title: [Effects of nitrogen on performance and yeast morphology of yeast-SBR system].
abstract: Effects of nitrogen on yeast cell morphology, settleability and performance of wastewater treatment were investigated in treating oil-containing wastewater by yeast-SBR system. The results show that: nitrogen supply affects directly yeast biomass, settleability, pH and treatment efficiency of system; the absence of nitrogen induces the transformation of certain yeast cells from single cell to hypha morphology. Based on an overall consideration of efficiency and stability of yeast-SBR system, the optimum BOD/N ratio of influent is 20/1. The optimum nitrogen supply can improve wastewater treatment efficiency of systems with different degrees of nitrogen absence and make yeast morphology become the predominant morphology for slightly mycelial system over a short time, but for severe mycelial system, the hypha morphology still keeps dominant.
authors.affiliation: Department of Environmental Engineering, College of Architectural Civil Engineering and Environment, Ningbo University, Ningbo 315211, China. luwenzhou@nbu.edu.cn
authors.forename: Wen-Zhou
authors.initials: WZ
authors.lastname: Lü
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.forename: He-Ping
authors.initials: HP
authors.lastname: Chen
authors.forename: Jian-Lin
authors.initials: JL
authors.lastname: Zhu
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D006863:Hydrogen-Ion Concentration; D025301:Hyphae / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D009584:Nitrogen / Q000494:pharmacology*; D014865:Waste Disposal, Fluid / Q000379:methods*; D015003:Yeasts / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism
chemical_list: D009584:Nitrogen