Enrichment and characterization of a psychrophilic ‘Candidatus Accumulibacter phosphatis’ culture
作者： W.D. Tian , C. Ma , Y.M. Lin , L. Welles , C. Lopez-Vazquez
DOI: 10.1016/J.IBIOD.2017.03.030
关键词:
摘要: Abstract Enhanced Biological phosphorous removal (EBPR) processes, often operated at low temperatures, are utilised world-wide, but currently little is known regarding enrichment cultures and the characteristics of active organisms (“Candidatus Accumulibacter phosphatis” (Accumulibacter)) under psychrophilic conditions. This study assesses long-term performance, metabolic activity, microbial community sludge morphology in an EBPR enriched from activated 10 °C. Long solid retention times (SRT) temperatures resulted dominance type II over I. Despite changes community, P-removal efficiencies did not show obvious differences although no specific measures were implemented, Accumulibacter-PAO culture formed stable dense granules. A high level Alginate-like exopolysaccharides (ALE) observed, with a large number Guluronic acid-Guluronic acid (GG) blocks derived biomass characteristic favors granulation, increasing mechanical strength granules formed, which encourages solid-liquid separation consequently, contributes to operation systems.
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