Zero-discharge reusing treatment method for organic waste liquid

A technology of organic waste liquid and treatment method, applied in filtration treatment, precipitation treatment, multi-stage water treatment, etc., can solve the problems of clogging incinerators and evaporators, easy clogging of main reactors, and high equipment investment, so as to reduce investment and operation. Cost, significant economic benefits, high removal efficiency

Inactive Publication Date: 2017-10-10
SINGAPORE SUZHOU IND PARK ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The main reactor is easy to block
Due to the presence of low melting point salts, it will block the incinerator and evaporator;
[0005] 2) High equipment investment
High-salt organic waste liquid is easy to corrode equipment. If expensive titanium alloy is used, the equipment investment will be high;
[0006] 3) Secondary pollution problem
[0007] 4) High energy consumption

Method used

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  • Zero-discharge reusing treatment method for organic waste liquid

Examples

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Effect test

Embodiment 1

[0038] A high-concentration organic waste liquid in an electronics industry, COD is above 20,000mg / L, and the organic waste liquid contains high-concentration copper ions, fluoride ions and chloride ions. This zero-emission treatment method is adopted:

[0039] (1) Firstly, after primary and secondary coagulation and sedimentation pretreatment, the pH value is generally controlled at 8 to 10. The coagulants used include lime, PAC (polyaluminum chloride), PAM (polyacrylamide), and secondary The coagulant used in coagulation and sedimentation includes recapture agent, PAC, PAM; the lime is water lime, adjusted to about 5% with water; the dosage of lime is 200-500mg / L, and the dosage of PAC is 0.5-5.0mg / L , the dosage of PAM is 0.5~1.0mg / L;

[0040] (2) The effluent of coagulation and precipitation is evaporated and concentrated, and the device used is a thin film drying device, and the supporting devices include a spray tower and a condensed water tank;

[0041] (3) After evapo...

Embodiment 2

[0045] A high-concentration organic waste liquid in a pharmaceutical industry has a COD of 30,000-100,000 mg / L. The organic waste liquid contains high-concentration salt ions. This zero-emission treatment method is adopted:

[0046] (1) After coagulation and sedimentation pretreatment, the pH value is generally controlled at 8 to 10. The coagulants used include recapture agents, PAC, and PAM to remove some organic pollutants and salts; recapture agent dosage 200~500mg / L, PAC dosage 0.5~5.0mg / L, PAM dosage 0.5~1.0mg / L;

[0047] (2) The effluent of coagulation and precipitation is evaporated and concentrated, and the device used is a thin film drying device, and the supporting devices include a spray tower and a condensed water tank;

[0048] (3) After evaporation and concentration, advanced oxidation treatment is adopted, and the advanced oxidation method mainly adopts Fenton oxidation device; Fenton oxidation adopts sulfuric acid to adjust the pH value, and the pH is 4 to 6; t...

Embodiment 3

[0052] A petrochemical industry has high-concentration organic waste liquid, COD is above 20,000 mg / L, and the organic waste liquid contains high-concentration fluoride ions. This zero-emission treatment method is adopted:

[0053] (1) Firstly, after coagulation and sedimentation pretreatment, the pH value is generally controlled at 8 to 10, and the coagulants used include lime, PAC, and PAM; the lime is water lime, which is adjusted to about 5% with water; the dosage of lime is 200 ~500mg / L, PAC dosage 0.5~5.0mg / L, PAM dosage 0.5~1.0mg / L;

[0054] (2) The effluent of coagulation and precipitation is evaporated and concentrated, and the device used is a thin film drying device, and the supporting devices include a spray tower and a condensed water tank;

[0055] (3) After evaporation and concentration, advanced oxidation treatment is adopted, and the advanced oxidation method mainly adopts wet oxidation method; the reaction temperature is 180-280 degrees;

[0056] (4) Subsequen...

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Abstract

The invention belongs to the technical field of environmental protection, and relates to a zero-discharge reuse treatment method for organic waste liquid. The steps include coagulation precipitation, evaporation concentration, advanced oxidation, A/O process, MBR process and advanced treatment. The invention realizes the zero discharge of the organic waste liquid, avoids the influence of waste water discharge on the environment, and the organic waste liquid can reach the recycling standard after being treated, thus saving a lot of water sources.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a zero-discharge recycling treatment method for organic waste liquid that can efficiently utilize water resources. Background technique [0002] In recent years, with the rapid development of petrochemical, printing and dyeing, coking and other industries, various organic waste liquids containing a large amount of refractory organic pollutants have increased correspondingly. Their treatment costs are high, and if they are not properly treated, they will cause serious pollution to the environment if they enter the water. . The general treatment methods for these organic waste liquids cannot meet the requirements of purification treatment. Wastewater zero discharge means that after industrial water is reused, this part of the salt content and pollutants are highly concentrated into wastewater (more than 99%), which is recycled and reused, and no waste liquid is di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/001C02F1/04C02F1/32C02F1/441C02F1/5245C02F1/56C02F1/72C02F1/722C02F1/725C02F3/00C02F3/308C02F2001/007C02F2209/08C02F2301/08
Inventor 金月清
Owner SINGAPORE SUZHOU IND PARK ENVIRONMENTAL PROTECTION TECH CO LTD
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