CN102718368B - Method for treating high-concentration phenol-contained wastewater into easily-biochemically-treated wastewater - Google Patents
Method for treating high-concentration phenol-contained wastewater into easily-biochemically-treated wastewater Download PDFInfo
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- CN102718368B CN102718368B CN 201210236247 CN201210236247A CN102718368B CN 102718368 B CN102718368 B CN 102718368B CN 201210236247 CN201210236247 CN 201210236247 CN 201210236247 A CN201210236247 A CN 201210236247A CN 102718368 B CN102718368 B CN 102718368B
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Abstract
The invention provides a method for treating high-concentration phenol-contained wastewater into easily-biochemically-treated wastewater. The treating method is characterized by comprising the following steps of: step 1: adjusting a pH value of the high-concentration phenol-contained wastewater with a phenol-content of 12000ppm and COD of 24000ppm to 8 by using a sodium hydroxide solution, and injecting one ton of wastewater into a reaction kettle; step 2: introducing steam into the reaction kettle for heating, and controlling the temperature to be 60 DEG C; adding 2.5g of and laccase, continuously agitating and carrying out heat preservation for 40 min; step 3: adding 2g of H2O2 to the reaction kettle and reacting after the heat preservation is finished, controlling the reaction temperature to be at 56 DEG C; continuously agitating and carrying out heat preservation for 2.5 hours; step 4: after the reaction, carrying out negative-pressure distillation on the wastewater in the reaction kettle, wherein the vacuum degree in the reaction kettle is more than or equal to 0.09MPa in a distillation process and the heating temperature is more than or equal to 90 DEG C; and step 5: collecting when the phenol content in a front fraction approaches 100ppm during the distillation process, and obtaining the easily-biochemically-treated wastewater with the phenol-content of 84ppm and COD of 9750ppm.
Description
Technical field
What the present invention relates to is a kind of wastewater treatment method, and especially a kind of high-concentration phenolic wastewater is processed into the method for easy biochemical treatment waste water.
Background technology
Phenol is raw material and intermediate commonly used in a kind of chemical industry, and the phenolic wastewater source is wider, endangers very serious.Phenolic compound is a kind of prototype poisonous substance processed, and all biological plastids are had certain damaging effect.In the prior art, handle wastewater from chemical industry and generally all adopt biochemical process, physics method, chemical method three major types, but these known treatment processs all can not effectively be handled high-concentration phenolic wastewater, and, also can produce secondary pollution in treating processes, this is the existing in prior technology weak point.
Summary of the invention:
Technical problem to be solved by this invention is exactly at the existing in prior technology deficiency, and the method and technology scheme that provides a kind of high-concentration phenolic wastewater to be processed into easy biochemical treatment waste water, this scheme adopts the biomass laccase to make catalyzer, H
2O
2Make oxygenant, treatment process is environmentally friendly, can not produce secondary pollution, waste water after treatment, and the method that is easy to adopt routine biochemistry to handle waste water reaches its processing the water purification of emission standard.
This programme is realized by following technical measures: high-concentration phenolic wastewater is processed into the method for easy biochemical treatment waste water, is characterized in that the step of this treatment process is as follows:
Step 1: be 12000ppm with phenol content, COD is the high-concentration phenolic wastewater of 24000ppm, and the sodium hydroxide solution of employing is adjusted to pH value to 8, and 1 ton high-concentration phenolic wastewater is injected in the reactor;
Step 2: feed steam heating in reactor, temperature is controlled at 60 ℃, adds laccase, and the laccase add-on is 2.5 grams, and continuously stirring is incubated 40 minutes;
Step 3: after finishing insulation, in reactor, add H
2O
2React H
2O
2Add-on is 2 grams, and the control temperature of reaction is at 56 ℃, and continuously stirring, is incubated 2.5 hours;
Step 4: after the reaction, waste water in the reactor is carried out vacuum distillation, vacuum tightness 〉=0.09MPa in the reactor in the still-process, Heating temperature 〉=90 ℃;
Step 5: detect front-end volatiles in the still-process, when phenol content in the front-end volatiles begins during near 100ppm to collect, it is 84ppm that the water outlet that obtains contains the phenol amount, COD is that the branch of 9750ppm is dried up, be the waste water of easy biochemical treatment, when distillation debris volume at the bottom of the still stops heating 1/5 the time, the residue in the still is discharged burning disposal.
The beneficial effect of this programme can be learnt according to the narration to such scheme, owing to adopt the biomass laccase to make catalyzer, H in this scheme
2O
2Handle as oxygenant.Laccase has certain katalysis, and phenol dehydrogenation reaction takes place by the laccase oxidation time generates free radical, and phenol is oxidized to quinone through behind a series of non-enzyme reactions, and going back the ortho states laccase is having H
2O
2Can be oxidized under the condition that exists, while H
2O
2Also can be reduced into water.Because fracture or the generation of key can further take place in the formed free radical instability of substrate, cause cracking and copolymerization.So make treatment process environmentally friendly, can not produce secondary pollution.Waste water treatment process is simple, and production process has stronger stability, and energy consumption is low, the plant factor height, and the operation of equipment simple possible, the phenol clearance reaches more than 90%.After handling, the biodegradability of waste water improves greatly, handles for follow-up wastewater biochemical and haves laid a good foundation.And this programme running cost is lower, laccase and H
2O
2Consumption is less, and facility investment is less, and dephenolize efficient height can be widely used in handling high-concentration phenolic wastewater.This shows that the present invention has compared with prior art solved the difficult problem that high-concentration phenolic wastewater is handled, and has higher using value, so this programme has outstanding substantive distinguishing features and obvious improvement, the beneficial effect of its enforcement also is apparent.
Embodiment:
For clearly demonstrating the technical characterstic of this programme, below by an embodiment, this programme is set forth.
Embodiment: the method that high-concentration phenolic wastewater is processed into easy biochemical treatment waste water is that the step of this treatment process is as follows:
Step 1: be 12000ppm with phenol content, COD is the high-concentration phenolic wastewater of 24000ppm, and the sodium hydroxide solution of employing is adjusted to pH value to 8, and 1 ton high-concentration phenolic wastewater is injected in the reactor;
Step 2: feed steam heating in reactor, temperature is controlled at 60 ℃, adds laccase, and the laccase add-on is 2.5 grams, and continuously stirring is incubated 40 minutes;
Step 3: after finishing insulation, in reactor, add H
2O
2React H
2O
2Add-on is 2 grams, and the control temperature of reaction is at 56 ℃, and continuously stirring, is incubated 2.5 hours;
Step 4: after the reaction, waste water in the reactor is carried out vacuum distillation, vacuum tightness 〉=0.09MPa in the reactor in the still-process, Heating temperature 〉=90 ℃;
Step 5: detect front-end volatiles in the still-process, when phenol content in the front-end volatiles begins during near 100ppm to collect, it is 84ppm that the water outlet that obtains contains the phenol amount, COD is that the branch of 9750ppm is dried up, be the waste water of easy biochemical treatment, when distillation debris volume at the bottom of the still stops heating 1/5 the time, the residue in the still is discharged burning disposal.
The present invention is not limited in above-mentioned embodiment, and the variation that those of ordinary skills make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.
Claims (1)
1. a high-concentration phenolic wastewater is processed into the method for easy biochemical treatment waste water, and it is characterized in that: its step of this treatment process is as follows:
Step 1: be 12000ppm with phenol content, COD is the high-concentration phenolic wastewater of 24000ppm, adopts
With sodium hydroxide solution be adjusted to pH value to 8, and 1 ton high-concentration phenolic wastewater is injected in the reactor;
Step 2: feed steam heating in reactor, temperature is controlled at 60 ℃, adds laccase, and the laccase add-on is 2.5 grams, and continuously stirring is incubated 40 minutes;
Step 3: after finishing insulation, in reactor, add H
2O
2React H
2O
2Add-on is 2 grams, and the control temperature of reaction is at 56 ℃, and continuously stirring, is incubated 2.5 hours;
Step 4: after the reaction, waste water in the reactor is carried out vacuum distillation, vacuum tightness 〉=0.09MPa in the reactor in the still-process, Heating temperature 〉=90 ℃;
Step 5: detect front-end volatiles in the still-process, when phenol content in the front-end volatiles begins during near 100ppm to collect, it is 84ppm that the water outlet that obtains contains the phenol amount, COD is that the branch of 9750ppm is dried up, be the waste water of easy biochemical treatment, when distillation debris volume at the bottom of the still stops heating 1/5 the time, the residue in the still is discharged burning disposal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210236247 CN102718368B (en) | 2012-07-10 | 2012-07-10 | Method for treating high-concentration phenol-contained wastewater into easily-biochemically-treated wastewater |
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|---|---|---|---|
| CN 201210236247 CN102718368B (en) | 2012-07-10 | 2012-07-10 | Method for treating high-concentration phenol-contained wastewater into easily-biochemically-treated wastewater |
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| CN102718368A CN102718368A (en) | 2012-10-10 |
| CN102718368B true CN102718368B (en) | 2013-09-11 |
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| CN103241829B (en) * | 2013-05-20 | 2014-10-29 | 南通市争妍颜料化工有限公司 | Method for degrading phenolic wastewater under catalysis of graphene quantum dot/ferroferric oxide composite |
| CN109368936B (en) * | 2018-11-29 | 2021-08-31 | 仙桃绿怡环保科技有限公司 | Method for treating copper etching waste liquid |
| CN110723869B (en) * | 2019-10-09 | 2021-07-02 | 合肥停弦渡生物科技有限公司 | Improved Fenton sewage treatment method based on pre-oxidant |
| CN110723802A (en) * | 2019-10-09 | 2020-01-24 | 合肥停弦渡生物科技有限公司 | Improved HiPO based on pre-oxidantxDeep oxidation treatment method |
| CN113429048A (en) * | 2021-06-15 | 2021-09-24 | 中石化南京化工研究院有限公司 | Treatment method of acrylic acid wastewater |
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| NL8600723A (en) * | 1986-03-20 | 1987-10-16 | Pacques Bv | METHOD FOR PURIFYING WASTE WATER. |
| CN100408485C (en) * | 2006-09-27 | 2008-08-06 | 蓝星化工新材料股份有限公司无锡树脂厂 | Method of circulation utilizing phenol containing waste water in novolac epoxy preparing process |
| CN101628768A (en) * | 2009-08-07 | 2010-01-20 | 南京大学 | Pretreatment and recycling method of phenolic wastewater in production of basic purple dye |
| WO2012038466A1 (en) * | 2010-09-21 | 2012-03-29 | Novozymes A/S | Removal of selenocyanate or selenite from aqueous solutions |
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