Extraction of protein from excess sludge by enzymatic hydrolysis

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Qin, L.^1 ; Yan, Y.X.^1 ; Gao, J.L.^1 ; Miao, C.Y.^1

School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou, Henan, China^1

关键词: Enzyme dosage;    Enzymolysis;    Excess sludge;    Protein extraction;    Sludge dewatering;    Specific resistances;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012069/pdf
DOI  :  10.1088/1755-1315/191/1/012069

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The effects of enzymatic hydrolysis on the extraction of sludge protein and the sludge dewatering performance were investigated. Results showed that the enzymatic hydrolysis effectively extracted protein and improved the sludge dewatering. The most effective condition for protein extraction was as following: enzyme dosage of 2%, enzymolysis time of 4h, temperature of 55°C, pH of 8 and sludge moisture content of 94%. The maximum protein extraction rate was 58%, and the specific resistance of sludge (SRS) reduced from 1.7 × 1010 S2/g to 1.050 109 S2/g.