Study of fluoride ion removal by the combination of aluminum sulfate coagulation and continuous micro filtration membrane technology
Received date: 2003-09-20
Online published: 2019-06-03
The fluoride ion concentration of treated secondary effluent in Tianjin Economic Technical Development Area Sewage Treatment Plant is 1.8 mg/L to 3 mg/L. The process of coagulation defluorination with alumin-um sulfate is discussed, and the pH is 6.5 ± 0.2 and the concentration of aluminum salt added is 25 mg/L(the ratio of aluminum sulfate dosing concentration and that of fluoride ion in the wastewater is 8.5). A new defluorination combination process of aluminum salt coagulation and continuous micro filtration (CMF) membrane separation technology is proposed and discussed, and the CMF system could reject the forming flocs in the aluminum sulfate coagulation efficiently. The concentration of fluoride ion in CMF effluent is below 1 mg/L, the SDI value is smaller than 3, the suspended solid concentration is below 5 mg/L, and the turbidity value is below 0.5 NTU, so the result is very satisfactory. It would be a model for exploitation and use of ground water and other water resources with high fluoride ion.
Song Lai-zhou, Li Jian . Study of fluoride ion removal by the combination of aluminum sulfate coagulation and continuous micro filtration membrane technology[J]. Industrial Water Treatment, 0 : 21 -23 . DOI: 10.11894/1005-829x.2004.24(3).21
[1] Yasutoshi Shimizu, et al. Filtration characteristic of hollow fiber micro-filtration membrane used in membrane bioreactor for domestic wastewater treatment [ J ]. Wat. Res., 1996, 30 ( 10 ): 2 385 - 2 392
[2] Lubbecke S, et al. Wastewater treatment in a biological high-performance system with high biomass concentration[J]. Wat. Res., 1995,29 ( 9 ): 793 - 802
[3] Tardieu E, et al. Hydrodynamic control of bioparticle deposition in a MBR applied to wastewater treatment [J]. Journal of Membrane Science, 1998, 147: 1-12
[4] 卢建杭,刘维屏,郑巍.铝盐混凝去除氟离子的作用机理探讨[J].环境科学学报,2000,20(6):7-11
[5] 卢建杭,王红斌,刘维屏.铝盐混凝法去除氟离子的一般作用规律[J].化工环保,2000,20(6):709-713
[6] 吕晓龙.连续微滤技术在城市污水净化回用中的应用[J].建设科技,2002,(7):53-55
[7] 宋来洲.中水回用工程中膜污染防治和节能技术研究[C].天津大学,2003
/
| 〈 |
|
〉 |
津公网安备 12010602120337号