微压内循环反应器与序批式反应器的污染物去除及污泥特性比较

Comparison of pollutants removal and sludge characteristics between micro-pressure swirl reactor and sequencing batch reactor

微压内循环反应器(MPSR)是在序批式反应器(SBR)基础上研制的一种新型污水处理装置。重点从污泥特性方面对两个反应器进行了比较。结果表明,MPSR稳定运行时对水中COD、TP和TN的平均去除率分别为93.99%、98.72%、75.79%,SBR稳定运行时对水中COD、TP和TN的平均去除率分别为91.93%、95.92%、66.28%,说明MPSR对碳、氮、磷的去除能力强于SBR,主要是MPSR的反硝化能力强于SBR。MPSR的总胞外聚合物(EPS)含量比SBR高,其中蛋白质与多糖的质量比也大于SBR,因而MPSR的污泥沉淀脱水性能更强,除磷效果更好。MPSR污泥粒径总体小于SBR,有利于提高MPSR污泥的吸附能力。MPSR和SBR的硝化能力基本相当,但反硝化能力MPSR大于SBR。

Micro-pressure swirl reactor(MPSR)is a new type of sewage treatment device developed from sequencing batch reactor(SBR).The differences between the two reactors in terms of sludge characteristics were compared particularly.Results showed that the average removal rates of COD,TP and TN in the stable operation effluent of MPSR were 93.99%,98.72%and 75.79%,respectively.The average removal rates of COD,TP and TN in the stable operation effluent of SBR were 91.93%,95.92%and 66.28%,respectively.Therefore,MPSR had higher removal capacity for carbon,nitrogen and phosphorus,since denitrification of MPSR was stronger than SBR.Extracellular polymeric substances(EPS)content of MPSR was also higher than that of SBR,in which the mass ratio of protein to polysaccharide had the same pattern,indicating that MPSR had stronger water and phosphorus removal capacity.The particle size of MPSR sludge was generally smaller than that of SBR,so the former had stronger adsorption capacity.The nitrification rates of MPSR and SBR were equivalent,but the denitrification rates of MPSR was higher.