CN111977898A - Method for improving rural sewage treatment - Google Patents
Method for improving rural sewage treatment Download PDFInfo
- Publication number
- CN111977898A CN111977898A CN202010805093.0A CN202010805093A CN111977898A CN 111977898 A CN111977898 A CN 111977898A CN 202010805093 A CN202010805093 A CN 202010805093A CN 111977898 A CN111977898 A CN 111977898A
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- Prior art keywords
- sewage
- sewage treatment
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- rural
- rural sewage
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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
- C02F7/00—Aeration of stretches of water
Abstract
The invention discloses a method for improving rural sewage treatment. The method for improving the rural sewage treatment is simple and scientific in process, and finally realizes low-cost and high-efficiency filtration and purification of rural sewage through primary filtration, sedimentation, aeration, secondary filtration and secondary sedimentation and filtration in a biological tank. In a word, the method for improving rural sewage treatment is stable and reliable, the occupied area of the related sewage treatment equipment is small, the construction is easy, the maintenance is simple and convenient, the capital investment is low, and the operating cost is low; the damage of ecological environment and the generation of black and odorous water are avoided, the rural sewage treatment effect is stable, the operation cost is relatively low, the rural sewage is comprehensively utilized to the maximum extent through a reasonable sewage treatment method, and the method is suitable for popularization and use.
Description
Technical Field
The invention belongs to the technical field of environmental management, and particularly relates to a method for improving rural sewage treatment.
Background
With the continuous development of rural economy and the continuous improvement of the requirements of people on the quality of rural living environment, the new rural construction gradually promoted by governments at all levels greatly improves the living environment of farmers. But the contradiction between the relative lag of infrastructure construction in rural areas and the pollution of rural scattered point sources is increasingly prominent, and the problem of rural water environment pollution is urgently solved.
The rural sewage treatment technology which is limited by various factors such as regional economic conditions, climatic conditions, village land resources and the like, low in development investment, small in occupied area, stable and reliable in treated water quality, low in running cost and simple in operation is an important development trend in the field of current water treatment, and meanwhile, due to the fact that technical personnel are lack and economic strength is weak in rural areas, development of the rural sewage treatment technology is limited. In vast rural areas, due to limited conditions, especially weak power supply systems and the lack of professional technicians, various rural sewage treatment equipment consuming electric power and kinetic energy are mostly in an off-stream state or a semi-off-stream state, domestic rural sewage cannot be effectively and timely treated, and a large amount of untreated domestic rural sewage pollutes the ecological environment of the rural areas.
The conventional rural sewage treatment method mainly comprises an efficient algae pond, an oxidation pond, a contact oxidation method and the like, wherein the efficient algae pond has short retention time, small occupied area, easy construction, simple and convenient maintenance, low capital construction investment and low operating cost compared with the conventional stabilization pond; the removal efficiency of ammonia nitrogen and pathogens is high, but the ammonia nitrogen and the pathogens are easily influenced by environmental factors such as temperature, ph and the like; the oxidation pond has low removal efficiency, is easy to cause ecological damage to become black and odorous water, has good contact oxidation treatment effect, but has large sewage treatment capital cost and sewage treatment operating cost, so a method for improving rural sewage treatment needs to be found, the rural sewage treatment effect is stable, the operating cost is relatively low, and the rural sewage is comprehensively utilized to the maximum extent through a reasonable sewage treatment method.
Disclosure of Invention
The invention aims to provide a method for improving rural sewage treatment, which aims to solve the problems of poor rural sewage treatment effect and high cost in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for improving rural sewage treatment is characterized by comprising the following steps:
(1) firstly, introducing rural sewage into a grid well for impurity removal, wherein the grid well is composed of square grids with the side length of 2-3 cm, and floating materials and large-diameter impurities in the sewage are filtered out by the grid well;
(2) then, the effluent from the grid well enters a first sedimentation tank, the first sedimentation tank carries out preliminary static sedimentation on the inflowing sewage, so that impurities with higher specific gravity in the sewage are statically precipitated to the bottom of the first sedimentation tank, and the sludge at the bottom of the first sedimentation tank is cleaned at regular time;
(3) then, the sewage after primary precipitation which overflows from the top of the first precipitation tank enters a first purification chamber, lime powder is put into the first purification chamber, the use amount of the lime powder is one thousandth of the weight of the water in the first purification chamber, the lime powder is uniformly scattered in the first purification chamber, and the sewage is primarily purified;
(4) then, introducing the sewage into an aeration tank, wherein the sewage stays in the aeration tank for at least 48 hours, and aeration is ensured for 5-10 minutes every half hour;
(5) the effluent of the aeration tank enters a second purification chamber, a filter bed is arranged in the second purification chamber, the filter bed sequentially comprises a cobble layer, a gravel layer, a coarse sand layer, a fine sand layer and a mud layer from top to bottom, and the sewage after purification is discharged from the bottom of the mud layer;
(6) and finally, the sewage enters a second sedimentation tank, the second sedimentation tank is used for planting a plant layer on the artificial wetland, the planted plants are moss or lichens, and the rural sewage is subjected to filtration and sedimentation treatment in the last procedure to finish village sewage treatment.
Preferably, the grid well is composed of a square grid with the side length of 2.5 centimeters.
Preferably, the time for the first sedimentation tank to perform preliminary static sedimentation on the influent wastewater is 18 to 22 hours.
Preferably, the sewage stays in the aeration tank for 60 hours, and the temperature in the aeration tank is controlled to be 20-25 ℃.
Preferably, the particle size of cobbles in the cobble layer is 2-5 cm, and the particle size of broken stones in the gravel layer is 0.5-1 cm.
Preferably, the thicknesses of the cobble layer, the gravel layer, the coarse sand layer and the fine sand layer are increased in sequence.
Preferably, the residence time of the sewage in the second sedimentation tank is 8-10 hours.
The method for improving the rural sewage treatment is simple and scientific in process, and finally realizes low-cost and high-efficiency filtration and purification of rural sewage through primary filtration, sedimentation, aeration, secondary filtration and secondary sedimentation and filtration in a biological tank. In a word, the method for improving rural sewage treatment is stable and reliable, the occupied area of the related sewage treatment equipment is small, the construction is easy, the maintenance is simple and convenient, the capital investment is low, and the operating cost is low; the damage of ecological environment and the generation of black and odorous water are avoided, the rural sewage treatment effect is stable, the operation cost is relatively low, the rural sewage is comprehensively utilized to the maximum extent through a reasonable sewage treatment method, and the method is suitable for popularization and use.
Detailed Description
The technical scheme provided by the invention is as follows: a method for improving rural sewage treatment comprises the following steps:
(1) firstly, introducing rural sewage into a grid well for impurity removal, wherein the grid well is composed of square grids with the side length of 2-3 cm, and floating materials and large-diameter impurities in the sewage are filtered out by the grid well;
(2) then, the effluent from the grid well enters a first sedimentation tank, the first sedimentation tank carries out preliminary static sedimentation on the inflowing sewage, so that impurities with higher specific gravity in the sewage are statically precipitated to the bottom of the first sedimentation tank, and the sludge at the bottom of the first sedimentation tank is cleaned at regular time;
(3) then, the sewage after primary precipitation which overflows from the top of the first precipitation tank enters a first purification chamber, lime powder is put into the first purification chamber, the use amount of the lime powder is one thousandth of the weight of the water in the first purification chamber, the lime powder is uniformly scattered in the first purification chamber, and the sewage is primarily purified;
(4) then, introducing the sewage into an aeration tank, wherein the sewage stays in the aeration tank for at least 48 hours, and aeration is ensured for 5-10 minutes every half hour;
(5) the effluent of the aeration tank enters a second purification chamber, a filter bed is arranged in the second purification chamber, the filter bed sequentially comprises a cobble layer, a gravel layer, a coarse sand layer, a fine sand layer and a mud layer from top to bottom, and the sewage after purification is discharged from the bottom of the mud layer;
(6) and finally, the sewage enters a second sedimentation tank, the second sedimentation tank is used for planting a plant layer on the artificial wetland, the planted plants are moss or lichens, and the rural sewage is subjected to filtration and sedimentation treatment in the last procedure to finish village sewage treatment.
The sewage treatment device is characterized in that the grid well is composed of square grids with the side length of 2.5 cm, the primary static sedimentation time of inflow sewage in the first sedimentation tank is 18-22 hours, the sewage stays in the aeration tank for 60 hours, the temperature in the aeration tank is controlled to be 20-25 ℃, the particle size of cobblestones in the cobblestone layer is 2-5 cm, the particle size of broken stones in the gravel layer is 0.5-1 cm, the thicknesses of the cobblestone layer, the gravel layer, the coarse sand layer and the fine sand layer are sequentially increased, and the stay time of the sewage in the second sedimentation tank is 8-10 hours.
The method for improving the rural sewage treatment is simple and scientific in process, and finally realizes low-cost and high-efficiency filtration and purification of rural sewage through primary filtration, sedimentation, aeration, secondary filtration and secondary sedimentation and filtration in a biological tank. In a word, the method for improving rural sewage treatment is stable and reliable, the occupied area of the related sewage treatment equipment is small, the construction is easy, the maintenance is simple and convenient, the capital investment is low, and the operating cost is low; the damage of ecological environment and the generation of black and odorous water are avoided, the rural sewage treatment effect is stable, the operation cost is relatively low, the rural sewage is comprehensively utilized to the maximum extent through a reasonable sewage treatment method, and the method is suitable for popularization and use.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A method for improving rural sewage treatment is characterized by comprising the following steps:
(1) firstly, introducing rural sewage into a grid well for impurity removal, wherein the grid well is composed of square grids with the side length of 2-3 cm, and floating materials and large-diameter impurities in the sewage are filtered out by the grid well;
(2) then, the effluent from the grid well enters a first sedimentation tank, the first sedimentation tank carries out preliminary static sedimentation on the inflowing sewage, so that impurities with higher specific gravity in the sewage are statically precipitated to the bottom of the first sedimentation tank, and the sludge at the bottom of the first sedimentation tank is cleaned at regular time;
(3) then, the sewage after primary precipitation which overflows from the top of the first precipitation tank enters a first purification chamber, lime powder is put into the first purification chamber, the use amount of the lime powder is one thousandth of the weight of the water in the first purification chamber, the lime powder is uniformly scattered in the first purification chamber, and the sewage is primarily purified;
(4) then, introducing the sewage into an aeration tank, wherein the sewage stays in the aeration tank for at least 48 hours, and aeration is ensured for 5-10 minutes every half hour;
(5) the effluent of the aeration tank enters a second purification chamber, a filter bed is arranged in the second purification chamber, the filter bed sequentially comprises a cobble layer, a gravel layer, a coarse sand layer, a fine sand layer and a mud layer from top to bottom, and the sewage after purification is discharged from the bottom of the mud layer;
(6) and finally, the sewage enters a second sedimentation tank, the second sedimentation tank is used for planting a plant layer on the artificial wetland, the planted plants are moss or lichens, and the rural sewage is subjected to filtration and sedimentation treatment in the last procedure to finish village sewage treatment.
2. The rural sewage treatment method of claim 1, wherein the grid well is a square grid with a side length of 2.5 cm.
3. The rural sewage treatment method of claim 1, wherein the time for the first sedimentation tank to perform preliminary static sedimentation on the influent sewage is 18-22 hours.
4. The rural sewage treatment method of claim 1, wherein the sewage stays in the aeration tank for 60 hours, and the temperature in the aeration tank is controlled to be 20-25 ℃.
5. The rural sewage treatment method of claim 1, wherein the particle size of the cobbles in the cobble layer is 2-5 cm, and the particle size of the crushed stones in the crushed stone layer is 0.5-1 cm.
6. The rural sewage treatment method of claim 1, wherein the thicknesses of the cobble layer, the gravel layer, the coarse sand layer and the fine sand layer are increased in sequence.
7. The rural sewage treatment method of claim 1, wherein the residence time of the sewage in the second sedimentation tank is 8-10 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010805093.0A CN111977898A (en) | 2020-08-12 | 2020-08-12 | Method for improving rural sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010805093.0A CN111977898A (en) | 2020-08-12 | 2020-08-12 | Method for improving rural sewage treatment |
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| CN111977898A true CN111977898A (en) | 2020-11-24 |
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| CN202010805093.0A Pending CN111977898A (en) | 2020-08-12 | 2020-08-12 | Method for improving rural sewage treatment |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882898A (en) * | 2016-12-14 | 2017-06-23 | 苏州润弘贸易有限公司 | A kind of method of Combined Treatment domestic sewage in rural areas |
| CN108147624A (en) * | 2018-01-25 | 2018-06-12 | 南昌工程学院 | A kind of processing method of country sewage |
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2020
- 2020-08-12 CN CN202010805093.0A patent/CN111977898A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882898A (en) * | 2016-12-14 | 2017-06-23 | 苏州润弘贸易有限公司 | A kind of method of Combined Treatment domestic sewage in rural areas |
| CN108147624A (en) * | 2018-01-25 | 2018-06-12 | 南昌工程学院 | A kind of processing method of country sewage |
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Application publication date: 20201124 |
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