[Experimental determination of bacterial decay characteristics in biological wastewater treatment system].
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.
Hao
Xiao-Di
XD
R & D Centre for Sustainable Environmental Biotechnology, Beijing University of Civil Engineering and Architecture, Beijing 100044, China. haoxiaodi@bucea.edu.cn
Zhu
Jing-Yi
JY
Cao
Xiu-Qin
XQ
Cao
Ya-Li
YL
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*