The Study Of Producing And Basic Application Of Biological Degradated Mud Opsonin

Because of water's strong affinity, condensed mud in the city's sewage treatment plant, can not possibly become dehydrated. So it brings a lot trouble to succeeding disposal of sewage, and how to find a cheap, well -dehydrated, opsonin with less possibility of pollution , is effective way of solving more and more serious polluted problem in our city. Microbial flocculants have such following qualities:high performance, safety, able to biological degradation and impossible to cause second pollution. Based on these qualities, we can use it as mud opsonin in the pre-processing process before the dehydration of mud.In the experiment, Miorobal flocculants(MBF-C)can be got from the cultivation of microorganism which can survive in the experiment condition. The best basis incultivation is: 1g/L(NH)₂SO₄, 5g/L K₂HPO₄,2g/L KH₂PO₄, 0.1g/L NaCl, 0.2g/LMgS0₄. 7H₂O,10^-7mol/L fructose with initial PH 7.0. Though opitizing it's cultivating condition and with addition of CaCl₂(1%), the dosage of CaCl₂ is 5mL, the dosage of MBF-C(1‰) is 2mL, getting the biggest flocculating activity of 95.8%.Condensed mud in the forth wastewater treatment of Kunming is pre-processed by the way of MBF-C as the best mud opsonin, the best condition in the effect of opsonin: initial PH 7. 0. the dosage of CaCl₁(1%) is 5mL, the dosage of MBF-C(1‰) is 2mL, the stirring speed is 300r/min. The percent of water in clusion after centrifugal dehydration is 84.5%, it's volume is reduced to about 80%, even it's effect of opsonin is better than PAM, PAC and FeCl₃.