A treatment method for fluorine-containing reused water

A treatment method and technology for water reuse, applied in multi-stage water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as the inability to meet the water requirements of ultrapure water, reduce fluorine content, and improve recovery. The effect of high utilization rate and removal efficiency
CN110451704BActive Publication Date: 2020-09-11NANJING UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2020-09-11

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Abstract

The invention discloses a method for treating fluorine-containing reuse water. The method comprises the following specific steps: (1) pretreatment; (2) flocculation precipitation; (3) filtration-reverse osmosis membrane filtration; (4) total organic carbon (TOC) degradation and ultraviolet sterilization; (5) electrodeionization (EDI) treatment; (6) TOC degradation and ultraviolet sterilization; and (7) precise filtration. The invention has the advantages that water quality of an effluent can reach a standard of ultra-pure water, fluorine removal efficiency is high, the recycling rate of wastewater is high, and operation cost is low.
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Description

technical field

[0001] The invention belongs to the field of wastewater treatment, and more specifically relates to a treatment method for fluorine-containing reused water in the electronics industry. Background technique

[0002] With the rapid development of electronic products in recent years, the discharge of wastewater from the electronics industry is increasing day by day. In addition, due to the increasingly complex preparation process of the electronics industry, the difficulty of electronic wastewater treatment is also increasing. At present, the main sources of electronic wastewater include grinding, chemical etching, black / brown oxidation, deburring, desmear removal, plated through holes, tin plating, copper plating, tin stripping, solder resist green paint, development and molding cleaning. Therefore, electronic wastewater contains a variety of substances that need to be treated and have negative effects on the environment, including fluoride ions. Taking semico...

Claims

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