CN101723539A - Method for treating or recycling waste water with high salt content and applications - Google Patents
Method for treating or recycling waste water with high salt content and applications Download PDFInfo
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- CN101723539A CN101723539A CN200810171744A CN200810171744A CN101723539A CN 101723539 A CN101723539 A CN 101723539A CN 200810171744 A CN200810171744 A CN 200810171744A CN 200810171744 A CN200810171744 A CN 200810171744A CN 101723539 A CN101723539 A CN 101723539A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention provides a method for treating or recycling waste water with a high salt content and applications. The method adopts combination processes of pretreatment, a high-efficiency aeration biological filter and depth treatment; and the detail process is shown in the description. The method of invention has the advantages of rapid degradation speed of the high-efficiency aeration biological filter to the pollutants in waste water, high treatment efficiency, good salt resistance, strong anti-impact capacity, stable operation and less sludge generation amount, and being beneficial for enrichment of halotolerant bacteria; the high-efficiency aeration biological filter is taken as a pretreatment process of the membrane treatment, which can effectively prevent membrane surface from scaling, prevent the membrane from being polluted and plugged by colloidal substances, suspended solid grains, organic matters and microorganisms, prolongs reverse purging period, increases the service life of the membrane, keeps stable water generation amount of a membrane system, thus lowering the operation cost. The invention is not only suitable for standard discharge or recycling of concentrated solution before the membrane separation in a membrane separation process, bus also suitable for treatment and recycling of waste water with a high salt content, such as oil extraction waste water and the like, and transformation and upgrading of the existing engineering.
Description
Technical field
The present invention relates to wastewater treatment and reuse field, more particularly, relate to a kind of high slat-containing wastewater processing or recycling method and purposes, the qualified discharge or the Treatment for Reuse that comprise the preceding concentrated solution of membrane separation process film in the engineering of water treatment such as life or municipal wastewater, and wastewater treatment and renovation that oil, petrochemical industry, Coal Chemical Industry and pharmaceutical industry etc. produced and existing engineered upgrading etc., also be applicable to the processing and the reuse of similar high slat-containing wastewater.
Background technology
Along with the widespread use of membrane technology on water treatment industry, concentrating the processing of waste water before the film of its generation and disposing becomes a new problem day by day.Membrane sepn belongs to physical treatment technology, and it only is separated by thing and realizes that water quality changes, and can not fundamentally subdue water pollutant, remove in the concentrated solution before the film and contain organic material pollution, if the pollution of inorganic salts most serious of all mishandling, can produce serious secondary pollution.Aspect the inorganic salt removal, desalting technology commonly used at present mainly contains methods such as electrodialysis, electro-adsorption, reverse osmosis and ion-exchange, but in the treating processes of this type of technology, each equipment is strict to the organic content of water inlet, surpassing certain density organic substance easily causes equipment to stop up, make fluctuation of service, clean frequently, cause the increase of working cost.Therefore, use this type of technology to carry out must carrying out pre-treatment to organism wherein before the desalination, the organic substance that guarantees the desalter water inlet is in the finite concentration scope, to increase the work-ing life of desalter, prolong flushing cycle, the equipment that prevents stops up, and increases the rate of recovery of water.
At present mainly contain two kinds of physics method and biological processes about pretreated method.The physics pretreatment process mainly comprises coagulating sedimentation (or filtration) method, ultrafiltration and combined method thereof.Coagulating sedimentation (or filtration) method mainly is by add chemical agent in water, utilize the compression of colloid electrostatic double layer, absorption-charge neutrality, adsorption bridging and precipitating thing net series reaction such as to catch, hydrolysate makes fine dispersion particle and the colloidalmaterial in the water take off steady cohesion, form flocs unit, by suspended substance and the colloid in precipitation or the filter method removal water.Although coagulating sedimentation (or filtration) method has removal effect preferably to suspended substance in the water and colloidalmaterial, but to solubilised state, low molecule organic matter removal effect and not obvious wherein, cause and also contain large amount of organic in the water body, and need in the operational process to add a large amount of medicaments, cause that working cost increases, sludge quantity increases.
Ultrafiltration is a kind of membrane separation technique between sodium filter and micro-filtration.The molecular range of holding back of film is about 500-500000 dalton, and the approximation of respective aperture size is about
The ultra-filtration and separation process is based on sieving mechanism.Generally, the serial screen cloth that can regard the ultra-filtration membrane of PSPP as different apertures.Under (0.1-0.7Mpa) under certain pressure, it only allows solvent and sees through less than the solute of membrane pore size, and the suspended substance in the prevention water, particulate, colloid, larger molecular organics and bacterium etc. pass through greater than the solute of membrane pore size, with separation, purification, classification and the spissated process of finishing solution.In reverse osmosis desalination technology, ultrafiltration is as the pre-treating technology of reverse osmosis process, to guarantee the steady running of reverse osmosis unit.Ultra-filtration equipment is strict to pre-treatment, calcium class material in the water, silicate are easy to be deposited on face, it is stifled that colloidalmaterial, suspended solids, organic substance and microorganism are made film forming dirt easily, therefore, the pretreated quality of front end directly influences the rate of recovery of stable, cleaning frequency, work-ing life, working cost and the water of ultra-filtration equipment.Coagulating sedimentation methods such as (or filtrations) is because its treatment effect is relatively poor, working cost is high and produce a large amount of mud, and it more and more is not suitable as the pretreatment unit of ultrafiltration technology, and it is imperative to seek new pretreatment technology.
The waste water microorganism treatment is the effective wastewater processing technology of a kind of maturation, but traditional bioremediation is difficult to be fit to the processing of similar high salinity waste waters such as the preceding concentrated solution of film, oil extraction waste water.Utilize microbiological treatment waste water, effective degrading organic contaminant in wastewater, its processing cost is low, adaptability strong and operation is comparatively stable, is widely used in the second-stage treatment of municipal effluent and trade effluent at present.When utilizing traditional activated sludge process that high slat-containing wastewater is handled, because saltiness height in the waste water causes active sludge processing system sludge bulking, water outlet SS higher easily, its treatment effect is relatively poor, moves very unstable.Common biomembrance process treatment process, as biological filter, contact oxidation method etc., although be greatly improved than the anti impulsion load ability of activated sludge process, when handling high slat-containing wastewater, effect is unsatisfactory.The wetland treatment technology that grew up in recent years have characteristics such as simple to operate, that working cost is low, but floor space is big, and when handling high slat-containing wastewater, causes the soil salinization behind the long-play easily.Therefore, handling aspect the high slat-containing wastewater, still do not have a kind of reliable treatment technology at present, it is imperative to seek new bioremediation.
(Biological Aerated Filter BAF) is a kind of novel sewage disposal technology that grows up the America and Europe end of the eighties to biological aerated filter.Its unique material filling type design, used for reference the advantage of biological filter and biological contact oxidation process, combine various wastewater treatment process such as filtration, absorption and biological metabolism, make it have advantages such as hydraulic load height, strong shock resistance, sludge yield are few, no sludge bulking.Biological aerated filter is mainly used in the advanced treatment of waste water, is adapted to handle low organic loading waste water, the wastewater treatment requirement that different filler size is corresponding different, and good prospects for application is being arranged in conjunction with the high-effective microorganism technical elements.
Adopt the pretreatment technology of high efficient aeration biological filter as film processing system, because it has salt tolerance and anti impulsion load ability preferably, it is with the film processing system associated treatment high slat-containing wastewater of rear end, can guarantee that Waste Water Treatment is efficient, in the steady running, effectively reduce investment and working cost.Waste water is through after the biochemical treatment, materials such as COD wherein, ammonia nitrogen, oils and SS significantly reduce, water outlet after the biochemical treatment is through suitably entering the rear end film processing system after the pre-treatment, can prevent effectively that face fouling and colloidalmaterial, suspended solids, organic substance and microorganism are stifled to the dirt of film, prolong the recoil cycle, increase the work-ing life of film, keep the stable water production rate of film processing system, and reduce and handle working cost.
When containing the not biodegradable organism of higher concentration in the higher or waste water, can behind the HABF biological treatment, put one section ozone-biological activated carbon (O by tail when the standard of efflux wastewater
3/ BAC) technology, utilize ozone equipment optionally biomacromolecule, colloid etc. to be resolved into the solvability small molecules, increase biodegradable property of wastewater, the adsorption, microorganism that utilize gac in the biological activated carbon then are to the organism in the organic Decomposition degrading waste water, and gac is regenerated to organic Degradation by microorganism.Ozone-BAC process not only can effectively be removed dissolved organic matter in the waste water, improve effluent quality, guaranteed discharged wastewater met the national standard, and improved the loading capacity of biological activated carbon, prolong the work-ing life of gac, the dirt that has reduced the rear end reverse osmosis membrane simultaneously is stifled.
Summary of the invention
The objective of the invention is to fill up the vacancy of domestic and international similar high slat-containing wastewater treatment technology at present, a kind of novel high slat-containing wastewater processing or the combination process of reuse are provided.
The object of the invention can realize by following measure: adopt " pre-treatment+high efficient aeration biological filter+combination process for advanced treatment " (hereinafter to be referred as the PID combination process) to handle high slat-containing wastewater.After high slat-containing wastewater process oil removal adjusting, precipitation or the air supporting, most suspended substances SS or petroleum substance in this removal waste water, prevent that SS in the waste water or oils from stopping up the filtrate among the HABF, to guarantee the steady running of follow-up HABF technology, pretreated water outlet enters HABF biological treatment unit, most COD, ammonia nitrogen or petroleum substance in this removal waste water, its water outlet can directly efflux or reuse after appropriate depth is handled, and HABF biological treatment water outlet can be by reuse after the technology desalinations such as reverse osmosis.
Wherein:
In the HABF section, adopt the high efficient aeration biological filter can remove most COD in the waste water, ammonia nitrogen or solubilised state petroleum substance, its water outlet can directly efflux or reuse after advanced treatment, the HABF dissolved oxygen is 3-5mg/l, for example, saltiness less than 5% condition under, it is to COD, BOD in the oil extraction waste water
5, TOC, petroleum-type, SS and hydrogen sulfide average removal rate reach 85.6%, 90.6%, 74.4%, 90.5%, 91.6% and 100%.
When containing the not biodegradable organism of higher concentration in the higher or waste water when the standard of efflux wastewater, can behind the HABF biological treatment, put one section ozone-BAC process by tail, not only improved effluent quality, guarantee discharged wastewater met the national standard, and it is stifled to have reduced the dirt of rear end reverse osmosis membrane.
Used a kind of efficient suspension macropore carrier among the HABF, this carrier is the modification sponge, adopts net bubble method to generate, and main material is a urethane; Wherein institute's microbe inoculation is an engineering bacteria, and the original strain of engineering flora is by the BIONETIX company (network address: www.bionetix-international.ca) provide of the U.S..
The HABF biological treatment can be realized efficiently coupling with wastewater recycling treatment process (as reverse osmosis desalination), the pretreatment technology that is fit to membrane technique in the waste water recycling processing, repeatedly concentrate by multistage, the preceding concentrated solution saltiness of film that enters the HABF biological treatment can reach about 2%, usually the cycles of concentration of municipal administration or sanitary wastewater can reach 15-25 doubly, realize the recycle of water resources effectively, a small amount of high slat-containing wastewater can be realized enterprise's sewage " zero release " through after the evaporation concentration before the film.
This combination process not only is applicable to the qualified discharge or the Treatment for Reuse of the preceding condensed water of membrane separation process film in the engineering of water treatment such as life or municipal wastewater, and be applicable to the high slat-containing wastewater processing reuse that oil, petrochemical industry, Coal Chemical Industry and pharmaceutical industry etc. produce and have engineered upgrading etc. now, also be applicable to the processing and the reuse of similar high slat-containing wastewater simultaneously.
Compare with traditional technology, advantage of the present invention is: the HABF biological treatment is fast to contaminant degradation speed in the waste water, good salt tolerance also helps the breeding of salt tolerant bacteria growing, strong shock resistance, the processing efficiency height, system is stable and the mud generation is few, the HABF biological treatment is as the pretreatment technology of film processing system, can effectively prevent face fouling and colloidalmaterial and suspended solids, organic substance and microorganism are stifled to the dirt of film, prolong the recoil cycle, increase the work-ing life of film, keep the stable water production rate of film processing system, and reduce and handle working cost; And, the HABF biological treatment can be realized efficiently coupling with wastewater recycling treatment process (as reverse osmosis desalination), be particularly suitable for waste water recycling handle in the subduing and qualified discharge of COD, ammonia nitrogen in the high saliferous concentrated solution before the pretreatment technology of membrane technique and the film, realize recycle and enterprise's sewage " zero release " of water resources, reach the purpose of energy-saving and emission-reduction.
Description of drawings
Fig. 1: process flow sheet of the present invention
Embodiment
Enumerate 3 embodiment below, in conjunction with the accompanying drawings, the present invention is further specified, but the present invention is not only limited to this 3 embodiment.
Embodiment 1
Certain large-scale metallurgical enterprise day discharging saline sewage amount 500m of the north
3/ h, this saline sewage is a preceding condensed water of film of overlapping first-stage reverse osmosis film in the two-pass reverse osmosis film device in the enterprise, waste water before concentrating is mainly on-site through the comprehensive wastewater behind the sedimentation and filtration, cycles of concentration is 3-4 times, enterprise intends concentrated solution is handled at present, efflux the COD amount to subdue enterprise, reach the reduction of discharging index request of country, and realize the resource utilization of waste water enterprise.Employing is with " HABF+O
3/ BAC+ ultrafiltration+reverse osmosis " for carrying out lab scale at the scene, main process tests; and the experiment flooding velocity is 40L/h; the effective volume of HABF retort is 240L; divide 5 grades of series operations; hydraulic detention time is 6h; the carrier loadings is 60% (efficient carrier stacking volume is 144L), the HABF water outlet enters the biological activated carbon (BAC) of rear end behind the first-level buffer jar, the useful volume of BAC is 25L, hydraulic detention time is 40min, feed ozone in the first-level buffer jar, the ozone concn that adds is suitably adjusted according to the HABF effluent quality, and microbe inoculation is engineering bacteria (BCP35M) in HABF and the BAC jar.The experiment water inlet is the preceding concentrated solution of first-stage reverse osmosis film, and intaking is COD, BOD
5, TOC, ammonia nitrogen, chlorion and total salt quantity mean concns be at 96.7mg/L, 36.4mg/L, 38.7mg/L, 26.4mg/L, 686.6mg/L and 2756.8mg/L, HABF water outlet COD, BOD
5, TOC, ammonia nitrogen, chlorion and total salt quantity mean concns be at 36.7mg/L, 5.4mg/L, 13.7mg/L, 1.4mg/L, 657.8mg/L and 2676.4mg/L, BAC water outlet COD, BOD
5, TOC, ammonia nitrogen, chlorion and total salt quantity mean concns be at 16.8mg/L, 1.4mg/L, 6.7mg/L, 0.8mg/L, 626.7mg/L and 2578.6mg/L, film device water outlet COD, BOD
5, TOC, ammonia nitrogen, chlorion and total salt quantity mean concns be at 2.7mg/L, 0.2mg/L, 0.7mg/L, 0.1mg/L, 8.6mg/L and 57.5mg/L.
Embodiment 2
Employing is that main process carries out the lab scale experiment at scene, oil field, North China with HABF, the experiment flooding velocity is 4L/h, the effective volume of HABF retort is 16L, hydraulic detention time is 4h, the carrier loadings is 60% (efficient carrier stacking volume is 9.6L), and microbe inoculation is engineering bacteria (BCP35M).The experiment water inlet is the water outlet after the process oil removal air supporting in the oil recovery factory, and saltiness is 5000-10000mg/L, at water inlet COD, BOD
5, TOC, petroleum-type, SS and sulfide mean concns be respectively 124.1mg/L, 62.5mg/L, 37.7mg/L, 19.7mg/L, 130.0mg/L and 19.7mg/L, water outlet COD, BOD
5, TOC, petroleum-type, SS and hydrogen sulfide mean concns be respectively 17.9mg/L, 5.9mg/L, 9.7mg/L, 1.9mg/L, 10.9mg/L and 0.002mg/L, COD, BOD
5, TOC, petroleum-type, SS and hydrogen sulfide average removal rate reach 85.6%, 90.6%, 74.4%, 90.5%, 91.6% and 100%.
Embodiment 3
The technical process of oil removal, flotation, blast aeration " old three covers " is adopted in certain oil Petrochemical Enterprises sewage-farm, the north, the no water quality water yield is regulated measure, and sour water stripping is purified waste water, alkaline residue sewage, oily(waste)water etc. adopt the interflow to handle handling, and therefore often is subjected to the impact of super matter excess sewage variation.Simultaneously, constantly perfect along with oil refining expansion of scale and production equipment reorganization and expansion, total amount of sewage discharge grows with each passing day, and along with improving constantly of crude runs and working depth, pollutant load constantly increases in the sewage that device is discharged, and causes existing sewage-farm to be difficult to adapt to the needs of production and the requirement of emission standard.According to producing and environmental requirement, enterprise shunts processing to waste water, employing is after the biological treatment of core carries out independent pre-treatment to the high density saline sewage that comprises alkaline residue, alkaline water and Electric Desalting Wastewater with HABF, merge with the part oily(waste)water, after further handling, realize qualified discharge.
High density saline sewage (alkaline residue, alkaline water, Electric Desalting Wastewater and sludge dewatering liquid) has following characteristic: the water quality complexity, not only contain the oxygen consumption organic pollutant, also contain all kinds ofly to microorganism hazardous and noxious substances (as sulfide, volatile phenol, petroleum-type) and nutrient for plants (ammonia nitrogen etc.), biodegradability is relatively poor.The emphasis of sewage disposal is to remove COD, sulfide, volatile phenol, petroleum-type and ammonia nitrogen, and this engineering adopts little electrolysis and secondary air-floatation as physico-chemical pretreatment technology, and HABF technology is adopted in biochemical treatment, and the designing treatment water yield is 50m
3/ h, the HABF useful volume is 800m
3, hydraulic detention time is 15h, the carrier loadings is 60%, and (efficient carrier stacking volume is 480m
3), microbe inoculation be engineering bacteria (BCP35M, BCP22, BCP11).By continous-stable operation 5 months at the beginning of 2007 12 months, saltiness is 12000-27000mg/L, be respectively under 1516mg/L, 29.6mg/L and the 57.5mg/L situation in water inlet CODcr, ammonia nitrogen and petroleum-type mean concns, CODcr, ammonia nitrogen and petroleum-type mean concns are respectively 109mg/L, 9.43mg/L and 8.19mg/L in the effluent quality, but continous-stable reaches the secondary discharge standard (GB8978-1996, the unit that builds before on December 31st, 1997) in " integrated wastewater discharge standard ".
Can see by above-mentioned example, the present invention for the film of metallurgy industry reverse osmosis membrane apparatus before the oil extraction waste water or the oil refinery effluent of concentrated solution, different quality, all have good treatment effect, final outflow water can reach one-level or the secondary discharge standard (GB8978-1996) in the integrated wastewater discharge standard; And, because COD, ammonia nitrogen, SS and petroleum-type concentration in the HABF biological treatment water outlet are very low, make up the proper depth treatment process on this basis, water outlet can be satisfied the water quality requirement of relevant reuse water fully, realize waste water reclaiming, reach the purpose that industry energy conservation reduces discharging.
Fig. 1 explanation
------water route
------------road
--------gas circuit
Claims (7)
1. a high slat-containing wastewater is handled or recycling method, it is characterized in that: adopt the PID combination process to handle high slat-containing wastewater, wherein:
The P section is represented pre-treatment, adopts technologies such as oil removal adjusting, precipitation or air supporting;
High efficient aeration biological filter HABF technology is adopted in I section representative biological treatment;
The D section is represented advanced treatment, adopts treatment process such as ozone biological activated carbon or reverse osmosis membrane;
After brine waste process oil removal adjusting, precipitation or the air supporting, most suspended substances SS or petroleum substance in this removal waste water, prevent that SS in the waste water or oils from stopping up the filtrate among the HABF, to guarantee the steady running of follow-up HABF technology, pretreated water outlet enters HABF biological treatment unit, most COD, ammonia nitrogen or petroleum substance in this removal waste water, its water outlet can directly efflux or reuse after appropriate depth is handled, and HABF biological treatment water outlet can be by reuse after the technology desalinations such as reverse osmosis.
2. handle according to the described high slat-containing wastewater of claim 1 or the novel combination process of reuse, it is characterized in that: in the HABF section, adopt the high efficient aeration biological filter can remove most COD in the waste water, ammonia nitrogen or solubilised state petroleum substance, its water outlet can directly efflux or reuse after advanced treatment, dissolved oxygen is 3-5mg/l among the HABF, for example, saltiness less than 5% condition under, oil extraction waste water water outlet COD after HABF handles, BOD5, TOC, petroleum-type, SS and hydrogen sulfide mean concns are respectively 17.9mg/L, 5.9mg/L, 9.7mg/L, 1.9mg/L, 10.9mg/L and 0.002mg/L, COD, BOD
5, TOC, petroleum-type, SS and hydrogen sulfide average removal rate reach 85.6%, 90.6%, 74.4%, 90.5%, 91.6% and 100%.
3. handle according to the described high slat-containing wastewater of claim 1 or the novel combination process of reuse, when containing the not biodegradable organism of higher concentration in the higher or waste water when the standard of efflux wastewater, can behind the HABF biological treatment, put one section ozone-BAC process by tail, not only improved effluent quality, guarantee discharged wastewater met the national standard, and it is stifled to have reduced the dirt of rear end reverse osmosis membrane.
4. handle according to the described high slat-containing wastewater of claim 1 or the novel combination process of reuse, it can realize efficient coupling with wastewater recycling treatment process such as reverse osmosis desalination, the pretreatment technology that is fit to membrane technique in the waste water recycling processing, increase the cycles of concentration of membrane process, realize recycle and enterprise's sewage " zero release " of water resources.
5. handle according to the described high slat-containing wastewater of claim 2 or the novel combination process of reuse, it is characterized in that: used a kind of efficient suspension macropore carrier among the HABF, wherein institute's microbe inoculation is an engineering bacteria, and the original strain of engineering flora is provided by Canadian BIONETIX company.
6. handle according to the described high slat-containing wastewater of claim 4 or the novel combination process of reuse, repeatedly concentrate by multistage, the preceding concentrated solution saltiness of film that enters the HABF biological treatment can reach about 2%, usually the cycles of concentration of municipal administration or sanitary wastewater can reach 15-25 doubly, realize the recycle of water resources effectively, after the art breading such as the preceding a small amount of high slat-containing wastewater process evaporation concentration of film, can realize enterprise's sewage " zero release ".
7. a high slat-containing wastewater as claimed in claim 1 is handled or the reuse combination process, not only be applicable to the qualified discharge or the reuse of the preceding concentrated solution of membrane treatment process film, also be applicable to such as high slat-containing wastewater in the industries such as oil recovery, petrochemical complex, Coal Chemical Industry and pharmacy and handle reuse and existing engineered upgrading.
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| CN102010097A (en) * | 2010-10-22 | 2011-04-13 | 蓝星环境工程有限公司 | Method for recycling carbon fiber wastewater |
| CN102745830A (en) * | 2011-04-18 | 2012-10-24 | 中国科学院研究生院 | Movable treatment assembly for water generated from coalbed gas |
| CN104355445A (en) * | 2014-11-04 | 2015-02-18 | 深圳能源资源综合开发有限公司 | Process and special device for purifying high-salt water in coal chemical industry |
| CN104402156A (en) * | 2014-09-30 | 2015-03-11 | 深圳能源资源综合开发有限公司 | Coal chemical high brine purification, evaporative crystallization and recovery technology and special-purpose equipment |
| CN104556313A (en) * | 2013-10-18 | 2015-04-29 | 中国石油化工股份有限公司 | Method for desalinizing oil-field wastewater with electrodialysis method |
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| CN106477803A (en) * | 2015-08-28 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of processing method of brine waste |
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| CN102010097A (en) * | 2010-10-22 | 2011-04-13 | 蓝星环境工程有限公司 | Method for recycling carbon fiber wastewater |
| CN102745830A (en) * | 2011-04-18 | 2012-10-24 | 中国科学院研究生院 | Movable treatment assembly for water generated from coalbed gas |
| CN104556313A (en) * | 2013-10-18 | 2015-04-29 | 中国石油化工股份有限公司 | Method for desalinizing oil-field wastewater with electrodialysis method |
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| CN104355445A (en) * | 2014-11-04 | 2015-02-18 | 深圳能源资源综合开发有限公司 | Process and special device for purifying high-salt water in coal chemical industry |
| CN104355445B (en) * | 2014-11-04 | 2016-04-20 | 深圳能源资源综合开发有限公司 | A kind of Coal Chemical Industry haline water purification process technique and special purpose device |
| CN104787990B (en) * | 2015-05-06 | 2017-03-29 | 北京交通大学 | A treatment method for high-temperature and high-salt refractory oil production wastewater |
| CN104787990A (en) * | 2015-05-06 | 2015-07-22 | 北京交通大学 | A treatment method for high-temperature and high-salt refractory oil production wastewater |
| CN106477803A (en) * | 2015-08-28 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of processing method of brine waste |
| CN106477803B (en) * | 2015-08-28 | 2019-11-12 | 中国石油化工股份有限公司 | A kind of processing method of brine waste |
| CN106630377A (en) * | 2016-10-18 | 2017-05-10 | 辽宁海润环保技术股份有限公司 | Alkali residue waste water treating method |
| CN111170494A (en) * | 2018-11-12 | 2020-05-19 | 中国石油天然气股份有限公司 | Treatment device for circulating water discharged sewage |
| CN111170494B (en) * | 2018-11-12 | 2022-06-03 | 中国石油天然气股份有限公司 | Treatment device for circulating water discharged sewage |
| CN110877950A (en) * | 2019-11-13 | 2020-03-13 | 佛山科学技术学院 | Water body pollution treatment method based on microbial precipitation technology |
| CN114477643A (en) * | 2022-02-14 | 2022-05-13 | 常州大学 | A new type of advanced treatment system for maleic anhydride wastewater and its process |
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