Abstract:Partial residual sludge from a sequential batch reactor (SBR), after mixed with lysozyme, was fed back to the SBR. The effects of the lysozyme on sludge reduction and sludge characteristics in the SBR system were evaluated through the comparative observation of the sludge in a reference SBR without lysozyme addition. Experimental results showed that the lysozyme could effectively reduce the production of excess sludge by 76.29% in the test SBR system during 50 days operation. The average removal efficiency of chemical oxygen demand and ammonia-N in the SBR with lysozyme addition was almost the same as that in the reference system, which were 88.12% and 69.05% respectively, but the average TP removal decreased by 17.2% in the lysozyme added system comparing with the reference one. It was further found that after treated with lysozyme, microbial activity of the sludge was enhanced, the specific oxygen uptake rate (SOUR) was elevated by 35%, and the average ATP value was improved by 3.12nmol/mgMLSS comparing with that of the reference system.
宋勇, 施周, 陈世洋, 罗璐. 水解溶菌酶污泥减量过程中的污泥特性[J]. 中国环境科学, 2012, 32(6): 1007-1010.
SONG Yong, SHI Zhou, CHEN Shi-Yang, LUO Lu. Characterization of activated sludge in a sludge reduction process using lysozyme. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(6): 1007-1010.