CN104773896A - Organic wastewater treatment method - Google Patents

Organic wastewater treatment method Download PDF

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Publication number
CN104773896A
CN104773896A CN201410012127.5A CN201410012127A CN104773896A CN 104773896 A CN104773896 A CN 104773896A CN 201410012127 A CN201410012127 A CN 201410012127A CN 104773896 A CN104773896 A CN 104773896A
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China
Prior art keywords
oxidation
organic wastewater
treatment
waste water
solution
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Pending
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CN201410012127.5A
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Chinese (zh)
Inventor
王有喜
孙楠
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Triumphant General Chemical Science And Technology Ltd Of Zhengjiang City
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Triumphant General Chemical Science And Technology Ltd Of Zhengjiang City
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Priority to CN201410012127.5A priority Critical patent/CN104773896A/en
Publication of CN104773896A publication Critical patent/CN104773896A/en
Pending legal-status Critical Current

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Abstract

The present invention discloses an organic wastewater treatment method, which comprises: pouring organic wastewater into a stirring kettle having stirring; at a room temperature, adding a bleaching liquid containing calcium hypochlorite to carry out an advanced oxidation reaction, wherein the effective chlorine content in the bleaching liquid is 5-10%; determining the oxidation-reduction potential of the solution in the stirring kettle until the oxidation-reduction potential rises to a certain value, then suddenly descends and finally is not changed; and filtering the solution, and adding the filtrate to a biochemical pool to continuously carry out biological oxidation. The method of the present invention is the effective treatment method for treating the high concentration organic wastewater, wherein the calcium hypochlorite is adopted as the oxidant so as to generate the calcium salt, and the calcium salt precipitate can be directly removed through the filtration, such that advantages of convenience, efficiency and substantial reduction of the high concentration organic wastewater treatment cost are provided, and the oxidized filtrate can be directly subjected to the biological treatment.

Description

A kind of method for processing organic wastewater
Technical field
The present invention relates to field of industrial waste water treatment, be specifically related to a kind of High-concentration organic wastewater treatment method.
Background technology
The industries such as synthesis chemical industry, papermaking, agricultural chemicals, medicine, production process often produces some extra-high pollutents, high concentration, high viscosity organic waste water.This type of waste water characteristic: Pollutant levels are high, and (such as COD reaches 5 × 10 4~ 20 × 10 4mg/l), complicated, and each pollutent physical behavior is widely different, poisonous and harmful, biological degradability extreme difference (organic waste water principal character), and mass concentration is high, high (the mass concentration 10-20% of viscosity, similar edible oil or paint have certain viscous flow poor), this " three is high " causes existing conventional water treatment materialization, biochemical method and combination to be all difficult to process, let alone resource utilization is recycled.At present usual method of wastewater treatment is still continued to use for this type of waste water---degraded is removed, and common treatment process has.
Evaporation concentration, the such as iminodiacetic acid saliferous method of wastewater treatment of Chinese patent CN101863579A, Chinese patent CN101628769 device for high concentration waste water treatment, Chinese patent CN101152969 Production of Terephthalic Acid method of wastewater treatment, adopt and filter and filtrate is sent into multi-effect evaporation system evaporation process, concentrated solution adds Acid precipitation solid-liquid separation.First this type of waste water viscosity greatly cannot filtering separation, and secondly, multiple-effect evaporation ultimate principle be by multiple-effect evaporation, Crystallization Separation removal pollutent.Single vaporization concentrates, and not only running cost is extra-high, and mixing evaporation is unfavorable for that separating substances resource utilization is recycled, and this method does not also reach thorough process, and concentrated solution still needs otherwise processed.
Wet oxidation, oxidizing reaction is carried out under needing higher reaction temperatures and larger oxygen partial pressure condition, and not only high temperature, Keep Clear-High Voltage property are large, and running cost is also high, can not resource utilization recycle equally because adopting oxidative degradation; Secondly, this method is generally applicable to about concentration 4-6% sewage, and excessive concentration can affect oxidation and carry out; Besides, solid-liquid separation after reaction, still needs to carry out biological degradation process to parting liquid.
Multistage anaerobic-aerobic biochemical, not only processes floor space large, and belong to destructive process can not recycling, actual treatment is difficult to qualified discharge.
Absorption-evaporation process, such as Chinese patent CN101428926 adsorbs-evaporates integrated phloroglucinol wastewater non-waste-emission treatment process.Absorption method resin used is not general, different waste water selects resin difficulty large, and resin regeneration cost is high, and particularly contained by this type of waste water, contaminant molecule amount is large, viscosity is large, mass concentration is high, easy blocking resin, institute is in this way to the basic non-processor ability of such waste water.
Film process, the such as desalination of Chinese patent CN101139151 polyvinyl chloride technique wastewater and concentration method, adopt multi-stage reverse osmosis desalination, the vacuum-evaporation of condensed water triple effect.Chinese patent CN1850635, CN101117258 high alkalinity, high salt, high organic content epoxy resin waste-water treatment process, adopt: and neutralization, membrane filtration-40 ~ 70 DEG C of membrane distillation dehydrations are concentrated-and multiple-effect evaporation is concentrated into saturated or supersaturation-membrane filtration, crystallization.Contained by this type of waste water, contaminant molecule amount is large equally, and viscosity is large, and mass concentration is high, film cannot process at all, even if at low concentrations can treating part, but because non-selectivity is separated, isolate be lumped together, can not as self raw material high value recycling.
Burning disposal, such as Chinese patent CN101825285A salt-containing organic wastewater burning disposal, Chinese patent CN1300719 high concentrated organic wastewater burn cracking administering method.Burning disposal is only applicable to high heating value and the high waste water of mass concentration usually, but most of high density, high viscosity waste water, its calorific value might not be all very high, and water content is higher, and thus burning disposal consume fuel is many, and running cost is high, economy extreme difference; In addition burning disposal makes organic carbon, can not resource utilization recycle, and the organic waste water that burns besides also can produce Dioxins secondary pollution.
Hydrogen peroxide oxidation, hydrogen peroxide has stronger oxidisability under the katalysis of ferrous sulfate, but hydrogen peroxide concentration is poor lower than less than 50% oxidation susceptibility, and after hydrogen peroxide concentration is greater than 50%, runs into organic content Gao Shihui and to blast danger.
To sum up, existing treatment technology cost is high, and after process, chloride ion content is high, makes the organic waste water after processing can not enter the effect that biochemistry pool continues to clear up COD.Calcium salt after process high concentrated organic wastewater of the present invention mostly removes after sedimentation and filtration, and in solution, the calcium salt of residual minute quantity, has good cultivation effect to the formic acid bacterium in anaerobic pond.
Summary of the invention
The object of the invention is the treatment process of the organic waste water in order to provide a kind of good waste water treatment effect.
In order to reach object of the present invention, technical scheme is as follows:
A kind of method for processing organic wastewater, comprises the following steps:
1), organic waste water is poured into in the stirring tank stirred, under normal temperature, the bleaching liquor added again containing Losantin carries out advanced oxidation reaction, in described bleaching liquor, available chlorine content is 5% ~ 10%, measure the redox potential of solution in stirring tank, until redox potential rises to certain numerical value, then drops to and no longer change;
2), by solution filter, filtrate enters biochemistry pool and proceeds bio-oxidation.
Available chlorine, under just referring to hydrochloric acid effect, namely the content producing chlorine be available chlorine content.Organism in organic waste water and Losantin reaction can form low molecular organic acid calcium salt by oxidative cleavage, can precipitate, can remove easily after filtration.During the mensuration of on-line oxidation reduction potential instrument, its redox potential rises very fast, and when reaching home, redox potential can drop to suddenly and no longer change, and after now removing calcium salt after filtration, the COD of filtrate generally can drop to 1 × 10 3~ 3 × 10 3, residual organic calcium salt, can enter biochemistry pool and proceed bio-oxidation (anaerobism, hold concurrently oxygen and aerobic oxidation).Its organic calcium salt is the good substratum of anerobe.Have COD and well clear up effect.
The beneficial effect that the present invention has:
Hypochlorite oxidation, because of containing higher sodium salt during because producing clorox, the sodium salt after oxidation can make chloride ion content too high, is greater than about 10%, thus makes the organic waste water after process not enter biochemistry pool, continues to clear up COD effect.
With Losantin as oxygenant, can generate calcium salt, can directly remove after filtration, convenient, efficient, cost reduces greatly; By controlling available chlorine content, make to react rear Chlorine in Solution content low.Therefore, the filtrate after oxidation directly can carry out biochemical treatment.
Accompanying drawing explanation
Fig. 1 is treatment of Organic Wastewater schema of the present invention.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not only confined to embodiment.
As shown in Figure 1, a kind of method for processing organic wastewater, comprises the following steps:
1), organic waste water is poured into in the stirring tank stirred, under normal temperature, the bleaching liquor added again containing Losantin carries out advanced oxidation reaction, in described bleaching liquor, available chlorine content is 5% ~ 10%, measure the redox potential of solution in stirring tank, until redox potential rises to certain numerical value, then drops to and no longer change;
2), by solution filter, filtrate enters biochemistry pool and proceeds bio-oxidation.
Available chlorine, determines just to refer under hydrochloric acid effect, produces the content of chlorine.Organism in organic waste water and Losantin reaction meeting oxidative cleavage form low molecular organic acid calcium salt and precipitate, and can directly remove.During the mensuration of on-line oxidation reduction potential instrument, its redox potential rises very fast, and when reaching home, redox potential can drop to suddenly and no longer rise, and after now removing calcium salt after filtration, the COD of filtrate generally can drop to 1 × 10 3~ 3 × 10 3, biochemistry pool can be entered and proceed bio-oxidation (anaerobism, hold concurrently oxygen and aerobic oxidation).Its organic calcium salt is the good substratum of anerobe.Have COD and well clear up effect.
Last it is noted that above embodiment only in order to illustrate the present invention and and unrestricted technical scheme described in the invention, therefore, although this specification sheets with reference to each above-mentioned embodiment to present invention has been detailed description, but, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, and all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it all should be encompassed in right of the present invention.

Claims (1)

1. a method for processing organic wastewater, is characterized in that, comprises the following steps:
1), organic waste water is poured into in the stirring tank stirred, under normal temperature, the bleaching liquor added again containing Losantin carries out advanced oxidation reaction, in described bleaching liquor, available chlorine content is 5% ~ 10%, measure the redox potential of solution in stirring tank, until redox potential rises to certain numerical value, then drops to and no longer change;
2), by solution filter, filtrate enters biochemistry pool and proceeds bio-oxidation.
3) hypochlorite of alkaline-earth metal.Available chlorine content is 5% ~ 10%.
4) mother liquor of the oxymuriate/perchlorate of alkaline-earth metal, available chlorine content is 5% ~ 10%.
CN201410012127.5A 2014-01-10 2014-01-10 Organic wastewater treatment method Pending CN104773896A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007044612A (en) * 2005-08-09 2007-02-22 Hitachi Plant Technologies Ltd Apparatus for treating sludge
CN102583908A (en) * 2012-03-22 2012-07-18 南京工业大学 Landfill leachate treatment process
CN102616908A (en) * 2012-04-26 2012-08-01 苏州科羽电子技术服务有限公司 Production method for treating agent
CN103086497A (en) * 2011-10-28 2013-05-08 武汉科技大学 Method for realizing deep treatment of coking wastewater by utilizing calcium hypochlorite
CN103142193A (en) * 2013-03-14 2013-06-12 曹林冲 Simple self-cleaning mopping cart
CN103482796A (en) * 2013-10-11 2014-01-01 大唐国际化工技术研究院有限公司 Non-degradable organic wastewater treatment method and system thereof, and application of method and system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007044612A (en) * 2005-08-09 2007-02-22 Hitachi Plant Technologies Ltd Apparatus for treating sludge
CN103086497A (en) * 2011-10-28 2013-05-08 武汉科技大学 Method for realizing deep treatment of coking wastewater by utilizing calcium hypochlorite
CN102583908A (en) * 2012-03-22 2012-07-18 南京工业大学 Landfill leachate treatment process
CN102616908A (en) * 2012-04-26 2012-08-01 苏州科羽电子技术服务有限公司 Production method for treating agent
CN103142193A (en) * 2013-03-14 2013-06-12 曹林冲 Simple self-cleaning mopping cart
CN103482796A (en) * 2013-10-11 2014-01-01 大唐国际化工技术研究院有限公司 Non-degradable organic wastewater treatment method and system thereof, and application of method and system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘书: "氧化剂预处理垃圾渗滤液的研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》 *

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Application publication date: 20150715

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