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Treatment process for near-zero discharge of industrial wastewater

A treatment process and near-zero discharge technology, applied in water/sewage treatment, oxidized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve problems such as incomplete wastewater treatment, affecting human health, and environmental pollution of wastewater. Achieve the effects of saving dosage, prolonging residence time and avoiding environmental pollution

Inactive Publication Date: 2018-10-12
BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Wastewater treatment is the use of physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater recycling and reuse, making full use of water resources. With the rise of industry, various factories and chemical plants are becoming more and more More, although people's living standards have been improved, the wastewater discharged from these factories will cause serious environmental pollution and seriously affect people's health. The general purification device is only through simple filtration and impurity removal. If it is not thorough, it will still cause environmental pollution

Method used

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  • Treatment process for near-zero discharge of industrial wastewater

Examples

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Effect test

Embodiment 1

[0022] The wastewater from a coking plant after three-stage treatment has a COD of 50mg / L and a hardness of 1.5mmol / L. First, it passes through an ultrafiltration system to remove part of the suspended solids and macromolecular colloids. The ultrafiltration effluent has a COD of 30mg / L and a hardness of 1.5mmol. / L, and then enter the reverse osmosis system to reuse the desalted water, the water production rate is 80%, the concentrated water COD is 150mg / L, and the hardness is 7.5mmol / L. / L soda ash, the hardness of the effluent is reduced to 0.8mmol / L, the effluent is filtered by a multi-media to remove suspended solids in the wastewater, and then enters the cation exchange resin softening system, the hardness of the effluent is reduced to 0.04mmol / L, and the effluent enters the ozone catalytic oxidation unit for ozone oxidation The effect is to mineralize part of the organic matter, the ozone catalytic oxidation is filled with KLCO-3 catalyst, the hydraulic retention time is ...

Embodiment 2

[0024] The wastewater from a coal chemical plant after three-stage treatment has a COD of 60mg / L and a hardness of 2mmol / L. First, it passes through an ultrafiltration system to remove part of the suspended solids and macromolecular colloids. The ultrafiltration effluent has a COD of 40mg / L and a hardness of 2mmol / L. , and then enter the reverse osmosis system to reuse the desalted water, the water production rate is 80%, the concentrated water COD is 200mg / L, and the hardness is 10mmol / L. , the hardness of the effluent is reduced to 0.7mmol / L, the effluent is filtered by multimedia to remove the suspended solids in the wastewater, and enters the cation exchange resin softening system, the hardness of the effluent is reduced to 0.04mmol / L, and the effluent enters the ozone catalytic oxidation unit to oxidize some Organic matter mineralization, ozone catalytic oxidation, KLCO-3 catalyst is loaded, the hydraulic retention time is 1.5h, the ozone dosage is 200mg / L, the COD is redu...

Embodiment 3

[0026] The wastewater from a coal chemical plant after three-stage treatment has a COD of 70mg / L and a hardness of 2.5mmol / L. First, the ultrafiltration system removes part of the suspended solids and macromolecular colloids. The ultrafiltration effluent has a COD of 50mg / L and a hardness of 2.5mmol. / L, and then enter the reverse osmosis system to reuse the desalted water, the water production rate is 80%, the concentrated water COD is 250mg / L, and the hardness is 12.5mmol / L. / L soda ash, the hardness of the effluent is reduced to 0.8mmol / L, the effluent is filtered by a multi-media to remove suspended solids in the wastewater, and then enters the cation exchange resin softening system, the hardness of the effluent is reduced to 0.04mmol / L, and the effluent enters the ozone catalytic oxidation unit for ozone oxidation The effect is to mineralize part of the organic matter, ozone catalytic oxidation is loaded with KLCO-3 catalyst, the hydraulic retention time is 2h, the dosage ...

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Abstract

The invention discloses a treatment process for near-zero discharge of industrial wastewater; according to the process, a part of suspended substances and macromolecular colloids are removed from thewastewater by an ultrafiltration system, then the wastewater enters a primary reverse osmosis system and is desalted, and produced water is reused; the obtained concentrated water is softened by a medicament, then enters multiple media and has the suspended substances in the wastewater filtered and removed, and effluent enters cation exchange resin and is softened; after the hardness is reduced, the effluent enters an ozone catalytic oxidation unit, and a part of organic matters are mineralized; the effluent enters a primary activated carbon adsorption unit, has the content of organic mattersreduced and then is subjected to high pressure reverse osmosis desalination; produced water is subjected to primary reverse osmosis deep desalination, concentrated water enters a secondary activated carbon adsorption unit and is treated, and effluent is up to standard and is discharged; powered activated carbon and the produced water are separated by a membrane separation way, the residence time of activated carbon in a pool is prolonged, the adsorption capacity of activated carbon to the organic matters is increased by 30% compared with a one-off stirring and mixing reaction pool, and the activated carbon flows from low-concentration wastewater to high-concentration wastewater, the adsorption capacity of the activated carbon is fully utilized, the addition amount is saved and the cost isreduced.

Description

technical field [0001] The invention relates to the field of advanced treatment of industrial wastewater, in particular to a treatment process for near-zero discharge of industrial wastewater. Background technique [0002] Wastewater treatment is the use of physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater recycling and reuse, making full use of water resources. With the rise of industry, various factories and chemical plants are becoming more and more More, although people's living standards have been improved, the wastewater discharged from these factories will cause serious environmental pollution and seriously affect people's health. The general purification device is only through simple filtration and impurity removal. If it is not thorough, it will still cause environmental pollution. Contents of the invention [0003] In view of the above technical problems, the present invention provides a tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/001C02F1/283C02F1/42C02F1/441C02F1/444C02F1/68C02F1/725C02F1/78C02F5/00C02F5/02C02F5/06C02F9/00C02F2001/425C02F2101/30Y02A20/131
Inventor 李海波王靖宇刘亚丽韦凤密
Owner BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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