Synergistic strengthening mechanism of hydraulic selection pressure and poly aluminum chloride (PAC) regulation on the aerobic sludge granulation.
作者： Zhe Liu , Ning Li , Min Gao , Jiaxuan Wang , Aining Zhang
DOI: 10.1016/J.SCITOTENV.2018.08.389
关键词: Extracellular 、 Flocculation 、 Biophysics 、 Volatile suspended solids 、 Granulation 、 Extracellular polymeric substance 、 Aerobic granulation 、 Chemistry 、 Chloride 、 Granule (cell biology)
摘要: This study aimed to enhance aerobic granulation by the integration of hydraulic selection pressure (HSP) and poly aluminum chloride (PAC) regulation. Based on an investigation sludge characteristics, microbial aggregation extracellular polymeric substances (EPS) secretion, synergistic mechanisms HSP PAC regulation were revealed. For granule formation, primarily improved cell hydrophobicity protein production, while markedly neutralized surface charge cells reduced interaction energy between them. In addition, biomass retention was also facilitated dosing. Notably, results total flocculating ability imply that prior screening could significantly promote aggregation. To optimize balance formation reactor performances, five kinds integrated strategies for conducted in batch test. According results, 4.3 g/L initial mixed liquor volatile suspended solids (MLVSS) preferred before addition PAC.
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