污水生物处理系统细菌衰减特征的实验研究  

Experimental Determination of Bacterial Decay Characteristics in Biological Wastewater Treatment System

作　　者：郝晓地[1] 朱景义[1] 曹秀芹[1] 曹亚莉[1] 

机构地区：[1]北京建筑工程学院可持续环境生物技术研发中心,北京100044

出　　处：《环境科学》2008年第11期3104-3109,共6页Environmental Science

基　　金：国家自然科学基金项目(50678017);荷兰皇家科学院国际合作项目(03CDP008);北京市属市管高等学校人才强教计划项目(BJE10016200611)

摘　　要：通过衰减速率测定实验和LIVE/DEAD细胞活性染色实验,分析了污水生物处理系统中细菌在好氧环境下的衰减状态.研究发现,细菌的衰减实质上是由生物量减少引起的数量衰减和由细胞活性降低引起的活性衰减两部分构成的.结果表明,硝化系统细菌在衰减过程中由细胞活性降低引起的衰减约占60%,由细胞死亡引起的衰减约占40%;而在异养系统中由活性降低引起的衰减和由细胞死亡引起的衰减分别为80%和20%.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.

关 键 词：污水生物处理 细胞衰减 细胞死亡 活性降低 LIVE/DEAD染色 

分 类 号：X172[环境科学与工程—环境科学]