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Method for treating degradation-resistant industrial wastewater

An industrial wastewater, refractory technology, applied in sedimentation treatment, special treatment targets, water/sewage treatment and other directions, can solve the problems of high treatment cost of powder activated carbon, difficult to guarantee regeneration effect, high cost per ton of water treatment, and achieve good application prospects , The effect of economical operation cost and high comprehensive efficiency

Inactive Publication Date: 2020-01-10
CITIC ENVIROTECH GUANGZHOU CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the COD concentration is high, the cost of powder activated carbon treatment is high, and the saturated powder activated carbon is hazardous waste, and the cost of per ton of water treatment is high
However, the regeneration cost of the granular activated carbon bed process after adsorption saturation is relatively high, and the regeneration effect is difficult to guarantee.

Method used

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  • Method for treating degradation-resistant industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Take the MBR effluent of a sewage treatment plant in an industrial park for continuous treatment experiments, the influent flow rate is 1L / h, COD: 200mg / L.

[0082]The waste water enters the adsorption pond, the concentration of powdered activated carbon in the adsorption pond is 1500 mg / L, and the reaction time of the waste water in the adsorption pond is 15 minutes. Detect the COD of the effluent from the adsorption pool: 40mg / L.

[0083] The effluent from the adsorption pool flows into the MCR pool by itself, and is filtered by the built-in submerged hollow membrane module. The COD of the effluent from the MCR pool is further reduced, and the COD: 36mg / L. The residence time of wastewater in the MCR tank is 30min, and the concentration of powdered activated carbon is 5000mg / L. After the wastewater is treated by the MCR pool, the COD reaches the discharge standard.

[0084] In the MCR pool, the mixed solution of powdered activated carbon with an inflow rate of 30% is...

Embodiment 2

[0088] Take the MBR effluent of a sewage treatment plant in an industrial park for continuous treatment experiments, the influent flow rate is 1L / h, COD: 83mg / L.

[0089] The waste water enters the adsorption pond, the concentration of powdered activated carbon in the adsorption pond is 500 mg / L, and the reaction time of the waste water in the adsorption pond is 15 minutes. Detect the COD of the effluent from the adsorption pool: 25mg / L.

[0090] The effluent from the adsorption pool flows into the MCR pool by itself, and is filtered by the built-in submerged hollow membrane module. The COD of the effluent from the MCR pool is further reduced, and the COD: 23mg / L. The residence time of wastewater in the MCR tank is 30min, and the concentration of powdered activated carbon is 4000mg / L. After the wastewater is treated by the MCR tank, the COD reaches the Class IV water standard of the surface water environmental quality standard (CB3838-2002).

[0091] In the MCR pool, the mix...

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Abstract

The invention discloses a method for treating degradation-resistant industrial wastewater. The treatment method comprises the following steps: 1) introducing the degradation-resistant industrial wastewater into an adsorption tank, and carrying out adsorption treatment by using powdered activated carbon; 2) introducing the effluent of the adsorption tank into an MCR tank, performing treatment, anddischarging the treated wastewater; 3) introducing the powdered activated carbon mixed solution in the MCR tank into an electrolytic reaction tank, and carrying out electrochemical oxidation treatment; and 4) introducing the effluent of the electrolytic reaction tank into a precipitation tank, settling the effluent, discharging the supernatant of the precipitation tank, and returning the regenerated powdered activated carbon at the bottom of the precipitation tank to the adsorption tank in step 1) for recycling. The method which combines the MCR and electrochemical oxidation to achieve advanced treatment of the degradation-resistant industrial wastewater has the advantages of high electrolytic regeneration comprehensive efficiency of the powdered activated carbon, high efficiency in removal of pollutants in the degradation-resistant wastewater, ensuring of standard reaching of the effluent of a sewage plant, low operation cost and good application prospect.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a method for treating refractory industrial wastewater. Background technique [0002] Sewage discharged from industrial parks generally has the characteristics of complex water quality, high salt content, high non-biodegradable COD (chemical oxygen demand), and high chroma. It is difficult for industrial wastewater to achieve increasingly stringent COD, ammonia nitrogen, total nitrogen, and Therefore, most industry industrial park sewage treatment plants often adopt the treatment process of pretreatment + biochemistry + advanced oxidation. The advanced oxidation process is commonly used in the back end of biochemical effluent to further oxidize and remove non-biodegradable pollutants in wastewater. Commonly used advanced oxidation processes include Fenton, ozone, electrochemical oxidation, etc. [0003] The removal of pollutants by advanced o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F9/14
CPCC02F1/283C02F1/444C02F1/4672C02F3/00C02F9/00C02F2001/007C02F2303/16
Inventor 武斌张劲松刘建林汤显威
Owner CITIC ENVIROTECH GUANGZHOU CO LTD
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