A method for advanced treatment of fluorine-containing wastewater

Abstract

The invention discloses a method for advanced treatment of fluorine-containing wastewater, which belongs to the technical field of fluorine-containing wastewater treatment. The method comprises the steps of: entering the fluorine-containing wastewater into the 1# reaction tank, adjusting the pH value of the wastewater, and after staying for 10 minutes, introducing the upper layer wastewater into the 2# reaction tank, adding GMS-F1 and CaF 2 After the stirring reaction, the upper layer of wastewater is introduced into the 3# reaction tank, after adding GMS‑F5 for stirring reaction, the upper layer of wastewater is introduced into the 4# reaction tank, after the flocculant is added, the upper layer of wastewater is introduced into the inclined plate sedimentation tank for treatment, and the supernatant Flow into the 1# buffer pool; introduce the wastewater in the 1# buffer pool into the 5# reaction pool, add GMS-F5, and after stirring the reaction, introduce the upper layer of wastewater into the 6# reaction pool, adjust the pH value of the wastewater, and introduce the upper layer of wastewater after staying for 10 minutes In the 7# reaction tank, after adding flocculant to stir the reaction, the upper layer of wastewater is introduced into the inclined plate sedimentation tank for treatment, and the supernatant flows into the 2# buffer tank; the wastewater in the 2# buffer tank is introduced into the sand filter tank for filtration and discharged; using this Methods Treating fluorine-containing wastewater can reduce the fluoride ion content in the discharged water to less than 1 mg / L.

Description

technical field [0001] The invention relates to a method for advanced treatment of fluorine-containing wastewater, which belongs to the technical field of fluorine-containing wastewater treatment. Background technique [0002] In recent years, my country's fluorine chemical industry has developed rapidly, and the overall fluorine chemical market is growing at a rate of 15-20%. In the future, the fluorine chemical industry will also be one of the fastest growing industries in the chemical industry. However, the environmental threat brought by the rapid development of the fluorine chemical industry has become the biggest obstacle to the sustainable development of the industry. On the one hand, due to the large amount of fluorine-containing wastewater produced in the manufacturing process of fluorine chemical products, it is easy to pollute water, soil and plants. On the other hand, because most of the fluorine element in wastewater treatment eventually enters into the sludge,...

AI Technical Summary

Problems solved by technology

Traditional advanced treatment methods include adsorption method, ion exchange method, reverse osmosis method, etc., but the investment cost and operating cost are generally high, and there are strict requirements on water quality, frequent and complicated regeneration, backwashing, etc., and are only suitable for treating small streams of wastewater

Therefore, there is an urgent need to develop a method for efficient advanced treatment of fluorine-containing wastewater to overcome the problems of substandard treated wastewater caused by traditional processes and a large waste of production costs.

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