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Method for preprocessing waste water generated in ABS resin production

A technology for ABS resin and waste water production, which is applied in water/sewage treatment, natural water treatment, flotation water/sewage treatment, etc. It can solve the problems of failing to meet discharge requirements, unsatisfactory treatment effect, and large amount of flocculant used. To achieve the effect of improving biodegradability, reducing processing cost and good effect

Inactive Publication Date: 2012-06-27
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing pretreatment methods for ABS resin production wastewater are to first mix the wastewater in the three areas of B, C, and E, and then use the coagulation-air flotation method for treatment. The amount of flocculant used is large, the treatment effect is not ideal, and the discharge cannot be achieved. Require

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  • Method for preprocessing waste water generated in ABS resin production

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Water quality of wastewater: COD of glue cleaning wastewater in areas B and C Cr It is 3000mg / L, the turbidity is 939 degrees, the pH value is 6.8, BOD 5 / COD Cr 0.05; COD of pickling wastewater in E zone Cr 1000mg / L, pH 2.5, BOD 5 / COD Cr is 0.3.

[0023] Process according to the above method, use waste lye to adjust the pH value to 3 in the regulating tank; the filler of iron-carbon micro-electrolysis adopts sponge iron and activated carbon with a particle diameter of 2 to 5 mm, and the iron-carbon ratio is 1: 1; The hydraulic retention time in the micro-electrolysis reaction pool is 0.5h; the mixing ratio of the effluent from the iron-carbon micro-electrolysis reaction pool and the glue-removing wastewater in areas B and C is 1:10.

[0024] After treatment, COD of wastewater in areas B and C Cr and turbidity removal rate reached more than 95%; E area wastewater COD Cr The removal rate is 52%, BOD 5 / COD Cr Increased to 0.7.

Embodiment 2

[0026] Water quality of wastewater: COD of glue cleaning wastewater in areas B and C Cr It is 3000mg / L, the turbidity is 939 degrees, the pH value is 6.8, BOD 5 / COD Cr 0.05; COD of pickling wastewater in E zone Cr 1000mg / L, pH 2.5, BOD 5 / COD Cr is 0.3.

[0027] According to the above method, the pH value is adjusted to 5 by using waste lye in the adjustment tank; the filler of iron-carbon micro-electrolysis adopts sponge iron and activated carbon with a particle size of 40-50 mm as filler, and the iron-carbon ratio is 1: 3; The hydraulic retention time in the carbon micro-electrolysis reaction pool is 4 hours; the mixing ratio of the effluent from the iron-carbon micro-electrolysis reaction pool and the glue-removing waste water in areas B and C is 1:1.

[0028] After treatment, COD of wastewater in areas B and C Cr and turbidity removal rate reached more than 90%; E area wastewater COD Cr The removal rate is 50%, BOD 5 / COD Cr improved to 0.71.

Embodiment 3

[0030] Water quality of wastewater: COD of glue cleaning wastewater in areas B and C Cr It is 3000mg / L, the turbidity is 939 degrees, the pH value is 6.8, BOD 5 / COD Cr 0.05; COD of pickling wastewater in E zone Cr 1000mg / L, pH 2.5, BOD 5 / COD Cr is 0.3.

[0031] According to the above method, the pH value is adjusted to 6 by using waste lye in the regulating tank; the filler of iron-carbon micro-electrolysis adopts sponge iron and activated carbon with a particle size of 10-20 mm as filler, and the iron-carbon ratio is 4: 1; The hydraulic retention time in the carbon micro-electrolysis reaction pool is 10h; the mixing ratio of the effluent from the iron-carbon micro-electrolysis reaction pool and the glue-removing waste water in areas B and C is 10:1.

[0032] After treatment, COD of wastewater in areas B and C Cr and turbidity removal rate reached more than 95%; E area wastewater COD Cr The removal rate is 55%, BOD 5 / COD Cr improved to 0.72.

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Abstract

The invention discloses a method for preprocessing generated in ABS resin production. The method comprises the following steps of: (1) firstly filtering waste water in a region E of an ABS resin production workshop; (2) regulating pH of the filtered water to be3-6; (3) carrying out iron carbon microelectrolysis reaction on the water with pH of 3 to 6; (4) mixing the water subjected to the iron carbon microelectrolysis reaction with the waste water in regions B and C of the ABS resin production workshop and carrying out coagulation demulsification treatment after the mixing; (5) carrying out air-floating treatment on the water subjected to the coagulation demulsification treatment; and (6) dewatering sludge produced by the air-floating treatment and returning the separated water to the step (4), and discharging the water subjected to the air-floating treatment. The method for preprocessing the waste water generated in the ABS resin production has favorable effect of treating the sewagewithout additional flocculating agents.

Description

technical field [0001] The invention relates to a pretreatment method for ABS resin production wastewater. Background technique [0002] ABS resin production wastewater mainly comes from three production nodes in B, C and E areas. Areas B and C are mainly high-concentration glue-removing wastewater produced by regular glue-clearing of the reactor, with high COD Cr , high turbidity and intermittent discharge characteristics, the main pollutants in the wastewater are latex-like polymers; the wastewater in E zone is pickling wastewater, which has low pH value, large water volume, continuous discharge, high toxicity and poor biodegradability Features: There are many types of characteristic pollutants, mainly toxic, harmful and refractory organic pollutants such as benzene series, acrylonitrile, oligomers of acrylonitrile and their derivatives. Most of the existing pretreatment methods for ABS resin production wastewater are to first mix the wastewater in the three areas of B, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F1/66C02F1/461C02F1/52C02F1/24C02F103/38
Inventor 周岳溪赖波
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI