ZHENGKai-kai,ZHIYao,WANGShuo,et al.Characteristics of Biosorption and A2O Combined Process and Increment of Protein Source Sludge[J].China Water & Wastewater,2022,38(15):109-114.
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Characteristics of Biosorption and A2O Combined Process and Increment of Protein Source Sludge

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 第15期 Page: 109-114 Column: Date of publication: 2022-08-01
Author(s):
ZHENG　Kai-kai1;  ZHI　Yao1;  WANG　Shuo1; 2; 3;  ZHANG　Guang-sheng1; 2; 3;  LI　Ji1; 2; 3
（1. School of Environment and Civil Engineering， Jiangnan University， Wuxi 214122， China； 2. Jiangsu Key Laboratory of Anaerobic Biotechnology， Wuxi 214122， China； 3. Jiangsu University Collaborative Innovation Center of Water Treatment Technology and Material， Suzhou 215009， China）
Keywords:
biosorption;  assimilation/dissimilation of nitrogen;  organic matter content of sludge;  protein
Abstract:
Operational characteristics and incremental potential of protein source sludge based on biosorption and A2O combined process were investigated to recover proteins from activated sludge. The interception of residual inorganic particles in influent and the adsorption of particulate organic matter in the biological adsorption process led to the subsequent A2O process lack of carbon source and TN, TP and other water quality indicators exceeding the discharge standard. In addition, the increase in organic matter content and sludge quantity was small, and the assimilation/dissimilation of nitrogen in influent was only approximately 20%. The high-quality carbon source generated by anaerobic fermentation of excess sludge in the biosorption process was added to the subsequent A2O treatment process to ensure the quality of effluent and promote the increment of sludge. The overall carbon source utilization of the biological process was improved, the microbial activity was significantly increased, and high?quality effluent quality was obtained, of which ammonia nitrogen, TN and TP were less than 1 mg/L, 3 mg/L and 0.3 mg/L, respectively. Organic matter content and sludge quantity increased significantly, the assimilation/disassimilation of nitrogen reached approximately 50%, and the protein content increased from 341.2 mg/gMLSS to 406.3 mg/gMLSS, indicating that a growth rate of 19.1% was achieved. Elemental analysis showed that the mass fraction of nitrogen increased from 4.96% to 6.71%, which further confirmed the significant increase of protein content in the sludge.
Last Update: 2022-08-01