含炭沉淀池污泥回流工艺强化高有机物水源水处理

Sludge Containing Powdered Activated Carbon from Sedimentation Recycling Technology for Enhanced NOM Removal in Drinking Water Treatment

针对重庆某高有机物水源水,采用新型含炭沉淀池污泥回流工艺进行了中试研究,分析了进出水有机物特性和含炭沉淀池污泥生物特征,并与混凝/沉淀工艺进行了对比。结果表明,混凝/沉淀工艺对COD_(Mn)和UV_(254)的去除率分别为18.67%~23.24%和24.49%~31.25%,含炭沉淀池污泥回流工艺比混凝/沉淀工艺大幅提高了对COD_(Mn)和UV_(254)的去除效果,其去除率分别为35.58%~41.88%和38.78%~48.32%。含炭沉淀池污泥培养7~8 d后完成了生物富集,生物量达到100 nmol P/m L左右。由于炭泥中含有大量微生物,含炭沉淀池污泥回流工艺对亲水性、小分子质量有机物组分的去除效果更好。

Sludge recycling technology with powdered activated carbon（PAC） from sedimentation was used to treat source water with high NOM concentration in a pilot scale study. NOM removal and or- ganic characteristics of inlet and outlet of the sludge recycling technology were measured and compared with traditional coagulation/sedimentation treatment. Results showed that CODMn and UV254 removal was 18.67% - 23. 24% and 24.49% - 31.25%, respectively. By using sludge recycling technology, CODMn and UV254 removal were raised to 35.58% -41.88% and 38.78% -48.32%, respectively. Bio- mass in the powdered activated carbon-containing sludge reached a steady state at about 100 nmolP/mL after 7 - 8 days recycling. Due to the biodegradation effects, more hydrophilic and low molecular portions of NOM were effectively removed by the sludge recycling technology.