MODELING FECAL-COLIFORM BACTERIA .1. FIELD AND LABORATORY DETERMINATION OF LOSS KINETICS
MODELING FECAL-COLIFORM BACTERIA .1. FIELD AND LABORATORY DETERMINATION OF LOSS KINETICS
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DOI：
10.1016/0043-1354(93)90179-l
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发表时间：
1993-04-01
期刊：
影响因子：
12.8
通讯作者：
NIEHAUS, SL
中科院分区：
文献类型：
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作者：
AUER, MT;NIEHAUS, SL
地表径流中的排泄物、下水道溢流和点源排放对地表水的污染是许多城市环境中的一个重要水质问题。进行了实地和实验室研究，以开发和验证模拟湖泊中粪大肠菌群死亡[由辐射(光)和温度]和沉积作用引起的损失所需的动力学表达式和伴随系数。用过滤过的湖水稀释原污水，建立了20℃时的暗死亡率系数(k(D)=0.73d-1)。暗死亡率系数与温度(theta=1)的关系不一致。在使用透析管技术的原始污水的水柱孵化中，照度中介死亡率(k(I))与照度(I)成正比：k(I)=αi；α=0.00824 cm2 cal-1。沉降率(1.38md-1)是通过测定粪大肠菌群与不同大小的颗粒物的关联度和用沉积物捕捉器测量这些颗粒物的沉降率来量化的。将单个损失项组合成一个单一的预测表达式，可用于模拟湖泊中的粪大肠菌群动态。
Contamination of surface waters through the discharge of fecal material in surface run-off, combined sewer overflows and point source discharges is an important water quality problem in many urban environments. Field and laboratory studies were conducted to develop and verify the kinetic expressions and attendant coefficients required to simulate the loss of fecal coliform bacteria in lakes due to death [as mediated by irradiance (light) and temperature] and sedimentation. The dark death rate coefficient at 20-degrees-C (k(d) = 0.73 d-1) was established in laboratory experiments utilizing raw sewage diluted with filtered lake water. No consistent relationship was observed between the dark death rate coefficient and temperature (theta = 1). The irradiance-mediated death rate (k(i)) was shown to be proportional to irradiance (I) in water column incubations of raw sewage using a dialysis tube technique: k(i) = alphaI; alpha = 0.00824 cm2 cal-1. The settling loss rate (1.38 m d-1) was quantified by determining the association of fecal coliform bacteria with particles of various size classes and measuring the sedimentation rate for those particle classes using sediment traps. Individual loss terms are combined into a single predictive expression which may be used to simulate fecal coliform bacteria dynamics in lakes.