摘要
研究了酱油曲霉(Aspergillus sojae)产生的微生物絮凝剂(MBF)的稳定性,并将其用于城市污水厂的浓缩污泥的强化脱水。结果表明:由酱油曲霉提取的MBF具有很好的热稳定性和酸碱稳定性,4℃低温条件下保存35d后絮凝率仍在96%以上,而常温条件下保存35d后不同pH的MBF絮凝率差别很大。与PAM、PAC相比较,MBF能更好地降低城市污水处理厂浓缩污泥比阻。MBF对浓缩污泥的强化脱水的最佳投加量为7%(V/V),且MBF的单耗随着污泥处理量的增大而逐渐减小。
The stability of microbial flocculant （MBF） produced by AspergiUus sojae and its application to municipal thickened sludge dewatering were studied. The results showed that the MBF had high heat and acid-base endurance with high flocculating activity in a wide range of pH from 1.5 to 12. The MBF retained 96% of flocculating activity after 35 days preservation at 4℃, but in different pH the flocculating activity difference was very apparent after 35 days store at room temperature. The experimental results also demonstrated that the MBF was better than PAM and PAC in reducing specific resistance filtration. The optimal dose of MBF used for intensifying thickened sludge dewatering is 7%（volume fraction）. And the more the volume of sludge is treated, the less the cost of MBF for unit volume sludge treatment.
出处
《微生物学通报》
CAS
CSCD
北大核心
2008年第5期685-689,共5页
Microbiology China
基金
广东省科技计划项目(No.2005B33301004)
关键词
微生物絮凝剂
浓缩污泥
污泥脱水
Microbial flocculant, Municipal thickened sludge, Dewatering
