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Zero-discharge process and system for wastewater reuse in integrated circuit industry

A technology for industrial wastewater and integrated circuits, applied in the field of water treatment

Pending Publication Date: 2021-04-02
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The ratio of the current membrane concentration technology to the recycled water is as follows, the general design ratio is 90%; however, in actual operation, it can only reach 70-80%

Method used

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  • Zero-discharge process and system for wastewater reuse in integrated circuit industry
  • Zero-discharge process and system for wastewater reuse in integrated circuit industry
  • Zero-discharge process and system for wastewater reuse in integrated circuit industry

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Embodiment Construction

[0037] This embodiment provides a zero-discharge technology for wastewater reuse in the integrated circuit industry, such as figure 1 As shown in the figure, the specific process is as follows: the wastewater is sequentially treated by organic biomembrane integrated treatment / oxidative adsorption equipment / secondary physicochemical precipitation equipment, ultrafiltration, four-stage membrane concentration equipment and evaporator to achieve the effect of zero discharge.

[0038] Among them, the purified water treated by the four-stage membrane concentration equipment is also purified by the second purification equipment.

[0039] Here, the use of organic biofilm integrated treatment / oxidative adsorption equipment / secondary physicochemical precipitation equipment is as follows:

[0040] In general, different pretreatment methods are used for different wastewaters.

[0041] For example: for high-concentration organic wastewater (ie, the COD index is greater than 3000mg / L, the ...

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Abstract

The invention provides a zero-discharge process and system for wastewater reuse in the integrated circuit industry. The zero-discharge process is characterized in that wastewater is sequentially subjected to oxidation adsorption, secondary physicochemical precipitation, ultrafiltration, four-section membrane concentration, secondary purification treatment and concentrated liquor evaporation treatment. According to the invention, the effect that the recovery rate can be not lower than 96% is achieved in a multi-section concentration and high-low combination mode. Considering the need for equipment maintenance, the recovery rate of not lower than 90% can still be achieved under the condition that part of equipment is adopted for bypass maintenance, namely, a one-stop-three-use condition.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a zero-discharge process and system for wastewater reuse in the integrated circuit industry. Background technique [0002] The ratio of the current membrane concentration technology to the recycled water is as follows, and the general design ratio is 90%; however, in actual operation, it can only reach 70-80%. SUMMARY OF THE INVENTION [0003] The present invention aims to overcome the above-mentioned defects, and achieves the effect that the recovery rate can reach not less than 96% by means of multi-stage concentration and combination of high and low. Taking into account the needs of equipment maintenance, some equipment is used for bypass maintenance, that is to say, under the condition of 1 stop and 3 use, the leaf can achieve a recovery rate of not less than 90%. [0004] The invention provides a zero-discharge process for waste water reuse in the integrated circuit industr...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F101/20
CPCC02F9/00C02F3/12C02F1/72C02F1/283C02F1/5236C02F2101/20C02F1/444C02F1/441C02F2301/08C02F1/04C02F2101/30
Inventor 夏志先张金山赵九娟
Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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