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Technology for removing organic matters in reverse osmosis concentrated water

A technology for reverse osmosis concentrated water and organic matter, which is applied in the fields of water pollutants, water/sewage treatment, water/sewage multi-stage treatment, etc. The effect of strong operability, simple equipment and good market prospects

Inactive Publication Date: 2018-10-16
BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of the up-to-standard discharge and further recycling of reverse osmosis concentrated water, it is necessary to reduce the content of organic matter in reverse osmosis concentrated water, but these organic matter content is high, degradation is difficult, removal efficiency is low, and energy consumption is high.

Method used

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  • Technology for removing organic matters in reverse osmosis concentrated water

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The COD of reverse osmosis concentrated water in a coking plant is 170mg / L. The wastewater first enters the composite oxidation tower, the hydraulic retention time is 0.5h, the dosage of ozone is 200mg / L, and the dosage of hydrogen peroxide is 200mg / L. Wastewater COD is reduced to 100mg / L, the effluent enters the activated carbon adsorption tower, the amount of activated carbon filled in the adsorption tower is 10% of the influent, the residence time of the adsorption tower is 30min, the COD of the effluent of the adsorption tower is reduced to 50mg / L, and the activated carbon in the adsorption tower is regenerated The regeneration solvent used is methanol, the regeneration time is 60 minutes, and the activated carbon can be recycled for more than 30 times.

Embodiment 2

[0031] The COD of reverse osmosis concentrated water in a coal chemical plant is 230mg / L. The wastewater first enters the composite oxidation tower, the hydraulic retention time is 1.5h, the dosage of ozone is 350mg / L, and the dosage of hydrogen peroxide is 400mg / L. After composite oxidation Wastewater COD is reduced to 120mg / L, the effluent enters the activated carbon adsorption tower, the amount of activated carbon filled in the adsorption tower is 15% of the influent, the residence time of the adsorption tower is 60min, the COD of the effluent of the adsorption tower is reduced to 60mg / L, and the activated carbon in the adsorption tower is regenerated The regeneration solvent used is ethanol, the regeneration time is 90 minutes, and the activated carbon can be recycled for more than 30 times.

Embodiment 3

[0033] The COD of reverse osmosis concentrated water in a paper mill is 280mg / L. The wastewater first enters the composite oxidation tower, the hydraulic retention time is 2.5h, the dosage of ozone is 500mg / L, and the dosage of hydrogen peroxide is 450mg / L. After composite oxidation Wastewater COD is reduced to 140mg / L, the effluent enters the activated carbon adsorption tower, the amount of activated carbon filled in the adsorption tower is 20% of the influent, the residence time of the adsorption tower is 90min, the COD of the effluent of the adsorption tower is reduced to 70mg / L, and the activated carbon in the adsorption tower is regenerated The regeneration solvent used is acetone, the regeneration time is 120min, and the activated carbon can be recycled more than 30 times.

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Abstract

The invention discloses a technology for removing organic matters in reverse osmosis concentrated water. The technology is characterized in that one part of organic matter is mineralized and removed by oxidization reaction, and then the organic matter is further removed by adsorption via activated carbon. The technology has the advantages that one part of organic matter is mineralized and removedby the composite oxidization type, and then the organic matter is further removed by adsorption via activated carbon, so that the organic pollutants in the wastewater can be effectively removed, the wastewater can be drained after the wastewater reaches standard, and the content of COD (chemical oxygen demand) in drained water is lower than 80mg / L; meanwhile, the activated carbon after adsorptioncan be regenerated by an organic solvent, and be recycled, so that the cost is reduced; both of environmental benefit and economic benefit can be realized.

Description

technical field [0001] The invention relates to the field of advanced treatment of industrial wastewater, in particular to a process for removing organic matter in reverse osmosis concentrated water. Background technique [0002] As a water treatment process, reverse osmosis technology is widely used in wastewater reuse, seawater and brackish water desalination, pure water preparation and other fields. In the field of wastewater reuse, the reverse osmosis membrane converts 75% to 85% of the feed water into reuse water. At the same time, all the intercepted substances are concentrated in the concentrated water with 15% to 25% of the feed water. The pollutants in the concentrated water The concentration is about 4-6 times the concentration of pollutants in the influent. The main characteristics of reverse osmosis concentrated water are high salinity, high content of organic matter, and poor biodegradability. At present, domestic and foreign treatment methods for reverse osmo...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/30
CPCC02F1/283C02F1/722C02F1/78C02F2101/30
Inventor 李海波王靖宇刘亚丽
Owner BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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