CN111333263A - Multistage drop reoxygenation combined facultative biological filter sewage treatment system - Google Patents
Multistage drop reoxygenation combined facultative biological filter sewage treatment system Download PDFInfo
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- CN111333263A CN111333263A CN202010156526.4A CN202010156526A CN111333263A CN 111333263 A CN111333263 A CN 111333263A CN 202010156526 A CN202010156526 A CN 202010156526A CN 111333263 A CN111333263 A CN 111333263A
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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
- C02F3/02—Aerobic processes
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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
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Abstract
The invention provides a sewage treatment system of a multi-stage drop water reoxygenation combined facultative biological filter, which comprises a multi-stage drop water reoxygenation tower and a facultative biological filter which are communicated in sequence; the multistage drop water reoxygenation tower comprises drop water chambers above 3 stages, the drop water chambers above 3 stages are sequentially arranged from top to bottom, each drop water chamber is provided with a side wall and a bottom wall and does not have a top wall, a water distribution pipe is arranged at the bottom of each drop water chamber, the vertical projection of the outlet of the water distribution pipe of the last drop water chamber is positioned on the bottom wall of the next drop water chamber, the water distribution pipe of the lowest drop water chamber is communicated with the facultative biological filter, and the multistage drop water reoxygenation tower is provided with vent holes; the facultative biological filter is provided with polyvinyl chloride oblique staggered corrugated plates. The sewage treatment system of the multi-stage drop reoxygenation combined facultative biological filter can run without power or micro-power, saves energy, occupies small area and has good treatment effect on solid wastes and organic matters in sewage.
Description
Technical Field
The invention relates to the field of sewage treatment equipment of environmental engineering, in particular to a sewage treatment system of a multi-stage drop reoxygenation combined facultative biological filter.
Background
Along with the development of society, rural domestic sewage volume increases gradually, because integrated sewage treatment plant has the advantage such as the removal is convenient, the handling capacity is nimble changeable, construction cycle is short, fine solution some sewage treatment projects especially rural areas etc. exist the sewage water yield less, the sewage is collected the problem difficult, project cycle is short, therefore integrated sewage treatment plant is in the decentralized domestic sewage treatment extensive application.
For an integrated sewage treatment device, the current common treatment process is mainly A2O (anaerobic-anoxic-aerobic) process and its modification, oxidation ditch process, biological rotating disc process, SBR (sequencing batch reactor) process and its modification, MBR (membrane bioreactor) process, etc., but the existing processes usually have denitrification and removalPoor phosphorus effect, large occupied area of structures, complex technology, higher management difficulty and high investment cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a sewage treatment system of a multi-stage drop reoxygenation combined facultative biological filter.
In order to achieve the purpose, the invention adopts the technical scheme that: a sewage treatment system of a multi-stage drop reoxygenation combined facultative biological filter tank comprises a multi-stage drop reoxygenation tower and a facultative biological filter tank which are sequentially communicated;
the multistage drop water reoxygenation tower comprises drop water chambers with more than 3 levels, the drop water chambers with more than 3 levels are sequentially arranged from top to bottom, each drop water chamber is provided with a side wall and a bottom wall and does not have a top wall, a water distribution pipe is arranged at the bottom of each drop water chamber, the vertical projection of the outlet of the water distribution pipe of the last drop water chamber is positioned on the bottom wall of the next drop water chamber, the water distribution pipe of the lowest drop water chamber is communicated with the facultative biological filter, and the multistage drop water reoxygenation tower is provided with vent holes;
the facultative biological filter is provided with polyvinyl chloride oblique staggered corrugated plates.
Foretell multistage drop reoxygenation is united facultative biological filter sewage treatment system utilizes and sets up multistage drop hydroecium, utilize the solid pollutant in the high potential difference precipitation aquatic, and set up the ventilation hole, promote reoxygenation efficiency, the lower floor sets up the ventilation hole, guarantee that the tower is sufficient, multistage reoxygenation tower goes out water dissolved oxygen and promotes to combine facultative biological filter to carry out facultative biodegradation to sewage and filtration treatment, get rid of sewage pollutant, foretell multistage drop reoxygenation is united facultative biological filter sewage treatment system takes up an area of for a short time, solid waste and organic matter in the sewage have fine treatment effect, and set up the obliquely staggered buckled plate of polyvinyl chloride in facultative biological filter and be favorable to improving the treatment effeciency of facultative biological filter to organic matter in the sewage.
Preferably, the facultative biological filter is provided with water inlet and delivery port, the water inlet of facultative biological filter with the distribution pipe UNICOM of the one-level drop hydroecium of the bottommost of multistage drop reoxygenation tower, the water inlet of facultative biological filter is located the below of the crisscross buckled plate of polyvinyl chloride to one side, the delivery port of facultative biological filter is located the top of the crisscross buckled plate of polyvinyl chloride to one side.
Foretell combined facultative biological filter sewage treatment system's of multistage drop reoxygenation facultative biological filter's water inlet is located the below of the crisscross buckled plate of polyvinyl chloride slant, the delivery port of facultative biological filter is located the top of the crisscross buckled plate of polyvinyl chloride slant for the sewage that processes multistage drop reoxygenation tower treatment can pass through the crisscross buckled plate of polyvinyl chloride slant of facultative biological filter to the mode of upwelling, has further promoted the processing of facultative biological filter organic matter in to sewage, and has avoided the jam of facultative biological filter.
Preferably, in the multistage drop water reoxygenation tower, one stage of drop water chamber of two adjacent stages of drop water chambers is cylindrical and the other stage of drop water chamber is annular, and the drop water chambers of the multistage drop water reoxygenation tower have the same vertical axis.
According to the multi-stage drop reoxygenation combined facultative biological filter sewage treatment system, the drop chambers are designed into cylindrical one-stage drop chambers and cylindrical another-stage drop chambers, so that the multi-stage drop reoxygenation combined facultative biological filter sewage treatment system is small in occupied space, and the adjacent cylindrical and cylindrical rings improve dissolved oxygen of sewage in the multi-stage drop reoxygenation tower, and treatment of a subsequent facultative biological filter is facilitated.
Preferably, each stage of the drop chamber of the multistage drop reaeration tower is obliquely provided with a drop plate, the surface of the drop plate is wavy or zigzag, and the drop plate is made of a hydrophobic polymer material.
The surface of the drop plate of the sewage treatment system of the multistage drop reoxygenation combined facultative biological filter tank is wavy or zigzag, so that the dissolved oxygen of the sewage in the multistage drop reoxygenation tower is improved, and the subsequent treatment of the facultative biological filter tank is facilitated.
Preferably, the multi-stage drop water reaeration combined facultative biological filter sewage treatment system further comprises an adjusting tank, and the adjusting tank is communicated with the multi-stage drop water reaeration tower.
The sewage treatment system of the multi-stage drop reoxygenation combined facultative biological filter is provided with the adjusting tank for pretreatment, so that the blockage of the sewage treatment system of the multi-stage drop reoxygenation combined facultative biological filter is avoided.
Preferably, a grid is arranged in the adjusting tank.
The sewage treatment system of the multi-stage drop reoxygenation combined facultative biological filter is provided with the grids, so that large granular suspended matters in sewage can be filtered, and subsequent water distribution blockage is prevented.
Preferably, a lift pump is arranged between the regulating reservoir and the multistage drop water reoxygenation tower.
Preferably, the multistage drop reoxygenation tower comprises 4-8 stages of drop water chambers.
Preferably, the multistage drop reoxygenation tower comprises 5-stage drop chambers, the 5-stage drop chambers are sequentially a first-stage drop chamber, a second-stage drop chamber, a third-stage drop chamber, a fourth-stage drop chamber and a fifth-stage drop chamber from top to bottom, the first-stage drop chamber, the third-stage drop chamber and the fifth-stage drop chamber are in an annular column shape with equal diameter, the second-stage drop chamber and the fourth-stage drop chamber are in a cylindrical shape with equal diameter, and the first-stage drop chamber, the second-stage drop chamber, the third-stage drop chamber, the fourth-stage drop chamber and the fifth-stage drop chamber have the same vertical axis.
According to the multi-stage drop reoxygenation combined facultative biological filter sewage treatment system, the drop chambers are designed into the cylindrical first-stage drop chambers and the cylindrical second-stage drop chambers which are concentric, the 5-stage drop chambers are arranged, and the cylindrical first-stage drop chambers are annular, so that the multi-stage drop reoxygenation combined facultative biological filter sewage treatment system is small in occupied space, dissolved oxygen of sewage passing through the multi-stage drop reoxygenation tower is improved due to the adjacent cylindrical and annular columns, and treatment of a subsequent facultative biological filter is facilitated.
The invention has the beneficial effects that: the invention provides a multi-stage drop reoxygenation combined facultative biological filter sewage treatment system, which can run without power or micro power and save energy.
Drawings
Fig. 1 is a schematic structural diagram of a sewage treatment system of a multi-stage drop reaeration combined facultative biological filter according to an embodiment of the invention.
The system comprises a multistage drop water reoxygenation tower, a first-stage drop water chamber, a second-stage drop water chamber, a third-stage drop water chamber, a fourth-stage drop water chamber, a fifth-stage drop.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
The multistage drop water reoxygenation combined facultative biological filter sewage treatment system comprises a multistage drop water reoxygenation tower 1 and a facultative biological filter 3 which are sequentially communicated;
the multistage drop reoxygenation tower comprises drop water chambers with more than 3 levels, the drop water chambers with more than 3 levels are sequentially arranged from top to bottom, each drop water chamber is provided with a side wall and a bottom wall and does not have a top wall, the bottom of each drop water chamber is provided with a water distribution pipe 16, the vertical projection of the outlet of the water distribution pipe of the last drop water chamber is positioned on the bottom wall of the next drop water chamber, the water distribution pipe of the lowest drop water chamber is communicated with the facultative biological filter, and the multistage drop reoxygenation tower is provided with a vent hole 17;
the facultative biological filter is provided with a polyvinyl chloride oblique staggered corrugated plate 31.
Further, the density of the polyvinyl chloride oblique crossing corrugated plate is 140Kg/m3。
In order to make the sewage that the compound oxygen tower of multistage drop was handled can pass through the obliquely staggered buckled plate of polyvinyl chloride of facultative biological filter with the mode of upwelling in order to promote the processing of facultative biological filter organic matter in sewage, avoid the jam of facultative biological filter, facultative biological filter is provided with water inlet 32 and delivery port 33, facultative biological filter's water inlet with the distribution pipe UNICOM of the most lower one-level drop hydroecium of the compound oxygen tower of multistage drop, facultative biological filter's water inlet is located the below of the obliquely staggered buckled plate of polyvinyl chloride, facultative biological filter's delivery port is located the top of the obliquely staggered buckled plate of polyvinyl chloride.
Furthermore, in the multistage drop water reoxygenation tower, one stage of drop water chamber of two adjacent stages of drop water chambers is cylindrical, the other stage of drop water chamber is annular cylindrical, and the drop chambers of the multistage drop water reoxygenation tower have the same vertical axis. According to the multi-stage drop reoxygenation combined facultative biological filter sewage treatment system, the drop chambers are designed into cylindrical one-stage drop chambers and cylindrical another-stage drop chambers, so that the multi-stage drop reoxygenation combined facultative biological filter sewage treatment system is small in occupied space, and the adjacent cylindrical and cylindrical rings improve dissolved oxygen of sewage in the multi-stage drop reoxygenation tower, and treatment of a subsequent facultative biological filter is facilitated.
In order to improve the dissolved oxygen of sewage passing through the multistage drop reoxygenation tower, a drop plate 18 is obliquely arranged in each stage of drop chamber of the multistage drop reoxygenation tower, the surface of the drop plate is wavy or zigzag, and the drop plate is made of a hydrophobic polymer material.
Further, the multi-stage drop water reaeration combined facultative biological filter sewage treatment system also comprises an adjusting tank 2, and the adjusting tank is communicated with the multi-stage drop water reaeration tower.
In order to filter large particle suspended matters in the sewage and prevent subsequent water distribution blockage, a grid 21 is arranged in the adjusting tank.
Further, a lifting pump 4 is arranged between the regulating reservoir and the multistage drop water reoxygenation tower.
Further, the multistage drop reoxygenation tower comprises 4-8 stages of drop water chambers.
Further, multistage drop reoxygenation tower includes 5 grades of drop hydroeciums, 5 grades of drop hydroeciums are first order drop hydroecium 11, second level drop hydroecium 12, third level drop hydroecium 13, fourth level drop hydroecium 14 and fifth level drop hydroecium 15 from top to bottom in proper order, first order drop hydroecium, third level drop hydroecium and fifth level drop hydroecium are the column shape of the ring of constant diameter, second order drop hydroecium and fourth level drop hydroecium are the cylindric of constant diameter, first order drop hydroecium, second level drop hydroecium, third level drop hydroecium, fourth level drop hydroecium and fifth level drop hydroecium have the axle center of the same vertical direction.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A multi-stage drop reoxygenation combined facultative biological filter sewage treatment system is characterized by comprising a multi-stage drop reoxygenation tower and a facultative biological filter which are sequentially communicated;
the multistage drop water reoxygenation tower comprises drop water chambers with more than 3 levels, the drop water chambers with more than 3 levels are sequentially arranged from top to bottom, each drop water chamber is provided with a side wall and a bottom wall and does not have a top wall, a water distribution pipe is arranged at the bottom of each drop water chamber, the vertical projection of the outlet of the water distribution pipe of the last drop water chamber is positioned on the bottom wall of the next drop water chamber, the water distribution pipe of the lowest drop water chamber is communicated with the facultative biological filter, and the multistage drop water reoxygenation tower is provided with vent holes;
the facultative biological filter is provided with a polyvinyl chloride obliquely-staggered corrugated plate and a polyvinyl chloride obliquely-staggered corrugated plate.
2. The sewage treatment system of the combined facultative biological filter for multi-stage water dropping and reoxygenation as claimed in claim 1, wherein the facultative biological filter is provided with a water inlet and a water outlet, the water inlet of the facultative biological filter is communicated with the water distribution pipe of the lowest stage water dropping chamber of the multi-stage water dropping and reoxygenation tower, the water inlet of the facultative biological filter is located below the polyvinyl chloride obliquely-staggered corrugated plate, and the water outlet of the facultative biological filter is located above the polyvinyl chloride obliquely-staggered corrugated plate.
3. The combined facultative biological filter sewage treatment system of claim 1, wherein in the multi-stage drop reoxygenation tower, one drop chamber of adjacent two drop chambers is cylindrical and the other drop chamber is annular, and the drop chambers of the multi-stage drop reoxygenation tower have the same vertical axis.
4. The sewage treatment system of the multistage drop water reoxygenation combined facultative biological filter tank of claim 1, wherein a drop plate is obliquely arranged in each drop chamber of the multistage drop water reoxygenation tower, the surface of the drop plate is wavy or zigzag, and the drop plate is made of hydrophobic polymer materials.
5. The multi-stage drop reaeration combined facultative biological filter sewage treatment system of claim 1, further comprising a conditioning tank, said conditioning tank being in communication with said multi-stage drop reaeration tower.
6. The multi-stage drop reaeration combined facultative biological filter sewage treatment system of claim 5, wherein a grid is arranged in said conditioning tank.
7. The combined facultative biological filter sewage treatment system of claim 5, wherein a lift pump is arranged between the adjusting tank and the multi-stage drop reoxygenation tower.
8. The sewage treatment system of the combined facultative biological filter with multi-stage drop reoxygenation as claimed in claim 1, wherein the multi-stage drop reoxygenation tower comprises 4-8 stages of drop water chambers.
9. The combined facultative biological filter sewage treatment system according to claim 1, wherein the multistage drop reoxygenation tower comprises 5-stage drop chambers, the 5-stage drop chambers are sequentially a first-stage drop chamber, a second-stage drop chamber, a third-stage drop chamber, a fourth-stage drop chamber and a fifth-stage drop chamber from top to bottom, the first-stage drop chamber, the third-stage drop chamber and the fifth-stage drop chamber are in an annular column shape with equal diameter, the second-stage drop chamber and the fourth-stage drop chamber are in a cylindrical column shape with equal diameter, and the first-stage drop chamber, the second-stage drop chamber, the third-stage drop chamber, the fourth-stage drop chamber and the fifth-stage drop chamber have the same vertical axis center.
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| CN202010156526.4A CN111333263A (en) | 2020-03-09 | 2020-03-09 | Multistage drop reoxygenation combined facultative biological filter sewage treatment system |
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| CN202010156526.4A CN111333263A (en) | 2020-03-09 | 2020-03-09 | Multistage drop reoxygenation combined facultative biological filter sewage treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718068A (en) * | 2020-06-28 | 2020-09-29 | 安徽华骐环保科技股份有限公司 | Water distribution method for solving drop oxygenation of denitrification biological filter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948169A (en) * | 2010-09-08 | 2011-01-19 | 清华大学 | Drop biological aerated filter suitable for biological pretreatment of micro-polluted water source |
| CN202864995U (en) * | 2012-10-30 | 2013-04-10 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Biological stuffing suitable for biological filter and biological contact oxidation pond |
| CN103523940A (en) * | 2012-07-06 | 2014-01-22 | 成都市思博睿科技有限公司 | Controllable powerless aeration device |
| WO2014169622A1 (en) * | 2013-04-19 | 2014-10-23 | Jia Songyun | Low-power consumption and high-efficiency water body aeration and oxygenation device |
| CN104211179A (en) * | 2014-10-07 | 2014-12-17 | 重庆市农业科学院 | Household domestic sewage drop aeration biological enhanced treatment device |
| CN106894494A (en) * | 2017-03-03 | 2017-06-27 | 杜少平 | Diffusion collective-type reflux energy dissipating drop well |
| CN206308109U (en) * | 2016-11-03 | 2017-07-07 | 辽宁省环境科学研究院 | Wind nature oxygenation sewage-treatment plant is pulled out in one kind drop |
-
2020
- 2020-03-09 CN CN202010156526.4A patent/CN111333263A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948169A (en) * | 2010-09-08 | 2011-01-19 | 清华大学 | Drop biological aerated filter suitable for biological pretreatment of micro-polluted water source |
| CN103523940A (en) * | 2012-07-06 | 2014-01-22 | 成都市思博睿科技有限公司 | Controllable powerless aeration device |
| CN202864995U (en) * | 2012-10-30 | 2013-04-10 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Biological stuffing suitable for biological filter and biological contact oxidation pond |
| WO2014169622A1 (en) * | 2013-04-19 | 2014-10-23 | Jia Songyun | Low-power consumption and high-efficiency water body aeration and oxygenation device |
| CN104211179A (en) * | 2014-10-07 | 2014-12-17 | 重庆市农业科学院 | Household domestic sewage drop aeration biological enhanced treatment device |
| CN206308109U (en) * | 2016-11-03 | 2017-07-07 | 辽宁省环境科学研究院 | Wind nature oxygenation sewage-treatment plant is pulled out in one kind drop |
| CN106894494A (en) * | 2017-03-03 | 2017-06-27 | 杜少平 | Diffusion collective-type reflux energy dissipating drop well |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718068A (en) * | 2020-06-28 | 2020-09-29 | 安徽华骐环保科技股份有限公司 | Water distribution method for solving drop oxygenation of denitrification biological filter |
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Application publication date: 20200626 |