摘要
从活性污泥中分离得到一株微生物絮凝剂产生菌G-420,并对该菌所产絮凝剂MBF-420的絮凝特性进行了研究。实验结果表明:该絮凝剂为微生物胞外产物,絮凝活性成分主要分布在发酵液中;该絮凝剂有良好的热稳定性,于100℃水浴中保持30min,絮凝率仍能达到93%以上;具有较强的耐酸碱性;当絮凝剂用量为2.4mg·L-1时,絮凝率高达95.99%;以金属离子作助凝剂能有效提高絮凝率,最适宜的助凝剂为Ca2+;该絮凝剂对高岭土、土壤悬液、矿石粉等几种常见悬浊液体系均有较好絮凝效果。
A strain of bioflocculant-generating sludge. The flocculating property of MBF-420 bacterium, named G-420 was isolated from activated produced by flocculant-generated bacteria G-420 was studied. It was shown that the bioflocculant was an extra-cellular production and the flocculating active components were mainly distributed in the fermentation broth. MBF-420 had good flocculating capability and could achieve the flocculating rate of 95.99 % for kaolin suspension at a dosage of 2.4 mg.Lq. Meanwhile, MBF-420 was heat-stable, while it was kept in boiling water for 30 rain, the flocculating rate was still retained above 93%. It also could keep high flocculating activity in a wide range of pH from 1 to 10, and the best flocculating activity was attained when the pH value was 4. The addition of metal ion could increase the flocculation rate and Ca^2＋ was the best metal ion. It also presented a good flocculating effect on different suspensions.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2007年第9期1274-1277,共4页
Chemical Industry and Engineering Progress
关键词
生物絮凝剂
硅酸盐细菌
絮凝特性
bioflocculant
silicate bacteria
flocculating property
