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High-salt epoxy resin production waste-water film integrated salt recovery and biochemical treatment method

A salt epoxy resin and wastewater production technology, applied in the field of industrial wastewater treatment, can solve the problems of enterprise acceptance, high energy consumption, and high operating costs, and achieve the effects of creating economic benefits, high sludge concentration, saving energy and operating costs

Inactive Publication Date: 2006-10-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional evaporative crystallization recovery salt process has high energy consumption and high operating costs, which cannot be accepted by the majority of enterprises.

Method used

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  • High-salt epoxy resin production waste-water film integrated salt recovery and biochemical treatment method
  • High-salt epoxy resin production waste-water film integrated salt recovery and biochemical treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using self-made membrane modules and the membrane distillation device designed by the present invention, a small test experiment was carried out on the treatment of epoxy resin production washing wastewater in a chemical factory in Huangshan, Anhui.

[0032] 1) In the production process of epoxy resin, the first three production washing wastewaters are high-salinity wastewater with a salt content of 10%wt and a COD of 7000mg / L; 1000mg / L low-salinity wastewater;

[0033] 2) The high-salinity wastewater is adjusted to neutrality in the neutralization tank, and is sent to a tubular microporous membrane filter by a booster pump to filter or remove precipitated organic matter through natural sedimentation;

[0034] 3) After filtration, the wastewater clear liquid is circulated into the membrane distillation device under normal pressure for concentration and dehydration. The vacuum degree of the membrane permeation side of the membrane distillation device is 0.4ba; the feed tem...

Embodiment 2

[0037] Using self-made membrane modules and the membrane distillation device designed by the present invention, a small test experiment was carried out on the treatment of epoxy resin production washing wastewater in a chemical factory in Huangshan, Anhui.

[0038] 1) In the production process of epoxy resin, the first three production washing wastewaters are high-salinity wastewater with a salt content of 30%wt and a COD of 15000mg / L; 1500mg / L low-salinity wastewater;

[0039] 2) The high-salinity wastewater is adjusted to neutrality in the neutralization tank, and is sent to a tubular microporous membrane filter by a booster pump to filter or remove precipitated organic matter through natural sedimentation;

[0040] 3) After filtration, the wastewater clear liquid is circulated into the membrane distillation device under normal pressure for concentration and dehydration. The vacuum degree of the membrane permeation side of the membrane distillation device is 0.95ba; the feed...

Embodiment 3

[0043] Using self-made membrane modules and the membrane distillation device designed by the present invention, a small test experiment was carried out on the treatment of epoxy resin production washing wastewater in a chemical factory in Huangshan, Anhui.

[0044] 1) In the production process of epoxy resin, the first three production washing wastewaters are high-salinity wastewater with a salt content of 23.3%wt and a COD of 11500mg / L; 1156mg / L low-salinity wastewater;

[0045] 2) The high-salinity wastewater is adjusted to neutrality in the neutralization tank, and is sent to a tubular microporous membrane filter by a booster pump to filter or remove precipitated organic matter through natural sedimentation;

[0046] 3) After filtration, the wastewater clear liquid is circulated into the membrane distillation device under normal pressure for concentration and dehydration. The vacuum degree of the membrane permeation side of the membrane distillation device is 0.95ba; the fe...

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Abstract

The invention discloses a membrane-process integration salt recovering and biochemical processing method for waste water from high-salinity epoxy resin production, purifying and splitting waste water, i.e. processing the washing waste waters of different salinities and concentrations, respectively: concentrating little amounts of waste water with high salinity and high concentration by membrance distillation integration technique and screening out salt; preprocessing large amounts of rinsing waste water with low salinity and low concentration of organic matters and then processing in a two-stage biochemical processing system, to meet the specified effluent standard. And it largely solves the problem of serious inhibition of high-salinity organic waste water to the biotreatment and adopts salt recovering and water recycling processes, and large amounts of waste heat can serve as a heat source of membrane distillation and the afterheat of the waste water can be used by the membrane distillation.

Description

technical field [0001] The invention belongs to the technical field of industrial waste water treatment, and in particular relates to a membrane method integrated salt recovery and biochemical treatment method for high-salt epoxy resin production waste water. Background technique [0002] The wastewater pollution problem with high salinity and high organic content produced in the production process of epoxy resin has gradually become a bottleneck restricting the further development of the industry. In particular, the production of solid epoxy resin requires a large amount of high-quality washing water. The water consumption per ton of solid epoxy resin is nearly 20 tons, which makes it impossible to produce in areas with scarce water resources and serious water pollution. Therefore, it is urgent to develop a technologically advanced, economical and practical epoxy resin wastewater treatment technology. In addition, this technology can also be extended to the treatment of hig...

Claims

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Application Information

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IPC IPC(8): C02F1/08C02F1/52C02F3/02
CPCB01D3/00B01D3/145B01D61/364B01D2311/2688C01D3/06C02F1/08C02F3/02Y02P20/129Y02P20/10Y02W10/10
Inventor 陈欢林谢林张林沈洁民王树源
Owner ZHEJIANG UNIV
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