微生物絮凝剂评价体系实验研究

Experiment on evaluation system of microbial flocculant

研究了PO43-与Ca2+对现有的微生物絮凝剂高岭土评价体系的影响。采用传统的烧杯实验,在未加入微生物絮凝剂情况下,仅投加PO43-与Ca2+进行实验。实验发现絮凝率随这两种无机离子的浓度和pH值的增加而增加。当pH值超过7.0,PO43-浓度为0.043 mmol/L,Ca2+浓度为4.0 mmol/L时,絮凝率超过80%;pH值达到8.0时,絮凝率最高达到91%。实验表明,培养基中PO43-浓度较高时,现有的微生物絮凝剂高岭土评价体系会受到PO43-与Ca2+的影响,不能真实地表示微生物絮凝剂的絮凝效果,需要对现有评价体系进行修改。

The influence of PO4^3- and Ca^2＋ on the evaluation system of kaoline, a microbial flocclant, was investigated. The traditional beaker experiment was carried out with PO4^3- and Ca^2＋ while without any microbial flocculants. It is proved that the flocculation effects increase with pH and the concentrations of PO4^3- and Ca^2＋. When pH exceeds 7.0, the concentrations of PO4^3 and Ca^2＋ axe 0.043 mmol/L and 4.0 mmol/L respectively, and the flocculation rate can be 80% above. When pH is 8.0, the flocculation rate can reach 91%. The experiment indicates that the evaluation system of kaoline is affected by PO4^3- and Ca^2＋ when the concentration of PO4^3- is high in the substrate. As the real flocculatiou efficiency cannot be achieved, the evaluation system needs to be modified.