Title :
The Study of Removing Fluoride in Desulphurization Waste Water from Power Plants
Author :
Zheng, Yanghua ; Zhang, Yalei ; Jiang, Ming ; Gong, Bentao ; Zhang, Shiping
Author_Institution :
State Key Lab. of Pollution Control & Resource Reuse, Tongji Univ., Shanghai, China
Abstract :
The most effective way for removing fluorine in desulfurization waste water of power plants was discussed in this paper on the basis of various fluoride removal methods. The chemical precipitation + coagulation (+ flocculation) method was recommended .The results indicated that the feasible precipitant and coagulation reagent were Ca(OH)2 and Al2(SO4)3, the optimal Ca/F and Al/F were 1:1.5 and 3:2, respectively. Further experiment was carried out with an assistant flocculant polyacrylamide (0.1%) and the optimal VPAM was studied. Many experimental results revealed: this removing fluoride system can reduce the fluorine concentration from 140-200 mg/L to 10 mg/L below in waste water, according with the industrial waste water discharge standards in our country. The method to treat fluoride waste water was operated conveniently and low-cost, and it can be generalized widely in power plants.
Keywords :
coagulation; flocculation; flue gas desulphurisation; precipitation; wastewater treatment; assistant flocculant polyacrylamide; chemical precipitation; coagulation reagent; desulphurization waste water; feasible precipitant; flocculation; fluoride removal; fluorine concentration; industrial waste water discharge standards; optimal VPAM; power plants; Calcium; Chemical technology; Coagulation; Electric potential; Electrodes; Measurement standards; Power generation; Volume measurement; Wastewater treatment; Water pollution; fluorine removal desulphurization waste water Ca(OH)2 Al2(SO4)3 PAM precipitate coagulation flocculants;
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-0-7695-3819-8
DOI :
10.1109/ICEET.2009.449
