CN102964039A - Method for treating refractory organic sewage with high salt content - Google Patents
Method for treating refractory organic sewage with high salt content Download PDFInfo
- Publication number
- CN102964039A CN102964039A CN2012105608029A CN201210560802A CN102964039A CN 102964039 A CN102964039 A CN 102964039A CN 2012105608029 A CN2012105608029 A CN 2012105608029A CN 201210560802 A CN201210560802 A CN 201210560802A CN 102964039 A CN102964039 A CN 102964039A
- Authority
- CN
- China
- Prior art keywords
- reverse osmosis
- membrane bioreactor
- sewage
- water
- high saliferous
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method for treating refractory organic sewage with a high content of salt. The method comprises four steps: (1) oil-water separation; (2) chemical oxidation; (3) treatment by a membrane bioreactor; and (4) reverse osmosis for desalination. According to the invention, by means of combining a chemical method, a physical method and a biological method, a complementary treatment technology system is formed, the limitation of single technology is overcome, the optimization of a treatment effect is realized, and the purposes of up-to-standard treatment and reutilization of the sewage are achieved.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of high saliferous difficult-degradation organic sewage treatment process.
Background technology
At present, all kinds of organic sewages that discharge in the Industrial processes are increasing, the organic sewage that causes in particularly printing and dyeing, petrochemical industry, medicine and the pesticide producing process, such sewage are large with toxicity, salinity is high, Pollutant levels are high, the characteristic of difficult for biological degradation and become a great problem that the puzzlement current environment is administered.
Hardly degraded organic substance refers to do not decomposed or decompose by microorganism slow, and the general designation of decomposing a halfway type organic, comprises polycyclic aromatic hydrocarbons, halohydrocarbon, heterocyclic organism, organic pesticide, dyestuff, tensio-active agent etc.This pollutant is in vivo enrichment easily, if these materials are not administered and are discharged in the environment, will cause serious environmental pollution, and finally threatens the healthy of the mankind.Therefore, the improvement of hardly degraded organic substance research has caused domestic and international experts and scholars' great attention, becomes the focus of current water prevention and cure of pollution research.
At present, the treatment process of high saliferous difficult-degradation organic sewage mainly contains chemical oxidization method, physisorphtion, membrane separation process, burning disposal method, biochemical process etc.These methods respectively have relative merits, and biochemical treatment process technique is simple, and cost is low, but because such sewage saltiness is higher, and the pollution substance complexity is various, single biological treatment is difficult to the treatment effect that reaches desirable; Although physisorphtion has preferably treatment effect, cost is high, is difficult to realize large-scale application.Therefore, for the characteristic of such high saliferous, difficult-degradation organic sewage, chemistry, physics, biological process are united, form complementary improvement technical system, can realize the regulation effect optimization, reach the purpose of sewage disposal recycling up to standard.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of solution to have the existing deficiency of high saliferous difficult-degradation organic sewage treatment technology now, discloses a kind of high saliferous difficult-degradation organic sewage treatment process.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of high saliferous difficult-degradation organic sewage treatment process comprises (1) oily water separation; (2) chemical oxidation; (3) Membrane Bioreactor for Wastewater Treatment; (4) four steps of reverse osmosis desalination.
Specifically, may further comprise the steps:
(1) oily water separation: utilize the difference in specific gravity of oil, water, separate and remove the oil phase pollutent of suspension;
(2) chemical oxidation: the high saliferous difficult-degradation organic sewage after step (1) processing is passed into the oxidizing reaction pond, add oxygenant, fully stir, oxygenant is fully contacted with hardly degraded organic substance, the oxygenizement of utilizing oxygenant is oxidized to hardly degraded organic substance small molecules, is easy to the organism of biochemical degradation, or mineralising is carbonic acid gas and water;
(3) Membrane Bioreactor for Wastewater Treatment: the sewage after will processing through step (2) passes in the membrane bioreactor, removes organism by the metabolism of living microorganism;
(4) reverse osmosis desalination: the water outlet of step (3) membrane bioreactor is filtered by cartridge filter under pressure-driven, the filtration water outlet enters reverse osmosis system and carries out desalination, process water outlet up to standard through reverse osmosis system and be recovered utilization, dense water is then got back to step (3) membrane bioreactor and is processed.
The part of the water outlet that the reverse osmosis system in the described step (4) is up to standard is used for reverse osmosis system is carried out back flushing.
Oxygenant in the described step (2) is a kind of in Fenton-like reagent, Sodium Persulfate or the potassium permanganate, and the mol ratio of oxygenant and hardly degraded organic substance is 100～500:1.
Membrane bioreactor adopts Pvdf Microporous Hollow Fiber Membrane in the described step (3), membrane pore size 0.25～0.4 μ m, and aeration control is at gas-water ratio 15～20:1.
Described sewage is COD
CrContent is higher than 2000mg/L, and saltiness is not less than 5wt%, and pH is 8～11.
The invention has the beneficial effects as follows: by chemical method, Physical, biological process are united, formed complementary improvement technical system, overcome the limitation of monotechnics, realized the optimization of regulation effect, reached the purpose of sewage disposal recycling up to standard.
Description of drawings
Fig. 1 is the process route chart of the high saliferous difficult-degradation organic sewage of the present invention treatment process.
Embodiment
A kind of high saliferous difficult-degradation organic sewage treatment process of the present invention comprises (1) oily water separation; (2) chemical oxidation; (3) Membrane Bioreactor for Wastewater Treatment; (4) four steps of reverse osmosis desalination.
Specifically, may further comprise the steps:
(1) oily water separation: utilize the difference in specific gravity of oil, water, separate and remove the oil phase pollutent of suspension;
(2) chemical oxidation: the high saliferous difficult-degradation organic sewage after step (1) processing is passed into the oxidizing reaction pond, add oxygenant, fully stir, oxygenant is fully contacted with hardly degraded organic substance, the oxygenizement of utilizing oxygenant is oxidized to hardly degraded organic substance small molecules, is easy to the organism of biochemical degradation, or mineralising is carbonic acid gas and water;
(3) Membrane Bioreactor for Wastewater Treatment: the sewage after will processing through step (2) passes in the membrane bioreactor, removes organism by the metabolism of living microorganism;
(4) reverse osmosis desalination: the water outlet of step (3) membrane bioreactor is filtered by cartridge filter under pressure-driven, the filtration water outlet enters reverse osmosis system and carries out desalination, process water outlet up to standard through reverse osmosis system and be recovered utilization, dense water is then got back to step (3) membrane bioreactor and is processed.
The part of the water outlet that the reverse osmosis system in the described step (4) is up to standard is used for reverse osmosis system is carried out back flushing.
Oxygenant in the described step (2) is a kind of in Fenton-like reagent, Sodium Persulfate or the potassium permanganate, and the mol ratio of oxygenant and hardly degraded organic substance is 100～500:1.
Membrane bioreactor adopts Pvdf Microporous Hollow Fiber Membrane in the described step (3), membrane pore size 0.25～0.4 μ m, and aeration control is at gas-water ratio 15～20:1.
Described sewage is COD
CrContent is higher than 2000mg/L, and saltiness is not less than 5wt%, and pH is 8～11.
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
As shown in Figure 1, the present invention be directed to a kind of method that high saliferous difficult-degradation organic sewage that the pesticide chemical production process causes is processed.The present invention unites chemical method, Physical, biological process, has formed complementary improvement technical system, has overcome the limitation of monotechnics, has realized the optimization of regulation effect, reaches the purpose of sewage disposal recycling up to standard.The mode that the present invention adopts " oily water separation---chemical oxidation---membrane bioreactor (MBR)---cartridge filter---reverse osmosis system (RO) " to combine is processed sewage, give full play to the advantage of each technology, evaded the weak point of monotechnics.
Embodiment 1
Sewage to certain pesticide producing process discharging is analyzed, and the result shows that each physical parameter of sewage is:
| Project | CODcr | pH | Saltiness |
| Numerical value | 2300～2500mg/L | 8～10 | 6wt%～7wt% |
According to following step this sewage is processed:
(1) oily water separation: the top at sewage collecting pool arranges oil exit pipe, utilizes oil, water difference of specific gravity, by oil exit pipe oil slick is discharged outside the pond, unified collection and treatment.
(2) chemical oxidation: the sewage after step 1 processing is pumped in the oxidizing reaction pond, to wherein adding Fenton-like reagent (H
2O
2The complex compound of/trivalent iron salt and EDETATE DISODIUM), wherein the mol ratio of H2O2 and trivalent iron salt complex compound is controlled at about 50:1, H in the sewage
2O
2Content is controlled at about mol ratio 450:1 with organic pollutant, stirs it is mixed, and reacts 12 hours.
(3) membrane bioreactor: the sewage after will processing through step 2 passes in the membrane bioreactor, removes organism by the metabolism of living microorganism, and described living microorganism is taken from the active sludge of sewage work, has carried out the salt tolerant cultivation before the use; Described membrane bioreactor adopts Pvdf Microporous Hollow Fiber Membrane, and membrane pore size is 0.4 μ m, and aeration control is at gas-water ratio 20:1, the about 13.5L/m of membrane flux
2H, the organic matter removal rate is up to more than 90% in the sewage after Membrane Bioreactor for Wastewater Treatment, and the sewage after the processing enters subsequent processing.
(4) reverse osmosis desalination: the water outlet of step 3 membrane bioreactor is filtered by cartridge filter under pressure-driven, the filtration water outlet enters reverse osmosis system and carries out desalination, the producing water ratio of reverse osmosis system is controlled at about 70%, the part of reverse osmosis system water outlet is used for system is carried out back flushing, the overwhelming majority is recovered utilization, and the dense water of system is then got back to step 3 membrane bioreactor and processed.
Through above-mentioned four steps such sewage is processed, effluent quality is as shown in the table:
| Project | CODcr | pH | Specific conductivity |
| Numerical value | 15～20mg/L | 8～10 | Be lower than 15 μ S/cm |
Embodiment 2
Sewage to certain chemical dyestuff production process discharging is analyzed, and the result shows that each physical parameter of sewage is:
| Project | CODcr | pH | Saltiness |
| Numerical value | 2000～2600mg/L | 8～11 | 10wt%～13wt% |
According to following step this sewage is processed:
(1) oily water separation: the top at sewage collecting pool arranges oil exit pipe, utilizes oil, water difference of specific gravity, by oil exit pipe oil slick is discharged outside the pond, unified collection and treatment.
(2) chemical oxidation: the sewage after step 1 processed pumps in the oxidizing reaction pond, to wherein adding Sodium Persulfate, its starting point concentration is maintained about mol ratio 200:1 with organic pollutant, stirs it is mixed, and reacts 12 hours.
(3) membrane bioreactor: the sewage after will processing through step 2 passes in the membrane bioreactor, removes organism by the metabolism of living microorganism, and described living microorganism is taken from the active sludge of sewage work, has carried out the salt tolerant cultivation before the use; Described membrane bioreactor adopts Pvdf Microporous Hollow Fiber Membrane, and membrane pore size is 0.25 μ m, and aeration control is at gas-water ratio 15:1, the about 10.5L/m of membrane flux
2H, the organic matter removal rate is up to more than 90% in the sewage after Membrane Bioreactor for Wastewater Treatment, and the sewage after the processing enters subsequent processing.
(4) reverse osmosis desalination: the water outlet of step 3 membrane bioreactor is filtered by cartridge filter under pressure-driven, the filtration water outlet enters reverse osmosis system and carries out desalination, the producing water ratio of reverse osmosis system is controlled at about 70%, the part of reverse osmosis system water outlet is used for system is carried out back flushing, the overwhelming majority is recovered utilization, and the dense water of system is then got back to step 3 membrane bioreactor and processed.
Through above-mentioned four steps such sewage is processed, effluent quality is as shown in the table:
| Project | CODcr | pH | Specific conductivity |
| Numerical value | 15～18mg/L | ≈9 | Be lower than 10 μ S/cm |
Embodiment 3
Sewage to certain chemical industry spraying process discharging is analyzed, and the result shows that each physical parameter of sewage is:
| Project | CODcr | pH | Saltiness |
| Numerical value | 2100～2400mg/L | 8～10 | 5wt%～7wt% |
According to following step this sewage is processed:
(1) oily water separation: the top at sewage collecting pool arranges oil exit pipe, utilizes oil, water difference of specific gravity, by oil exit pipe oil slick is discharged outside the pond, unified collection and treatment.
(2) chemical oxidation: the sewage after step 1 processed pumps in the oxidizing reaction pond, to wherein adding sodium permanganate, its starting point concentration is maintained about mol ratio 150:1 with organic pollutant, stirs it is mixed, and reacts 10 hours.
(3) membrane bioreactor: the sewage after will processing through step 2 passes in the membrane bioreactor, removes organism by the metabolism of living microorganism, and described living microorganism is taken from the active sludge of sewage work, has carried out the salt tolerant cultivation before the use; Described membrane bioreactor adopts Pvdf Microporous Hollow Fiber Membrane, membrane pore size is 0.4 μ m, and aeration control is at gas-water ratio 18:1, the about 14L/m2h of membrane flux, the organic matter removal rate is up to more than 90% in the sewage after Membrane Bioreactor for Wastewater Treatment, and the sewage after the processing enters subsequent processing.
(4) reverse osmosis desalination: the water outlet of step 3 membrane bioreactor is filtered by cartridge filter under pressure-driven, the filtration water outlet enters reverse osmosis system and carries out desalination, the producing water ratio of reverse osmosis system is controlled at about 70%, the part of reverse osmosis system water outlet is used for system is carried out back flushing, the overwhelming majority is recovered utilization, and the dense water of system is then got back to step 3 membrane bioreactor and processed.
Through above-mentioned four steps such sewage is processed, effluent quality is as shown in the table:
| Project | CODcr | pH | Specific conductivity |
| Numerical value | 13～15mg/L | 7～9 | Be lower than 11 μ S/cm |
In sum, content of the present invention is not limited in the above-described embodiment, and the knowledgeable people in the same area can propose other embodiment easily within technical director's thought of the present invention, but this embodiment comprises within the scope of the present invention.
Claims (6)
1. one kind high saliferous difficult-degradation organic sewage treatment process is characterized in that, comprises (1) oily water separation; (2) chemical oxidation; (3) Membrane Bioreactor for Wastewater Treatment; (4) four steps of reverse osmosis desalination.
2. high saliferous difficult-degradation organic sewage treatment process according to claim 1 is characterized in that, may further comprise the steps:
(1) oily water separation: utilize the difference in specific gravity of oil, water, separate and remove the oil phase pollutent of suspension;
(2) chemical oxidation: the high saliferous difficult-degradation organic sewage after step (1) processing is passed into the oxidizing reaction pond, add oxygenant, fully stir, oxygenant is fully contacted with hardly degraded organic substance, the oxygenizement of utilizing oxygenant is oxidized to hardly degraded organic substance small molecules, is easy to the organism of biochemical degradation, or mineralising is carbonic acid gas and water;
(3) Membrane Bioreactor for Wastewater Treatment: the sewage after will processing through step (2) passes in the membrane bioreactor, removes organism by the metabolism of living microorganism;
(4) reverse osmosis desalination: the water outlet of step (3) membrane bioreactor is filtered by cartridge filter under pressure-driven, the filtration water outlet enters reverse osmosis system and carries out desalination, process water outlet up to standard through reverse osmosis system and be recovered utilization, dense water is then got back to step (3) membrane bioreactor and is processed.
3. high saliferous difficult-degradation organic sewage treatment process according to claim 2 is characterized in that, the part of the water outlet that the reverse osmosis system in the described step (4) is up to standard is used for reverse osmosis system is carried out back flushing.
4. high saliferous difficult-degradation organic sewage treatment process according to claim 2, it is characterized in that, oxygenant in the described step (2) is a kind of in Fenton-like reagent, Sodium Persulfate or the potassium permanganate, and the mol ratio of oxygenant and hardly degraded organic substance is 100～500:1.
5. high saliferous difficult-degradation organic sewage treatment process according to claim 2, it is characterized in that: membrane bioreactor adopts Pvdf Microporous Hollow Fiber Membrane in the described step (3), membrane pore size 0.25～0.4 μ m, aeration control is at gas-water ratio 15～20:1.
6. high saliferous difficult-degradation organic sewage treatment process according to claim 1, it is characterized in that: described sewage is COD
CrContent is higher than 2000mg/L, and saltiness is not less than 5wt%, and pH is 8～11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105608029A CN102964039A (en) | 2012-12-19 | 2012-12-19 | Method for treating refractory organic sewage with high salt content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105608029A CN102964039A (en) | 2012-12-19 | 2012-12-19 | Method for treating refractory organic sewage with high salt content |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102964039A true CN102964039A (en) | 2013-03-13 |
Family
ID=47794512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105608029A Pending CN102964039A (en) | 2012-12-19 | 2012-12-19 | Method for treating refractory organic sewage with high salt content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102964039A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803555A (en) * | 2015-04-14 | 2015-07-29 | 谭建忠 | Mobile skid-mounted equipment for efficient water treatment |
| CN105923902A (en) * | 2016-05-23 | 2016-09-07 | 广东全务环保科技有限公司 | Drug manufacture waste water reuse system and process |
| CN107352742A (en) * | 2017-08-08 | 2017-11-17 | 中国石油天然气集团公司 | A kind of difficult degradation wastewater electrochemical treatment composite oxidation technology and its system |
| CN108218109A (en) * | 2017-12-22 | 2018-06-29 | 南京工大环境科技南通有限公司 | A kind of processing method of high salt organic waste water |
| CN113860560A (en) * | 2021-10-26 | 2021-12-31 | 四川大学 | Method for removing organic pollutants in high-salinity wastewater |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267781A (en) * | 2011-06-24 | 2011-12-07 | 苏州苏净环保工程有限公司 | Method for treating high-salinity refractory organic wastewater |
-
2012
- 2012-12-19 CN CN2012105608029A patent/CN102964039A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267781A (en) * | 2011-06-24 | 2011-12-07 | 苏州苏净环保工程有限公司 | Method for treating high-salinity refractory organic wastewater |
Non-Patent Citations (2)
| Title |
|---|
| 王清涛等: "3T-AF/BAF-MBR-RO 组合工艺处理焦化废水中试研究", 《煤化工》 * |
| 陆茵: "柠檬酸生产废水的深度处理与回用技术", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803555A (en) * | 2015-04-14 | 2015-07-29 | 谭建忠 | Mobile skid-mounted equipment for efficient water treatment |
| CN105923902A (en) * | 2016-05-23 | 2016-09-07 | 广东全务环保科技有限公司 | Drug manufacture waste water reuse system and process |
| CN107352742A (en) * | 2017-08-08 | 2017-11-17 | 中国石油天然气集团公司 | A kind of difficult degradation wastewater electrochemical treatment composite oxidation technology and its system |
| CN107352742B (en) * | 2017-08-08 | 2020-08-11 | 中国石油天然气集团公司 | Electrochemical composite oxidation process and system for refractory sewage |
| CN108218109A (en) * | 2017-12-22 | 2018-06-29 | 南京工大环境科技南通有限公司 | A kind of processing method of high salt organic waste water |
| CN113860560A (en) * | 2021-10-26 | 2021-12-31 | 四川大学 | Method for removing organic pollutants in high-salinity wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203568944U (en) | Coking wastewater reuse treatment system | |
| CN102795746B (en) | Treatment method for waste incineration power plant leachate and device thereof | |
| CN105600880B (en) | A kind of advanced treatment apparatus of nitrogen-containing heterocycle compound chemical industry tail water and combinations thereof technique | |
| CN103979732B (en) | The film biological treating equipment of methane and sulfur-bearing nitrogenous effluent associated treatment and method thereof | |
| CN103613254B (en) | The deep treatment method of fine chemistry industry garden sewage work organic wastewater with difficult degradation thereby | |
| CN205603403U (en) | Advanced treatment unit of nitrogenous heterocyclic compound chemical industry tail water and electricity chemical oxidation unit thereof | |
| CN101311132A (en) | Waste water recycling comprehensive processing process | |
| CN203307175U (en) | Deep coking wastewater treatment device by using advanced oxidation process combined with membrane bioreactor | |
| CN106977042A (en) | A kind of modularization integrated approach handled suitable for soy sauce brewing wastewater | |
| CN105481174A (en) | Wastewater treatment system in rubber and synthetic plastic industry | |
| Guo et al. | Research progress of high-salinity wastewater treatment technology | |
| CN102964039A (en) | Method for treating refractory organic sewage with high salt content | |
| Nishat et al. | Wastewater treatment: A short assessment on available techniques | |
| CN102267781A (en) | Method for treating high-salinity refractory organic wastewater | |
| CN104891733A (en) | Treatment method of landfill leachate | |
| CN106186554A (en) | A kind of to PTA sewage after double film desalination reuses the preprocess method of the remaining dense water of RO | |
| CN103755092A (en) | Novel textile dyeing and finishing waste water deep treatment and recycling method | |
| CN205676312U (en) | A kind of offshore platform high salt life sewage treatment and reuse equipment | |
| CN105271590A (en) | Treatment method of wastewater containing low-concentration methanol in gas field | |
| CN102774998B (en) | High-salinity high-chromaticity printing and dyeing wastewater recovery process and equipment thereof | |
| CN211226806U (en) | Zero release processing system of cosmetics waste water | |
| CN102267785B (en) | Renewable water treatment device and method by use of micro-polluted water bodies as sources | |
| CN102363549A (en) | Deep treatment system of membraneless industrial organic wastewater | |
| CN201634523U (en) | Continuous three-phase fluidization ozone oxidation reactor | |
| CN211620257U (en) | Ozone catalytic oxidation coupling microalgae method wastewater treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130313 |