Fluorine-containing sewage treatment method
A sewage treatment method and sewage technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high cost, low fluorine removal rate, environmental pollution, etc. The effect of low production cost
Inactive Publication Date: 2015-10-14
TONGLING MINGJIN PRODUCTIVITY PROMOTION CENT CO LTD
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AI Technical Summary
Problems solved by technology
For these fluorine-containing sewage, most of the manufacturers in my country do not have perfect treatment methods at present, and the fluorine content index in the partnered sewage has not yet reached the national discharge standard, causing environmental pollution
[0003] There are many ways to treat fluorine-containing sewage, and the common domestic methods are roughly divided into two categories, namely, precipitation and adsorption. In addition, there are freezing methods, activated carbon removal of fluorine, etc., but so far they are rarely used in industry, mainly because High cost, low fluoride removal rate
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0012] Embodiment: a kind of fluorine-containing sewage treatment method is characterized in that the method steps are as follows:
[0013] (1) Sedimentation of sewage to remove solids;
[0014] (2) Add quicklime to the sewage and neutralize to pH=12-13;
[0015] (3) Add sulfuric acid into the sewage to adjust the pH=9-8;
[0016] (4) Add polyacrylamide to sewage.
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The invention discloses a fluorine-containing sewage treatment method, wherein quick lime is employed for replacing a part of lime milk with addition of sulfuric acid and a flocculating agent to reduce the high-concentration fluorine-containing sewage, thereby effectively removing fluorine from the sewage. The treatment method is low in production cost and clear liquid in the treated sewage is reusable.
Description
technical field [0001] The invention relates to a method for treating fluorine-containing sewage. Background technique [0002] In industry, fluorine-containing ore mining, metal smelting, aluminum processing, coke, glass, electronics, electroplating, chemical fertilizers, pesticides and other industries often contain high concentrations of fluoride in the sewage discharged. For these fluorine-containing sewage, most manufacturers in my country do not have perfect treatment methods at present, and the fluorine content index in the sewage produced by them has not yet reached the national discharge standard, causing environmental pollution. [0003] There are many ways to treat fluorine-containing sewage, and the commonly used domestic methods are roughly divided into two categories, namely, precipitation and adsorption. In addition, there are freezing methods, activated carbon removal of fluorine, etc., but so far they are rarely used in industry, mainly because High cost an...
Claims
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IPC IPC(8): C02F9/04C02F101/14
Inventor 陈伟
Owner TONGLING MINGJIN PRODUCTIVITY PROMOTION CENT CO LTD