Dominance of yeast in activated sludge under acidic pH and high organic loading.
作者： S. Zheng , Y. Zhang , T. Tong , C. Cui , J. Sun
DOI: 10.1016/J.BEJ.2010.09.007
关键词: Microorganism 、 Microbial population biology 、 Yeast 、 Environmental chemistry 、 Activated sludge 、 Environmental engineering 、 Chemical oxygen demand 、 Sewage treatment 、 Industrial wastewater treatment 、 Biology 、 Wastewater
摘要: Abstract Flow cytometry-fluorescent in situ hybridization (FC-FISH) was used to investigate the effect of controlled pH and/or varied organic loading on content yeast and bacterial cells an activated sludge system (AS) individually operating continuous batch mode for treatment high-strength industrial wastewater. Specifically, we attempted develop a yeast-predominant (Y-AS). For batch-mode AS, bacteria-dominated AS (B-AS) obtained at 6.5–7.5 induced higher chemical oxygen demand (COD) removal than Y-AS acidic (5.0–6.0 4.0–5.0). continuous-mode COD loadings 2.5–2.8 kg COD m−3 d−1, it difficult achieve solely by controlling level 7.0 5.1 then 4.1 because bacteria stably accounted greater 98% total cells, regardless levels. Therefore, effects (2.1, 8.7 21.0 kg COD m−3 d−1) operation (4.5) investigated. Both high levels were found be prerequisites dominate microbial community AS.
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