Poly aluminum chloride (PAC) enhanced formation of aerobic granules:Coupling process between physicochemical–biochemical effects

Release time:2024-08-09  Hits:

• Affiliation of Author(s):环境与市政工程学院
• Journal:Chemical Engineering Journal
• Key Words:中文关键字：好氧颗粒污泥；聚合氯化铝；EPS，英文关键字：Aerobic granular sludge；Enhanced formation；Poly al
• Abstract:Transforming conventional flocculent sludge to aerobic granular sludge is drawing increasing global interest in a quest for an efficient and innovative technology in wastewater treatment. However, long start-up time and low granule stability are the main challenging issues for its application. In this study,long-term and short-term PAC feeding strategies were applied in parallel to enhance the sludge granulation and with the aim to figure out the temporal effect of PAC during the whole process. Nevertheless,both of them identified to allow a rapid start-up formation of aerobic granules with better performances in physicochemical characteristics. More extracellular polymeric substances (EPS) were secreted in all PAC-fed reactors, especially for polysaccharides. By using enzymatic hydrolysis, factors which account for the flocculating ability and stability of granules were identified. Notably, the correlation between them was also revealed. Based on these findings, dosage of PAC played a positive role mainly during the start-up period (first 15 days) of the aerobic granules formation, extending its dosing time made no significant sense. The granules formed under this condition were the result of physicochemical–bio chemical effects coupling process.
• Note:刘永军
• First Author:王晓昌,liuyongjun,liuzhe
• Indexed by:Journal paper
• Volume:卷：284
• Issue:期：1
• Page Number:页：1127-1135
• Translation or Not:no
• Date of Publication:2015-10-01