摘要
为筛选出马铃薯废水中产生絮凝剂的菌种,采用牛肉膏蛋白胨培养基、马铃薯葡萄糖培养基和麦芽汁培养基分别筛选马铃薯废水中的细菌、霉菌和酵母菌.经初筛和复筛,从土壤和活性污泥中共筛选到19株具有絮凝活性的菌株,其中N-3和N-4对高岭土悬浊液的絮凝率最高,且N-3菌株的絮凝活性(90.23％)高于N-4菌株絮凝活性(77.60％).通过对N-3菌的培养条件优化,该菌在培养基初始pH为4.5～7.0,培养温度30℃,150 r/min摇床培养2d下,絮凝率可达93.71％.
In order to screen out the strains for producing flocculants in potato wastewater,the bacterium, mould and saccharomycetes were screened by using the beef extract peptone medium,potato extract glucose medium and malt extract medium from the potato wastwater. Through preliminary screening and secondary screening,19 strains were found with flocculating activity from soil and activated sludge. The flocculating rate from the strain N- 3 and N- 4 on kaolin suspension was the highest. The flocculating activity of N- 3 strains was higher than( 90. 23%) than that of N- 4 strains( 77. 60%). After the culture conditions of N- 3 strain was optimized,the flocculation efficiency reached 93. 71% under the condition of initial pH 4. 5 ~ 7. 0,30 ℃, rotation speed of 150r / min and culture time of 2 days.
出处
《西北民族大学学报（自然科学版）》
2013年第4期19-24,56,共7页
Journal of Northwest Minzu University(Natural Science)
基金
现代农业生产发展资助项目(甘财农[2012]323号)
关键词
微生物絮凝剂
菌种筛选
培养条件
絮凝率
Microbial flocculant
Screen
Culture condition
Flocculating rate
