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Biochemical treatment process of coking wastewater

A technology for coking wastewater and biochemical treatment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as difficulty in producing water to meet standards, achieve COD value reduction, high microbial Concentration, the effect of reducing water output

Active Publication Date: 2014-09-03
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the deficiencies of the existing technology and solve the problem that the biochemical treatment of coking wastewater needs to add dilution water and the produced water is difficult to meet the standard

Method used

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  • Biochemical treatment process of coking wastewater

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Experimental program
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Effect test

Embodiment 1

[0028]The inner electrolytic filler 3 is made by high-temperature sintering, wherein the sintering temperature is 500°C, the particle diameter of the filler is 0.5cm, the firing raw materials are iron powder and carbon powder, and the firing ratio is 1 according to the mass ratio of iron powder and carbon powder :3. Wherein coking waste water is 2 hours in anaerobic biofilter 1 residence time, is 20 minutes with filler 3 contact time; Coking waste water is 6 hours in anoxic pond 6 residence time of A-O biochemical reaction system, and aerobic pond 7 residence time is 26 hours. The total residence time of the coking wastewater in the anaerobic biological filter 1, anoxic 6 and aerobic 7 is 34 hours. The sludge in the sedimentation tank 8 in the A-O biochemical reaction system flows back into the aerobic tank 7 with a return percentage of 40%, and the nitrification solution in the sedimentation tank 8 in the A-O biochemical reaction system returns to the anoxic tank 6 with a re...

Embodiment 2

[0032] The inner electrolytic filler 3 is made by high-temperature sintering, wherein the sintering temperature is 800°C, the particle diameter of the filler is 20cm, the firing raw materials are iron powder and carbon powder, and the firing ratio is 2 according to the mass ratio of iron powder and carbon powder: 3. Wherein coking waste water is 4 hours in anaerobic biofilter 1 residence time, is 30 minutes with filler 3 contact time; Coking waste water is 12 hours in anoxic pond 6 residence time of A-O biochemical reaction system, and aerobic pond 7 residence time is 32 hours. The total residence time of coking wastewater in anaerobic biological filter 1, anoxic 6 and aerobic 7 is 48 hours. The sludge in the sedimentation tank 8 in the A-O biochemical reaction system is returned to the anoxic tank 6, and the return percentage is 100%. The nitrification solution in the sedimentation tank 8 is returned to the aerobic tank 7, and the return percentage is 300%.

[0033] The wa...

Embodiment 3

[0036] The inner electrolytic filler 3 is made by high-temperature sintering, wherein the sintering temperature is 1000°C, the particle diameter of the filler is 30cm, the firing raw materials are iron powder and carbon powder, and the firing ratio is 2 according to the mass ratio of iron powder and carbon powder: 1. Wherein coking waste water is 6 hours in anaerobic biofilter 1 residence time, is 80 minutes with filler 3 contact time; Coking waste water is 14 hours in anoxic pond 6 residence time of A-O biochemical reaction system, and aerobic pond 7 residence time is 30 hours. The total residence time of the coking wastewater in the anaerobic biological filter 1, anoxic 6 and aerobic 7 is 50 hours. The sludge in the sedimentation tank 8 in the A-O biochemical reaction system flows back into the aerobic tank 7 with a return percentage of 150%, and the nitrifying liquid in the sedimentation tank 8 in the A-O biochemical reaction system returns to the aerobic tank 7 with a ret...

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Abstract

The invention relates to a biochemical treatment process of coking wastewater. The method comprises the following steps: (a) firstly enabling coking wastewater to enter an anaerobic biofilter to carry out anaerobic hydrolysis reaction and internal electrolytic reaction, wherein an internal electrolytic filler capable of carrying out internal electrolytic reaction is arranged in the anaerobic biofilter; (2) enabling coking wastewater treated by the anaerobic biofilter to enter an A-O (Anoxic / Oxic) biochemical reaction system to carry out anoxic-aerobiotic biological treatment. The biochemical treatment process disclosed by the invention aims at improving the biological treatment effect of coking wastewater and reducing the amount of dilution water.

Description

technical field [0001] The invention relates to a biochemical treatment process of coking wastewater, that is, an AAO biochemical treatment system using internal electrolytic fillers to strengthen anaerobic biological filters. Background technique [0002] The iron and steel industry is one of the industries that consume the most resources and energy. It consumes a large amount of coke in the smelting process, and coking wastewater that is seriously polluted and difficult to treat will be produced in the process of coking, gas purification and chemical product refining in coking plants. Biochemical treatment of coking wastewater is still one of the more economical and effective methods commonly used at present. The treatment of coking wastewater includes biological dephenolization and biological denitrification. In the biological treatment of coking wastewater, aerobic, anaerobic, anoxic and autotrophic, heterotrophic and multitrophic intertwined biological populations are i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 王海东逯博特张帆赵锐锐高康乐孙玉亮李红石宇贾博中周王斌邱鹏程旸贾寅卯帖春英
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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