Correlating Fecal Coliform Measurements and Odors in Biosolids Cake to Digester Performance Parameters
Abstract:The Southwest Water Pollution Control Plant (SW WPCP) of the Philadelphia Water Department is the one facility used by the Water Environment Research Foundation (WERF) in both research studies linking performance of single-stage mesophilic anaerobic digesters with characteristics of biosolids odor generation and of fecal coliform reactivation and regrowth. This paper reports on the statistical treatment of the operational records of the digesters and centrifuges at its SW WPCP and the adjoining centralized dewatering facility, the Biosolids Recycling Center (BRC), against the corresponding fecal coliform and odor databases. This review confirms the WERF study report conclusions: 1) no correlation is seen between variation in volatile solids destruction and the variation in odorant intensity of the biosolids or the variation in geometric mean of fecal coliform; 2) no correlation is seen between the variation in time-temperature performance over the study period and variations in odor intensity and fecal coliform density.
Document Type: Research Article
Publication date: September 1, 2007
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