"The main source of fluorine-containing wastewater is fluorine-containing" three wastes "discharged from industrial production.
2022-07-28
"The main source of fluorine-containing wastewater is the" three wastes "discharged from industrial production. The industries involved mainly include aluminum electrolysis, steel, cement, bricks and tiles, ceramics, phosphate fertilizer, glass, semiconductors, pharmaceuticals, etc. The common feature of these industries is that fluorine-containing minerals are the main raw materials or auxiliary raw materials. In the process of smelting and production, fluorine is decomposed from minerals to produce fluorine-containing wastewater.
At present, there are many researches on the treatment of fluorine-containing wastewater at home and abroad. The main treatment methods are: chemical precipitation, flocculation precipitation, adsorption, seed addition, ion exchange, reverse osmosis, activated carbon fluoride removal, electrodialysis and electrocoagulation. There are many fluoride treatment methods, but most of them have problems such as unstable water quality, excessive use of chemicals, or secondary pollution, which makes these fluoride removal methods have certain limitations. For the above method, ion exchange has high requirements on the water quality of the incoming water, the treatment cost of activated carbon defluoridation is high, the reverse osmosis and electrocoagulation process is complex, the power consumption is large, and the cost is high. At present, the industrial treatment goal of fluorine-containing wastewater is only to achieve the discharge standard of effluent, and the treatment methods widely used on this basis are mainly chemical precipitation and flocculation precipitation.
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