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Industrial sewage treatment method

A treatment method and technology for industrial sewage, applied in water/sewage treatment, flotation water/sewage treatment, light water/sewage treatment, etc., can solve the problem of inability to treat industrial sewage with heavy metal content, expensive operation cost, long standing time, etc. problems, to achieve the effect of improving coagulation efficiency, accelerating sedimentation rate and reducing pollution degree

Active Publication Date: 2018-08-03
工大环境股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, industrial sewage treatment mainly uses physical methods, chemical methods and biological methods; physical methods include multi-effect evaporation, ionization, reverse osmosis, ultrafiltration, nanofiltration, etc., which require a large amount of power resources and are expensive to operate; chemical The method usually adds polymer oxidants and chemical flocculants to the water, which has the disadvantages of large dosage, long standing time, and secondary pollution; the biochemical method has the advantages of stability and low cost in domestic sewage treatment, but it cannot handle Industrial wastewater with high heavy metal content, high organic concentration and high salt

Method used

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Examples

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Effect test

Embodiment 1

[0039]A kind of industrial sewage treatment method, its steps are as follows:

[0040] (1) Mechanical treatment: filter industrial sewage through mechanical grille, and the filtered effluent enters the oil-water separator to remove sundries, oil slicks and suspended solids;

[0041] (2) softening treatment: the effluent of the oil-water separator is passed into the chemical reactor, adding soda ash, stirring and mixing, making the pH value 8, removing hardness ions such as calcium and magnesium to soften the water body, and simultaneously reacting to generate suspended floc particles;

[0042] (3) Enhanced coagulation: the effluent after softening treatment is passed into the coagulation air flotation machine, and cationic flocculant is added at 0.1kg per ton of water to drive away grease, colloid, suspended solids and suspended floc particles generated in step (2) , reduce the BOD and COD content in sewage;

[0043] (4) Pulse discharge plasma-photocatalytic synergistic degra...

Embodiment 2

[0055] A kind of industrial sewage treatment method, its steps are as follows:

[0056] (1) Mechanical treatment: filter industrial sewage through mechanical grille, and the filtered effluent enters the oil-water separator to remove sundries, oil slicks and suspended solids;

[0057] (2) softening treatment: the effluent of the oil-water separator is passed into the chemical reactor, adding soda ash, stirring and mixing, making the pH value 9, removing hardness ions such as calcium and magnesium to soften the water body, and simultaneously reacting to generate suspended floc particles;

[0058] (3) Enhanced coagulation: the effluent after softening treatment is passed into the coagulation air flotation machine, and cationic flocculant is added at 0.2kg per ton of water to drive away grease, colloid, suspended solids and suspended floc particles generated in step (2) , reduce the BOD and COD content in sewage;

[0059] (4) Pulse discharge plasma-photocatalytic synergistic degr...

Embodiment 3

[0071] A kind of industrial sewage treatment method, its steps are as follows:

[0072] (1) Mechanical treatment: filter industrial sewage through mechanical grille, and the filtered effluent enters the oil-water separator to remove sundries, oil slicks and suspended solids;

[0073] (2) Softening treatment: the effluent of the oil-water separator is passed into the chemical reactor, adding soda ash, stirring and mixing, so that the pH range is 11, removing hardness ions such as calcium and magnesium to soften the water body, and simultaneously reacting to form suspended floc particles;

[0074] (3) Enhanced coagulation: the effluent after softening treatment is passed into the coagulation air flotation machine, and cationic flocculant is added at 0.3kg per ton of water to drive away grease, colloid, suspended solids and suspended floc particles generated in step (2) , reduce the BOD and COD content in sewage;

[0075] (4) Pulse discharge plasma-photocatalytic synergistic deg...

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Abstract

The invention provides an industrial sewage treatment method, which comprises the following steps of (1) mechanical treatment; (2) softening treatment; (3) reinforced coagulation; (4) pulse discharging plasma-photocatalysis cooperated degradation of organic matters; (4) ultrasound cooperated nanometer zero-valent iron treatment; (6) iron wire cage framework cellulose aerogel adsorption; (7) ultrafiltration / nanofiltration-reverse osmosis integrated film method treatment. The industrial sewage treatment method provided by the invention has the advantages that the process is simple; the operationperiod is short; contaminants such as suspended matters, organic matters and salts contained in the industrial sewage can be thoroughly removed; a good removal effect can be achieved on various kindsof continuous organic contaminants and heavy metal; in addition, the commonality is realized on the contaminant removal; the heavy metal recovery rate is high; the economic benefits are good; the process flexibility is high; the anti-impact load capability is high; the sewage recovery rate is high; the method is applicable to the sewage treatment in various fields of electric power, photovoltaics, photoelectricity, semi-conductors, electrics, pharmacy, metallurgy, petrochemical engineering and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an industrial sewage treatment method. Background technique [0002] The composition of industrial sewage is complex. If these pollutants are not treated and discharged directly into the environment, it will cause great harm to land and water pollution. Persistent organic pollutants (POPs) refer to long-distance migration through various environmental media (atmosphere, water, organisms, etc.) Natural or synthetic organic pollutants that pose serious hazards to human health and the environment. In view of the characteristics of high toxicity, persistence, accumulation and high fluidity of persistent organic pollutants, it has become a research hotspot in recent years to study how to completely degrade them in sewage treatment without generating new pollutants. [0003] The water quality of industrial sewage is complex, and usually has the characteristics of high suspen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F101/30C02F101/20
CPCC02F1/001C02F1/24C02F1/286C02F1/30C02F1/36C02F1/40C02F1/441C02F1/442C02F1/444C02F1/488C02F1/56C02F1/70C02F5/02C02F9/00C02F2101/20C02F2101/30C02F2303/04C02F2303/06C02F2305/10
Inventor 许欠欠
Owner 工大环境股份有限公司
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