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Method for treating ABS (acrylonitrile-butadiene-styrenecopolymer) resin production wastewater

A treatment method and technology for producing wastewater, which is applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of failure to meet discharge requirements, unsatisfactory treatment effect, and large amount of flocculant used and other issues, to achieve the effect of low cost, improved biodegradability, and small usage

Inactive Publication Date: 2011-06-22
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

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

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  • Method for treating ABS (acrylonitrile-butadiene-styrenecopolymer) resin production wastewater
  • Method for treating ABS (acrylonitrile-butadiene-styrenecopolymer) resin production wastewater

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Embodiment Construction

[0014] The flow chart of the ABS resin production wastewater treatment method of the present invention is as follows figure 1 According to the water quality characteristics of wastewater in districts B, C and E, it carries out qualitative treatment.

[0015] The wastewater from Zone B and C is mixed in any proportion and then enters the adjustment tank. The pH value of the adjusted wastewater is 6.0-8.0; the effluent from the adjustment tank enters the coagulation tank, and coagulant is added for coagulation reaction. The coagulant is polyaluminum and polypropylene. For amide, the amount of polyaluminum and polyacrylamide added per ton of wastewater (calculated by dry weight) is 0.25~1.0kg and 1.0~3.0g respectively; the effluent from the coagulation tank enters the air flotation tank and adopts pressurized air flotation. Air flotation scum enters the dehydration machine room, and the effluent from the air flotation pool enters the homogenization pool;

[0016] The wastewater in Zo...

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Abstract

The invention discloses a method for treating ABS (acrylonitrile-butadiene-styrenecopolymer) resin production wastewater, which comprises the following steps of: (a1) after mixing the wastewater of B and C areas in any proportion, adjusting a pH value to be 6.0 to 8.0; adding a coagulant for coagulating; carrying out air flotation on the coagulated water; dehydrating floating slag; carrying out operation on the separated water according to the step (b2) and waiting for treating the water subjected to air flotation; (b1) adjusting a wastewater pH value of an E area to be 3.5 to 6.0 and then filtering and recycling ABS powder; carrying out micro-electrolysis reaction on discharged water and coagulating the reacted water; (b2) settling the coagulated water or the water obtained after dehydrating treatment; cooling the settled water; dehydrating settled sediments and treating the separated water according to the step (b2); mixing the cooled water with the water subjected to air flotation treatment in any proportion, adjusting a pH value to be 6.5 to 7.5 and charging the water into a biological fluidized bed for carrying out biochemical treatment; then carrying out secondary precipitation; discharging the treated water; and dehydrating the sediments and treating the separated water according to the step (b2). The method for treating ABS resin production wastewater, disclosed by the invention, has the advantages of low cost and good treatment effect.

Description

Technical field [0001] The invention relates to a treatment method of ABS resin production wastewater. Background technique [0002] The ABS resin factory in my country mainly adopts the emulsion grafting bulk SAN blending production process, and its production wastewater mainly comes from Zone B (butadiene polymerization section), Zone C (ABS grafting section) and Zone E (cohesion drying section). Production nodes. Areas B and C are mainly high-concentration rubber-clearing wastewater produced by regular rubber-clearing in the reactor, with high COD Cr , High turbidity and intermittent discharge characteristics, the main pollutant in the wastewater is latex polymer; E zone wastewater is pickling wastewater, with low pH, large water volume, continuous discharge, high toxicity and poor biodegradability Features: There are many kinds of characteristic pollutants, mainly aromatic compounds, acrylonitrile, acrylonitrile oligomers and their derivatives, and other toxic, harmful and re...

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Application Information

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IPC IPC(8): C02F9/14C02F103/36
Inventor 周岳溪赖波宋玉栋王海燕蒋进元席宏波吴昌永
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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