CN103663861A - Advanced treatment method for grading and recycling industrial park wastewater after biochemical processes - Google Patents
Advanced treatment method for grading and recycling industrial park wastewater after biochemical processes Download PDFInfo
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Abstract
The present invention discloses an advanced treatment method for grading and recycling industrial park wastewater after biochemical processes, which belongs to the technical field of the sewage treatment. The method comprises firstly, entering the industrial park wastewater after biochemical processes into cloth filter for treatment, and respectively entering the filter effluent of cloth filter into an O3 coupling biochar system and an artificial light coupling submerged plants purification pond for treatment in two paths, wherein the O3 coupling biochar system consists of a O3 oxygen pond and a biochar pond, and the outlet of the artificial light coupling submerged plants purification pond is communicated with a clean water pond through a valve; then drawing an appropriate amount of water from the recycling clean water pond to be transferred into a nanofiltration softening device, a softening water tank, a reverse osmosis device, a de-salting water tank, an electric desalting device and an ultrapure water tank, and finally sending the recycling clear pool, the softening tank, the de-salting water tank and the ultrapure water tank to the industrial park water consuming point by pipelines or water carts. A high recycling rate can be achieved, and water treatment costs can be significantly reduced, so that the method is worthy of being popularized.
Description
Technical field
The deep treatment method that the present invention relates to a kind of industrial park biochemical tail water grading recycle, belongs to technical field of sewage.
Background technology
Sewage is after secondary biochemical treatment, although energy qualified discharge, but still contain certain pollutent, because quantity discharged is large, remain the primary pollution source of water environment pollution.To Sewage Plant secondary biochemical tail water carry mark or advanced treatment be the important channel of improving quality of water environment.At present, the combination process that conventional deep treatment method mainly consists of technology such as physico-chemical process, biochemical process, membrane separation processes.
Chinese patent CN1435386 provides a kind of advanced treatment of wastewater reuse technology, system successively through steps such as coagulation air-float, fibre-ball filtration, O3 contacted oxidation, charcoal filtration, multi-medium filtering, accurate filter filtration, sterilizations, realizes deep purification of waste water and reuse by former water.This advanced treatment process has the shortcomings such as investment is large, complicated operation, running cost is higher, serviceability is not strong.
Chinese patent CN101209886 provides a kind of advanced treatment recycling technique of urban sewage that adopts membrane bioreactor and reverse osmosis coupling.Be that to take the secondary effluent of municipal effluent be former water, enter membrane bioreactor MBR system and carry out biochemical pre-treatment, remove BOD, COD, SS, ammonia nitrogen in water, then process through the further advanced desalination of reverse osmosis system, can obtain required reuse water.There is the film shortcomings such as easily dirt is stifled, serviceability is not strong in this technique.
Chinese patent CN102206022A discloses a kind of system materialization bioecology method that is widely used in advanced treatment of wastewater, and sewage to be processed, first by grid, is removed to the bulk foreign material such as larger sandstone, wooden unit, plastics, enters pretreatment pool; In pretreatment pool, carry out sewage and mix adjusting, scientific and reasonable interpolation flocculation agent, is aided with microwave treatment, rapidly and efficiently precipitates flocs unit; Then enter biological treatment tank, carry out ultrasonic synergistic Air Exposure, biological respinse, finally enters and take plant, animal and microorganism as the main Wetlands ecosystems that formed, and carries out ecosystem processing, discharge or reuse.This advanced treatment process can not reach higher water quality, is difficult to be applicable to the middle water reuse of industrial enterprise.
Summary of the invention
For the shortcoming existing in prior art, the technical problem to be solved in the present invention is to provide the deep treatment method of a kind of industrial park biochemical tail water grading recycle, and the method not only can realize higher reclamation rate, and can reduce costs, and promotional value is large.
The technical scheme that the present invention solves its technical problem is:
A deep treatment method for industrial park biochemical tail water grading recycle, is characterized in that comprising following processing step:
(1) industrial park biochemical tail water enters filtering cloth filtering pool processing, and the filtering accuracy of filter cloth is 10um, filters out more than 90% suspended substance, and ss suspended solid can reach below 10mg/L;
(2) filtering cloth filtering pool goes out moisture two-way and enters respectively O
3coupled biological charcoal system and source of artificial light coupling submerged plant treating pond are processed, O
3coupled biological charcoal system is by O
3oxidation pond and charcoal pond form, O
3the outlet of oxidation pond is connected with charcoal pond and source of artificial light coupling submerged plant treating pond respectively by valve; Wherein, annual May and October, June and September, July and August, the filtering cloth filtering pool water outlet by 90% entered source of artificial light coupling submerged plant treating pond by 75% by 65%, and the water outlet of residue filtering cloth filtering pool enters O
3coupled biological charcoal system is processed; O
3coupled biological charcoal system can reach surface water 4 class water quality standards after mixing with the water outlet of source of artificial light coupling submerged plant treating pond, enters reuse clean water basin; Annual January～April, November and December, filtering cloth filtering pool water outlet 100% enters O
3coupled biological charcoal system, O
3the water outlet of coupled biological charcoal system enters source of artificial light coupling submerged plant pond continuation and O again by the valve of opening on connecting pipe
3contact, improves O
3mix with sewage the time contacting, improve treatment effect; The water outlet in source of artificial light coupling submerged plant pond enters charcoal pond again by the valve of opening on connecting pipe; After reaching surface water 4 class water quality standards, the water outlet of processing through charcoal pond enters reuse clean water basin;
(3) according to the consumption of the required softening water of industrial park enterprise, from reuse clean water basin, to extract appropriate water and send into nanofiltration softening installation, water outlet meets domestic hot water boiler water quality standard, and hardness, lower than 0.03mmol/L, enters softening water tank;
(4) according to the consumption of the required de-mineralized water of industrial park enterprise, from softening water tank, to extract appropriate water and send into reverse osmosis unit, water outlet meets low pressure steam boiler water quality standards, enters sweet-water tank;
(5) according to the consumption of industrial park enterprise ultrapure water, from sweet-water tank, to extract appropriate water and send into electric desalination (EDI) device, water outlet can meet enterprise of electronic semi-conductor ultrapure water water quality and high-duty boiler water quality standard, enters ultrapure water tank;
(6) reuse clean water basin, softening water tank, sweet-water tank, ultrapure water tank are delivered to garden water spot with pipeline or water trolley respectively.
Wherein, O
3with the duration of contact of mixing of sewage be 20～60min, ozone concn is 0.5～2mg/L, sewage is 1～3h in the residence time in gac pond.
The source of artificial light of described source of artificial light coupling submerged plant treating pond is the composite LED light source being comprised of red LED light and blue LED light, and the ratio of red light and blue light is (5～10): 1, and submerged plant used is the verticillate submerged plant of narrow leaf.
It is 300～400 nanofiltration membrane that described nanofiltration softening installation is selected molecular weight cut-off, and the rate of recovery is controlled at 75～85%, and 15～25% dense water turns back to reuse clean water basin.
Described reverse osmosis unit is selected rolling low-pressure reverse osmosis membrane, and the rate of recovery of reverse osmosis is controlled at 80～85%, and dense water turns back to softening water tank.
Described electric desalination plant, EDI module is selected rolling or plate and frame, and operation scheme is dense water circulation type, and utmost point water returns to softening water tank.
Method of the present invention can be for the treatment of the advanced treatment of all kinds of Sewage Plant biochemical tail waters, and not only treatment effect is good, can realize higher reclamation rate, and can significantly reduce cost of water treatment, and promotional value is large.
Accompanying drawing explanation
Fig. 1 is the technological process of the deep treatment method of a kind of industrial park of the present invention biochemical tail water grading recycle.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further details.
Embodiment 1:
The advanced treatment of the grading recycle of certain enterprise campus Sewage Plant biochemical tail water, main water quality parameter is pH6.8～8.5, SS is that 40～50mg/L COD is 50～60mg/L, NH
3-N is 8～10mg/L, and TP is 0.2～0.3mg/L.
Adopt method as shown in Figure 1:
(1) industrial park biochemical tail water enters filtering cloth filtering pool processing, and the filtering accuracy of filter cloth is 10um～20um, filters out more than 90% suspended substance, and SS is dropped to below 10mg/L.
(2) filtering cloth filtering pool water outlet enters respectively O by Open valve 1 and valve 2
3coupled biological charcoal system and source of artificial light coupling submerged plant treating pond are processed.Wherein, annual 5 and October by 65%, June and September, July and August were sent filtering cloth filtering pool water outlet into source of artificial light coupling submerged plant treating pond in 90% ratio by 75%, the water outlet of residue filtering cloth filtering pool enters O
3coupled biological charcoal system is processed.O
3coupled biological charcoal system reaches surface water 4 class water quality standards after mixing with the water outlet of source of artificial light coupling submerged plant treating pond, enters clean water basin.
Annual January～April, November and December, filtering cloth filtering pool water outlet all enters O by Open valve 1 and valve-off 2
3oxidation pond, then enter submerged plant pond by Open valve 4 and valve-off 5, then enter charcoal pond by Open valve 6 and valve-off 7, water outlet enters reuse clean water basin after reaching surface water 4 class water quality standards.
The processing parameter that need control when source of artificial light coupling submerged plant treating pond is processed is that hydraulic detention time is 3d, night, light application time was 3h, source of artificial light is the composite LED light source being comprised of red LED light and blue LED light, total power 100w, the ratio of red light and blue light is 10:1, and submerged plant is the verticillate submerged plant hornwort of narrow leaf; At O
3in coupled biological charcoal system, O
3with the duration of contact of mixing of sewage be 30min, ozone concn is 0.5mg/L, sewage is 2h in the residence time in gac pond.
In clean water basin, water removes reuse point 1, can be used as the municipal miscellaneous waters such as pouring, carwash, road surface watering.
(3) according to the consumption of the required softening water of industrial park enterprise, from reuse clean water basin, extract appropriate water and send into nanofiltration softening installation, the nanofiltration membrane of selecting can be NF270, and molecular weight cut-off is 300～400, and the rate of recovery is controlled at 75%, 25% dense water turns back to clean water basin, water outlet meets domestic hot water boiler water quality standard, and hardness, lower than 0.03mmol/L, enters softening water tank, remove reuse point 2, for enterprise, produce required softening water.
(4) according to the consumption of the required de-mineralized water of industrial park enterprise, from softening water tank, extract appropriate water and send into reverse osmosis unit, reverse osmosis membrane is selected rolling low-pressure reverse osmosis membrane, and the rate of recovery of reverse osmosis is controlled at 80%, and dense water turns back to softening water tank.Water outlet meets low pressure steam boiler water quality standards, enters sweet-water tank, removes reuse point 3, for enterprise, produces required de-mineralized water.
(5) according to the consumption of industrial park enterprise ultrapure water, from sweet-water tank, extract appropriate water and send into electric desalination (EDI) device, EDI module is selected rolling or plate and frame, and operation scheme is dense water circulation type, and utmost point water returns to softening water tank.Water outlet can meet enterprise of electronic semi-conductor ultrapure water water quality and high-duty boiler water quality standard, enters ultrapure water tank, removes reuse point 4, for enterprise, produces required ultrapure water.
(6) clean water basin, softening water tank, sweet-water tank, ultrapure water tank are delivered to each reuse water spot of garden with pipeline or water trolley respectively.
Embodiment 2:
The advanced treatment of the grading recycle of certain printing and dyeing enterprise garden Sewage Plant biochemical tail water, main water quality parameter is pH6.8～8.5,30～40 times of colourities, SS is 50～70mg/L, COD is 70～80mg/L, NH
3-N is 10～15mg/L, and TP is 0.3～0.5mg/L.
Adopt method as shown in Figure 1:
(1) industrial park biochemical tail water enters filtering cloth filtering pool processing, and the filtering accuracy of filter cloth is 10um～20um, filters out more than 90% suspended substance, and ss suspended solid can reach below 10mg/L.
(2) filtering cloth filtering pool water outlet enters respectively O by Open valve 1 and valve 2
3coupled biological charcoal system and source of artificial light coupling submerged plant treating pond are processed.Wherein, annual 5 and October by 65%, June and September, July and August were sent filtering cloth filtering pool water outlet into source of artificial light coupling submerged plant treating pond in 90% ratio by 75%, the water outlet of residue filtering cloth filtering pool enters O
3coupled biological charcoal system is processed.O
3coupled biological charcoal system reaches surface water 4 class water quality standards after mixing with the water outlet of source of artificial light coupling submerged plant treating pond, enters clean water basin.
Annual January～April, November and December, filtering cloth filtering pool water outlet all enters O by Open valve 1 and valve-off 2
3oxidation pond, then enter submerged plant pond by Open valve 4 and valve-off 5, then enter charcoal pond by Open valve 6 and valve-off 7, water outlet enters reuse clean water basin after reaching surface water 4 class water quality standards.
The processing parameter that need control when source of artificial light coupling submerged plant treating pond is processed is that hydraulic detention time is 8d, night, light application time was 6h, source of artificial light is the composite LED light source being comprised of red LED light and blue LED light, total power 100w, the ratio of red light and blue light is 5:1, and submerged plant is the verticillate submerged plant hornwort of narrow leaf; At O
3in coupled biological charcoal system, O
3with the duration of contact of mixing of sewage be 60min, ozone concn is 2mg/L, sewage is 3h in the residence time in gac pond.
In clean water basin, water removes reuse point 1, can be used as the municipal miscellaneous waters such as pouring, carwash, road surface watering.
(3) according to the consumption of the required softening water of industrial park enterprise, from reuse clean water basin, extract appropriate water and send into nanofiltration softening installation, nanofiltration membrane can be selected NF270, and molecular weight cut-off is 300～400, and the rate of recovery is controlled at 85%, 15% dense water and turns back to clean water basin; Water outlet meets domestic hot water boiler water quality standard, and hardness, lower than 0.03mmol/L, enters softening water tank, removes reuse point 2, for enterprise, produces required softening water.
(4) according to the consumption of the required de-mineralized water of industrial park enterprise, from softening water tank, extract appropriate water and send into reverse osmosis unit, reverse osmosis membrane is selected rolling low-pressure reverse osmosis membrane, and the rate of recovery of reverse osmosis is controlled at 85%, and dense water turns back to softening water tank.Water outlet meets low pressure steam boiler water quality standards, enters sweet-water tank, removes reuse point 3, for enterprise, produces required de-mineralized water.
(5) according to the consumption of industrial park enterprise ultrapure water, from sweet-water tank, extract appropriate water and send into electric desalination (EDI) device, EDI module is selected rolling or plate and frame, and operation scheme is dense water circulation type, and utmost point water returns to softening water tank.Water outlet can meet enterprise of electronic semi-conductor ultrapure water water quality and high-duty boiler water quality standard, enters ultrapure water tank, removes reuse point 4, for enterprise, produces required ultrapure water.
(6) clean water basin, softening water tank, sweet-water tank, ultrapure water tank are delivered to each reuse water spot of garden with pipeline or water trolley respectively.
Claims (6)
- The deep treatment method of 1.Yi Zhong industrial park biochemical tail water grading recycle, is characterized in that comprising following processing step:(1) industrial park biochemical tail water enters filtering cloth filtering pool processing, and the filtering accuracy of filter cloth is 10um, filters out more than 90% suspended substance, and ss suspended solid can reach below 10mg/L;(2) filtering cloth filtering pool goes out moisture two-way and enters respectively O 3coupled biological charcoal system and source of artificial light coupling submerged plant treating pond are processed, O 3coupled biological charcoal system is by O 3oxidation pond and charcoal pond form, O 3the outlet of oxidation pond is connected with charcoal pond and source of artificial light coupling submerged plant treating pond respectively by valve; Wherein, annual May and October, June and September, July and August, the filtering cloth filtering pool water outlet by 90% entered source of artificial light coupling submerged plant treating pond by 75% by 65%, and the water outlet of residue filtering cloth filtering pool enters O 3coupled biological charcoal system is processed; O 3coupled biological charcoal system can reach surface water 4 class water quality standards after mixing with the water outlet of source of artificial light coupling submerged plant treating pond, enters reuse clean water basin; Annual January～April, November and December, filtering cloth filtering pool water outlet 100% enters O 3coupled biological charcoal system, O 3the water outlet of coupled biological charcoal system enters source of artificial light coupling submerged plant pond continuation and O again by the valve of opening on connecting pipe 3contact, improves O 3mix with sewage the time contacting, improve treatment effect; The water outlet in source of artificial light coupling submerged plant pond enters charcoal pond again by the valve of opening on connecting pipe; After reaching surface water 4 class water quality standards, the water outlet of processing through charcoal pond enters reuse clean water basin;(3) according to the consumption of the required softening water of industrial park enterprise, from reuse clean water basin, to extract appropriate water and send into nanofiltration softening installation, water outlet meets domestic hot water boiler water quality standard, and hardness, lower than 0.03mmol/L, enters softening water tank;(4) according to the consumption of the required de-mineralized water of industrial park enterprise, from softening water tank, to extract appropriate water and send into reverse osmosis unit, water outlet meets low pressure steam boiler water quality standards, enters sweet-water tank;(5) according to the consumption of industrial park enterprise ultrapure water, from sweet-water tank, to extract appropriate water and send into electric desalination plant, water outlet can meet enterprise of electronic semi-conductor ultrapure water water quality and high-duty boiler water quality standard, enters ultrapure water tank;(6) reuse clean water basin, softening water tank, sweet-water tank and ultrapure water tank are delivered to garden water spot with pipeline or water trolley respectively.
- 2. the deep treatment method of a kind of industrial park according to claim 1 biochemical tail water grading recycle, is characterized in that, in described step (2), and O 3with the duration of contact of mixing of sewage be 20～60min, ozone concn is 0.5～2mg/L, sewage is 1～3h in the residence time in charcoal pond.
- 3. the deep treatment method of a kind of industrial park according to claim 1 biochemical tail water grading recycle, it is characterized in that, the source of artificial light of described source of artificial light coupling submerged plant treating pond is the composite LED light source being comprised of red LED light and blue LED light, the ratio of red light and blue light is (5～10): 1, and submerged plant used is the verticillate submerged plant of narrow leaf.
- 4. the deep treatment method of a kind of industrial park according to claim 1 biochemical tail water grading recycle, it is characterized in that, in described step (3), it is 300～400 nanofiltration membrane that nanofiltration softening installation is selected molecular weight cut-off, the rate of recovery is controlled at 75～85%, and 15～25% dense water turns back to reuse clean water basin.
- 5. the deep treatment method of a kind of industrial park according to claim 1 biochemical tail water grading recycle, it is characterized in that, in described step (4), reverse osmosis unit is selected rolling low-pressure reverse osmosis membrane, the rate of recovery of reverse osmosis is controlled at 80～85%, and dense water turns back to softening water tank.
- 6. the deep treatment method of a kind of industrial park according to claim 1 biochemical tail water grading recycle, it is characterized in that, in described step (5), electric desalination plant module is selected rolling or plate and frame, operation scheme is dense water circulation type, and utmost point water returns to softening water tank.
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Cited By (3)
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| CN103922537A (en) * | 2014-04-04 | 2014-07-16 | 西安西热水务环保有限公司 | System for recycling wastewater from circulating cooling water by adopting membrane process |
| CN105399287A (en) * | 2015-12-30 | 2016-03-16 | 北京赛科康仑环保科技有限公司 | Hardly-degradable organic wastewater comprehensive treatment and zero discharge treatment method and system thereof |
| CN112591987A (en) * | 2020-11-24 | 2021-04-02 | 江苏拓孚工程设计研究有限公司 | Intelligent combined pool for reclaimed water recycling and reclaimed water recycling method |
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