title: [Experimental determination of bacterial decay characteristics in biological wastewater treatment system].
abstract: The characteristics of cell decay in biological wastewater treatment systems were investigated under aerobic condition, by measuring the decay rate and by determining the death rate with LIVE/DEAD dyeing experiments. It was found that cell decay in biological wastewater treatment systems can be actually described as two parts: decay caused by cell death and decay derived from activity decrease. The experimental results revealed that 60% of cell decay in a nitrifying system was caused by activity decrease and 40% was caused by cell death. In a heterotrophic system, however, activity decrease was responsible for 80% of cell decay, and the other cell decay for 20% was caused by cell death.
authors.affiliation: R & D Centre for Sustainable Environmental Biotechnology, Beijing University of Civil Engineering and Architecture, Beijing 100044, China. haoxiaodi@bucea.edu.cn
authors.forename: Xiao-Di
authors.initials: XD
authors.lastname: Hao
authors.forename: Jing-Yi
authors.initials: JY
authors.lastname: Zhu
authors.forename: Xiu-Qin
authors.initials: XQ
authors.lastname: Cao
authors.forename: Ya-Li
authors.initials: YL
authors.lastname: Cao
mesh_terms: D001420:Bacteria, Aerobic / Q000254:growth & development*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D041841:Bradyrhizobiaceae / Q000254:growth & development; D015169:Colony Count, Microbial; D014865:Waste Disposal, Fluid / Q000379:methods*