CN112174450A - Sewage purification system and purification method - Google Patents
Sewage purification system and purification method Download PDFInfo
- Publication number
- CN112174450A CN112174450A CN202011224403.6A CN202011224403A CN112174450A CN 112174450 A CN112174450 A CN 112174450A CN 202011224403 A CN202011224403 A CN 202011224403A CN 112174450 A CN112174450 A CN 112174450A
- Authority
- CN
- China
- Prior art keywords
- tank
- membrane
- aeration
- water
- aeration tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000010865 sewage Substances 0.000 title claims abstract description 34
- 238000000746 purification Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005273 aeration Methods 0.000 claims abstract description 60
- 239000012528 membrane Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 238000010992 reflux Methods 0.000 claims abstract description 15
- 239000010802 sludge Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims description 4
- 239000002957 persistent organic pollutant Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000005276 aerator Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001706 oxygenating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
- C02F3/12—Activated sludge processes
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Landscapes
- 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)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a sewage purification system and a purification method, and relates to the field of sewage purification. The purification system provided by the invention mainly comprises an aeration tank and a membrane tank, wherein an aeration pipe is arranged in the aeration tank, a solid-liquid separation membrane is arranged in the membrane tank, a reflux pump is arranged outside the membrane tank, a water inlet of the reflux pump is connected with a water outlet of the membrane tank, and a water outlet of the reflux pump is connected with the aeration tank; activated sludge is filled in the aeration tank; the system can effectively reduce the treatment load of the solid-liquid separation membrane by enabling clean water flowing out of the circulating membrane tank to enter the aeration tank, effectively reduce the cleaning period of the solid-liquid separation membrane, prolong the service life of the solid-liquid separation membrane, ensure that the quality of the outlet water reaches the standard, is suitable for domestic sewage with small water quantity and industrial sewage with similar water quality conditions, and has a wide application range.
Description
Technical Field
The invention relates to the field of sewage purification, in particular to a sewage purification system and a purification method.
Background
The split-type membrane-bioreactor separates the membrane module from the bioreactor. Pressurizing the mixed liquid in the bioreactor by a circulating pump, pumping the pressurized mixed liquid to the filtering end of the membrane component, and allowing the liquid in the mixed liquid to permeate the membrane under the action of pressure to form system treatment water; solid matter, macromolecular substance, etc. are intercepted by the membrane and return to the bioreactor along with the concentrated solution. The split-type membrane-bioreactor has the characteristics of stable and reliable operation, easy cleaning, replacement and addition of membranes and generally larger membrane flux. However, in order to reduce the deposition of pollutants on the membrane surface and prolong the cleaning period of the membrane under the common conditions, a circulating pump is required to provide a high membrane surface cross flow velocity, the water flow circulation volume is large, the power cost is high, and shearing force generated by high-speed rotation of the pump can inactivate certain microbial cells, so that the membrane module is in pressure-bearing operation, the module is inconvenient to clean, the material liquid circulation velocity is high, and the power cost is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a sewage purification system and a sewage purification method which can reduce the treatment load of a membrane pool, effectively reduce the cleaning period of a solid-liquid separation membrane and prolong the service life.
The purpose of the invention is realized by the following technical scheme: a sewage purification system comprises an aeration tank and a membrane tank; wherein:
an aeration pipe is arranged in the aeration tank, a solid-liquid separation membrane is arranged in the membrane tank, a reflux pump is arranged outside the membrane tank, a water inlet of the reflux pump is connected with a water outlet of the membrane tank, and a water outlet of the reflux pump is connected with the aeration tank; activated sludge is filled in the aeration tank.
Preferably, a fan is arranged outside the aeration tank, and an air outlet of the fan is connected with an air inlet of the aeration pipe.
Preferably, a plurality of aeration heads are connected in parallel on the aeration pipe.
A method for purifying sewage by a sewage purification system, comprising: the method comprises the following steps:
s1: the sewage enters an aeration tank, and the aeration tank is oxygenated by an aeration pipe which is supplied with air by a fan, so that the activity of the activated sludge is maintained, and organic pollutants in the sewage are biodegraded;
s2: the water flowing out of the aeration tank enters a membrane tank, and a solid-liquid separation membrane in the membrane tank is used for carrying out solid-liquid separation on the water and the activated sludge;
s3: returning the water after the S2 to the aeration tank through a return pump to dilute the sewage concentration in the aeration tank;
s4: and (5) circulating S1-S3 until the water in the membrane pool reaches the first grade A mark, stopping circulating, and discharging the membrane pool.
The invention has the following advantages:
1. the treatment load of the solid-liquid separation membrane can be effectively reduced by circulating clear water into the aeration tank, the cleaning period of the solid-liquid separation membrane is effectively reduced, the service life of the solid-liquid separation membrane is prolonged, and the qualified effluent quality is ensured to reach the standard;
2. the method is suitable for domestic sewage with small water quantity and industrial sewage with similar water quality condition, and has wider application range.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1-a fan; 2-an aerator pipe; 3-an aeration head; 4-an aeration tank; 5-a solid-liquid separation membrane; 6-membrane pool; 7-reflux pump.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in FIG. 1, a sewage purification system comprises an aeration tank 4 and a membrane tank 6; wherein:
an aeration pipe 2 is arranged in the aeration tank 4, a solid-liquid separation membrane 5 is arranged in the membrane tank 6, a reflux pump 7 is arranged outside the membrane tank 6, a water inlet of the reflux pump 7 is connected with a water outlet of the membrane tank 6, and a water outlet of the reflux pump 7 is connected with the aeration tank 4, so that the purpose of diluting the sewage in the aeration tank 4 is achieved; activated sludge is filled in the aeration tank 4, so that organic pollutants in sewage can be effectively decomposed.
Preferably, a fan 1 is arranged outside the aeration tank 4, an air outlet of the fan 1 is connected with an air inlet of the aeration pipe 2, and the fan 1 is used for oxygenating the aeration tank 4 through the aeration pipe 2, so that the activity of the activated sludge is ensured.
Preferably, a plurality of aeration heads 3 are connected in parallel on the aeration pipe 2, and the plurality of aeration heads 3 are uniformly distributed at the bottom of the aeration tank 4, so that the liquid in the aeration tank 4 can uniformly obtain oxygen.
Preferably, the solid-liquid separation membrane 5 is an MBR membrane.
A method for purifying sewage by a sewage purification system, comprising: the method comprises the following steps:
s1: sewage enters an aeration tank 4, the aeration tank 4 is oxygenated by an aeration pipe 2 which is supplied with air by a fan 1, and the activity of activated sludge is kept, so that organic pollutants in the sewage are biodegraded;
s2: the water flowing out of the aeration tank 4 enters a membrane tank 6, and a solid-liquid separation membrane 5 in the membrane tank 6 is used for carrying out solid-liquid separation on the water and the activated sludge;
s3: the water after S2 flows back to the aeration tank 4 through the reflux pump 7 to dilute the sewage concentration in the aeration tank 4;
s4: and (5) circulating S1-S3 until the water in the membrane pool 6 reaches the first grade A mark, stopping circulating, and discharging the water out of the membrane pool 6.
Claims (4)
1. A sewage purification system is characterized in that: comprises an aeration tank (4) and a membrane tank (6); wherein:
an aeration pipe (2) is arranged in the aeration tank (4), a solid-liquid separation membrane (5) is arranged in the membrane tank (6), a reflux pump (7) is arranged outside the membrane tank (6), a water inlet of the reflux pump (7) is connected with a water outlet of the membrane tank (6), and a water outlet of the reflux pump (7) is connected with the aeration tank (4); and activated sludge is filled in the aeration tank (4).
2. The sewage purification system of claim 1, wherein: the aeration tank (4) is externally provided with a fan (1), and the air outlet of the fan (1) is connected with the air inlet of the aeration pipe (2).
3. The sewage purification system of claim 1, wherein: a plurality of aeration heads (3) are connected in parallel on the aeration pipe (2).
4. A method for purifying sewage by a sewage purification system according to any one of claims 1 to 3, characterized in that: the method comprises the following steps:
s1: sewage enters an aeration tank (4), the aeration tank (4) is oxygenated through an aeration pipe (2) which is supplied with air by a fan (1), and the activity of activated sludge is kept, so that organic pollutants in the sewage are biodegraded;
s2: the water flowing out of the aeration tank (4) enters a membrane tank (6), and a solid-liquid separation membrane (5) in the membrane tank (6) is used for carrying out solid-liquid separation on the water and the activated sludge;
s3: the water after S2 flows back to the aeration tank (4) through the reflux pump (7) to dilute the sewage concentration in the aeration tank (4);
s4: and (4) circulating S1-S3 until the water in the membrane pool (6) reaches a first grade A mark, stopping circulating, and discharging the water out of the membrane pool (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011224403.6A CN112174450A (en) | 2020-11-05 | 2020-11-05 | Sewage purification system and purification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011224403.6A CN112174450A (en) | 2020-11-05 | 2020-11-05 | Sewage purification system and purification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112174450A true CN112174450A (en) | 2021-01-05 |
Family
ID=73916494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011224403.6A Pending CN112174450A (en) | 2020-11-05 | 2020-11-05 | Sewage purification system and purification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112174450A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002192182A (en) * | 2000-12-26 | 2002-07-10 | Kubota Corp | Ultrahigh concentration membrane separation activated sludge method |
| CN101172704A (en) * | 2007-09-19 | 2008-05-07 | 刘宏建 | Wastewater film biological treatment technique for pressurization static bed coal gasification technique |
| CN203382557U (en) * | 2013-06-09 | 2014-01-08 | 江苏远兴环保集团有限公司 | Novel submerged membrane bio-reactor device |
| CN103588352A (en) * | 2013-09-03 | 2014-02-19 | 北京工业大学 | Two-stage backflow simultaneous nitrogen and phosphorus removal device and technology for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation of municipal sewage |
| CN209468188U (en) * | 2018-12-17 | 2019-10-08 | 浙江元美环境科技有限公司 | A kind of aerobic-MBR reactor of resistance to high phenol waste water |
-
2020
- 2020-11-05 CN CN202011224403.6A patent/CN112174450A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002192182A (en) * | 2000-12-26 | 2002-07-10 | Kubota Corp | Ultrahigh concentration membrane separation activated sludge method |
| CN101172704A (en) * | 2007-09-19 | 2008-05-07 | 刘宏建 | Wastewater film biological treatment technique for pressurization static bed coal gasification technique |
| CN203382557U (en) * | 2013-06-09 | 2014-01-08 | 江苏远兴环保集团有限公司 | Novel submerged membrane bio-reactor device |
| CN103588352A (en) * | 2013-09-03 | 2014-02-19 | 北京工业大学 | Two-stage backflow simultaneous nitrogen and phosphorus removal device and technology for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation of municipal sewage |
| CN209468188U (en) * | 2018-12-17 | 2019-10-08 | 浙江元美环境科技有限公司 | A kind of aerobic-MBR reactor of resistance to high phenol waste water |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |
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| RJ01 | Rejection of invention patent application after publication |