电化学氧化活性污泥减量效能

Reduction efficacy of activated sludge by electrochemical oxidation

针对电化学氧化技术是有效而可靠的"清洁技术",提出以Ti/RuO2材料为阳极的同心圆式电解槽为反应器对活性污泥进行电解减量的实验研究.结果表明,电氧化能够有效实现活性污泥减量.当工作电压为6 V、pH值为12、间歇电解60 min、初始混合液悬浮性挥发固体(MLVSS)为4 670 mg.L-1时,活性污泥的表观溶解效率为29.98%.此时污泥溶胞释放出的SCOD和TP分别升高了712.2、33 mg.L-1,NH3-N也达到最大值并呈下降趋势,表明该工艺条件为最佳电解条件.

Because the electrochemical oxidation technology is an effective and reliable clean technology,this study proposed electrochemical oxidation activated sludge process in electrolysis reactor with homocentric circle arrangement electrode in which Ti/RuO2 was used as reticular plates.The results showed that the electrochemical oxidation could significantly reduce activated sludge production.The activated sludge solution efficiency achieved to 29.98% in the experiment under the following optimal oxidation conditions： pH=12,60 min of intermittent electrolysis time,working voltage 6 V and initial MLVSS concentration of 4 670 mg·L-1.Under above conditions,the SCOD and TP released from cell dissolve got the maximum 712.2 and 33 mg·L-1,respectively;meanwhile,the NH3-N also reached the maximum and presented a declining trend,which showed that these conditions were the best electrolysis conditions.