摘要
考察了微生物絮凝剂产生菌Ｂａｃｉｌｌｕｓｓｐ．Ｂ－２发酵生产絮凝剂的絮凝特性．研究表明,该菌在生长过程中产生絮凝剂并将其分泌到细胞外,每升发酵液可制得絮凝剂粗品１．７ｇ,絮凝活性最高达９７%以上,絮凝效能优于目前市售化学絮凝剂．该絮凝剂凝聚絮凝高岭土悬浊液最适宜的ｐＨ值在大于７的偏碱性条件,Ｃａ２＋,Ｍｇ２＋,Ｍｎ２＋,Ａｌ３＋等二价。三价金属离子对其絮凝具有促进作用,且随着Ｃａ２＋浓度的增加,促进作用加强．
Flocculation characteristics of bioflocculant produced by Bacillus sp. B-2 were studied. It showed that Bacillus sp. B-2 produced extracellular flocculant with the highest flocculation activity of 97% superior to common used organic or inorgantic flocculant during its growth. Under the opti-mum conditions, the amount of flocculant production was 1.7 g· l-1. The suitable pH value for the flocculant to flocculate Kaolin clay suspension was higher than 7. Ca2+ , Mg2+ , Mn2+ , Al3+ facilitate flocculation activity of microbial flocculant and the flocculating activity was intensifed with increase in Ca 2+ concentration.
出处
《环境化学》
CAS
CSCD
北大核心
2001年第6期550-556,共7页
Environmental Chemistry
基金
国家自然科学重点基金资助项目(批准号:59838300)
