LIN Jia-qi,YAOYi,WANGLong,et al.Current Situation of In-situ Enzymatic Sludge Reduction[J].China Water & Wastewater,2022,38(22):28-34.
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Current Situation of In-situ Enzymatic Sludge Reduction

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 第22期 Page: 28-34 Column: Date of publication: 2022-11-17
Author(s):
LIN Jia-qi1; 2; 3;  YAO　Yi1; 2; 3;  WANG　Long4;  XU Yu-feng1; 2; 3;  WANG Dun-qiu1; 2; 3
（1. College of Environmental Science and Engineering， Guilin University of Technology， Guilin 541006， China； 2. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology， Guilin 541004， China； 3. Guangxi Modern Industry College of Ecology and Environmental Protection， Guilin 541004， China； 4. Chongqing Academy of Metrology and Quality Inspection， Chongqing 401123， China）
Keywords:
sludge reduction;  extracellular enzyme;  enzymatic;  EPS;  enhanced method
Abstract:
Biotechnology is a mainstream process in the field of urban sewage treatment. During the operation process, a large amount of excess sludge will be generated. The disposal of the excess sludge has become an urgent environmental problem. This article reviews the in-situ reduction of enzymatic sludge, and believes that extracellular enzymes can promote the hydrolysis of dead microbial residues in sludge, and then reinforce the reduction of recessive growth sludge. Based on the review of the distribution of enzymes in sludge flocs, this work suggests that extracellular polymeric substance(EPS) is an important factor that hinders in-situ enzymatic sludge reduction. Thus, the key to enhanced enzymatic production is to break the sludge flocs which could be achieved by existing enzymatic processes such as sonication, radiation, and low-temperature pyrolysis. In addition, some improvement processes such as enzymatic complexing, radiation, and reverse sulfidation can directly increase the activity of the enzyme and strengthen the in-situ sludge reduction.
Last Update: 2022-11-17