CN104724863A - Novel efficient flocculating decolorization method - Google Patents
Novel efficient flocculating decolorization method Download PDFInfo
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- CN104724863A CN104724863A CN201510138933.1A CN201510138933A CN104724863A CN 104724863 A CN104724863 A CN 104724863A CN 201510138933 A CN201510138933 A CN 201510138933A CN 104724863 A CN104724863 A CN 104724863A
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Abstract
The invention discloses a novel efficient flocculating decolorization method, and solves the problems that sewage treated by a single treatment process cannot reach the standard, and treatment combined with three treatment methods has complicated processes, more to-be-controlled conditions, long treatment time, poor treatment effect and relatively high cost. The method comprises the following steps: (1) adding ferrous sulfate, aluminum sulfate and hydrogen peroxide into sewage to form a flocculating decolorizing agent, and adsorbing impurities in the sewage; (2) adding a catalyst to regulate the reacting speed, and forming micro-battery reaction; (3) regulating the pH value of sewage until the sewage is weakly alkaline; and (4) adding PAC and PAMN to carry out coagulation treatment. The method is simple in process flow, easy to operate, small in drug adding amount, low in cost and good in treatment effect, and can be used for effectively solving the problem of treatment of high-COD, high-chromaticity and other high difficulty waste water; the sewage stability is destroyed by an efficient flocculating agent, partially dissolved harmful organic substances and inorganic substances in the sewage can be subjected to oxidative decomposition, and the COD, chromaticity and the like of the sewage can be effectively reduced.
Description
Technical field
The present invention relates to a kind of new and effective flocculation decoloration method, belong to sewage treatment area.
Background technology
The treatment process of current oil-gas field sewage is mainly divided into light electrolysis, chemical method, biochemical process.
Light electrolysis is the electrolysis under low dc voltage state, is the objectionable impurities in the former microbattery degradation of sewage utilizing the iron in sewage and carbon to be formed, improves the biodegradability of sewage.Light electrolysis can reduce part COD and the colourity of sewage, but can not process to qualified discharge, usually need combine with other technologies.General technology route is: light electrolysis, advanced oxidation (or biochemical).
Chemical method reaches destruction sewage stability thus the object being separated objectionable impurities by adding chemical substance.Main method has coagulation: neutralize the electrostatic of colloidal particle by flocculation agent, adsorb, the effect such as bridge formation impels colloidal particle to take off steady and suspension material in sedimentation sewage and insoluble pollutent, to reduce the COD, colourity etc. of sewage; Oxidation: utilize the oxygenants such as ozone, hydrogen peroxide, dioxide peroxide that the inorganics in dissolved state in sewage and oxidation operation are decomposed into micro-poison or nontoxic material, improve the effect of coagulation; Acidifying: can carry out for very strong or in emulsified state the sewage of stability the stability that acidizing pretreatment destroys sewage, reach the object of preliminary sedimentation.Its general operational path is: adjustment, neutralization, coagulation, oxidation, water outlet.
Biochemical process comprises microbial degradation method and activated sludge process, is the biochemical action utilizing microorganism, and make the complicated organic substance decomposing in sewage be simple material, poisonous Substance Transformation is nontoxic material.Its general operational path is: adjustment, oil removal, coagulation, anaerobism, aerobic, sedimentation, filtration, water outlet.
Due to the complicated component of oil-gas field sewage, single treatment technology has limitation, often can not reach water quality requirement, needs three kinds for the treatment of processs to combine use.
Weak electrolysis mechanism is disposed of sewage almost to only have and just can be played good effect in acid condition, pH value affects the topmost factor for the treatment of effect, and complex process, condition control difficult, filler work-ing life short, fluctuation of service, easily fouling, highly difficult, cost of sewage disposal is high; The medicament kind that existing method of chemical treatment needs use is many, dosage large, and can not effectively process highly difficult sewage; Biochemical process is not suitable for the sewage that process biodegradability is poor, COD is high.For the sewage (sewage etc. as high COD, high chroma, high emulsification) that intractability is large, single treatment process often can not be up to standard, and three kinds for the treatment of processs combine and make that complex treatment process, the condition that need control are many, treatment time length, poor processing effect, cost are relatively high.Other novel treatment investments in machinery and equipment are large, and cost is high.
Summary of the invention
The object of the present invention is to provide a kind of new and effective flocculation decoloration method, mainly solve when the sewage that intractability is large, single treatment process often can not be up to standard, and three kinds for the treatment of processs combine make that complex treatment process, the condition that need control are many, treatment time length, poor processing effect, problem that cost is relatively high.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of new and effective flocculation decoloration method, comprises the steps:
(1) in sewage, ferrous sulfate, Tai-Ace S 150, hydrogen peroxide is added, form flocculating decoloring agent and form microbattery reaction, destroy the stability of sewage, in oxygenolysis sewage, the harmful organic substances of part dissolved state and inorganic substance, effectively reduce the COD, colourity etc. of sewage;
(2) add catalyzer and regulate microbattery speed of response, by electric microfield effect, charged colloidal particles is taken off and surely assemble and sedimentation, and nascent state Fe
2+［ H ］ and many component generation reductive actions in sewage, destroy the color development of organic pollutant or auxochrome group and make waste water decoloring, can effectively except the calcium in anhydrating, magnesium ion thus reduce water hardness, the active hydrogen oxyradical that electrolysis simultaneously produces and reactive chlorine can sterilizations;
(3) PH of sewage is adjusted to weakly alkaline;
(4) add PAC and PAM and carry out coagulating treatment, by flocculation agent, the electrostatic of colloidal particle neutralized, adsorb, the effect such as bridge formation impels colloidal particle to take off steady and suspension material in sedimentation sewage and insoluble pollutent, to reduce the COD, colourity etc. of sewage.
Particularly, in described step (1), the reaction conditions forming flocculating decoloring agent is: pH value is 5 ~ 9, and temperature of reaction is 15 DEG C ~ 35 DEG C, and the reaction times is 2h ~ 10h.
Further, in described step (1), ferrous ion and aluminum ions ratio range are 1/4 ~ 3, and the ratio range of ferrous ion and hydrogen peroxide is 1/4 ~ 2, and ferrous sulfate consumption is 0.5g/L ~ 2.5g/L.
Again further, described catalyzer uses Manganse Dioxide or gac or modification sulphonation titanium cyanines.
In addition, the consumption of described PAC is the consumption of 50-100ppm, PAM is 5-20ppm.
Compared with prior art, the present invention has following beneficial effect:
(1) technical process of the present invention is simple, and processing ease, medicament dosage is little, cost is low, treatment effect is good, effective process that must solve the highly difficult waste water such as high COD, high chroma.
(2) efficient flocculant of the present invention destroys the stability of sewage, and the harmful organic substances of part dissolved state and inorganic substance in oxygenolysis sewage, effectively reduce the COD, colourity etc. of sewage.
(3) hydrogen peroxide of the present invention and Fe
2+form Fenton reagent, under catalyst action, peroxidation Hydrogen Energy produces two kinds of active hydroxyl free radicals, thus causes and propagate radical chain reaction, and accelerate the oxidation of organism and reducing substances, advanced oxidation is to COD and NH
3the clearance of-N is 70%---between 80%.
(4) small molecules that the present invention utilizes coagulation technology previous step advanced oxidation can be decomposed is precipitated out from water with other materials, and it is to COD and NH
3the clearance of-N is 50%---between 60%.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Efficient flocculating technology is a kind of novel low cost, high-efficiency oilfield sewage disposal technology, is widely used in the process (pressure break returns sewer, well flushing waste water, drilling waste water etc.) of the highly difficult sewage of high COD, high chroma, high emulsibility etc.This technology mainly utilizes ferrous sulfate, Tai-Ace S 150, and hydrogen peroxide triple interaction forms a kind of high-efficient decolorizing flocculant, carries out brokenly surely, flocculation decoloration to oil-gas field sewage, then reaches the object of decontamination in conjunction with simple coagulation technology.
Embodiment
A kind of new and effective flocculation decoloration method, comprises the steps:
(1) in sewage, ferrous sulfate is added, Tai-Ace S 150, hydrogen peroxide, form flocculating decoloring agent and form microbattery reaction, destroy the stability of sewage, the harmful organic substances of part dissolved state and inorganic substance in oxygenolysis sewage, the COD of effective reduction sewage, colourity etc., the reaction conditions forming flocculating decoloring agent is: pH value is 5 ~ 9, temperature of reaction is 15 DEG C ~ 35 DEG C, reaction times is 2h ~ 10h, its ferrous ions and aluminum ions ratio range are 1/4 ~ 3, the ratio range of ferrous ion and hydrogen peroxide is 1/4 ~ 2, ferrous sulfate consumption is 0.5g/L ~ 2.5g/L,
(3) add catalyzer and regulate microbattery speed of response, by electric microfield effect, charged colloidal particles is taken off and surely assemble and sedimentation, and nascent state Fe
2+［ H ］ and many component generation reductive actions in sewage, destroy the color development of organic pollutant or auxochrome group and make waste water decoloring, can effectively except the calcium in anhydrating, magnesium ion thus reduce water hardness, the active hydrogen oxyradical that simultaneously electrolysis produces and reactive chlorine can sterilizations, and catalyzer uses Manganse Dioxide or gac or modification sulphonation titanium cyanines;
(3) PH of sewage is adjusted to weakly alkaline;
(4) add PAC and PAM and carry out coagulating treatment, by flocculation agent, the electrostatic of colloidal particle neutralized, adsorb, the effect such as bridge formation impels colloidal particle to take off steady and suspension material in sedimentation sewage and insoluble pollutent, to reduce the COD, colourity etc. of sewage, the consumption of PAC is the consumption of 50-100ppm, PAM is 5-20ppm.
This technology mainly employs three kinds of medicaments and forms high efficient flocculant decolorants, and the PH, time, temperature etc. of the dosage of three kinds of medicaments, proportioning, reaction can affect the effect of process.Consider the effect of influencing each other between multiple factor, in order to the preferably high efficient flocculant decolorant that is effective, therefore, in the present embodiment, the reaction conditions forming flocculating decoloring agent is: pH value is 8, and temperature of reaction is 25 DEG C, reaction times is 6h, its ferrous ions and aluminum ions ratio range are 1:3, and the ratio range of ferrous ion and hydrogen peroxide is 1:2, and ferrous consumption is 2.5g/L.
The mechanism of action of the present invention is:
Advanced oxidation: hydrogen peroxide and Fe
2+the oxidation system formed is commonly referred to Fenton reagent.Under catalyst action, peroxidation Hydrogen Energy produces two kinds of active hydroxyl free radicals, thus causes and propagate radical chain reaction, accelerates the oxidation of organism and reducing substances.Advanced oxidation is to COD and NH
3the clearance of-N is 70%---between 80%.
Cohesion and flocculation are generically and collectively referred to as coagulation.Mixed poly-referring to adds some dissolved salts in water, fine suspension or colloidal particle in water is adsorbed mutually and is combined into larger particles, the process precipitated from water.The small molecules utilizing coagulation technology previous step advanced oxidation can be decomposed and other materials are precipitated out from water, and it is to COD and NH
3the clearance of-N is 50%---and between 60%, needed first to adjust to alkalescence on the weak side by counter for ph before coagulation, coagulation just can be made to produce good effect, and coagulation can reduce colourity greatly.
By the new and effective flocculation decoloration method of the present embodiment, obtaining can the water quality of qualified discharge, as shown in table 1, and table 1 is measure to contrast by before the water quality of the oil-gas field sewage after the present embodiment process and process.
Table 1
| Water sample | PH | COD（mg/l） | Colourity | Ammonia nitrogen (mg/l) | Petroleum-type (mg/l) |
| Sewage before process | 12.8 | 8200 | 256 | 32.5 | 43.2 |
| Sewage after process | 7.8 | 88.5 | 2 | 10.6 | 2.4 |
| Emission standard | 6-9 | ≤100 | ＜50 | ≤15 | ≤5 |
Before process, oil-gas field sewage is grey black, and emulsification degree is high, is suspended with black floss, has light aromatising flavour.
Contrast known before and after oil-gas field sewage disposal, efficient flocculating decolouring technology is to the clearance of COD, colourity up to 99%, and treatment effect is splendid.
According to above-described embodiment, just the present invention can be realized well.What deserves to be explained is; under prerequisite based on said structure design, for solving same technical problem, even if make some on the invention without substantial change or polishing; the essence of the technical scheme adopted is still the same with the present invention, therefore it also should in protection scope of the present invention.
Claims (5)
1. a new and effective flocculation decoloration method, is characterized in that, comprise the steps:
(1) in sewage, add ferrous sulfate, Tai-Ace S 150, hydrogen peroxide, form flocculating decoloring agent and form microbattery reaction, impurity in absorption effluent;
(2) add catalyzer and regulate microbattery speed of response;
(3) PH of sewage is adjusted to weakly alkaline;
(4) add PAC and PAM and carry out coagulating treatment.
2. the new and effective flocculation decoloration method of one according to claim 1, is characterized in that, in described step (1), the reaction conditions forming flocculating decoloring agent is: pH value is 5 ~ 9, and temperature of reaction is 15 DEG C ~ 35 DEG C, and the reaction times is 2h ~ 10h.
3. the new and effective flocculation decoloration method of one according to claim 2, it is characterized in that, in described step (1), ferrous ion and aluminum ions ratio range are 1/4 ~ 3, the ratio range of ferrous ion and hydrogen peroxide is 1/4 ~ 2, and ferrous sulfate consumption is 0.5g/L ~ 2.5g/L.
4. the new and effective flocculation decoloration method of one according to claim 3, is characterized in that, described catalyzer uses Manganse Dioxide or gac or modification sulphonation titanium cyanines.
5. the new and effective flocculation decoloration method of one according to claim 4, is characterized in that, the consumption of described PAC is the consumption of 50-100ppm, PAM is 5-20ppm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109455842A (en) * | 2018-11-13 | 2019-03-12 | 广东溢达纺织有限公司 | A kind of efficient decolorizing technique of the organic solvent containing dyestuff |
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| JPS62241596A (en) * | 1986-04-11 | 1987-10-22 | Kurita Water Ind Ltd | Treatment of waste water containing organic matter |
| US20030132166A1 (en) * | 2002-01-15 | 2003-07-17 | Paul Rey | Method of treating mine drainage |
| CN102976509A (en) * | 2012-10-30 | 2013-03-20 | 中国石油化工股份有限公司 | Treating method for gas production waste liquid with high content of sulfur |
| CN103214124A (en) * | 2013-05-13 | 2013-07-24 | 达州军华油田工程服务有限公司 | Gas production wastewater desulfurization purification pretreatment technology |
| CN103896448A (en) * | 2012-12-26 | 2014-07-02 | 天津市庆安特种设备研发有限公司 | Novel process of rock debris wastewater treatment |
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2015
- 2015-03-27 CN CN201510138933.1A patent/CN104724863A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62241596A (en) * | 1986-04-11 | 1987-10-22 | Kurita Water Ind Ltd | Treatment of waste water containing organic matter |
| US20030132166A1 (en) * | 2002-01-15 | 2003-07-17 | Paul Rey | Method of treating mine drainage |
| CN102976509A (en) * | 2012-10-30 | 2013-03-20 | 中国石油化工股份有限公司 | Treating method for gas production waste liquid with high content of sulfur |
| CN103896448A (en) * | 2012-12-26 | 2014-07-02 | 天津市庆安特种设备研发有限公司 | Novel process of rock debris wastewater treatment |
| CN103214124A (en) * | 2013-05-13 | 2013-07-24 | 达州军华油田工程服务有限公司 | Gas production wastewater desulfurization purification pretreatment technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109455842A (en) * | 2018-11-13 | 2019-03-12 | 广东溢达纺织有限公司 | A kind of efficient decolorizing technique of the organic solvent containing dyestuff |
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Effective date of registration: 20160622 Address after: 610000, No. 1, building 1, No. 712, 1700, Tianfu Avenue, north section, Tianfu Road, Chengdu, Sichuan. 7 Applicant after: Sichuan lung long Environmental Protection Technology Co., Ltd. Address before: 636150 Sichuan province Dazhou Xuanhan County seven Li Township ten villages one society Applicant before: Jun Hua Environmental Protection Technology Co., Ltd of Dazhou City |
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Application publication date: 20150624 |