负荷对高盐污泥氧化硫硫杆菌调理系统脱水效能的影响

Effect of Load on Dewatering Efficiency of High Salinity Sludge Conditioning System with Acidithiobacillus thiooxidans

针对高盐废水生物处理产生的剩余污泥脱水性能差的问题,构建高盐污泥氧化硫硫杆菌调理系统,并研究负荷对系统深度脱水效能的影响。结果表明,在负荷分别为0. 5、1. 0、1. 5gMLSS/(L·d)时,反应器内污泥的p H值由调理前的3. 86下降至调理后的1. 46、1. 99、2. 38;泥饼的含水率由70. 1%降至60. 3%、61. 8%、64. 3%,污泥结合水含量从8. 41 g/gDS降至1. 21、1. 28、1. 34 g/gDS;胞外聚合物(EPS)含量从93. 22 mg/gVSS降至16. 35、17. 45、19. 64 mg/gVSS。负荷对污泥EPS中的LB-EPS含量影响并不显著,但对TB-EPS含量的影响显著。

In view of poor dewatering performance of residual sludge produced by biological treatment of high salinity wastewater,the high salinity sludge conditioning system with Acidithiobacillus thiooxidans was constructed,and the effect of load on deep dewatering efficiency of the system was investigated.When the load was 0.5 gMLSS/(L·d),1.0 gMLSS/(L·d)and 1.5 gMLSS/(L·d),the p H value of the reactor decreased from 3.86(before conditioning)to 1.46,1.99 and 2.38,respectively.Water content of the sludge cake decreased from 70.1%to 60.3%,61.8%and 64.3%.Bound water content of the sludge decreased from 8.41 g/gDS to 1.21 g/gDS,1.28 g/gDS and 1.34 g/gDS.Extracellular polymeric substance(EPS)content decreased from 93.22 mg/gVSS to 16.35 mg/gVSS,17.45 mg/gVSS and 19.64 mg/gVSS.The effect of load on LB-EPS content was not significant,but it had a significant effect on content of TB-EPS.