%0 Journal Article
%T Bioconversion of Sewage Sludge to Biopesticide by Bacillus thuringiensis<br>微生物转化污泥制备苏云金杆菌生物杀虫剂
%A CHANG Ming
%A ZHOU Shun-gui
%A LU Na
%A NI Jin-ren
%A <br>常明
%A 周顺桂
%A 卢娜
%A 倪晋仁
%J 环境科学
%D 2006
%I 
%X Feasibility of bioconversion of sewage sludge to biopesticide by Bacillus thuringiensis was studied using sewage sludge as a raw material.The fermentation was also compared with conventional medium.Results showed that without any pretreatment,the nutrients contained in sewage sludge were almost sufficient for Bacillus thuringiensis growth,even with a rapid multiplicational rate.Higher viable cells and viable spores values were obtained earlier at 24 h,with 9.48×108(CFU·mL-1) and 8.51×108(CFU·mL-1) respectively,which was 12 hours earlier and nearly 20 percent higher than conventional medium.SEM of 36 h samples gave a clear phenomenon that the metabolizability in sludge was much faster with spores and crystals spreading around.The crystals in sludge seemed rather bigger and more regular.Also a better crystal protein yield of 2.80(mg·mL-1) was observed in sludge medium compared to conventional medium at the end of fermentation. Sludge fermentation for Bacillus thuringiensis reduces the producing cost,and gives better fermentation capabilities.It's expected to be a new method for sludge disposal.
%K sludge disposal
%K Bacillus thuringiensis
%K biopesticide<br>污泥处置
%K 苏云金芽孢杆菌
%K 生物杀虫剂
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=B3D32903A42A8AC7&yid=37904DC365DD7266&vid=DB817633AA4F79B9&iid=DF92D298D3FF1E6E&sid=CFB9125E4BCA3130&eid=E7F52902BDBF1DF2&journal_id=0250-3301&journal_name=环境科学&referenced_num=7&reference_num=13