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Wastewater treatment method through cascading utilization of powdered activated carbon

A technology of powder activated carbon and treatment method, which is applied in water/sewage treatment, water treatment parameter control, special compound water treatment, etc. It can solve the problems of underutilization of activated carbon, insignificant treatment effect and high treatment cost, and achieve a good market Foreground, improved processing effect, simple process effect

Active Publication Date: 2017-09-15
徐州赛科康仑智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to its excellent pore structure, strong adsorption and decolorization capabilities, powdered activated carbon is widely used in various sections of the sewage treatment system, and can be added to the pretreatment, biochemical treatment, coagulation treatment or terminal treatment of wastewater treatment, etc. The removal of COD and chroma in wastewater has a good treatment effect, but the dosing of powdered activated carbon is usually a one-time dosing, which is discarded after one use. It is usually difficult to achieve adsorption saturation under normal circumstances, and the adsorption capacity of activated carbon has not been obtained. Fully utilized and discarded, the processing cost is high, and the processing effect is not significant

Method used

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  • Wastewater treatment method through cascading utilization of powdered activated carbon

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Embodiment 1

[0029] The treatment process of ammonia distillation wastewater in a coking plant is: anaerobic-anoxic-aerobic-coagulation-ozone catalytic oxidation, in which the COD of ammonia distillation raw water, biochemical effluent, coagulation effluent, and ozone catalytic oxidation effluent are 5120, 220, 141 respectively , 76mg / L, first add powdered activated carbon to the ozone catalytic oxidation effluent, the dosage is 2000mg / L, the activated carbon precipitation slurry is added in the second stage of the coagulation section, and the coagulated and precipitated activated carbon slurry is added to the raw ammonia distilled water for pretreatment , The pretreated activated carbon precipitation slurry is added to the biochemical aerobic section, and the effluent of each section: pretreatment effluent, biochemical effluent, coagulation effluent, and terminal effluent COD are respectively reduced to 4030, 182, 91, and 40mg / L.

Embodiment 2

[0031] The ammonia distillation raw water treatment process of a coking plant is: anoxic-aerobic-coagulation-Fenton oxidation, in which ammonia distillation raw water, biochemical effluent, coagulation effluent, and Fenton oxidation effluent COD are 6230, 283, 176, 105mg / L, add powdered activated carbon to the Fenton oxidation effluent first, the dosage is 3000mg / L, the activated carbon precipitation slurry is added in the second stage of the coagulation section, and the coagulated and precipitated activated carbon slurry is added to the raw ammonia distilled water for pretreatment. The activated carbon precipitation slurry is added to the biochemical aerobic section, and the effluent of each section: pretreatment effluent, biochemical effluent, coagulation effluent, and terminal effluent COD are respectively reduced to 4510, 205, 95, and 42mg / L.

Embodiment 3

[0033] The wastewater treatment process of a coal chemical plant area is: anoxic-aerobic-coagulation-ozone catalytic oxidation, in which the COD of raw water, biochemical effluent, coagulation effluent, and ozone catalytic oxidation effluent is 8150, 351, 220, 150mg / L, and the points will be The powdered activated carbon is first added to the ozone catalytic oxidation effluent, the dosage is 5000mg / L, the activated carbon precipitation slurry is added in the second stage of the coagulation section, and the coagulated and precipitated activated carbon slurry is added to the ammonia distilled raw water for pretreatment, and the activated carbon precipitation slurry is pretreated Added to the biochemical aerobic section, the effluent of each section: pretreatment effluent, biochemical effluent, coagulation effluent, and terminal effluent COD were reduced to 5740, 210, 102, and 40mg / L respectively.

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Abstract

The invention discloses awastewater treatment method through cascading utilization of powdered activated carbon. According to the method, concentrations of wastewater subjected to absorption treatmentbythe powdered activated carbon are from low to high, a multistagereverseabsorption mode is adopted, the powdered activated carbon is firstly added into discharged water subjected to advanced oxidation treatment, activated carbonslurry subjected to adsorption precipitation returns to a coagulation treatment system, the activated carbonslurry and a coagulant are separately added and precipitated, the precipitated activated carbonslurry returns a pretreatment system to absorb organic pollutants, finally the precipitated activated carbonslurry flows to biochemical treatment systemaerobic tank, and discharge water from the biochemical treatment system enters the coagulation treatment system. The method realizes the cascading utilization of activated carbon through a multistagereverseabsorption mode, enhances the treatment efficiencies of all technical systems while effectively utilizing the adsorption capacity of activated carbon, obviously improves the treatment effect, and has a good market prospect.

Description

technical field [0001] The invention relates to the field of advanced wastewater treatment, in particular to a wastewater treatment method using powdered activated carbon in stages. Background technique [0002] Due to its excellent pore structure, strong adsorption and decolorization capabilities, powdered activated carbon is widely used in various sections of the sewage treatment system, and can be added to the pretreatment, biochemical treatment, coagulation treatment or terminal treatment of wastewater treatment, etc. The removal of COD and chroma in wastewater has a good treatment effect, but the dosing of powdered activated carbon is usually a one-time dosing, which is discarded after one use. It is usually difficult to achieve adsorption saturation under normal circumstances, and the adsorption capacity of activated carbon has not been obtained. Fully utilized and discarded, the treatment cost is high and the treatment effect is not significant. [0003] To sum up, t...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/283C02F1/5281C02F1/72C02F1/78C02F3/1215C02F3/30C02F9/00C02F2003/003C02F2209/08C02F2301/046C02F2305/026
Inventor 王靖宇李海波刘亚丽
Owner 徐州赛科康仑智能装备有限公司