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环境科学  2008 

Experimental Determination of Bacterial Decay Characteristics in Biological Wastewater Treatment System
污水生物处理系统细菌衰减特征的实验研究

Keywords: biological wastewater treatment,cell decay,cell death,activity decrease,LIVE/DEAD dyeing
污水生物处理
,细胞衰减,细胞死亡,活性降低,LIVE/DEAD染色

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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.

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