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Recovery of Bacillus thuringiensis based biopesticides from fermented sludge by cross-flow microfiltration

文献类型： 外文期刊

作者： Chang, Ming 1 ; Zhou, Shungui 1 ; Sun, Qihong 2 ; Li, Tiexiang 4 ; Ni, Jinren 1 ;

作者机构： 1.Peking Univ, Minist Educ, Key Lab Water & Sediment Sci, Dept Environm Engn, Beijing 100871, Peoples R China

2.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China

3.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

4.Southeast Univ, Dept Math, Nanjing 210096, Jiangsu, Peoples R China

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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