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A resource treatment system and treatment method for high-salt and high-organic chemical wastewater

A technology for chemical wastewater and treatment systems, applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc. Recycling and other issues, to reduce energy consumption, increase sludge concentration and sludge residence time, and maintain the effect of microbial biomass

Active Publication Date: 2019-08-09
JIANGSU LASON CHEM ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is conducive to the resource utilization of salt, but this technology does not mention that the waste water has not been realized as a resource, and at the same time, the energy consumption is high during application, so it cannot be widely used
[0005] At present, in the recycling process of chemical wastewater treatment, most of them are partial recycling, water recycling or salt recycling. The problem of resource utilization is that the complete resource utilization of this type of wastewater has not been realized, and the salt or water resources in the wastewater are wasted. However, the use of appropriate technology and equipment to realize the resource utilization of salt and water in high-salt and high-organic-matter wastewater is harmful to an enterprise. Said to have far-reaching influence and social benefits

Method used

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  • A resource treatment system and treatment method for high-salt and high-organic chemical wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The water quality characteristics of the high-salt and high-organic chemical wastewater that needs to be treated are: wastewater pH5.4, conductivity 50mS / cm, COD Cr 15000mg / L, Na + 43000mg / L, NH 4 + -N 300mg / L, Cl - 60000mg / L, SO 4 2- 7000mg / L.

[0036] The electrocatalytic oxidation plate used is a titanium plate for the cathode, and a titanium-based chlorine analysis plate for the anode; the MBR membrane used is a flat membrane with a pore size of 0.1-0.2 μm; the electrodialysis membrane used is a homogeneous membrane; the ultrafiltration membrane used The membrane is a polyamide roll-type membrane module with a molecular weight cut-off of 50,000Da; the RO membrane used is an acetate roll-type membrane module.

[0037] The specific operation steps are as follows:

[0038] (1) Electrocatalytic oxidation: High-salt and high-organic chemical wastewater is pumped into the electrocatalytic oxidation water inlet for electrocatalytic oxidation treatment.

[0039] (2)...

Embodiment 2

[0048] The water quality characteristics of the high-salt and high-organic chemical wastewater that needs to be treated are: wastewater pH6.4, conductivity 50mS / cm, COD Cr 10000mg / L, Na + 36000mg / L, NH 4 + -N 300mg / L, Cl - 3900mg / L, SO 4 2- 67000mg / L.

[0049] The electrocatalytic oxidation plate used is a titanium plate for the cathode, and a titanium-based oxygen evolution plate for the anode; the MBR membrane used is a flat membrane with a pore size of 0.1-0.2 μm; the electrodialysis membrane used is a homogeneous membrane; the ultrafiltration membrane used The membrane is a polyamide roll-type membrane module with a molecular weight cut-off of 50,000Da; the RO membrane used is an acetate roll-type membrane module.

[0050] Concrete operation steps are identical with embodiment 1.

[0051] During operation, the operating conditions of the electrocatalytic oxidation unit are: the pH of the wastewater influent is 5.4, the pH of the wastewater is maintained between 4 an...

Embodiment 3

[0055] The water quality characteristics of the high-salt and high-organic chemical wastewater that needs to be treated are: wastewater pH 3.4, conductivity 100mS / cm, COD Cr 20000mg / L, Na + 72000mg / L, NH 4 + -N 500mg / L, Cl - 60000mg / L, SO 4 2- 68000mg / L.

[0056] The electrocatalytic oxidation plate used is a titanium plate for the cathode, and a titanium-based oxygen evolution plate for the anode; the MBR membrane used is a flat membrane with a pore size of 0.1-0.2 μm; the electrodialysis membrane used is a homogeneous membrane; the ultrafiltration membrane used The membrane is a polyamide roll-type membrane module with a molecular weight cut-off of 50,000 Da; the RO membrane used is an acetate roll-type membrane module.

[0057] Concrete operation steps are identical with embodiment 1.

[0058] During operation, the operating conditions of the electrocatalytic oxidation unit are: the pH of the wastewater inflow is 5.4, the pH of the wastewater is maintained between 4 ...

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Abstract

The invention discloses a recycling treatment system of high-salinity high-organic-matter chemical wastewater. The recycling treatment system comprises an electrocatalytic oxidation device, a halotolerant bacteria biochemical system, an MBR aerobic device, an electroosmosis unit, an ultrafilter and an RO unit, the halotolerant bacteria biochemical system comprises a halotolerant bacteria anaerobic device, a halotolerant bacteria aerobic device and a halotolerant biological aerated filter. The invention further discloses a treatment method of the high-salinity high-organic-matter chemical wastewater. By the recycling treatment system and the treatment method, the problem of recycling treatment of the high-salinity high-organic-matter chemical wastewater is solved effectively, recycling rate of water and salt is high, no wastewater is discharged basically, no solid waste is generated, generated water is high in quality, generated salt is high in purity, and water resources and salt in the high-salinity high-organic-matter chemical wastewater are recycled to greatest extent; zero discharging of wastewater in the process of enterprise production is realized, and the recycling treatment system and the treatment method have important environment benefit.

Description

technical field [0001] The invention belongs to the field of industrial waste water treatment, and specifically refers to a resource treatment system and a treatment method for high-salt and high-organic chemical waste water. Background technique [0002] In the production process of the chemical industry, acids and bases such as hydrochloric acid, sulfuric acid, sodium hydroxide, and nitric acid are often used, as well as related salts such as sodium sulfate, sodium chloride, and sodium nitrate. Therefore, the main characteristics of chemical wastewater are: high salt (mass fraction is 3%~30%), high organic matter (COD>10000mg / L). The treatment of this kind of wastewater is often to reduce the salt content of the wastewater by dilution. The discharge of the wastewater with reduced salt content will not only cause the deterioration of the environment, but also lead to the salinization of the soil and watershed. In addition, the organic matter in wastewater often contains...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/441C02F1/444C02F1/4672C02F1/4693C02F1/66C02F3/30C02F9/00C02F2101/30C02F2301/08
Inventor 蒋伟群王帅
Owner JIANGSU LASON CHEM ENVIRONMENTAL PROTECTION
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