污泥基生物炭提升活性污泥系统处理性能  

Sludge-based biochar enhances treatment performance of activated sludge systems

作　　者：赵冰 柳晓燕 李胜红 朱芬芬[1] ZHAO Bing;LIU Xiao-yan;LI Sheng-hong;ZHU Fen-fen(School of Environment&Natural Resources,Renmin University of China,Beijing 100872,China)

机构地区：[1]中国人民大学环境学院,北京100872

出　　处：《中国环境科学》2022年第7期3156-3163,共8页China Environmental Science

基　　金：国家重点研发计划(2019YFC1906501)。

摘　　要：对污泥基生物炭提升活性污泥系统处理性能进行探讨,将活性炭和污泥基生物炭分别投入A^(2)O工艺厌氧池活性污泥,发现其对COD削减率最高分别为72.9%和41.1%,均能有效削减,生物炭对TN削减率最高为74.1%,优于活性炭.表征显示污泥基生物炭上更易附着活性污泥且比表面积更大.在A^(2)O小试厌氧池中以“1次/污泥龄”为频率投加活性炭、污泥基生物炭和脱脂污泥基生物炭,结果发现:投加污泥基生物炭对COD、TN、TP的削减均优于活性炭,投加脱脂污泥基生物炭对COD、TN的削减与投加活性炭相当,对TP平均削减率高达85.6%,优于活性炭,表明生物炭处理(BT)工艺比粉末活性炭处理(PACT)工艺处理生活污水能力更强,脱脂污泥基生物炭作为污泥脂质提取后的副产品更经济.This study investigates the sludge-based biochar to enhance the treatment performance of activated sludge systems.The highest COD reduction rates of 72.9%and 41.1%were found for activated carbon and sludge-based biochar,respectively,into the activated sludge of anaerobic tank in the A^(2)O process.The highest reduction rate of TN was 74.1%,which was more effective than that of activated carbon.Characterization showed that activated sludge was more easily attached to sludge-based biochar and had a larger specific surface area.Activated carbon,sludge-based biochar and defatted sludge-based biochar were added in the anaerobic tank of A^(2)O pilot plant at the frequency of one addition per sludge age.The results showed that adding sludge-based biochar had better reduction effect on COD,TN and TP than adding activated carbon.Compared with the addition of activated carbon,adding defatted sludge-based biochar had little difference in COD and TN reduction,but the average reduction rate of TP was 85.6%,which was more effective than that of activated carbon.In conclusion,biochar treatment(BT)process is more powerful than powdered activated carbon treatment(PACT)process in treating domestic sewage,and defatted sludge-based biochar is more economical as a by-product of sludge lipid extraction.

关 键 词：污泥基生物炭 活性污泥系统 PACT工艺 A^(2)O小试 

分 类 号：X705[环境科学与工程—环境工程]