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A method for treating disperse dye wastewater with high chloride salt content

A technology of disperse dyes and treatment methods, which is applied in the field of treatment of disperse dye wastewater with high chloride salt content, can solve the problems of high wastewater load, difficulty in maintaining stable microbial activity, and high concentration of chlorine-containing salts, so as to reduce engineering investment and operating costs, Effect of increasing sludge concentration and biological activity, flexible operation space and variables

Active Publication Date: 2019-05-21
CHINA COAL TECH & ENG GRP HANGZHOU ENVIRONMENTAL PROTECTION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for disperse dye wastewater with high chloride salt content, conventional pretreatment + biochemical process is difficult to make it discharge up to the standard. The COD removal rate of disperse dye wastewater is generally about 10-30%, and the effluent B / C is about 0.2, resulting in a high load of wastewater entering the biochemical industry; (2) The concentration of chlorine salt is high, and there is no response to high chloride salt disperse dye wastewater (3) The fillers in the ordinary aerobic tank have poor adhesion, low sludge concentration, and poor treatment effect, which may easily lead to excessive discharge of wastewater

Method used

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  • A method for treating disperse dye wastewater with high chloride salt content

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Effect test

Embodiment 1

[0037] A disperse dye wastewater with high chloride salt content, the chlorine salt content in the wastewater is 10040mg / L, COD=1310mg / L, B / C=0.11.

[0038] like figure 1 Shown, this wastewater treatment method comprises the following steps:

[0039]1) Treat the disperse dye wastewater with high chloride salt content in the wastewater regulating pool through a multi-component catalytic oxidation pretreatment check system, which includes a first-level micro-electrolysis system and a second-level micro-electrolysis system connected in sequence and a catalytic oxidation system; the catalytic oxidation system is filled with an oxidation reaction catalyst.

[0040] Wherein, micro-electrolysis reactor is arranged in described 1st stage micro-electrolysis system and 2-stage micro-electrolysis system, and the filler of described micro-electrolysis reactor is multi-element micro-electrolysis filler, and described multi-element micro-electrolysis filler is made of activated carbon, act...

Embodiment 2

[0051] A disperse dye wastewater with high chloride salt content, the chlorine salt content in the wastewater is 15100mg / L, COD=2040mg / L, B / C=0.13.

[0052] The wastewater treatment method comprises the following steps:

[0053] 1) Treat the disperse dye wastewater with high chloride salt content in the wastewater regulating pool through a multi-component catalytic oxidation pretreatment check system, which includes a first-level micro-electrolysis system and a second-level micro-electrolysis system connected in sequence and a catalytic oxidation system; the catalytic oxidation system is filled with an oxidation reaction catalyst.

[0054] Wherein, micro-electrolysis reactor is arranged in described 1st stage micro-electrolysis system and 2-stage micro-electrolysis system, and the filler of described micro-electrolysis reactor is multi-element micro-electrolysis filler, and described multi-element micro-electrolysis filler is made of activated carbon, activated iron powder, A...

Embodiment 3

[0065] A disperse dye wastewater with high chloride salt content, the chlorine salt content in the wastewater is 21900mg / L, COD=3360mg / L, B / C=0.12.

[0066] The wastewater treatment method comprises the following steps:

[0067] 1) Treat the disperse dye wastewater with high chloride salt content in the wastewater regulating pool through a multi-component catalytic oxidation pretreatment check system, which includes a first-level micro-electrolysis system and a second-level micro-electrolysis system connected in sequence and a catalytic oxidation system; the catalytic oxidation system is filled with an oxidation reaction catalyst.

[0068] Wherein, micro-electrolysis reactor is arranged in described 1st stage micro-electrolysis system and 2-stage micro-electrolysis system, and the filler of described micro-electrolysis reactor is multi-element micro-electrolysis filler, and described multi-element micro-electrolysis filler is made of activated carbon, activated iron powder, T...

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Abstract

The invention relates to the field of water treatment and discloses a method for treating disperse dyestuff wastewater with high chlorine salt content. The method comprises the following steps: 1) treating wastewater through a multiple catalytic oxidation pretreatment system, wherein the multiple catalytic oxidation pretreatment system comprises a primary micro-electrolysis system, a secondary micro-electrolysis system and a catalytic oxidation system which are sequentially connected; 2) further removing pollutants in wastewater by super-magnetic separation equipment, 3) transferring the wastewater into an A / O multi-level biological enrichment system for performing biological treatment, wherein the A / O multi-level biological enrichment system comprises a facultative tank, an aerobiotic tank and a sedimentation tank which are sequentially connected; 4) transferring the wastewater into a security oxidation pond; 5) transferring the wastewater into a clean-water reservoir, and discharging. According to the method disclosed by the invention, due to multiple pretreatment means and biological enrichment process, stable standard treatment of the disperse dyestuff wastewater with high chlorine salt content is realized.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method for treating disperse dye wastewater with high chloride salt content. Background technique [0002] Disperse dye wastewater is currently recognized as a refractory chemical wastewater that is difficult to treat. It has the characteristics of strong toxicity, high salinity, high COD concentration, high ammonia nitrogen concentration, and poor biodegradability. Among them, the treatment of disperse dye wastewater with high chloride salt is the most difficult, and chloride ions have a significant impact on microorganisms. The highest salt content in disperse dye mother liquor wastewater can reach more than 14%. In general, chlorine ions in wastewater higher than 5000mg / L will affect the growth and metabolism of microorganisms, and higher than 20000mg / L will have a significant inhibitory effect on microorganisms, resulting in reduced sludge activity and biochemical treatment e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30C02F101/12
CPCC02F1/461C02F1/488C02F1/5245C02F1/56C02F1/72C02F1/725C02F1/76C02F1/78C02F3/105C02F3/1215C02F3/1221C02F3/305C02F9/00C02F2101/12C02F2101/308C02F2209/08C02F2301/046C02F2301/08
Inventor 秦树林高亮王坤王忠泉龚梦锡
Owner CHINA COAL TECH & ENG GRP HANGZHOU ENVIRONMENTAL PROTECTION INST
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