Recovery of Bacillus thuringiensis based biopesticides from fermented sludge by cross-flow microfiltration
文献类型: 外文期刊
第一作者: Chang, Ming
作者: Chang, Ming;Zhou, Shungui;Ni, Jinren;Chang, Ming;Sun, Qihong;Zhou, Shungui;Li, Tiexiang
作者机构:
关键词: Bacillus thuringiensis;Permeate flux;Process optimization;Membrane;Modeling
期刊名称:DESALINATION AND WATER TREATMENT ( 影响因子:1.254; 五年影响因子:1.553 )
ISSN: 1944-3994
年卷期: 2012 年 43 卷 1-3 期
页码:
收录情况: SCI
摘要: The recovery of Bacillus thuringiensis (Bt) based biopesticides from fermented sludge broth via cross-flow microfiltration (CFMF) was evaluated. Three types of microfiltration membranes, WX-model cellulose, cellulose acetate, and polyethersulfone, were tested for their permeate flux and restoration capacity. The cellulose acetate membrane with a pore size of 0.8 mu m was selected for further process optimization and modeling of CFMF. Under optimal conditions, the permeate flux could be greater than 20 l/m(2)/h if the retentate contained was less than 100 g/l. The spore and crystal proteins recoveries were found to be 99 and 95%, respectively. The standard hydraulic resistance-in-series model was used to determine the parameters of CFMF of Bt fermented sludge. The results demonstrated that CFMF was effective for Bt based biopesticide recovery from fermented sludge.
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