Sewage treatment process for deeply treating fluorine-containing wastewater

Abstract

The invention relates to a sewage treatment process for deeply treating fluorine-containing wastewater. The sewage treatment process comprises the following steps: inputting the fluorine-containing wastewater into an adjusting tank for treatment; sewage is input into the primary oxidation pond to be treated by acid and alkali solutions; inputting the sewage into a secondary oxidation pond, and carrying out secondary treatment by utilizing an acid solution and an alkali solution; sewage is input into the comprehensive adjusting tank, and domestic sewage is input into the comprehensive adjusting tank at the same time; sewage is input into the pH adjusting pool, and an external sodium hydroxide solution is also input into the pH adjusting pool; sewage is input into the quick mixing tank, and an external PAC solution is also input into the quick mixing tank; sewage is input into the glue feather pool, and an external PAM solution is also input into the glue feather pool; sewage is input into the settling pond, and the settling pond is used for settling the sewage; inputting the sewage into a neutralization tank, and inputting an external second sulfuric acid solution into the neutralization tank; and inputting the sewage into a discharge pool to complete the treatment of the fluorine-containing wastewater.

Description

technical field [0001] The invention relates to a sewage treatment process for advanced treatment of fluorine-containing waste water. Background technique [0002] Fluorine is one of the trace elements required by human physiology. Fluoride ions in drinking water are beneficial or harmful to human health, mainly depending on its intake. Its main function is teeth and bones. When the fluoride ion in drinking water is less than 0.5 mg / L, it may cause dental caries in children, higher than 1.5mg / L can lead to dental fluorosis, and when the content reaches 3-6mg / L, bone fluorosis occurs, which is an endemic disease that seriously endangers human health. The suitable concentration is 0.5~1.0mg / L. [0003] Some of the fluorine-containing wastewater treatment systems in the prior art adopt lime precipitation method, which has low treatment cost, but the treatment effect is poor, the amount of sludge generated is large, and it also involves the disposal of lime residues, and it can...

AI Technical Summary

Problems solved by technology

[0003] Some of the fluorine-containing wastewater treatment systems in the prior art adopt the lime precipitation method, which has a low treatment cost, but the treatment effect is poor, the amount of sludge produced is large, and it also involves the disposal of lime residues, and cannot meet the requirements of the enterprise on the plant area. high demands on the environment

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