CN101597122A - Deep treatment and reuse method for petroleum and petrochemical wastewater - Google Patents
Deep treatment and reuse method for petroleum and petrochemical wastewater Download PDFInfo
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- CN101597122A CN101597122A CNA2009100338801A CN200910033880A CN101597122A CN 101597122 A CN101597122 A CN 101597122A CN A2009100338801 A CNA2009100338801 A CN A2009100338801A CN 200910033880 A CN200910033880 A CN 200910033880A CN 101597122 A CN101597122 A CN 101597122A
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- petroleum
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- wastewater
- petrochemical wastewater
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- 238000011282 treatment Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000002351 wastewater Substances 0.000 title claims abstract description 29
- 239000003208 petroleum Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 14
- 238000004064 recycling Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 235000015097 nutrients Nutrition 0.000 claims abstract description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 229920001542 oligosaccharide Polymers 0.000 claims description 3
- 150000002482 oligosaccharides Chemical class 0.000 claims description 3
- 239000010865 sewage Substances 0.000 abstract description 26
- 239000012528 membrane Substances 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 6
- 239000010802 sludge Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 2
- 244000005700 microbiome Species 0.000 abstract 1
- 239000005416 organic matter Substances 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 230000001580 bacterial effect Effects 0.000 description 17
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 235000003784 poor nutrition Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
An advanced treatment and recycling method of petroleum and petrochemical wastewater, which relates to the technical field of water treatment, in particular to the technical field of advanced treatment and recycling of refining wastewater and petroleum exploitation wastewater. The petroleum and petrochemical wastewater is sequentially subjected to anaerobic biological reaction and aerobic treatment by a stirrer, and finally the sludge-containing wastewater after the aerobic treatment is filtered by an ultrafiltration membrane to obtain the reuse water. The invention can shorten the culture period in the biochemical starting stage of sewage, improve the impact resistance of a biochemical system in the operation process, adapt to the sewage which is difficult to be biochemically degraded and has relatively poor nutrient substances, strengthen the activity of microorganisms through a biological regulator, maintain the population stability of micro-ecological flora, ensure the long-term effective stable operation of the whole system, and ensure that the quality of the treated reuse water has small change and the organic matter has low reserve.
Description
Technical field
The present invention relates to water-treatment technology field, particularly the advanced treatment and reclamation technical field of refinery waste water, petroleum production wastewater.
Background technology
Present stage petroleum and petrochemical industry sewage disposal is to discharge after the syllogic processing of process " oil removal-air supporting-biochemistry " reaches emission standard mostly, also there is minority to handle the back reuse again, such as adopting with two embrane methods or ion exchange method is the physical treatment method of core, but be subjected to that organic substance in the sewage is still higher, change of water quality big and the influence of factors such as stable equipment operation is poor, attended operation difficulty, the reuse scale is generally less, and while quality of reused water, the water yield can not be guaranteed, system's operation and maintenance cost height.
Summary of the invention
The objective of the invention is to provides a kind of advanced treatment and reclamation method that back backwater change of water quality is little, the organism amount retained is low of handling at petroleum and petrochemical industry waste water.
The present invention is the petroleum and petrochemical industry waste water anaerobe reaction through having agitator, aerobic treatment successively, at last with the band dirt water after the aerobic treatment through ultrafiltration membrance filter, what leach is reuse water.
Handling principle of the present invention is:
The anaerobe reaction process: the micro-ecological bacterial group that this process is used, obtain adapting to the micro-ecological bacterial group mud of the petroleum and petrochemical industry waste water of the barren and difficult degradation of nutriment after cultivating by anaerobism, and make sewage generation acidication, improve the biodegradability of sewage.
The aerobic treatment process: this process makes the micro-ecological bacterial group obtain domestication and increment by the aerobic cultivation to the micro-ecological bacterial group at short notice, forms sophisticated micro-ecological bacterial all living creaturesization mud, can handle well through the precipitated outlet water after the anaerobic process processing.
The ultrafiltration membrance filter process: the tubular ultra-filtration membrane of use external placed type filters the band dirt water of aerobic processes, band dirt water by the power set pump delivery in tubular ultra-filtration membrane, and necessary pressure is provided, hold back flora and the portion C OD that is with in the dirt water by tubular ultra-filtration membrane; The concentrate recirculation that is retained down is in aerobic processes, and the sewage that sees through tubular ultra-filtration membrane reaches recirculated cooling water reuse requirement, but direct reuse is back to boiler water supply in the recirculated water process or after passing through osmosis filtration again.
It is the method for core that the present invention adopts with the biochemical degradation, by using micro-ecological bacterial group and technological process efficiently reliably, the culture cycle of shortening unloading phase that sewage is biochemical, improve the impact resistance of biochemical system in operational process, and can adapt to and be difficult to the poor relatively sewage of biochemical degradation and nutritive substance, and the activity by the biological regulator enhancement microbiological, keep the micro-ecological bacterial group population stable, guarantee total system steady running long-term effectively.
The present invention has following outstanding feature compared with prior art:
1, adopt the present invention can make the startup of sewage biochemical treatment faster, the micro-ecological bacterial group normally moves from rendering to biochemistry pool, and culture cycle had only for 2 weeks, is significantly shorter than 2～3 months of the biochemical culture cycle of conventional mud.
2, anti-soil water change of water quality impact capacity is strong, adapts to concentration of wastewater and changes more than 300% significantly.
Therefore 3, produce excess sludge hardly, do not have excess sludge and handle problems, and excess sludge 0.4～0.6kg is produced in the COD degraded of conventional biochemical sewage disposal 1kg.
4, be suitable for poor nutrition difficulty, degradation of sewage, micro-ecological bacterial group vitality is strong, is applicable to that B/C is low to the sewage disposal below 0.1.
5, the ultra-filtration membrane process operation is stable, because the special arrangements of micro-ecological bacterial group and technological process, the ultra-filtration membrane resistance to crocking is strong, and equipment does not clean the cycle of operation and reaches more than 30 days the running maintenance intuitive and convenient of process.
6, after treatment in the reuse water COD content be no more than 500mg/L, the best can reach 100～200mg/L, oil-containing is no more than 20mg/L, the best can reach 1～5mg/L.
7, the producing water ratio of reverse osmosis is not less than 50%.
The present invention designs for the petroleum and petrochemical industry waste water of handling bio-refractory specially, particularly through treating reuse waste water after the preliminary biochemical treatment, its B/C (ratio of biological oxygen demand (BOD) COD and chemical oxygen demand BOD) is usually less than 0.2, and is most of about 0.1.Here " B/C " reflected the bio-degradable performance of waste water, among the COD of expression sewage how many ratio bio-degradables are arranged, low more expression is difficult to biochemical degradation more, and the B/C that advances factory's sewage of common municipal wastewater treatment plant is about 0.4, and the B/C of petroleum and petrochemical industry waste water is usually less than 0.2.
In order to reach better treatment effect, anaerobe reaction water outlet COD (chemical oxygen demand (COD)) is 100～200mg/L among the present invention, is preferably 120～160mg/L.
The water outlet COD of ultrafiltration membrance filter is 50mg/L.
In order to reduce blowdown, the present invention also refluxes the mud after the aerobic treatment and carries out the anaerobe reaction.
In addition, the elder generation of the mud after the aerobic treatment after biological reinforced processing is carried out in the biological regulator mixing, is refluxed and carries out the anaerobe reaction.Micro-ecological bacterial group in the Aerobic Pond is back in the process of anaerobic pond and uses biological regulator, add necessary nutriment simultaneously, cultivation by intensifying device, make the micro-ecological bacterial group the process that is back to anaerobic pond from Aerobic Pond, obtain orthoselection and directional proliferation, keep the pure and active of flora.
Biological regulator of the present invention comprise in inorganic nutrients thing, oligosaccharides class, the tethelin at least any one.
In addition, the time of carrying out described biological reinforced processing is preferably 1～3 hour, and the better treatment time is 1～2 hour.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
1) water outlet after the preliminary treatment of refinery sewage (B/C＜0.2) enters into equalizing tank 1.
2) sewage is transported in the anaerobic pond 2 by water pump by equalizing tank 1, and the whipping appts that utilizes anaerobic pond makes it reach complete admixture substantially entering the sewage of anaerobic pond and the micro-ecological bacterial group short mix in the anaerobic pond; Through anaerobic treatment, the material of macromole difficult degradation becomes the biochemical small-molecule substance of easy degraded in the sewage, improves the biodegradability of sewage.Anaerobe reaction water outlet COD is 100～200mg/L, is preferably 120～160mg/L.
3) sewage is by the back simple precipitation of anaerobic pond, enter into Aerobic Pond 3 and carry out the aerobic biochemical processing, Aerobic Pond 3 bottoms are furnished with aerating apparatus, use air pump the mud in the Aerobic Pond to be carried out aeration by the aerating apparatus of bottom, pond, guarantee the content of oxygen in the Aerobic Pond on the one hand, also utilize the stirring action of aeration to make sewage and micro-ecological bacterial group thorough mixing in the Aerobic Pond that enters in the Aerobic Pond and the suspension that keeps mud on the one hand, aerobic micro-ecological bacterial group energy is handled well to the sewage that enters Aerobic Pond.
4) be drawn in the external placed type ultra-filtration membrane process 4 by the sewage of pump handle through Aerobic Pond 3 biochemical treatments, and for it provides necessary pressure, it is filtered the sewage that contains flora, hold back flora and portion C OD in the sewage, the dense water that contains mud that is retained down is back in the Aerobic Pond 3 again, and the water outlet that does not contain flora reaches recirculated water reuse requirement.The water outlet COD of ultrafiltration membrance filter is 50mg/L.
5) flora in the Aerobic Pond 3 is back to anaerobic pond 2 by sludge reflux pump, and biological reinforced culture apparatus 5 is set in reflux course, and the micro-ecological bacterial group is carried out hot housing; Replenish biological regulator (in inorganic nutrients thing, oligosaccharides class, the tethelin at least any one) simultaneously, make effective microbe population in the returned sluge obtain directed increment, assorted bacterium is inhibited, and strengthens micro-ecological bacterial group's stable and biochemical treatment effect.The time of biological reinforced processing is 1～3 hour, is generally 1～2 hour.
Claims (10)
1, a kind of method for advanced treatment and recycling of petroleum and petrochemical wastewater is characterized in that the petroleum and petrochemical industry waste water anaerobe reaction through having agitator, aerobic treatment successively, at last with the band dirt water after the aerobic treatment through ultrafiltration membrance filter, what leach is reuse water.
2,, it is characterized in that described petroleum and petrochemical industry waste water B/C＜0.2 according to the described method for advanced treatment and recycling of petroleum and petrochemical wastewater of claim 1.
3,, it is characterized in that anaerobe reaction water outlet COD is 100～200mg/L according to the described method for advanced treatment and recycling of petroleum and petrochemical wastewater of claim 1.
4,, it is characterized in that anaerobe reaction water outlet COD is 120～160mg/L according to the described method for advanced treatment and recycling of petroleum and petrochemical wastewater of claim 3.
5, according to the described method for advanced treatment and recycling of petroleum and petrochemical wastewater of claim 1, the water outlet COD that it is characterized in that ultrafiltration membrance filter is 50mg/L.
6,, it is characterized in that the anaerobe reaction is carried out in the backflow of the mud after the aerobic treatment according to the described method for advanced treatment and recycling of petroleum and petrochemical wastewater of claim 1.
7,, it is characterized in that the elder generation of the mud after the aerobic treatment after biological reinforced processing is carried out in the biological regulator mixing, refluxing again and carrying out the anaerobe reaction according to the described method for advanced treatment and recycling of petroleum and petrochemical wastewater of claim 6.
8, according to the described method for advanced treatment and recycling of petroleum and petrochemical wastewater of claim 7, it is characterized in that described biological regulator comprise in inorganic nutrients thing, oligosaccharides class, the tethelin at least any one.
9,, it is characterized in that the time that mud after the described aerobic treatment carries out described biological reinforced processing is 1～3 hour according to claim 7 or 8 described method for advanced treatment and recycling of petroleum and petrochemical wastewater.
10,, it is characterized in that the time that mud after the described aerobic treatment carries out described biological reinforced processing is 1～2 hour according to the described method for advanced treatment and recycling of petroleum and petrochemical wastewater of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100338801A CN101597122A (en) | 2009-06-01 | 2009-06-01 | Deep treatment and reuse method for petroleum and petrochemical wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100338801A CN101597122A (en) | 2009-06-01 | 2009-06-01 | Deep treatment and reuse method for petroleum and petrochemical wastewater |
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| Publication Number | Publication Date |
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| CN101597122A true CN101597122A (en) | 2009-12-09 |
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| CNA2009100338801A Pending CN101597122A (en) | 2009-06-01 | 2009-06-01 | Deep treatment and reuse method for petroleum and petrochemical wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803761A (en) * | 2014-02-27 | 2014-05-21 | 常州大学 | Skid-mounted oil production wastewater treatment apparatus |
| CN104926025A (en) * | 2015-05-26 | 2015-09-23 | 成都高普石油工程技术有限公司 | Treatment technique of chemical wastewater in petroleum refining process |
-
2009
- 2009-06-01 CN CNA2009100338801A patent/CN101597122A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803761A (en) * | 2014-02-27 | 2014-05-21 | 常州大学 | Skid-mounted oil production wastewater treatment apparatus |
| CN104926025A (en) * | 2015-05-26 | 2015-09-23 | 成都高普石油工程技术有限公司 | Treatment technique of chemical wastewater in petroleum refining process |
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Open date: 20091209 |