CN211255623U - Distributed rural domestic sewage treatment system - Google Patents
Distributed rural domestic sewage treatment system Download PDFInfo
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- CN211255623U CN211255623U CN201921908980.XU CN201921908980U CN211255623U CN 211255623 U CN211255623 U CN 211255623U CN 201921908980 U CN201921908980 U CN 201921908980U CN 211255623 U CN211255623 U CN 211255623U
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Abstract
The utility model provides a rural domestic sewage's of distributed processing system, including the equalizing basin, the elevator pump, good oxygen pond, functional artificial wetland, chemical dephosphorization filtering bed and sludge drying pond, sewage entry and anoxic zone are established to the equalizing basin, anoxic zone one end and good oxygen pond one end intercommunication, the anoxic zone other end passes through back flow and good oxygen pond other end intercommunication, good oxygen pond is provided with the fan, sludge discharge pipe and sludge drying pond intercommunication are passed through to its bottom, good oxygen pond top is passed through the overflow pipe and is connected with functional artificial wetland, the outlet end of functional artificial wetland and the end of intaking of chemical dephosphorization filtering bed are connected. The utility model discloses a AO denitrification process can effectively desorption total nitrogen, goes out the water and gets into functional artificial wetland and adsorb degradation nitrogen phosphorus and COD to utilize functional artificial wetland and the multistage process guarantee of chemical phosphorus removal filter bed to go out the water and stably reach one-level A mark, be an effectual rural domestic sewage treatment means, market prospect is wide.
Description
Technical Field
The utility model relates to a sewage treatment technical field, more specifically relates to a distributed rural domestic sewage's processing system.
Background
According to the relevant research and investigation results, the discharge amount of the agricultural pollutant Chemical Oxygen Demand (COD) accounts for 43.7% of the total discharge amount, and the agricultural Total Nitrogen (TN) and Total Phosphorus (TP) respectively account for 57.2% and 67.4% of the total discharge amount. With the improvement of the treatment rate of urban sewage and industrial wastewater, sewage discharged in rural life and production becomes an important pollution source of water body pollution in China.
The domestic and foreign rural domestic sewage treatment technology is divided into anaerobic biotechnology, aerobic biotechnology, ecological treatment technology and the like according to the principle, and the specific technical process comprises a septic tank, a methane tank, a contact oxidation tank, an ecological filter tank, a stabilization tank, an artificial wetland, land infiltration and the like. The existing rural domestic sewage treatment technology in China mainly aims at removing organic pollutants, and has low removal rate or unstable removal effect on nitrogen and phosphorus nutrient elements which are the main reasons for water eutrophication. At present, the development of sewage treatment process or equipment with high removal rate of organic matters, nitrogen and phosphorus is an important direction for the development of rural sewage treatment in the present day.
Developed countries begin early in the aspect of rural sewage control, accumulate some experiences, and the process has strong removal capability on organic pollutants and nitrogen and phosphorus nutrient salts, so that the process is worth being used for reference in China. The technology of the Japanese purification tank (Jookasou) is an integrated treatment facility technology applied to the aspect of rural dispersed sewage treatment, originates from the 60 th century in 20 th century, forms a set of relatively complete technical management system after years of development, and plays an important role in protecting the water environment in the rural areas in Japan.
By taking the experiences of the Japanese purification tank technology in the aspect of rural sewage treatment as a reference, the application prospect of the purification tank technology in the rural sewage treatment in China is explored, and the method has important significance for promoting the rural sewage treatment and improving the rural water environment. However, at present, the municipal domestic sewage discharge standard in most areas adopts the first-class A standard in the pollutant discharge standard of urban sewage treatment plants, the discharge standard is difficult to reach by adopting a standard type small purifying tank, and the defects of high investment, high operation cost, high operation and maintenance difficulty and the like exist by adopting a performance-identified purifying tank.
The traditional domestic phosphorus removal process is mainly realized by adding medicines, needs the flows of liquid medicine preparation, metering and adding, linkage control and the like, has large daily operation and maintenance amount and high energy consumption, and the traditional denitrification process needs a large amount of nitrified liquid to flow back, has large power consumption, and cannot ensure the standard reaching rate of 100 percent of total nitrogen only by a single nitrification and denitrification treatment process.
Aiming at the small treatment capacity and dispersibility of rural domestic sewage, the method is very important to find an integrated treatment facility which has the advantages of high-efficiency nitrogen and phosphorus removal, no daily maintenance and low energy consumption.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a treatment system of distributed rural domestic sewage.
The utility model adopts the following technical scheme:
a treatment system of distributed rural domestic sewage comprises a regulating tank, a lift pump, an aerobic tank, a functional artificial wetland, a chemical phosphorus removal filter bed and a sludge drying tank;
the equalizing basin is provided with sewage entry and anoxic zone, the one end intercommunication of elevator pump and good oxygen pond is passed through to the one end in equalizing basin anoxic zone, the other end in equalizing basin anoxic zone pass through the back flow with good oxygen pond's other end intercommunication, good oxygen pond is provided with the fan through the pipe connection of exploding, good oxygen bottom of the pool portion through the mud pipe with sludge drying pond intercommunication, good oxygen top of the pool portion pass through the overflow pipe with functional artificial wetland is connected, functional artificial wetland's play water end with chemical dephosphorization filter bed's the end of intaking is connected, be provided with the iron and carbon filler in the chemical dephosphorization filter bed.
In the technical scheme, the treatment system is of a two-layer stacked structure formed by respectively arranging an above-ground layer and an underground layer in the vertical direction, wherein the aerobic tank and the functional artificial wetland are respectively arranged above the regulating tank and the chemical phosphorus removal filter bed, and the sludge drying tank is arranged in the underground layer.
Specifically, the depth of the regulating tank and the depth of the aerobic tank are 1.2-1.6 m.
Further, in the technical scheme, the functional artificial wetland is filled with a combined filler, the combined filler comprises gravel, iron-carbon coupled filler, crushed stone and soil, and the filling height of the combined filler is 750-880 mm.
Preferably, in the technical scheme, emergent aquatic plants are planted in the functional artificial wetland.
In the technical scheme, the iron-carbon filler (8) is prepared by mixing the following components in percentage by mass of 3: 1-1: 4, the iron powder and the carbon powder are carbonized and sintered and then mixed and granulated.
Further, in the above technical solution, the iron carbon filler (8) is an oval particle with a porous structure, the particle size is 30-50mm, and the filling height of the iron carbon filler (8) is 500-600 mm.
Specifically, the method for treating the distributed rural domestic sewage by adopting the treatment system comprises the following steps:
step 1: rural domestic sewage to be treated flows into the equalizing basin by self, the equalizing basin in still set up anoxic zone (A section), sewage gets into good oxygen pond after the elevator pump promotes, supplies oxygen to the water through the fan, good oxygen pond mixed liquid flow back to the anoxic zone (A section) of equalizing basin, under the condition of oxygen deficiency-good oxygen is alternative, carry out the getting rid of total nitrogen in the sewage through nitrifying denitrification.
Step 2: sludge precipitated at the bottom of the aerobic tank is periodically discharged into a sludge drying tank through a sludge discharge pipe, supernatant liquid of the sludge after standing and precipitation flows back to the regulating tank, and the sludge precipitated at the bottom is naturally dried through evaporation; clear water overflowing from the top of the aerobic tank automatically flows into the functional artificial wetland.
And step 3: emergent aquatic plants are planted in the functional artificial wetland, a combined filler which takes gravels, iron-carbon coupled fillers, broken stones and soil as main components is filled in the functional artificial wetland, the purification treatment of sewage is cooperatively completed by utilizing the adsorption and degradation effects of developed root systems of aquatic plants and the complex physical, chemical and biological effects of substrates, plants and microorganisms, a part of nitrogen, phosphorus and COD are removed, and the discharged water is discharged into a chemical phosphorus removal filter bed.
And 4, step 4: the chemical phosphorus removal filter bed is internally provided with iron-carbon particle fillers, elemental iron loses electrons by using iron-carbon reaction to generate iron ions, the iron ions and sewage undergo flocculation reaction to generate phosphorus-containing precipitates, and the precipitates are adsorbed on the surfaces of the iron-carbon particle fillers, so that the total phosphorus content in the water is reduced, and the effluent of the chemical phosphorus removal filter bed can reach the first-class A standard (GB18918-2002) of pollutant discharge Standard of urban Sewage treatment plants.
The utility model has the following characteristics and beneficial effect:
(1) the utility model adopts AO denitrification process can effectively remove total nitrogen, and the effluent enters into functional artificial wetland, and utilizes the developed root system of aquatic plant to adsorb and degrade the pollutants such as nitrogen, phosphorus, COD, and finally utilizes the chemical dephosphorization filter bed to carry out deep dephosphorization, and the multi-stage process guarantee can make the 100% of effluent stably reach the first grade A standard;
(2) the utility model organically combines the AO denitrification process, the functional artificial wetland, the chemical dephosphorization filter bed and other process technologies with high-efficiency denitrification and dephosphorization, each treatment tank body forms a special stacked structure in space, effectively utilizes the liquid level difference, can complete the operation of the whole system only by one-time lifting, and saves energy consumption;
(3) the utility model has the advantages of the investment is low, take effect soon, daily non-maintaining, the working costs is low, and this technique not only can stably reach one-level A standard, through the optimization and the promotion of technique, some indexes still can satisfy IV class standard among the earth's surface water environment quality standard. The process is an effective rural domestic sewage treatment means and has wide market prospect.
Drawings
FIG. 1: the system structure chart of the embodiment of the utility model;
FIG. 2: the utility model discloses method flow chart of embodiment.
In the figure, 1, a regulating reservoir, 2, a lift pump, 3, an aerobic reservoir, 4, a functional artificial wetland, 5, a chemical dephosphorization filter bed, 6, a sludge drying reservoir, 7, a fan, 8, iron-carbon particle filler, 9, combined filler and 10, emergent aquatic plants are arranged.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings and specific examples; and the following examples are illustrative of the present invention and are not intended to limit the scope of the present invention.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are commercially available.
Please refer to fig. 1, the utility model provides a system for decentralized rural domestic sewage treatment, which comprises an adjusting tank 1, a lift pump 2, an aerobic tank 3, a functional artificial wetland 4, a chemical phosphorus removal filter bed 5 and a sludge drying tank 6.
Rural domestic sewage to be treated automatically flows into a regulating tank 1, an anoxic zone (section A) is also arranged in the regulating tank 1, the sewage enters an aerobic tank 3 after being lifted by a lifting pump 2, oxygen is supplied to a water body by a fan 7, a mixed solution in the aerobic tank 3 flows back to the anoxic zone (section A) of the regulating tank 1, total nitrogen in the incoming water is removed through the biochemical action of oxygen deficiency and aerobic alternation, sludge precipitated at the bottom of the aerobic tank 3 is periodically discharged into a sludge drying tank 6 through a sludge discharge pipe, supernatant after the sludge is statically precipitated flows back to the regulating tank 1, and the sludge deposited at the bottom is naturally dried; clear water overflowing from the top of the aerobic tank 3 automatically flows into the functional artificial wetland 4, partial nitrogen, phosphorus and COD are removed by utilizing the adsorption and degradation effects of developed roots of aquatic plants, the hydraulic retention time of the functional artificial wetland 4 is controlled to be about 48 hours, and the porosity is set according to 30%; discharging the effluent into a chemical phosphorus removal filter bed 5, internally arranging an iron-carbon particle filler 8, using iron-carbon reaction to make elemental iron lose electrons to generate iron ions, carrying out flocculation reaction with sewage to generate phosphorus-containing precipitate, and adsorbing the precipitate on the surface of the iron-carbon particle filler 8, thereby effectively reducing the total phosphorus content in the water, wherein the iron-carbon particle filler 8 needs to be replaced after being adsorbed and saturated, and the replacement frequency is 1-2 years and 1 time; the effluent of the chemical phosphorus removal filter bed 5 can reach the first class A standard (GB18918-2002) of pollutant discharge standard of urban sewage treatment plants.
The sewage treatment scale of the utility model is set to be below 50 tons/day and is only suitable for the treatment of small-sized rural domestic sewage. The whole process scale forms a standardized assembly, and the integrated equipment is formed through reasonable assembly. In the season suitable for plant growth in spring and summer, after the effluent of the aerobic tank 3 is treated by the functional artificial wetland 4, if the total phosphorus content can reach the standard, the effluent is directly discharged out beyond the chemical phosphorus removal filter bed 5; during non-plant growth seasons in autumn and winter, the effluent of the functional artificial wetland 4 needs to be discharged after deep dephosphorization through the chemical dephosphorization filter bed 5.
The system of the embodiment adopts a special stacked structure, the treatment facility is divided into two layers along the vertical direction, wherein one layer is arranged above the ground, the other layer is arranged below the ground, and the height of the single-layer tank body is 1.5 m; the adjusting tank 1, the chemical phosphorus removal filter bed 5 and the sludge drying tank 6 are arranged in the underground layer; the functional artificial wetland 4 and the aerobic tank 3 are arranged on the upper layer of the ground.
The functional artificial wetland 4 of the embodiment is also internally provided with a combined filler 9, the combined filler 9 mainly comprises gravel, iron-carbon coupled filler, broken stone and soil, and the total filling height of the combined filler 9 is 800 mm. Wherein the iron-carbon coupling filler in the combined filler 9 is a filler with denitrification function.
Emergent aquatic plants 10 are planted in the functional artificial wetland 4 of the embodiment.
The chemical phosphorus removal filter bed 5 of the present embodiment is filled with an iron carbon particle filler 8, and the iron carbon particle filler 8 is prepared by carbonizing, sintering, mixing and granulating iron powder and carbon powder.
The iron carbon particle filler 8 of the embodiment is an oval particle and has a porous structure, the diameter range is 30-50mm, and the filling height of the iron carbon particle filler 8 is 500-600 mm.
The system of the embodiment can realize PLC full-automatic control.
The utility model discloses the organic has combined AO denitrogenation technology, functional artificial wetland, chemical phosphorus removal filter bed etc. to have the process technology of high-efficient nitrogen and phosphorus removal, and each processing cell body forms special stacked structure in the space, has saved the energy consumption greatly, and operation maintenance and simple, its technical principle as follows:
firstly, an anoxic zone (section A) is arranged in a regulating tank, sewage enters an aerobic tank after being lifted for one time, ammonia nitrogen is oxidized into nitrate nitrogen through aeration of a fan, nitrified liquid automatically flows back into the anoxic zone by utilizing liquid level difference, denitrification is realized through anoxic-aerobic alternate action, and most of total nitrogen in the water can be removed through the process; sludge deposited at the bottom of the aerobic tank is periodically discharged into a sludge drying tank through a sludge discharge pipe, supernatant liquid of the sludge after standing and depositing flows back to a regulating tank, and the sludge deposited at the bottom is naturally dried through evaporation; clear water overflowing from the aerobic tank enters a functional artificial wetland, on one hand, partial nitrogen, phosphorus and COD are removed by utilizing the adsorption and degradation effects of developed root systems of emergent aquatic plants, and on the other hand, a combined filler taking gravels, an iron-carbon coupled filler, broken stones and soil as main components is filled in the wetland, wherein the iron-carbon coupled filler has a certain denitrification function, and can further reduce total nitrogen by acting with the combined filler when sewage flows through the wetland; the effluent of the wetland automatically flows into a chemical dephosphorization filter bed, iron-carbon particle fillers prepared by carbonizing, sintering and mixing and granulating iron powder and carbon powder are filled in the filter bed, the iron-carbon reaction is utilized to ensure that elemental iron loses electrons to generate iron ions, the iron ions and the sewage undergo a flocculation reaction to generate phosphorus-containing precipitates, and the precipitates are adsorbed on the surface of the iron-carbon particle fillers, so that the total phosphorus content in the water is effectively reduced, and the effluent of the chemical dephosphorization filter bed can reach the first-class A standard of pollutant discharge Standard of urban Sewage treatment plants (GB 18918-2002).
Referring to fig. 2, the utility model provides a method for decentralized rural domestic sewage treatment, including the following steps:
step 1: rural domestic sewage to be treated automatically flows into the regulating tank 1, an anoxic zone (section A) is further arranged in the regulating tank 1, the sewage enters the aerobic tank 3 after being lifted by the lifting pump 2, oxygen is supplied to a water body through the fan 7, mixed liquid in the aerobic tank 3 flows back to the anoxic zone (section A) of the regulating tank 1, and total nitrogen in the sewage is removed through nitrification and denitrification under the condition of oxygen deficiency-aerobic alternation.
Step 2: sludge precipitated at the bottom of the aerobic tank 3 is periodically discharged into a sludge drying tank 6 through a sludge discharge pipe, supernatant liquid of the sludge after standing and precipitation flows back to the regulating tank 1, and the sludge precipitated at the bottom is naturally dried through evaporation; clear water overflowing from the top of the aerobic tank 3 automatically flows into the functional artificial wetland 4.
And step 3: emergent aquatic plants 10 are planted in the functional artificial wetland 4, a combined filler 9 which takes gravels, iron-carbon coupled fillers, gravels and soil as main components is filled in the functional artificial wetland, the purification treatment of the sewage is cooperatively completed by utilizing the adsorption and degradation effects of developed root systems of aquatic plants and the complex physical, chemical and biological effects of substrates, plants and microorganisms, a part of nitrogen, phosphorus and COD are removed, wherein the hydraulic retention time is controlled to be about 48 hours, the porosity is set according to 30%, and the discharged water is discharged into the chemical phosphorus removal filter bed 5. Wherein, in the seasons suitable for plant growth in spring and summer, if the total phosphorus content of the effluent of the functional artificial wetland 4 can reach the standard, the effluent exceeds the chemical phosphorus removal filter bed 5 and is directly discharged; during non-plant growth seasons in autumn and winter, the effluent of the functional artificial wetland 4 needs to be discharged after deep dephosphorization through the chemical dephosphorization filter bed 5.
And 4, step 4: the chemical phosphorus removal filter bed 5 is internally provided with iron-carbon particle fillers 8, elemental iron loses electrons by using iron-carbon reaction to generate iron ions, the iron ions and sewage undergo flocculation reaction to generate phosphorus-containing precipitates, the precipitates are adsorbed on the surfaces of the iron-carbon particle fillers 8, so that the total phosphorus content in the water is reduced, the iron-carbon particle fillers 8 need to be replaced after being adsorbed and saturated, the replacement frequency is 1-2 years and 1 time, and the effluent of the chemical phosphorus removal filter bed 5 can reach the first-class A standard (GB18918-2002) of pollutant discharge Standard of urban Sewage treatment plants.
It should be understood that parts of the specification not set forth in detail are well within the prior art.
It should be understood that the above description of the preferred embodiments is given in some detail, and not as a limitation to the scope of the invention, and that various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the invention as defined by the appended claims.
Finally, the system of the present invention is merely a preferred embodiment, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A treatment system of distributed rural domestic sewage is characterized by comprising a regulating tank (1), a lift pump (2), an aerobic tank (3), a functional artificial wetland (4), a chemical phosphorus removal filter bed (5) and a sludge drying tank (6);
equalizing basin (1) is provided with sewage entry and anoxic zone, the one end in equalizing basin (1) anoxic zone is passed through elevator pump (2) and the one end intercommunication of good oxygen pond (3), the other end in equalizing basin (1) anoxic zone pass through the back flow with the other end intercommunication of good oxygen pond (3), good oxygen pond (3) are provided with fan (7) through the pipe explosion connection, good oxygen pond (3) bottom through the mud pipe with sludge drying pond (6) intercommunication, good oxygen pond (3) top pass through the overflow pipe with functional artificial wetland (4) are connected, the play water end of functional artificial wetland (4) with the end connection of intaking of chemical dephosphorization filter bed (5), be provided with iron carbon filler (8) in chemical dephosphorization filter bed (5).
2. The treatment system according to claim 1, characterized in that the treatment system is a two-layer stacked structure formed by respectively arranging an overground layer and a underground layer in the vertical direction, wherein the aerobic tank (3) and the functional artificial wetland (4) are respectively arranged above the adjusting tank (1) and the chemical phosphorus removal filter bed (5), the sludge drying tank (6) is arranged in the underground layer, and the depth of the adjusting tank (1) and the depth of the aerobic tank (3) are 1.2-1.6 m.
3. The treatment system according to claim 1 or 2, wherein the functional artificial wetland (4) is filled with the combined filler (9), and the filling height of the combined filler (9) is 750-880 mm.
4. The treatment system according to claim 3, characterized in that emergent aquatic plants (10) are planted in the functional artificial wetland (4).
5. The treatment system according to claim 1, wherein the iron carbon filler (8) is oval particles with a porous structure, the particle size is 30-50mm, and the filling height of the iron carbon filler (8) is 500-600 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921908980.XU CN211255623U (en) | 2019-11-07 | 2019-11-07 | Distributed rural domestic sewage treatment system |
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| CN201921908980.XU CN211255623U (en) | 2019-11-07 | 2019-11-07 | Distributed rural domestic sewage treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655281A (en) * | 2019-11-07 | 2020-01-07 | 湖南九层台环境科技有限公司 | Distributed rural domestic sewage treatment system and treatment method |
| CN113788543A (en) * | 2021-09-26 | 2021-12-14 | 同济大学 | Rural sewage treatment system based on stabilization pond |
-
2019
- 2019-11-07 CN CN201921908980.XU patent/CN211255623U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655281A (en) * | 2019-11-07 | 2020-01-07 | 湖南九层台环境科技有限公司 | Distributed rural domestic sewage treatment system and treatment method |
| CN113788543A (en) * | 2021-09-26 | 2021-12-14 | 同济大学 | Rural sewage treatment system based on stabilization pond |
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