CN106746387B - Distributed sewage treatment method - Google Patents
Distributed sewage treatment method Download PDFInfo
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- CN106746387B CN106746387B CN201710210370.1A CN201710210370A CN106746387B CN 106746387 B CN106746387 B CN 106746387B CN 201710210370 A CN201710210370 A CN 201710210370A CN 106746387 B CN106746387 B CN 106746387B
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/284—Anaerobic digestion processes using anaerobic baffled reactors
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a decentralized sewage treatment method, can solve the phenomenon that the sewage is directly discharged in some old cities and rural areas effectively, cause the water environment quality of some areas to worsen continuously, the problem which affects the resident daily life seriously, its technical scheme to solve is, the sewage enters the bottom of the pool body, under the high-speed impact of the influent stream, the sewage of bottom mixes with mud, the sewage enters the first filtering unit, the sewage flows from top to bottom, first through the first grit layer, then enters the zeolite packing layer, then enters the second filtering unit, via the blast furnace slag packing layer, enters the tire fragment packing layer and the second grit layer, finally discharges from the outlet, the method of the invention is simple, easy to operate and maintain, can remove COD and BOD in the water in a large amount through anaerobic digestion, can further remove organic pollutant in the filtering process, at the same time the addition of the specific filler strengthens the denitrification dephosphorization effect, is an innovation in the sewage treatment method.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a distributed sewage treatment method.
Background
Due to the loss of a sewage treatment pipe network, the phenomenon of directly discharging sewage exists in partial old cities and rural areas, so that the water environment quality of partial areas is continuously deteriorated, malodor and mosquitoes and flies are bred, the daily life of residents is seriously affected, and how to reduce the directly discharging sewage is an urgent need for eliminating the black and odorous water body and protecting and improving the water environment quality at present. Therefore, the improvement of the sewage treatment method is a problem which needs to be solved at present.
Disclosure of Invention
In view of the above situation, the present invention aims to provide a distributed sewage treatment method, which can effectively solve the problem that the daily life of residents is seriously affected due to continuous deterioration of water environment quality in some regions caused by the direct discharge of sewage in some old cities and rural areas, accompanied by malodor and breeding of mosquitoes and flies.
The technical scheme of the invention comprises the following steps:
1) sewage enters the bottom of the improved anaerobic digestion tank from a sealing cover at the top of the tank body through a central water inlet pipe, the sewage at the bottom is mixed with sludge under the high-speed impact of inlet water flow, the sewage flows from bottom to top through the through holes on the baffle plate under the pressure action, and most of particles are intercepted by the baffle plate;
2) sewage enters the first filtering unit through an overflow water outlet above the tank body, biogas generated by anaerobic fermentation rises to the top and escapes from a biogas collecting valve on the sealing cover, and sludge is discharged from a sludge discharge port;
3) the sewage entering the first filtering unit is uniformly distributed under the action of a water distribution pipeline of the overflow water outlet, flows from top to bottom, passes through the first gravel layer firstly, and then enters the zeolite filler layer;
4) the sewage entering the zeolite filler layer flows horizontally from the bottom, enters the second filtering unit, passes through the blast furnace slag filler layer, enters the tire fragment filler layer and the second gravel layer upwards, and is finally discharged from the water outlet.
The method is simple, the structural design is reasonable, the operation and maintenance are convenient, a large amount of COD and BOD in the water can be removed through anaerobic digestion, organic pollutants can be further removed in the filtering process, meanwhile, the effect of nitrogen and phosphorus removal is enhanced by adding the specific filler, the water quality of the effluent is better guaranteed, and the method is an innovation in a sewage treatment method.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1 is a central water inlet pipe, 2 is a sealing cover, 3 is a tank body, 4 is a baffle plate, 5 is a sludge discharge port, 6 is a methane collection valve, 7 is an overflow water outlet, 8 is a first filtering unit, 9 is a second filtering unit, 10 is a first gravel layer, 11 is a zeolite packing layer, 12 is a blast furnace slag packing layer, 13 is a tire fragment packing layer, 14 is a water outlet, and 15 is a second gravel layer.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in figure 1, the invention utilizes a decentralized sewage treatment plant, and then proceeds according to the following steps:
1) sewage enters the bottom of a pool body 3 from a sealing cover 2 at the top of an improved anaerobic digestion pool through a central water inlet pipe 1, the sewage at the bottom is mixed with sludge under the high-speed impact of inlet water flow, the sewage flows from bottom to top through the through holes on the baffle plate 4 under the pressure action, and most of particulate matters are intercepted by the baffle plate 4;
2) sewage enters a first filtering unit 8 through an overflow water outlet 7 above the tank body 3, biogas generated by anaerobic fermentation rises to the top and escapes from a biogas collecting valve 6 on the sealing cover 2, and sludge is discharged from a sludge discharge port 5;
3) sewage entering the first filtering unit 8 is uniformly distributed under the action of a water distribution pipeline of the overflow water outlet 7, flows from top to bottom, passes through the first gravel layer 10, intercepts suspended matters coming out of the anaerobic digestion tank through gravel filtering crops, and then enters the zeolite filler layer 11, so that a large amount of ammonia nitrogen in the sewage can be adsorbed, a small amount of phosphorus can be adsorbed, and the microbial nitrogen and phosphorus removal efficiency of the wetland system can be improved;
4) the sewage that gets into zeolite packing layer 11 gets into second filter element 9 from bottom horizontal flow, and through blast furnace slag packing layer 12, the phosphorus in the adsorption sewage improves constructed wetland's treatment effeciency to the phosphorus, up gets into tire piece packing layer 13 and second gravel layer 15, and nitrate in the tire piece packing layer 13 adsorbs the sewage reduces play water nitrate content, and second gravel layer 15 can prevent that the tire piece from losing, discharges from outlet 14 at last.
In order to ensure the using effect, the distributed sewage treatment device comprises an improved anaerobic digestion tank and a filtering system, the improved anaerobic digestion tank comprises a tank body, a sealing cover and a central water inlet pipe, the top of the tank body 3 is provided with the sealing cover 2, the central water inlet pipe 1 penetrates through the center of the sealing cover 2 and extends into the bottom of the tank body 3, a baffle plate 4 is fixed on the central water inlet pipe 1, the upper part of the tank body 3 is provided with an overflow water outlet 7, one side of the bottom is provided with a sludge discharge port 5, the filtering system is divided into two units, the bottoms of a first filtering unit 8 and a second filtering unit 9 are communicated, a first gravel layer 10 is arranged in the first, the zeolite packing layer 11 is provided with a blast furnace slag packing layer 12, a tire fragment packing layer 13 and a second gravel layer 15 from bottom to top in the second filtering unit 9 from top to bottom in the water flow direction, and the water outlet 14 is arranged on the second filtering unit 9 from bottom to top in the water flow direction.
3 baffle plates 4 are fixed on the central water inlet pipe 1 at equal intervals, the height difference between the baffle plates 4 is 0.3-0.5m, the diameter of the baffle plates is equal to the inner diameter of the tank body 3, a plurality of through holes are arranged on the baffle plates 4, sewage can only rise through the through holes on the plates in the normal operation process, and the sewage flows downwards through the through holes on the plates in the sludge discharge period.
The position of the perforation between the baffle plates 4 is different, so that the water flow is not in linear motion in the ascending process, the retention time of sewage is prolonged, the sewage ascends, the water flow frequently collides with the baffle plates 4, the sewage mixing effect is good, the particles are more easily settled to the bottom after colliding in the ascending process, the treatment effect on organic matters is enhanced, and the content of suspended matters in the sewage can be effectively reduced.
The top sealing cover 2 of the tank body is provided with a methane collecting valve 6 which is externally connected with a corresponding gas collecting and purifying system.
The opening position of the overflow water outlet 7 is higher than the baffle plate 4, and a height difference is kept between the overflow water outlet and the sealing cover 2.
The first gravel layer 10 is made of gravel and has a height of 20-30cm, the zeolite filler layer 11 is made of zeolite and has a height of 70-80cm, the first gravel layer 10 has the function of intercepting suspended matters coming out of the anaerobic digestion tank through gravel filtering crops, and the zeolite filler layer 11 has the function of adsorbing a large amount of ammonia nitrogen in sewage and a small amount of phosphorus, so that the microbial nitrogen and phosphorus removal efficiency of the wetland system is improved.
And the water flow is kept through between the first filtering unit 8 and the second filtering unit 9 in a mode of opening holes at the bottom and adding a screen.
The blast furnace slag packing layer 12 is composed of blast furnace slag with the height of 40-50cm, the tire fragment packing layer 13 is composed of tire fragments with the height of 30-40cm, and the second gravel layer 15 is composed of gravel with the height of 10-20 cm; the blast furnace slag packing layer 12 has the effects of adsorbing a large amount of phosphorus in the sewage and improving the phosphorus treatment efficiency of the constructed wetland, the tire fragment packing layer 13 has the effects of adsorbing a large amount of nitrate in the sewage and reducing the content of nitrate in effluent, and the second gravel layer 15 has the effects of preventing the loss of tire fragments.
The water outlet 14 is positioned at the top of the second filtering unit 9 and is lower than the overflow water outlet 7, so that water can be discharged from the water outlet without the aid of external force.
The using condition of the invention is that the invention comprises an improved anaerobic digestion tank and a filtering system, sewage enters the bottom of a tank body 3 from a sealing cover 2 at the top of the improved anaerobic digestion tank through a central water inlet pipe 1, then slowly rises through a baffle plate 4 and flows out from an overflow water outlet 7 at the upper part of the tank body 3, biogas generated by anaerobic fermentation is collected through a biogas collecting valve 6 at the top of the tank body 3, the filtering system is divided into two units, the first unit is communicated with the bottom of the second unit, the first unit is filled with gravel and zeolite, the water flow direction is from top to bottom, the second unit is filled with blast furnace slag, tire fragments and gravel, the water flow direction is from bottom to top, the sewage overflowing from the improved anaerobic digestion tank uniformly enters the filtering system through a water distribution pipeline at the overflow water outlet, the water outlet of the second filtering unit adopts an overflow weir mode, the height of an overflow weir is lower than that of the, when the water level of the first filtering unit is higher than the height of the overflow weir of the second filtering unit, the treated water flows out from a water outlet 14 of the overflow weir, and the sludge at the bottom of the pool is periodically extracted by a sludge pump through a sludge outlet 5.
Example 1, treatment capacity 10 tons/day, influent BOD5The average value is 254mg/L, the COD average value is 448mg/L, the total phosphorus is 6mg/L, the ammonia nitrogen is 51mg/L, the temperature is 25 ℃, and the hydraulic retention time is 24h5The average removal rate is 79.4 percent, the average removal rate of COD is 86.2 percent, the removal rate of ammonia nitrogen is 80 percent, and the removal rate of total phosphorus is 70 percent.
Example 2 treatment capacity of 10 ton/day, BOD of influent water5The average value is 254mg/L, the COD average value is 448mg/L, the total phosphorus is 6mg/L, the ammonia nitrogen is 51mg/L, the temperature is 15 ℃, and the hydraulic retention time is 24h5The average removal rate is 48.2 percent, the average removal rate of COD is 42.6 percent, the removal rate of ammonia nitrogen is 50 percent, and the total removal rate of phosphorus is 48 percent.
According to the daily water consumption of 200L per person, 10 tons of water consumption is equivalent to 50 persons, at most 2-14 persons are used in each building in the old residential district without a drainage pipe network at present, 3-4 persons are used in one household on average, and the total number is about 50.
The invention can effectively realize the treatment of the domestic water of the residential area, can greatly reduce the discharge of water pollutants, and can restrain the problem of water environment pollution from the source, and can also be used in residential areas and rural areas of a sewage and drainage pipe network, so that the domestic sewage can be effectively treated, the water environment pressure can be effectively relieved, the operation is simple, the use is convenient, the operation cost is low, and the invention is an innovation in a sewage treatment method and has good social and economic benefits.
Claims (10)
1. A distributed sewage treatment method is characterized in that a distributed sewage treatment device is utilized, and then the method comprises the following steps:
1) sewage enters the bottom of the pool body (3) from a sealing cover (2) at the top of the improved anaerobic digestion pool through a central water inlet pipe (1), the sewage at the bottom is mixed with sludge under the high-speed impact of inflow water flow, the sewage flows from bottom to top through holes in a baffle plate (4) under the action of pressure, most of particulate matters are intercepted by the baffle plate (4), the improved anaerobic digestion pool consists of the pool body, the sealing cover and a central water inlet pipe, the sealing cover (2) is arranged at the top of the pool body (3), the central water inlet pipe (1) penetrates through the center of the sealing cover (2) and extends into the bottom of the pool body (3), the baffle plate (4) is fixed on the central water inlet pipe (1), an overflow water outlet (7) is arranged at the upper part of;
2) sewage enters a first filtering unit (8) through an overflow water outlet (7) above the tank body (3), biogas generated by anaerobic fermentation rises to the top and escapes from a biogas collecting valve (6) on the sealing cover (2), and sludge is discharged from a sludge discharge port (5);
3) sewage entering the first filtering unit (8) is uniformly distributed under the action of a water distribution pipeline of the overflow water outlet (7), flows from top to bottom, passes through the first gravel layer (10), intercepts suspended matters coming out of the anaerobic digestion tank through gravel filtering crops, and then enters the zeolite packing layer (11), so that a large amount of ammonia nitrogen in the sewage can be adsorbed, a small amount of phosphorus can be adsorbed, and the microbial nitrogen and phosphorus removal efficiency of the wetland system can be improved;
4) the sewage entering the zeolite packing layer (11) flows horizontally from the bottom to enter the second filtering unit (9), the sewage is adsorbed by the blast furnace slag packing layer (12), the phosphorus treatment efficiency of the constructed wetland on the phosphorus is improved, the sewage upwards enters the tire fragment packing layer (13) and the second gravel layer (15), the tire fragment packing layer (13) adsorbs nitrate in the sewage, the content of the nitrate in the effluent is reduced, the second gravel layer (15) can prevent the loss of tire fragments, and the sewage is finally discharged from the water outlet (14).
2. The decentralized sewage treatment method according to claim 1, wherein the decentralized sewage treatment device comprises an improved anaerobic digestion tank and a filtering system, the filtering system is divided into two units, the bottom of the first filtering unit (8) is communicated with the bottom of the second filtering unit (9), a first gravel layer (10) and a zeolite packing layer (11) are arranged in the first filtering unit (8) from top to bottom, the water flow direction is from top to bottom, a blast furnace slag packing layer (12), a tire fragment packing layer (13) and a second gravel layer (15) are arranged in the second filtering unit (9) from bottom to top, the water flow direction is from bottom to top, and a water outlet (14) is arranged on the second filtering unit (9).
3. The decentralized wastewater treatment method according to claim 2, wherein the number of the baffle plates (4) is 3, the baffle plates are fixed on the central water inlet pipe (1) at equal intervals, the height difference between the baffle plates (4) is 0.3-0.5m, the diameter of the baffle plates is equivalent to the inner diameter of the tank body (3), the baffle plates (4) are provided with a plurality of perforations, wastewater can only rise through the perforations on the plates during normal operation, and the wastewater flows downwards through the perforations on the plates during sludge discharge.
4. The decentralized sewage treatment method according to claim 3, wherein the positions of the perforations between the baffle plates (4) are different, so that the water flow is not in linear motion in the ascending process, the retention time of the sewage is increased, and meanwhile, in the ascending process of the sewage, the water flow frequently collides with the baffle plates (4), so that the sewage mixing effect is good, and the particles are more likely to settle to the bottom after colliding in the ascending process, so that the treatment effect on organic matters is enhanced, and the content of suspended matters in the sewage can be effectively reduced.
5. The decentralized wastewater treatment method according to claim 2, wherein the tank top sealing cover (2) is provided with a biogas collection valve (6) externally connected with a corresponding gas collection and purification system.
6. The decentralized wastewater treatment process according to claim 2, wherein the overflow outlet (7) is opened at a position higher than the baffle plate (4) and has a height difference with the sealing cover (2).
7. The decentralized wastewater treatment method according to claim 2, wherein the first gravel layer (10) is made of gravel and has a height of 20-30cm, and the zeolite filler layer (11) is made of zeolite and has a height of 70-80 cm.
8. The decentralized wastewater treatment method according to claim 2, wherein the first filter unit (8) and the second filter unit (9) are kept in water flow communication by means of bottom openings and screens.
9. The decentralized wastewater treatment method according to claim 2, wherein the blast furnace slag filler layer (12) is composed of blast furnace slag and has a height of 40-50cm, the tire debris filler layer (13) is composed of tire debris and has a height of 30-40cm, and the second gravel layer (15) is composed of gravel and has a height of 10-20 cm.
10. The decentralized wastewater treatment process according to claim 2, wherein the drainage outlet (14) is located at the top of the second filtration unit (9) at a level lower than the overflow outlet (7) to ensure that the water flow can be drained from the drainage outlet without the aid of external force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710210370.1A CN106746387B (en) | 2017-03-31 | 2017-03-31 | Distributed sewage treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710210370.1A CN106746387B (en) | 2017-03-31 | 2017-03-31 | Distributed sewage treatment method |
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| CN106746387A CN106746387A (en) | 2017-05-31 |
| CN106746387B true CN106746387B (en) | 2020-05-12 |
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| CN201710210370.1A Expired - Fee Related CN106746387B (en) | 2017-03-31 | 2017-03-31 | Distributed sewage treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107117783B (en) * | 2017-07-03 | 2021-01-29 | 深圳市深水水务咨询有限公司 | Domestic sewage treatment system and method |
| CN110228900A (en) * | 2019-05-31 | 2019-09-13 | 中运建设控股有限公司 | A kind of system and method for river and lake sewage purification |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336337A (en) * | 1995-10-27 | 2002-02-20 | 三洸水机株式会社 | Sewer/waste-water treatment equipment |
| CN101037269A (en) * | 2007-04-24 | 2007-09-19 | 浙江大学 | Helical self-circulating biology reactor |
| CN104098224A (en) * | 2014-06-25 | 2014-10-15 | 四川农业大学 | Country distributed domestic sewage treating system and method |
| CN104496113A (en) * | 2014-12-11 | 2015-04-08 | 浙江晶泉水处理设备有限公司 | Distributed sewage treatment system |
| CN205874007U (en) * | 2016-07-31 | 2017-01-11 | 中国电建集团贵阳勘测设计研究院有限公司 | Compound anaerobic reactor of baffling formula |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10167216B2 (en) * | 2012-09-14 | 2019-01-01 | Gregory D. Graves | High efficiency wastewater treatment system |
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- 2017-03-31 CN CN201710210370.1A patent/CN106746387B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336337A (en) * | 1995-10-27 | 2002-02-20 | 三洸水机株式会社 | Sewer/waste-water treatment equipment |
| CN101037269A (en) * | 2007-04-24 | 2007-09-19 | 浙江大学 | Helical self-circulating biology reactor |
| CN104098224A (en) * | 2014-06-25 | 2014-10-15 | 四川农业大学 | Country distributed domestic sewage treating system and method |
| CN104496113A (en) * | 2014-12-11 | 2015-04-08 | 浙江晶泉水处理设备有限公司 | Distributed sewage treatment system |
| CN205874007U (en) * | 2016-07-31 | 2017-01-11 | 中国电建集团贵阳勘测设计研究院有限公司 | Compound anaerobic reactor of baffling formula |
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