank.
Further, the aeration device in the aerobic floating bed biological reaction tank comprises an aerator.
Further, the sedimentation unit comprises an inclined sedimentation tank, wherein an inclined tube support and an inclined tube are arranged in the inclined sedimentation tank, and the inclined tube is arranged on the inclined tube support.
The application provides a sewage treatment system, which comprises: the rural distributed micro-power ecological sewage treatment device, the aeration ditch and the aquatic plant regulating pond.
Further, the rural distributed micro-power ecological sewage treatment device, the aeration ditch and the aquatic plant regulating pond are sequentially communicated through pipelines.
Further, the aeration ditch comprises a water inlet distribution ditch, a first-stage natural water fall aeration section, a denitrification filler section, a second-stage natural water fall aeration section, a dephosphorization filler section and a water outlet ditch which are sequentially arranged in a gradient mode.
Compared with the prior art, the application has the beneficial effects that:
the application provides a rural scattered type micro-power ecological sewage treatment device which comprises a pre-sedimentation unit, an anaerobic reaction unit, a facultative reaction unit, an aerobic reaction unit and a sedimentation unit which are sequentially communicated; the aerobic reaction unit comprises an aerobic floating bed biological reaction tank, and an aeration device is arranged in the aerobic floating bed biological reaction tank. The rural distributed micro-power ecological sewage treatment device is formed by sequentially communicating the five unit modules, can well remove pollutants in domestic sewage and purify water quality, and particularly, the aerobic reaction unit comprises an aerobic floating bed biological reaction tank provided with an aeration device, so that the capability of removing organic pollutants (COD and BOD) is greatly improved. Meanwhile, the energy consumption of the rural distributed micro-power ecological sewage treatment device obtained by the test is 0.1 multiplied by 0.125kW/m per day 3 The energy consumption of the sewage treatment device is only about 25% of that of the traditional A-O method sewage treatment method, so that the rural distributed micro-power ecological sewage treatment device also has the advantage of low energy consumption.
According to the sewage treatment system provided by the application, the domestic sewage can be well treated by matching the rural distributed micro-power ecological sewage treatment device, the aeration ditch and the aquatic plant regulating pond, so that the sewage treatment system is very suitable for the treatment of rural distributed sewage in China.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a rural distributed micro-power ecological sewage treatment device provided in embodiment 1 of the present application;
FIG. 2 is a schematic diagram of the structure of the pre-sedimentation unit and the anaerobic reaction unit in the rural distributed micro-power ecological sewage treatment device provided by the embodiment 1 of the application;
FIG. 3 is a schematic diagram of the facultative reaction unit and the aerobic reaction unit in the rural distributed micro-power ecological sewage treatment device provided in embodiment 1 of the present application;
fig. 4 is a schematic structural diagram of a precipitation unit in the rural distributed micro-power ecological sewage treatment device provided in embodiment 1 of the present application;
FIG. 5 is a schematic plan view of a sewage treatment system according to embodiment 2 of the present application;
FIG. 6 is a schematic view of an aeration trench according to embodiment 2 of the present application;
fig. 7 is a schematic structural diagram of an aquatic higher plant ecological regulation pond provided in embodiment 2 of the present application.
Icon: 11-a pre-sedimentation unit; a 12-anaerobic reaction unit; a 13-facultative reaction unit; 14-an aerobic reaction unit; 15-a precipitation unit; 141-an aeration device; 111-total water inlet pipe; 112-liftable grille; 113-a soft fibrous filler frame; 114-anaerobic pre-sedimentation adjusting the water outlet hole of the reaction tank; 121-a cage-type packing frame; 122-a water outlet hole of the anaerobic sludge membrane biological reaction tank; 131-an intermediate separator; 132-a composite packing frame; 133-air pulling pipe; 134-facultative mud membrane biological reaction tank water outlet hole; 1411—a main air supply pipe; 142-wire mesh filler frame; 1412-gas supply branch pipes; 143-a water outlet hole of the biological reaction tank of the aerobic floating bed; 151-a tube rack; 152-inclined tube; 153-total water outlet pipe; 154-a sludge discharge pipe; 1-a rural distributed micro-power ecological sewage treatment device; 2-aeration ditch; 3-an aquatic plant regulating pond; 21-a water inlet distribution channel; 22-a first-stage natural drop aeration section; 23-denitrification filler section; 24-two-stage natural drop aeration section; 25-a dephosphorization filler section; 26-water outlet channel; 31-a water inlet of a regulating pond; 32-a vegetation blanket; 33-a pool bottom biological film structural layer; 34-submerged plants; 35-floating plants; 36-a water outlet pipe of the regulating pond.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
As shown in fig. 1, according to an aspect of the present application, a rural decentralized micro-power ecological sewage treatment apparatus 1, the rural decentralized micro-power ecological sewage treatment apparatus 1 comprising: the pre-sedimentation unit 11, the anaerobic reaction unit 12, the facultative reaction unit 13, the aerobic reaction unit 14 and the sedimentation unit 15 are communicated in sequence;
the aerobic reaction unit 14 comprises an aerobic floating bed biological reaction tank, and an aeration device 141 is arranged in the aerobic floating bed biological reaction tank.
The application provides a rural distributed micro-power ecological sewage treatment device 1 which comprises a pre-sedimentation unit 11, an anaerobic reaction unit 12, a facultative reaction unit 13, an aerobic reaction unit 14 and a sedimentation unit 15 which are sequentially communicated; the aerobic reaction unit 14 comprises an aerobic floating bed biological reaction tank, and the aerobic floating bed biological reaction tank is provided withAn aeration device 141. The rural distributed micro-power ecological sewage treatment device 1 is formed by sequentially communicating the five unit modules, can well remove pollutants in domestic sewage and purify water quality, and particularly, the aerobic reaction unit 14 comprises an aerobic floating bed biological reaction tank provided with an aeration device 141, so that the capability of removing organic pollutants (COD and BOD) is greatly improved. Meanwhile, the energy consumption of the rural distributed micro-power ecological sewage treatment device 1 obtained by experiments is 0.1 multiplied by 0.125kW/m per day 3 The energy consumption of the sewage treatment device is only about 25% of that of the traditional A-O method sewage treatment method, so that the rural distributed micro-power ecological sewage treatment device 1 also has the advantage of low energy consumption.
In a preferred embodiment of the present application, the pre-settling unit 11, the anaerobic reaction unit 12, the facultative reaction unit 13, the aerobic reaction unit 14 and the precipitation unit 15 are sequentially connected by a baffled water inlet pipe.
As a preferred implementation mode, the treatment units are communicated by adopting the baffling water inlet pipe, so that the sewage treatment time is effectively prolonged, and the treatment effect is further ensured.
In a preferred embodiment of the present application, the preliminary sedimentation unit 11 includes an anaerobic preliminary sedimentation adjustment reaction tank filled with a soft fiber filler;
preferably, a soft fiber filler frame 113 is arranged in the anaerobic pre-sedimentation adjusting reaction tank, and the soft fiber filler is filled in the soft fiber filler frame 113;
as shown in fig. 2, as a preferred embodiment, a total water inlet pipe 111 and a liftable grid 112 are arranged at the position where the upper part of the front end tank wall of the anaerobic pre-sedimentation regulating reaction tank is flush with the designed water level, and a soft fiber filler frame 113 is arranged in the anaerobic pre-sedimentation regulating reaction tank.
In a preferred embodiment of the present application, the soft fiber filler frame 113 is filled with soft fiber filler, the soft fiber filler is soft fiber with a fiber bundle length of 110-130 mm, and the fiber bundle interval of the soft fiber is 100-120 mm.
More preferably, the specific surface area of the soft fiber filler in the anaerobic pre-sedimentation regulating reaction tank is 1200-1250 m 2 /m 3 。
Referring to fig. 2, in a preferred embodiment of the present application, an anaerobic pre-sedimentation adjusting reaction tank water outlet 114 is provided at a position 50-60 mm below the water level in the upper part of the anaerobic pre-sedimentation adjusting reaction tank, and the anaerobic pre-sedimentation adjusting reaction tank water outlet 114 is communicated with the anaerobic reaction unit 12 through a baffled water inlet pipe.
In a preferred embodiment of the present application, as shown in fig. 2, the anaerobic reaction unit 12 includes an anaerobic sludge blanket bio-reaction tank filled with activated sludge;
preferably, the activated sludge contains biological anaerobic bacteria;
preferably, a cage type filler frame 121 is arranged in the anaerobic sludge membrane biological reaction tank, and the activated sludge is filled in the cage type filler frame 121.
Preferably, the cage packing frame 121 is a liftable nylon rope tightener packing frame. The diameter of the cage type filler cage is 50-60 mm, the height of the cage is 70-80 mm, the diameter of the filler is 150mm, and the theoretical specific surface area is 1900-1950 m 2 /m 3 And (5) a pool.
Preferably, the filler in the cage filler frame 121 is activated sludge containing biological anaerobic bacteria.
Referring to fig. 2, in a preferred embodiment of the present application, the anaerobic sludge membrane bioreactor tank outlet 122 is disposed at a position 100-110 mm below the design water level of the rear tank wall of the anaerobic sludge membrane bioreactor tank. The anaerobic sludge membrane biological reaction tank water outlet 122 is communicated with the facultative reaction unit 13 through a baffled water inlet pipe.
In a preferred embodiment of the present application, as shown in fig. 3, the facultative reaction unit 13 includes a facultative sludge membrane bioreactor.
An intermediate baffle 131 is arranged in the facultative mud film biological reaction tank, and a combined filler is filled between the intermediate baffle 131 and the wall of the facultative mud film biological reaction tank;
preferably, the combined filler is a plastic ring sheet with the diameter of 70-80 mm;
preferably, a combined filler frame 132 is arranged between the partition plate and the pool wall, and the combined filler is filled in the combined filler frame 132.
Preferably, the combined filler is a plastic ring sheet with the diameter of 70-80 mm. Theoretical specific surface area 2600-2650 m 2 /m 3 。
In a preferred embodiment of the present application, a draft tube 133 is disposed at the top of the facultative sludge membrane bioreactor.
In a preferred embodiment of the application, the water outlet 134 of the facultative mud membrane biological reaction tank is arranged at a position 150mm below the designed water level of the rear end tank wall of the facultative mud membrane biological reaction tank. The facultative mud membrane biological reaction tank water outlet 134 is communicated with the aerobic reaction unit 14 through a baffled water inlet pipe.
Referring to fig. 3, in a preferred embodiment of the present application, the aeration device 141 in the aerobic floating bed biological reaction tank is an aerator, and the aerator air supply main pipe 1411 is vertically arranged at the center of the aerobic floating bed biological reaction tank;
in the preferred embodiment, the aerobic floating bed biological reaction tank is provided with a steel wire mesh packing frame 142;
preferably, the steel wire mesh packing frame 142 is composed of a steel wire mesh support and a steel wire mesh, the steel wire mesh and the steel wire mesh are divided into an upper layer and a lower layer, the interval is 1000mm, and 10×10 stainless steel wire mesh coils are used for winding on an upper DN 25×4 seamless pressure supporting pipe and a lower DN 25×4 seamless pressure supporting pipe. The upper and lower steel wire meshes are provided with a BioM microorganism carrier filler with the specification of 25mm diameter, 12mm length and 500m specific surface area 2 /m 3 And (5) a pool.
The biological M microbial carrier filler has good microbial adhesion and high biological film activity, contains reinforcing components for biological enzymes, promotes the catalysis of the biological enzymes, and remarkably improves the decomposition capacity of microorganisms on organic matters (BOD, COD) in water; in addition, because the anoxic and aerobic microenvironment is repeatedly formed outside the packing ring, synchronous nitrification-denitrification reaction can be formed, and the denitrification efficiency is obviously improved. The removal efficiency of the aerobic floating bed biological reaction tank on organic matters (BOD and COD) is about 85 percent, the removal rate of nitrogen is about 82 percent, and the removal rate of phosphorus is about 75 percent. The long-term operation has no sludge expansion and sludge blockage; the microorganism on the carrier forms longer food chain, the sludge yield is less, and the yield is about 50% less than that of the traditional activated sludge.
More preferably, the bottom of the wire mesh packing frame 142 is provided with an air supply branch pipe 1412, and the air supply main pipe 1411 is communicated with the air supply branch pipe 1412.
In a preferred embodiment of the application, the rear end wall of the aerobic floating bed biological reaction tank is provided with an aerobic floating bed biological reaction tank water outlet 143 at a position with a designed water level of 200mm, and the aerobic floating bed biological reaction tank water outlet 143 is communicated with the precipitation unit 15 through a baffling water inlet pipe.
In a preferred embodiment of the application, as shown in fig. 4, the precipitation unit 15 comprises an inclined precipitation tank. The inclined sedimentation tank is internally provided with inclined tube brackets 151, the inclined tube brackets 151 are 80mm channel steel, and the interval is 200mm; the inclined tube 152 is mounted on the inclined tube bracket 151, the diameter of the inclined tube 152 is 80mm, the inclined length is 1000mm, the vertical length is 867mm, and the inclination angle is 60 degrees.
In a preferred embodiment of the application, a total water outlet pipe 153 is arranged at the position of the designed water level 250mm of the rear end tank wall of the inclined sedimentation tank for discharging treated sewage.
In a preferred embodiment of the application, the bottom of the inclined settling tank is provided with a bottom sludge discharge pipe 154.
In a preferred embodiment of the application, the tops of the anaerobic pre-sedimentation regulating reaction tank, the anaerobic sludge membrane biological reaction tank, the facultative sludge membrane biological reaction tank, the aerobic floating bed biological reaction tank and the inclined sedimentation tank are all provided with overhaul holes so as to facilitate overhaul of the rural distributed micro-power ecological sewage treatment device 1.
Preferably, the anaerobic pre-sedimentation adjusting reaction tank, the anaerobic mud film biological reaction tank, the facultative mud film biological reaction tank, the aerobic floating bed biological reaction tank and the inclined sedimentation tank are made of steel or reinforced glass fiber reinforced plastics.
The specific workflow of the rural distributed micro-power ecological sewage treatment device 1 and the functions of each reaction tank are as follows:
domestic sewage generated by village farmers enters the liftable grid through the main water inlet pipe 111, and enters the anaerobic pre-sedimentation adjusting tank after the suspended matters such as hair, plastic bags and the like are removed, wherein a soft fiber framework and soft fiber fillers are arranged in the tank. Because of the variability of the gaps of the soft fiber filler, the blocking problem is solved, and because the specific surface area of the soft fiber filler is large, the amount of the biomembrane attached to the surface of the filler is large. In an anaerobic environment, the anaerobic microbial membrane is utilized to primarily remove organic pollutants, meanwhile, certain indissolvable substances can be subjected to acidification treatment, and the characteristics of strong activity and strong adaptability of hydrolytic acidogenic bacteria are utilized to hydrolyze and acidify macromolecular structures difficult to degrade in sewage into soluble micromolecules so as to improve the physicochemical property of sewage treatment, thereby laying a foundation for the biological treatment of the next stage so as to improve the removal rate of the organic pollutants.
The anaerobic pre-sedimentation regulating tank has the functions of primarily removing organic pollutants, primarily precipitating and regulating and controlling water quality and water quantity. The effluent of the anaerobic pre-sedimentation adjusting tank enters the anaerobic sludge membrane biological reaction tank through a tank wall water outlet hole at the rear end of the anaerobic pre-sedimentation adjusting zone and a baffle water inlet pipe of the anaerobic sludge membrane biological reactor connected with the anaerobic pre-sedimentation adjusting zone. The front half area in the pond is not provided with a filler and is an anaerobic activated sludge area; the latter half of the pond is provided with a cage type filling frame 121 and a cage type filling, which is an anaerobic biomembrane area. Anaerobic activated sludge is produced by contacting floccules of microorganisms with sludge to degrade organic pollutants; the anaerobic biological membrane is contacted with sewage in the filler surface stone by utilizing microorganisms, so as to achieve the aim of removing organic pollutants. The anaerobic sludge membrane biological reaction tank utilizes two different environments to naturally mutate suspended and attached microorganisms according to the mechanism of the combined action of microorganisms in two states on organic pollutants, and the respective advantages are formed in two half areas through natural competition, so that the aim of improving the efficiency of removing the organic pollutants is fulfilled. The removal rate of the anaerobic sludge membrane biological reaction tank to the organic pollutants is about 40 percent.
The anaerobic sludge membrane biological reaction tank has the function of removing organic matters (COD and BOD) and basically converting organic nitrogen into soluble inorganic nitrogen. The effluent of the anaerobic sludge membrane biological reaction tank enters the anaerobic sludge membrane biological reaction tank through a tank wall water outlet hole at the rear end of the anaerobic sludge membrane biological reaction tank and a baffling water inlet pipe of the anaerobic sludge membrane biological reaction tank connected with the anaerobic sludge membrane biological reaction tank. An intermediate baffle plate 131 is arranged in the middle of the pool in the vertical direction, and a combined filler frame 132 and combined filler are arranged between the intermediate baffle plate 131 and the back wall of the pool. The front half area is a facultative activated sludge area, and the rear half area is a facultative biomembrane area. The facultative activated sludge and the facultative biological film which grow in a suspending way in the facultative sludge film biological reaction tank coexist, and the facultative activated sludge and the facultative biological film which grow in an attaching way coexist in two environments, exert respective advantages, jointly bear the function of removing organic pollutants, and have the advantages of high suspending growth efficiency, strong adaptive capacity of the attaching growth and good stability. The micro-oxygen required for the facultative microbial reaction is provided by the draft tube 133 without power consumption. Because the dissolved oxygen DO provided by the draft tube 133 is between 0.05x0.3mg/mL, the concentration of the dissolved oxygen DO is lower, the microorganism growth speed is slower, the specific surface area of the microorganism is increased due to the fact that the individual microorganism is smaller, the capability of absorbing organic pollutants is enhanced, the capability of metabolizing the organic pollutants is also enhanced, and therefore the capability of removing the organic pollutants (COD and BOD) is greatly improved; in addition, when the DO concentration of the dissolved oxygen is low, the short-cut nitrification-denitrification reaction can be realized at the same time, and the denitrification method has the advantage of denitrification. The removal efficiency of the anoxic mud membrane biological reaction tank on organic pollutants (BOD, COD) is about 50 percent.
The anoxic mud membrane biological reaction tank has the function of removing organic matters and nitrogen. The effluent of the facultative mud film biological reaction tank enters the aerobic floating bed biological reaction tank through a tank wall water outlet hole at the rear end of the facultative mud film biological reaction tank and a baffling water inlet pipe of the aerobic floating bed reaction tank connected with the facultative mud film biological reaction tank. The pool is provided with a steel wire mesh bracket and a steel wire mesh, and the upper and lower steel wire meshes are provided with a BioM microorganism carrier filler. The dissolved oxygen DO needed by the aerobic microorganism reaction is provided by a micro-power aerator arranged beside the pool through a micro-power aerator air supply main pipe 1411 and a non-character air supply branch pipe 1412. The dissolved oxygen DO was controlled to be about 0.5X1.0 mg/mL.
The aerobic floating bed reaction tank has the function of removing organic pollutants, nitrogen and phosphorus. The effluent of the aerobic floating bed biological reaction tank enters an inclined sedimentation zone from a tank wall water outlet hole at the rear end of the aerobic floating bed biological reaction tank and an inclined sedimentation zone baffle water inlet pipe connected with the same, and is subjected to high-efficiency precipitation separation through an inclined pipe bracket 151 and an inclined pipe 152, suspended substances SS and a small amount of organic matters COD are removed, so that sewage is purified, supernatant liquid after precipitation separation is discharged from a total water outlet pipe 153, and precipitated sludge is pumped away from a municipal sewage suction truck through an inclined sedimentation zone bottom sludge discharge pipe 154 for one year for centralized treatment. The inclined sedimentation zone has the function of removing suspended substances SS and a small amount of organic matters COD.
Example 2
As shown in fig. 5, according to an aspect of the present application, a sewage treatment system includes: the rural distributed micro-power ecological sewage treatment device 1, the aeration ditch 2 and the aquatic plant regulating pond 3.
According to the sewage treatment system provided by the application, the rural distributed micro-power ecological sewage treatment device 1, the aeration canal 2 and the aquatic plant regulating pond 3 are matched, so that organic pollutants, nitrogen, phosphorus and other substances in domestic sewage can be well removed, and meanwhile, the sewage treatment system is simple in implementation mode, better in economical efficiency and quite suitable for the treatment of rural distributed sewage in China.
In a preferred embodiment of the present application, the rural decentralized micro-power ecological sewage treatment device 1, the aeration ditch 2 and the aquatic plant regulating pond 3 are sequentially connected in a pipeline manner.
In a preferred embodiment of the present application, as shown in fig. 6, the aeration ditch 2 includes a water inlet distribution ditch 21, a first-stage natural drop aeration zone 22, a denitrification filler zone 23, a second-stage natural drop aeration zone 24, a dephosphorization filler zone 25 and a water outlet ditch 26, which are disposed in a gradient manner.
In the above preferred embodiment, the water inlet of the first-stage natural drop aeration section 22 is a thin-walled weir for water outlet at the rear end of the water inlet distribution channel 21, and the rear end of the first-stage natural drop aeration section 22 is provided with a thin-walled weir for water outlet at the rear end of the first-stage natural drop aeration section 22. The height of the water inlet distribution channel 21 is 800mm, and the height difference between the bottom stones of the water inlet distribution channel 21 and the bottom stones of the first-stage natural drop aeration section 22 is 400mm.
In the above preferred embodiment, the water inlet of the denitrification filler section 23 is a thin wall weir at the rear end of the first-stage natural drop aeration section 22, and the denitrification filler section 23 is provided with denitrification filler.
The denitrification filler is biological zeolite and has the particle size of 16 multiplied by 25mm. The rear end of the denitrification filler section 23 is provided with a thin-wall weir for water outlet at the rear end of the denitrification filler section 23. The height of the first-stage natural drop aeration section 22 is 800mm, and the height difference between the bottom stones of the first-stage natural drop aeration section 22 and the bottom stones of the denitrification filler section 23 is 400mm.
In the above preferred embodiment, the water inlet of the second-stage natural drop aeration section 24 is a thin-walled weir for water outlet at the rear end of the denitrification block filler section, and the rear end of the second-stage natural drop aeration section 24 is provided with a thin-walled weir for water outlet at the rear end of the second-stage natural drop aeration section 24. The height of the denitrification filler is 800mm, and the height difference between the 23 bottom stones of the denitrification filler section and the 24 bottom stones of the secondary natural drop aeration section is 400mm.
In the above preferred embodiment, the water inlet of the dephosphorization filler section 25 is a thin wall weir at the rear end of the secondary natural drop aeration section 24, the dephosphorization filler section 25 is provided with a dephosphorization filler, the dephosphorization filler is a porous iron-rich filler, and the particle size is 2×4mm. The rear end of the dephosphorization filling section 25 is provided with a thin-wall weir for water outlet at the rear end of the dephosphorization filling section 25. The height of the secondary natural drop aeration section 24 is 800mm, and the height difference between the bottom stones of the secondary natural drop aeration section 24 and the dephosphorization filler section 25 is 400mm.
In the above preferred embodiment, the water inlet of the water outlet 26 of the natural drop aeration ditch 2 is a thin wall weir for water outlet at the rear end of the filler section of the dephosphorization block, and the tank wall at the rear end of the natural drop aeration ditch 2 is provided with a water outlet pipe. The dephosphorization filler section 25 is flush with the foundation stone elevation of the natural water outlet aeration ditch 2 water outlet ditch 26.
In a preferred embodiment of the present application, as shown in fig. 7, the inlet of the aquatic higher plant ecological regulation pond is provided with a water inlet 31 of the regulation pond, the palygorskite is provided with a vegetation blanket 32, the pond bottom is provided with a pond bottom biomembrane construction layer 33, the material is sea sand with the thickness of 0.95 multiplied by 1.35mm, and the thickness is 200mm. Submerged plants 34 and floating plants 35 are planted in the pond. The outlet of the aquatic higher plant ecological regulating pond is provided with a regulating pond water outlet pipe 36.
As a preferred implementation mode, the water discharged from the natural drop aeration ditch 2 enters the aquatic plant regulating pond 3 through the water discharge ditch 26 of the natural drop aeration ditch 2 and a regulating pond water inlet pipe connected with the water discharge ditch, as the vegetation blanket 32 is arranged on the slope, the bottom of the pond is provided with a biological membrane structural layer 33 at the bottom of the pond, submerged plants 34, floating plants 35 and the like are planted in the pond, the ecological environment of microorganisms is created, and the organic matters, nitrogen, phosphorus and other pollutants in the sewage are further removed by utilizing the combined action of aquatic higher plants and rhizosphere microorganisms thereof. In addition, the farmland irrigation is seasonal, and is not carried out every day all the year round, so that the aquatic higher plant ecological regulating pond is arranged for regulating and storing the resource utilization treated water. The effluent of the aquatic higher plant ecological regulating pond is discharged by a water outlet pipe 36 of the regulating pond for recycling or direct discharge.
Effect example 1
In order to prove that the sewage treatment system has better treatment effect on domestic sewage, the sewage treatment system provided by the embodiment 2 is used for treating the domestic sewage with COD 578mg/L, BOD mg/L, ammonia nitrogen 40mg/L, TP 5.0.0 mg/L, SS 500mg/L, and the results are shown in the following table:
finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (7)
1. The rural scattered type micro-power ecological sewage treatment device is characterized by comprising: the device comprises a pre-sedimentation unit, an anaerobic reaction unit, a facultative reaction unit, an aerobic reaction unit and a sedimentation unit which are sequentially communicated;
the pre-sedimentation unit comprises an anaerobic pre-sedimentation adjusting reaction tank, and soft fiber filler is filled in the anaerobic pre-sedimentation adjusting reaction tank;
the aerobic reaction unit comprises an aerobic floating bed biological reaction tank, and an aeration device is arranged in the aerobic floating bed biological reaction tank;
the anaerobic reaction unit comprises an anaerobic sludge membrane biological reaction tank, and activated sludge is filled in the anaerobic sludge membrane biological reaction tank; the activated sludge contains biological anaerobic bacteria; the front half area of the anaerobic sludge membrane biological reaction tank is not provided with a filler; a cage type filler frame is arranged in the rear half area of the anaerobic sludge membrane biological reaction tank, and the activated sludge is filled in the cage type filler frame;
the facultative reaction unit comprises a facultative mud membrane biological reaction tank; the top of the facultative mud membrane biological reaction tank is provided with a draft tube.
2. The rural distributed micro-power ecological sewage treatment device according to claim 1, wherein a soft fiber filler frame is arranged in the anaerobic pre-sedimentation adjusting reaction tank, and the soft fiber filler is filled in the soft fiber filler frame;
the soft fiber filler is soft fiber with a fiber bundle length of 110-130 mm, and the fiber bundle interval of the soft fiber is 100-120 mm;
the specific surface area of the soft fiber filler in the anaerobic pre-sedimentation adjusting reaction tank is 1200-1250 m 2 /m 3 。
3. The rural distributed micro-power ecological sewage treatment device according to claim 1, wherein a partition plate is arranged in the facultative mud membrane biological reaction tank, and a combined filler is filled between the partition plate and the wall of the facultative mud membrane biological reaction tank;
the combined filler is a plastic ring sheet with the diameter of 70-80 mm;
a combined filler frame is arranged between the partition plate and the pool wall, and the combined filler is filled in the combined filler frame.
4. The rural distributed micro-power ecological sewage treatment device according to claim 1, wherein the aeration device in the aerobic floating bed biological reaction tank is an aerator.
5. The rural distributed micro-power ecological sewage treatment device according to claim 1, wherein the sedimentation unit comprises an inclined sedimentation tank, wherein an inclined tube support and an inclined tube are arranged in the inclined sedimentation tank, and the inclined tube is arranged on the inclined tube support.
6. A sewage treatment system, the sewage treatment system comprising: the rural distributed micro-power ecological sewage treatment device, the aeration ditch and the aquatic plant regulating pond according to any one of claims 1 to 5;
the rural distributed micro-power ecological sewage treatment device, the aeration ditch and the aquatic plant regulating pond are sequentially communicated through pipelines.
7. The wastewater treatment system of claim 6, wherein the aeration ditch comprises a water inlet distribution ditch, a first natural drop aeration section, a denitrification filler section, a second natural drop aeration section, a dephosphorization filler section and a water outlet ditch which are arranged in sequence in a gradient manner.
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| CN112978916A (en) * | 2019-12-16 | 2021-06-18 | 江苏孚璋生物技术有限公司 | Hydraulic circulation mode of continuous flow domestic sewage treatment equipment |
| CN111302496A (en) * | 2020-03-26 | 2020-06-19 | 长江大学 | Biological ecological coupling processing apparatus of agricultural waste water |
| 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 |
| CN114906980A (en) * | 2022-04-15 | 2022-08-16 | 九江礼涞生物科技有限公司 | Rural distributed micro-power ecological sewage treatment device and system |
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