CN101891325A - Method for treating recycled water by combining chemical oxidation method and double-membrane method - Google Patents
Method for treating recycled water by combining chemical oxidation method and double-membrane method Download PDFInfo
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- CN101891325A CN101891325A CN2009100854928A CN200910085492A CN101891325A CN 101891325 A CN101891325 A CN 101891325A CN 2009100854928 A CN2009100854928 A CN 2009100854928A CN 200910085492 A CN200910085492 A CN 200910085492A CN 101891325 A CN101891325 A CN 101891325A
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Abstract
The invention discloses a method for treating recycled water by combining a chemical oxidation method and a double-membrane method. The chemical oxidation method selected by the method is a UV (Ultraviolet)/Fenton method, and the double-membrane method is an ultrafiltration and reverse osmosis method. A chemical oxidation unit comprises three steps of adjusting pond treatment, chemical oxidation treatment and settling pond treatment. A double-membrane method unit comprises three steps of pretreatment, ultrafiltration treatment and reverse osmosis treatment. The combination of the two units strengthens the impact resistance of the process, prolongs the service life of membranes in the double-membrane method unit; and meanwhile, on the premise of high-quality discharging water, the invention is easy for operating management, has treatment facilities capable of being intermittently started and run, is convenient for the reconstruction and extension of a production scale and reduces influence on ambient environment.
Description
Technical field
The present invention relates to the reuse water process field, particularly a kind of with UV/ Fenton oxidation style and two embrane method treating recycled water by combining methods.
Background technology
With industrial sewage or municipal effluent is the regeneration water source, and after the reclaiming process purifying treatment, this part process water that reaches the water quality standard of process water is called industrial reuse water.
The technical process of " oil removal-flotation-biochemical treatment (activated sludge process)-precipitation " is adopted in the processing of oil refining sewerage more, even physical chemistry treatment schemees such as oil removal, filtration are only arranged, this technology has certain removal effect to chemical oxygen demand (COD) (COD), petroleum-type, and water quality after the processing and reuse requirements in water quality gap are far away.China Petrochemical Industry and PetroChina Company Limited. successively develop the refinery externally discharged waste water through the reclaimed water reuse recycling technology after similar " BAF+ coagulating sedimentation+chlorination+filtration " art breading.The technical process of " BAF+ coagulating sedimentation+chlorination+filtration ", COD, petroleum-type there is certain removal effect, but water quality and higher-grade reuse requirements in water quality gap after handling are far away, its main mechanism of action is biochemical process and physical adsorption, handles back water and contains more bio-refractory organism and recycle and easily cause accumulation.But because China most refinery crude oil source is unstable, production decision is subjected to market clout big, cause the sewage water yield and variation water quality big, treatment process is difficult to adapt to different operating modes, a little less than the impact resistance of treatment unit, outer draining only can qualified discharge, and the example of putting into production property of oil refining sewerage reuse seldom, even it is not thorough that the reuse water advanced treatment apparatus that puts into production of part also exists pollutant removal, be back to defectives such as the big and dependency height of the dosing of recirculated cooling water.
Contain many pollution substances in the sewage after primary treatment, as organic composition, inorganic components, ammonia nitriding compound and phosphoric acid salt etc., therefore in use, except meeting causes conventional corrosion, outside the problems such as fouling, also can bring the peculiar problem of water in some, as ammonia nitrogen, salt bubbles, biological excess growth etc., and influence the normal operation of system.The bio-refractory organism can't be removed in the existing treatment process, and the chlorination degerming causes secondary pollution easily, the not high and poor stability of the water quality grade of follow-up mechanical filter water outlet.In addition, the qualified discharge sewage after the processing is as the reuse water source, and reusing sewage not only can be saved a large amount of new water, increases economic efficiency, and can reduce wastewater disposition significantly, produces social environment benefit.Thereby, demand developing a kind of method of novel treatment reuse water urgently.
Summary of the invention
The purpose of this invention is to provide a kind of chemical oxidation and two embrane method treating recycled water by combining methods.
Chemical oxidation provided by the invention and two embrane method treating recycled water by combining methods are with chemical oxidization method and two embrane method combination treatment industrial reuse water;
Wherein, chemical oxidization method is the UV/ Fenton process, and two embrane methods are that ultrafiltration adds reverse osmosis method.
Chemical oxidation unit comprises equalizing tank processing, chemical oxidation treatment, three steps of settling tank processing.Two membrane method unit comprise pre-treatment, uf processing and three steps of reverse-osmosis treated.
Wherein, the UV/ Fenton process is with Fenton reagent, i.e. " hydrogen peroxide (H
2O
2)+ferrous ion (Fe
2+) " be the chemical oxidation method on basis.
The principle of this method is H
2O
2And Fe
2+Reaction generates hydroxyl radical free radical
OH:
Fe
2++H
2O
2→
·OH+Fe
3++OH
-
The oxidation capacity of OH is extremely strong, and the oxidation capacity in water is only second to fluorine.Simultaneously, the existence of UV-light can promote again greatly
The generation of OH.Therefore, the UV/ Fenton process can carry out oxidation completely with most organic pollutants in the water.
In " two embrane method " treatment step, the used working pressure of ultrafiltration is 4 * 10
4Pa～7 * 10
5Pa, the ultra-filtration membrane aperture is the 10-100 dust; The used working pressure of reverse osmosis is 35 * 10
5Pa～140 * 10
5Pa, the reverse osmosis membrane aperture is the 1-10 dust.
Reuse water treatment process provided by the invention is used chemical oxidization method and two embrane method two unit associations, but UV/ Fenton process exhaustive oxidation organism, and sterilization and disinfection guarantees that good water quality offers follow-up " two embrane method " technology simultaneously.This method has been strengthened the shock resistance of technology, guaranteed the work-ing life of film in two membrane method unit, have under the high quality effluent quality prerequisite simultaneously, have easy handling management, treatment facility can intermittently start operation, be convenient to expand the scale of production change, extend and reduce advantages such as influence to surrounding environment, can reach wide spectrum, efficiently, fast, the purpose of stabilizing treatment reuse water.Water water quality is relatively stable coming, reach under the condition of country-level pollution exhaust criteria, utilize treatment process provided by the invention, " chemical oxidization method " unitary effluent quality can reach the industrial circulating cooling water standard, " two embrane method " unitary water outlet can be as boiler feedwater, and reverse osmosis concentrated water can be used as greening water and reclaimed water simultaneously.This method is applicable to the industrial efflux wastewater after oil removal-air supporting-BAF process integration is handled, and particularly contains the field of wastewater of refractory organic.
Description of drawings
Fig. 1 is the COD of water quality before and after the chemical oxidation treatment
CrValue.
Fig. 2 is the petroleum substance content of water quality before and after the chemical oxidation treatment.
Fig. 3 is the comparison diagram in kind of water outlet before and after the chemical oxidation treatment.
Embodiment
The invention will be further described below in conjunction with specific embodiment, but the present invention is not limited to following examples.Method therefor is routine operation and handles if no special instructions among the embodiment.
Embodiment 1,
Select the industrial efflux wastewater after oil removal-air supporting-biological aerated filter is handled for use, the average COD value of this waste water is 70mg/L, and the average content of petroleum substance is 2.5mg/L.Wherein, the COD value is measured according to potassium dichromate process GB 7488-87.Utilize chemical oxidation provided by the invention-two embrane method associating reuse water treatment processs, according to following steps this sewage handled successively:
1) chemical oxidation treatment unit:
Dispose of sewage with the UV/ Fenton process, this step comprises equalizing tank processing, chemical oxidation treatment and settling tank and handles three concrete steps.Wherein, the equalizing tank treatment step is the pipeline dosing, homogeneous, and the treatment time is 10 minutes; The chemical oxidation treatment step is a Fenton's reaction, and the treatment time is 0.5 hour; The settling tank treatment step is that flocculation basin adds flocculation agent adjusting basicity mistake settling tank precipitation then, and the treatment time is 2 hours.
As depicted in figs. 1 and 2, after the UV/ Fenton process was handled, the COD value of sewage was 35mg/L, and the content of petroleum substance is reduced to 1.0mg/L.Water quality contrast before and after handling as shown in Figure 3.As can be known, after the UV/ Fenton process is handled, go out water clarity and obviously clarify.This effluent quality reaches the industrial circulating cooling water standard.
2) two embrane method processing units:
Continue to dispose of sewage with two embrane methods, used instrument is available from Dongguan rising sun environmental protection company limited.
This step comprises pre-treatment, uf processing and three concrete steps of reverse-osmosis treated.Wherein, pre-treatment step is multi-medium filtering+carbon filter, and the treatment time is 30 minutes; Uf processing, it is 6 * 10 that operation is pressed
5Pa, ultra-filtration membrane molecular weight cut-off are 100,000 dalton, and treatment capacity is 2 cubic metres/hour; Reverse-osmosis treated, it is 90 * 10 that operation is pressed
5Pa, reverse osmosis membrane ratio of desalinization 99.4%, treatment capacity are 2 cubic metres/hour.
After two embrane methods were handled, the COD value of sewage was reduced to 10mg/L, and the content of petroleum substance is reduced to 0.2mg/L.This water outlet can be used as boiler feedwater and uses.
Fig. 1,2 is the numerical value change in the test in the reality, and actual industrial comes the water number value constantly to change, and data also have fluctuation after the subsequent disposal, but final outflow water (being the RO water outlet) numerical value does not almost change assurance final outflow water water quality.
Claims (4)
1. a chemical oxidation and two embrane method combination treatment industrial reuse water methods are with chemical oxidization method and two embrane method combination treatment industrial reuse water;
Wherein, described chemical oxidization method is the UV/ Fenton process, and described pair of embrane method is that ultrafiltration adds reverse osmosis method.
2. in accordance with the method for claim 1, it is characterized in that: in the uf processing of described pair of embrane method, the aperture of ultra-filtration membrane is the 10-100 dust; In the reverse-osmosis treated, the aperture of reverse osmosis membrane is the 1-10 dust.
3. method according to claim 1 and 2 is characterized in that: in the uf processing of described pair of embrane method, the working pressure of ultra-filtration membrane is 4 * 10
4Pa～7 * 10
5Pa;
In the reverse-osmosis treated, the working pressure of reverse osmosis membrane is 35 * 10
5Pa～140 * 10
5Pa.
4. according to the arbitrary described method of claim 1-3, it is characterized in that: the method for described processing industrial reuse water is to handle industrial reuse water with chemical oxidization method earlier, handles industrial reuse water with two embrane methods again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100854928A CN101891325A (en) | 2009-05-22 | 2009-05-22 | Method for treating recycled water by combining chemical oxidation method and double-membrane method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100854928A CN101891325A (en) | 2009-05-22 | 2009-05-22 | Method for treating recycled water by combining chemical oxidation method and double-membrane method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101891325A true CN101891325A (en) | 2010-11-24 |
Family
ID=43100705
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100854928A Pending CN101891325A (en) | 2009-05-22 | 2009-05-22 | Method for treating recycled water by combining chemical oxidation method and double-membrane method |
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|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358651A (en) * | 2011-09-23 | 2012-02-22 | 郑州大学 | Advanced treatment process for fermented pharmaceutical waste water |
| CN104843901A (en) * | 2015-05-14 | 2015-08-19 | 苏州膜海分离技术有限公司 | Bleaching and dyeing wastewater treatment method with combination of advanced oxidation and ultrafiltration |
| CN110981115A (en) * | 2019-12-27 | 2020-04-10 | 江苏旭龙水务有限公司 | Waste emulsion treatment device and waste emulsion treatment method thereof |
-
2009
- 2009-05-22 CN CN2009100854928A patent/CN101891325A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358651A (en) * | 2011-09-23 | 2012-02-22 | 郑州大学 | Advanced treatment process for fermented pharmaceutical waste water |
| CN102358651B (en) * | 2011-09-23 | 2013-06-26 | 郑州大学 | Advanced treatment process for fermented pharmaceutical waste water |
| CN104843901A (en) * | 2015-05-14 | 2015-08-19 | 苏州膜海分离技术有限公司 | Bleaching and dyeing wastewater treatment method with combination of advanced oxidation and ultrafiltration |
| CN110981115A (en) * | 2019-12-27 | 2020-04-10 | 江苏旭龙水务有限公司 | Waste emulsion treatment device and waste emulsion treatment method thereof |
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Application publication date: 20101124 |