CN114590955A - Integrated rural sewage treatment station and treatment method thereof - Google Patents
Integrated rural sewage treatment station and treatment method thereof Download PDFInfo
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- CN114590955A CN114590955A CN202210069066.0A CN202210069066A CN114590955A CN 114590955 A CN114590955 A CN 114590955A CN 202210069066 A CN202210069066 A CN 202210069066A CN 114590955 A CN114590955 A CN 114590955A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses an integrated rural sewage treatment station, which comprises: a multi-stage sewage treatment tank; it is configured with inner bag and frame, multistage sewage treatment pond includes: the solidified microbial carrier fungus column is arranged in the multi-stage sewage treatment tank and comprises a first microbial immobilization area and a second microbial immobilization area; wherein, the first microorganism immobilization region is arranged around the periphery of the second microorganism immobilization region, the first microorganism immobilization region is configured to immobilize aerobic type microorganism groups, and the second microorganism immobilization region is configured to immobilize facultative anaerobic type microorganism groups. The invention also discloses a sewage treatment method of the sewage treatment station. The integrated rural sewage treatment station treats rural sewage through the solidified microbial carrier bacterial columns, has high concentration of useful bacteria, good sewage treatment effect, no odor and odor pollution, environmental protection, automatic control of equipment, operation cost reduction and manpower waste reduction.
Description
Technical Field
The invention relates to the technical field of sewage treatment. More particularly, the invention relates to an integrated rural sewage treatment station and a treatment method thereof.
Background
At present, rural economy develops rapidly, and peasant's standard of living is very improved, but rural environmental construction and economic development are asynchronous, and among them the water environmental pollution problem is especially serious. Rural population is scattered, the population quantity is large, and no domestic sewage collection and treatment measures exist, so that rural domestic pollution sources become important factors influencing water environments. According to measurement and calculation, more than 80 hundred million tons of domestic sewage are generated in rural areas in China every year, the living environment of rural areas is seriously polluted, water bodies such as rivers and lakes in most rural areas are generally polluted, the water quality safety of drinking water is seriously threatened, the living environment of the rural areas is influenced, and the physical health of residents is threatened.
The current situation of village and town sewage treatment has the problems of low pipe network coverage rate, increased sewage discharge, lack of later maintenance and maintenance, lack of capital investment and the like, and the sewage source is as follows: the method has the advantages of wide pollution range, difficult collection in dispersion, complex sewage components, obvious regional difference, high concentration of suspended matters, organic matters and nitrogen and phosphorus, complex treatment process of the traditional activated sludge method, long culture period, large sludge yield, air pollution and inapplicability to village and town sewage treatment.
Based on this, the invention designs a module integrated sewage treatment station to solve the above mentioned problems.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide an integrated rural sewage treatment station, which decomposes pollutants in sewage by adopting a microorganism carrier bacteria column, is more reliable than the traditional sintering, can enable microorganisms to sleep in carrier particles without loss, releases the concentration of useful bacteria which is hundreds of times of that of the useful bacteria in a sludge method, has dissolved oxygen of 5-8 mu mol/L, can greatly reduce the generation of sludge and odor, is green and environment-friendly, is controlled and managed by an equipment management module, can automatically control the start and stop of equipment according to the set process parameter requirement, can improve the operation efficiency, reduce the operation cost, reduce the labor waste and enhance the reliability.
The invention also aims to provide a rural sewage treatment method, which improves the removal rate of pollutants and improves the sewage treatment effect by controlling various parameters in the primary aerobic tank.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an integrated rural sewage treatment station comprising:
a multi-stage sewage treatment tank; it is configured with inner bag and frame, multistage sewage treatment pond includes:
the solidified microorganism carrier fungus column is arranged in the multi-stage sewage treatment tank and comprises a first microorganism immobilization area and a second microorganism immobilization area;
wherein the first microorganism immobilization region is arranged around the periphery of the second microorganism immobilization region, the first microorganism immobilization region is configured to immobilize aerobic type microorganism group, and the second microorganism immobilization region is configured to immobilize facultative anaerobic type microorganism group.
Preferably, wherein the first microorganism immobilization region comprises: a first microorganism immobilization part, a second microorganism immobilization part, a third microorganism immobilization part, a fourth microorganism immobilization part, and a fifth microorganism immobilization part;
wherein the first, second, third, fourth, and fifth microorganism-immobilizing parts are configured to immobilize aerobic microorganisms of different genera;
the second microorganism immobilization region includes: a sixth microorganism-immobilizing part configured to immobilize a facultative anaerobic microorganism group of the bacterial community, and a seventh microorganism-immobilizing part configured to immobilize a facultative anaerobic microorganism group of the fungal community.
Preferably, the multistage sewage treatment tank is internally provided with an anoxic tank, an aerobic tank, a sedimentation tank, a zeolite filter tank and a water production tank from left to right in sequence;
the aerobic tank comprises a primary aerobic tank and a secondary aerobic tank, wherein a solidified microorganism carrier fungus column is fixedly arranged on one side wall of the primary aerobic tank, and the solidified microorganism carrier fungus column is fixed on a fixed support through an iron chain and is connected with an aeration pipeline.
Preferably, the method further comprises the following steps: a plurality of groups of water distribution areas; the inner wall of the multistage sewage treatment tank is arranged between the anoxic tank and the inner wall of the multistage sewage treatment tank; the anoxic tank and the primary aerobic tank are arranged between the first-stage aerobic tank and the second-stage aerobic tank; the first-stage aerobic tank and the second-stage aerobic tank are arranged between the first-stage aerobic tank and the second-stage aerobic tank; and water distribution areas are arranged between the sedimentation tank and the zeolite filter tank.
Preferably, the method further comprises the following steps:
the equipment management system is configured to automatically control the multistage sewage treatment tanks and is a distributed computer monitoring system based on a Programmable Logic Controller (PLC).
The object of the invention can be further realized by a sewage treatment method of an integrated rural sewage treatment station, which comprises the following steps:
step one, rural sewage enters an anoxic tank from a water inlet through a water distribution area to be subjected to denitrification treatment;
step two, the sewage after denitrification treatment enters a primary aerobic tank through a water distribution area and is subjected to biological contact oxidation and anaerobic fermentation decomposition treatment through a solidified microbial carrier bacterial column;
step three, the sewage after the oxidative decomposition treatment sequentially enters a secondary aerobic tank, a sedimentation tank, a zeolite filter tank and a water production tank through a water distribution area for treatment;
and step four, discharging the water with the quality meeting the discharge standard after the treatment in the step three through a water outlet.
Preferably, in the second step, a stirrer is further provided in the primary aerobic tank, and is arranged on the opposite side of the solidified microorganism carrier fungus column, and the method further comprises the steps of: adjusting the oxygen concentration of 0-1.2 m of the periphery of a solidified microbial carrier bacteria column in the first-stage aerobic tank to be 3.5-5.5 mg/L, and adjusting the stirring speed of a stirrer to be 255-285 r/min.
Preferably, in the first step, a sludge discharge hole is formed in the bottom of the anoxic tank, and sludge settled at the bottom of the tank is discharged through the sludge discharge hole after denitrification treatment.
The invention at least comprises the following beneficial effects:
1. the sewage is treated by adopting a microorganism carrier solidification technology, the sintering is more reliable than the traditional sintering, the microorganism dormancy can be prevented from losing in carrier particles, the concentration of released useful bacteria is hundreds of times of that of the useful bacteria in an activated sludge method, the dissolved oxygen can reach 5-8 mu mol/L, the generation of sludge can be greatly reduced, the odor is reduced, and the method is green and environment-friendly;
2. different floras are immobilized in different areas in the solidified microbial carrier bacterial column, so that the solidified microbial carrier bacterial column has higher microbial concentration, stronger microbial activity, high water quality purification degree and good sewage treatment effect;
3. the sewage treatment station is controlled and managed through the equipment management system, the start and stop of the equipment can be automatically controlled according to set technological parameter requirements, remote information control is achieved, the operation efficiency can be improved, the operation cost is reduced, labor waste is reduced, and the reliability is enhanced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of an integrated rural sewage treatment station of the present invention;
FIG. 2 is a schematic diagram of the internal structure of a multi-stage sewage treatment tank in the integrated rural sewage treatment station of the present invention;
FIG. 3 is a schematic structural diagram of a solidified microbial carrier bacterial column and a matched device thereof in the integrated rural sewage treatment station;
FIG. 4 is a schematic structural diagram of a solidified microbe carrier fungus column in the integrated rural sewage treatment station of the invention;
FIG. 5 is an enlarged cross-sectional view of a solidified microbial carrier bacterial column in the integrated rural sewage treatment station of the present invention;
FIG. 6 is a schematic structural diagram of a first microorganism immobilization region in the integrated rural sewage treatment station of the invention;
FIG. 7 is a schematic structural diagram of a second microorganism immobilization region in the integrated rural sewage treatment station of the invention;
FIG. 8 is a flow chart of the sewage treatment method using the integrated rural sewage treatment station of the present invention.
Reference numerals: the system comprises a multi-stage sewage treatment tank 1, an equipment management system 2, a water inlet 3, an anoxic tank 4, a water distribution area 5, a primary aerobic tank 6, a secondary aerobic tank 7, a tooth-shaped water collecting channel 8, a sedimentation tank 9, a water production tank 10, a water outlet 11, a zeolite filter tank 12, a water collecting tank 13, a solidified microorganism carrier bacteria column 14, a 55W blower 15, a nutrient microorganism supplying pipe 16, a 1.5W blower 17, a glass fiber angle steel frame 18, a buoy 19, an aeration plate 20, a plastic baffle 21, a first microorganism immobilization area 140, a second microorganism immobilization area 141, a porous carrier 142, a first microorganism immobilization part 1401, a second microorganism immobilization part 1402, a third microorganism immobilization part 1403, a fourth microorganism immobilization part 1404, a fifth microorganism immobilization part 1405, a sixth microorganism immobilization part 1411 and a seventh microorganism immobilization part 1412.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As shown in fig. 1 and 2, the present invention provides an integrated rural sewage treatment station, comprising:
the multi-stage sewage treatment tank 1 comprises an inner container and an outer frame, wherein a bottom plate of the inner container part is made of a steel plate with the thickness of 10mm, side plates and an inner partition plate are made of steel plates with the thickness of 8mm, and an L50 multiplied by 4mm angle steel support is arranged in the inner container part; the upright posts of the outer frame structure part adopt 12# channel steel, the bottom beams and the corner posts adopt 185 multiplied by 252mm section steel, and the stiffening ribs adopt 10# channel steel; the sewage treatment device is characterized in that a rigid plastic material and a heat insulation board are filled between an inner container and an outer frame, a water inlet 3 is arranged on the left side of a sewage multistage treatment tank 1, an anoxic tank 4 is arranged on the right side of the sewage multistage treatment tank 1, a first-stage aerobic tank 6 is arranged on the right side of the anoxic tank 4, a solidified microorganism carrier bacteria column 14 is arranged in the first-stage aerobic tank 6, a second-stage aerobic tank 7 is arranged on the right side of the first-stage aerobic tank 6, a sedimentation tank 9 is arranged on the right side of the second-stage aerobic tank 7, a water production tank 10 is arranged on the right side of the sedimentation tank, a zeolite filter tank 12 is arranged on the right side of the water production tank 10, a backwashing water collection tank 13 is arranged on the rear side of the zeolite filter tank 12 (for collecting and discharging sewage when zeolite is cleaned), a water outlet 11 is arranged on the right side of the sewage multistage treatment tank 1, and an equipment management system 2 is arranged beside the sewage multistage treatment tank 1;
a plurality of groups of water distribution areas 5 are arranged in the sewage multistage treatment tank 1, and the space between the inner wall of the multistage sewage treatment tank and the anoxic tank 4 is reserved; the anoxic tank 4 and the primary aerobic tank 6; the primary aerobic tank 6 and the secondary aerobic tank 7; and a water distribution area 5 is arranged between the sedimentation tank 9 and the water production tank 10 and between the sedimentation tank and the zeolite filter tank 12. A toothed (weir plate) water collecting channel 8 is arranged between the secondary aerobic tank 7 and the sedimentation tank. The equipment management module 2 is a distributed computer monitoring system based on a Programmable Logic Controller (PLC), mainly comprises a controller, a software intelligent system and a sensor, and has the functions of information acquisition, automatic control, failure, alarm and the like. The automatic control system sets operation parameters through a software program, the field instrument automatically and continuously detects each parameter in operation, simultaneously transmits signals to the PLC controller through the sensor, and the PLC outputs control signals through a series of calculations to automatically adjust the working condition of the equipment, thereby meeting the operation requirement. Meanwhile, the mobile phone cloud can be used for remote monitoring and control, conditions are created for centralized management of equipment and data, efficiency can be improved, and management cost can be saved.
As shown in FIG. 3, a schematic structural diagram of an immobilization carrier device containing immobilized microorganism carrier pillars 14 is shown, which includes: a solidified microorganism carrier bacteria column 14, a 55W blower 15, a nutrient supply microorganism pipe 16, a 1.5W blower 17, a glass fiber angle steel frame 18, a buoy 19, an aeration plate 20 and a plastic baffle plate 21.
As shown in fig. 4-7, the immobilized microbial carrier spawn 14 includes: a first microorganism immobilization region 140, a second microorganism immobilization region 141, a porous carrier 142, a solidified microorganism carrier fungus column 14 utilizes natural microorganism resources, the microbial separation, the mutagenesis, the screening and the combined research are carried out, various microbial floras which have different types, positive combination correlation effects, special functions of degrading organic pollutants in sewage, such as photosynthetic bacteria, nitrobacteria, denitrifying bacteria, lactic acid bacteria, actinomycetes, saccharomycetes and the like are gathered together, and are cultured under specific environmental conditions, the composite microbial community is solidified by using a special carrier material to form a microbial immobilized carrier product, through the combination of various biological engineering technologies such as ion adsorption, embedding, crosslinking and covalent bonding, a plurality of specially selected and matched dominant microorganisms are clustered together and fixed in a porous inert carrier of a multienzyme. After the carrier is oxygenated and contacts with water, the bacteria in different immobilized parts are activated to play the activity of the bacteria, thereby realizing the function of purifying water by microorganisms;
wherein the first microorganism-immobilizing region 140 includes: a first microorganism-immobilized portion 1401, a second microorganism-immobilized portion 1402, a third microorganism-immobilized portion 1403, a fourth microorganism-immobilized portion 1404, and a fifth microorganism-immobilized portion 1405; the first microorganism-immobilizing part 1401 is used for immobilizing Rhodospirillum rubrum photosynthetic bacteria flora (belonging to alpha-proteobacteria), rhodospiriales, rhodospirillaceae and rhodochrous, and the number thereof is G + C mol%: 63-66; used for reducing ammonia nitrogen and BOD, promoting the circulation of organic matters and purifying water quality; the second microorganism-immobilizing part 1402 is used for immobilizing Rhodopseudomonas palustris photosynthetic bacteria belonging to rhodospirillaceae and Rhodopseudomonas, and the amount thereof is G + C mol%: 61.5-71.4; the method is used for effectively decomposing organic matters in the sewage, reducing nitrite and degrading 2-chlorophenol; the third microorganism-immobilizing part 1403 for immobilizing microorganisms belonging to the genus Pseudomonas azelaica, the family Pseudomonas, the order Pseudomonas, the family Pseudomonas, the phylum Proteobacteria, the family Gamma-Proteobacteria; pseudomonas sp; used for decomposing organic matters in the water body; nitrate is reduced, and ammonia nitrogen and BOD are reduced; the fourth microorganism-immobilizing part 1404 is for immobilizing Xanthomonas maltophilia in the order Flavobiales, the family Flavobacterium; for reducing nitrate to nitrite; the fifth microorganism immobilization part 1405 is used for immobilizing candida utilis of Candidautilis; the method is used for effectively and quickly removing ammonium ions in the water body, reducing COD and eliminating environmental pollution. The second microorganism immobilization region includes 141: the sixth microorganism immobilizing part 1411 and the seventh microorganism immobilizing part 1412 are configured to immobilize facultative anaerobic microorganisms of the bacterial community, Serratia marcescens, Enterobacteriaceae and Serratia, and are used for efficiently decomposing organic matters in water, and the seventh microorganism immobilizing part 1412 is configured to immobilize facultative anaerobic microorganisms of the fungal community, Ascomycota, Saccharomyziae, Saccharomyces, Cryptococcus and Candida, and is used for adsorbing heavy metals such as chromium, copper and nickel in sewage.
Different microorganisms are immobilized in a certain area, so that the same area has a more concentrated microorganism density, and the biological activity of the microorganisms is better exerted. In the process of purifying sewage, the microbial community also flows across regions in the process of releasing the microbial community with the flow of water, but the types of the microbial communities immobilized in the same region are still concentrated due to the oxygen concentration in different regions and the aggregation of the microbial communities. A number of experiments were carried out to conclude that: the results of immobilizing the active bacteria of different genera in different regions are much better than the results of immobilizing the active bacteria of different genera in the first microorganism immobilizing region 140 and the second microorganism immobilizing region 141 of the whole immobilized microorganism carrier bacterial column 14 after mixing them, and the results are shown in tables 1 and 2, where table 1 shows the results of treating the wastewater after immobilizing the different genera according to the present invention by dividing them into different regions, table 2 shows the results of treating the same wastewater after mixing all the active aerobic genera contained in the first microorganism immobilizing region 140 of the present invention and immobilizing them in the whole first microorganism immobilizing region 140, and table 2 shows the results of treating the same wastewater after immobilizing all the facultative anaerobic bacteria contained in the second microorganism immobilizing region 141 and immobilizing them in the whole second microorganism immobilizing region 141.
TABLE 1 results of wastewater treatment by the immobilized microorganism-carrying fungus column 14 of the present invention structure
Table 2 compares the results of the wastewater treatment with the immobilized microorganism carrier of the present invention, i.e., the bacterial column 14
As can be seen from the comparison of tables 1 and 2, the immobilized microorganism carrier bacteria column of the invention has higher water purification degree and good sewage treatment effect by immobilizing different floras in different areas than by mixing all the floras and then averagely immobilizing the floras in one area.
As shown in fig. 8, a flow chart of a sewage treatment method of an integrated rural sewage treatment station comprises the following steps:
step one, rural sewage enters an anoxic tank 4 from a water inlet 3 through a water distribution area 5 to be subjected to denitrification treatment;
step two, the sewage after denitrification enters a primary aerobic tank 6 through a water distribution area 5 and is subjected to biological contact oxidation and anaerobic fermentation decomposition treatment through a solidified microorganism carrier bacteria column 14;
step three, the sewage after the oxidative decomposition treatment sequentially enters a secondary aerobic tank 7, a sedimentation tank 9, a zeolite filter tank 12 and a water production tank 10 through a water distribution area 5 for treatment;
and step four, discharging the water with the quality meeting the discharge standard after the treatment in the step three through a water outlet 11.
Sewage enters an anoxic tank 4 from a water inlet 3 through a water distribution area 5 (the anoxic tank 4 mainly plays a role of denitrifying to remove nitrate nitrogen and simultaneously removes part of BOD; a submersible mixer is arranged at the bottom of the tank wall and mainly plays a role of propelling and stirring the sewage containing suspended matters to create water flow, the stirring function is enhanced and sludge sedimentation is prevented), the sewage enters a primary aerobic tank 6 through the water distribution area 5 through a denitrifying denitrification reaction (the primary aerobic tank 6 mainly plays a role of enabling active sludge to perform aerobic respiration and further decomposing organic matters into inorganic matters to remove pollutants; the concentration of the pollutants in the tank is high; a bio-column is arranged on the inner wall of the tank, the bio-column adopts a microorganism immobilized carrier technology and can efficiently screen and culture microorganisms; biological fillers are added in the tank and can be attached to the microorganisms, the sewage is treated by utilizing a biological contact oxidation method and an anaerobic fermentation method; an aeration system is arranged at the bottom of the tank, contain aeration dish and pipeline, mainly add the sewage in with the air is forced through the air-blower, and then improve oxygen content in the sewage), through the oxidation, the decomposition passes through water distribution zone 5 and gets into second grade aerobic tank 7 and further oxidize, the decomposition effect, (7 bottom of the pool installation aeration systems of second grade aerobic tank, pool wall installation mud backwash pump, the primary action is to maintain aeration tank suspended solid concentration state, also mixed liquid flows back to the oxygen deficiency pond, the special equipment of denitrification deammoniation) through the profile of tooth weir plate (can guarantee that liquid evenly overflows, block the great dross in surface), water collecting channel 8 gets into sedimentation tank 9 (9 mud sediment suspension layer top installation inclination 60 degrees cellular pipe filler of pipe, water rises along the pipe chute and flows, make aquatic suspended impurity, the solid slides down to the bottom of the pool along the pipe under the action of gravity, discharge in concentrating. The pipeline of the dosing device is connected in an internal connection way, and the flocculating agent is added to separate water and impurities quickly and thoroughly), and the water enters the zeolite filter tank 12 (the long-handle filter head is paved at the bottom of the tank to ensure uniform water distribution through the serrated weir plate, the water collecting channel 8 and the water distribution area 5. The supporting layer and the zeolite filter material are arranged above the sewage treatment device, and the zeolite has a large surface area, strong adsorption capacity and ion exchange capacity, and can remove pollutants such as organic matters, heavy metals and the like in the sewage. And a 300mm deep water collecting tank 13 is arranged above the water collecting tank, a hole is formed in the middle side wall of the water collecting tank, sewage at a backwashing section is discharged to an adjusting tank, the sewage enters the water producing tank 10 through an overflow weir (a backwashing water pump is arranged on the inner wall of the bottom of the tank, a pipeline is connected to a long-handle filter head, and impurities on the surface and inside of the filtering material are cleaned by using clean water, so that the porosity and the water yield of a filtering material layer are ensured), the water in the tank is discharged through a water outlet 11, and the quality of the discharged water reaches the first-grade A standard GB18918-2002 of pollutant discharge Standard of urban Sewage treatment plant.
The anoxic tank 4, the primary aerobic tank 6, the secondary aerobic tank 7 and the sedimentation tank 9 are respectively provided with sludge discharge holes at the bottom, and can regularly discharge settled sludge at the bottom.
Wherein, in step two, still be provided with the agitator in the first grade aerobic tank, it sets up in solidification microorganism carrier fungus post relative one side, still includes the step: adjusting the oxygen concentration of 0-1.2 m of the periphery of a solidified microbial carrier bacteria column in the first-stage aerobic tank to be 3.5-5.5 mg/L, and adjusting the stirring speed of a stirrer to be 255-285 r/min.
The results of the tests conducted by the above-mentioned sewage treatment method are shown in Table 3
TABLE 3 test results of the treatment by the sewage treatment method of the integrated sewage treatment station of the present invention
Wherein, still be provided with the agitator in the good oxygen pond of one-level, it sets up in the relative one side of solidification microbial carrier fungus post, still includes the step: adjusting the oxygen concentration of 0-1.2 m of the periphery of the solidified microbial carrier bacteria column in the first-stage aerobic tank to be 3.5-5.5 mg/L, and adjusting the stirring speed of the stirrer to be 255-285 r/min. According to a large number of experiments, in order to maximize the activity of facultative anaerobes in the second microorganism immobilization region and simultaneously ensure that the activity of aerobic bacteria in each microorganism immobilization part in the first microorganism immobilization region is also maximized, the oxygen concentration in 0-1.2 m of the periphery of a solidified microorganism carrier bacteria column is adjusted to be 3.5-5.5 mg/L, so that the activity of aerobic bacteria in the first microorganism immobilization region and the activity of facultative anaerobes in the second microorganism immobilization region are maximized, and the optimal sewage purification effect is achieved. The method is characterized in that the first-stage aerobic tank is subjected to numerical simulation under different rotating speeds of the stirrer, the speed distribution rule of fluid on each section in the first-stage aerobic tank is analyzed and compared, the power and the axial effective propelling distance of the stirrer are considered, the effective stirring radius of the water body section is considered, and a large amount of data collection simulation results show that the optimal stirring effect and the good energy-saving effect can be achieved when the stirring speed of the stirrer in the first-stage aerobic tank is 255-285 r/min.
Compared with the traditional activated sludge method and MBR membrane method, the sewage treatment method of the integrated rural sewage treatment station has the advantages shown in Table 4
TABLE 4 comparison of the Sewage treatment method of the present invention with the conventional sewage treatment method
The invention discloses an integrated rural sewage treatment station, which is an integrated device specially developed aiming at the characteristics of rural and village domestic sewage, and mainly comprises three independent modules: the movable water tank module, the microorganism equipment module and the management operation room module integrate treatment processes of oxygen deficiency, aerobic treatment, backflow treatment, a portable microorganism release device and the like. The multi-stage sewage treatment tank body of the integrated rural sewage treatment station adopts the separation design of the liner and the heat insulation structure, and the thickness and the material of the heat insulation unit can be flexibly selected and installed according to the local temperature condition in winter. The post-maintenance operation is simple, the sewage treatment effect is good, no odor and odor pollution is generated on the site, the modularization installation is simple and rapid, the remote informatization control can be realized, the labor amount is greatly reduced, the effluent index reaches the first-grade A standard GB18918-2002 of pollutant discharge Standard for urban sewage treatment plants, and the rural water quality environment is greatly improved. The integrated rural sewage treatment station has high automation degree, is simple to operate and does not need to be attended by a special person; the sewage treatment station has the advantages of modular design, small occupied area, convenience in installation and convenience in carrying and site moving, and the sewage treatment station can normally operate in winter without buried installation by adopting the inner container heat insulation design; the method has the advantages of low operation cost, saving civil construction, effectively reducing lifting amount by utilizing the height difference of the water level, realizing gravity type sewage discharge more efficiently, generating no secondary pollution, being green and environment-friendly, saving cost and having simple process.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. Rural sewage treatment station of integration, its characterized in that includes:
a multi-stage sewage treatment tank; it is configured with inner bag and frame, multistage sewage treatment pond includes:
the solidified microorganism carrier fungus column is arranged in the multi-stage sewage treatment tank and comprises a first microorganism immobilization area and a second microorganism immobilization area;
wherein the first microorganism immobilization region is arranged around the periphery of the second microorganism immobilization region, the first microorganism immobilization region is configured to immobilize aerobic type microorganism group, and the second microorganism immobilization region is configured to immobilize facultative anaerobic type microorganism group.
2. The integrated rural sewage treatment station of claim 1, wherein the first microorganism immobilization zone comprises: a first microorganism immobilization part, a second microorganism immobilization part, a third microorganism immobilization part, a fourth microorganism immobilization part, and a fifth microorganism immobilization part;
wherein the first, second, third, fourth, and fifth microorganism-immobilizing parts are configured to immobilize aerobic microorganisms of different genera;
the second microorganism immobilization region includes: a sixth microorganism-immobilizing part configured to immobilize a facultative anaerobic microorganism group of the bacterial community, and a seventh microorganism-immobilizing part configured to immobilize a facultative anaerobic microorganism group of the fungal community.
3. The integrated rural sewage treatment station according to claim 1, wherein the multistage sewage treatment tank is internally provided with an anoxic tank, an aerobic tank, a sedimentation tank, a zeolite filter tank and a water production tank from left to right;
the aerobic tank comprises a primary aerobic tank and a secondary aerobic tank, wherein a solidified microorganism carrier fungus column is fixedly arranged on one side wall of the primary aerobic tank, and the solidified microorganism carrier fungus column is fixed on a fixed support through an iron chain and is connected with an aeration pipeline.
4. The integrated rural sewage treatment station of claim 3, further comprising: a plurality of groups of water distribution areas; the inner wall of the multistage sewage treatment tank is arranged between the anoxic tank and the inner wall of the multistage sewage treatment tank; the anoxic tank and the primary aerobic tank are arranged between the first-stage aerobic tank and the second-stage aerobic tank; the first-stage aerobic tank and the second-stage aerobic tank are arranged between the first-stage aerobic tank and the second-stage aerobic tank; and water distribution areas are arranged between the sedimentation tank and the zeolite filter tank.
5. The integrated rural sewage treatment station of claim 1, further comprising:
the equipment management system is configured to automatically control the multistage sewage treatment tanks and is a distributed computer monitoring system based on a Programmable Logic Controller (PLC).
6. A sewage treatment method adopting the integrated rural sewage treatment station as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
step one, rural sewage enters an anoxic tank from a water inlet through a water distribution area to be subjected to denitrification treatment;
step two, the sewage after denitrification treatment enters a primary aerobic tank through a water distribution area and is subjected to biological contact oxidation and anaerobic fermentation decomposition treatment through a solidified microbial carrier bacterial column;
step three, the sewage after the oxidative decomposition treatment sequentially enters a secondary aerobic tank, a sedimentation tank, a zeolite filter tank and a water production tank through a water distribution area for treatment;
and step four, discharging the water with the quality meeting the discharge standard after the treatment in the step three through a water outlet.
7. The wastewater treatment method according to claim 6, wherein in the second step, the primary aerobic tank is further provided with a stirrer which is arranged at the opposite side of the solidified microorganism carrier fungus column, and the method further comprises the following steps: adjusting the oxygen concentration of 0-1.2 m of the periphery of a solidified microbial carrier bacteria column in the first-stage aerobic tank to be 3.5-5.5 mg/L, and adjusting the stirring speed of a stirrer to be 255-285 r/min.
8. The wastewater treatment method according to claim 6, wherein in the first step, a sludge discharge hole is formed at the bottom of the anoxic tank, and sludge settled at the bottom of the tank is discharged through the sludge discharge hole after the denitrification treatment is finished.
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