Kinetics of pathogen destruction during storage of dewatered
biosolids The kinetics of pathogen destruction were determined
during storage of digested and dewatered wastewater treatment
biosolids to obtain relationships between temperature and
duration of biosolids storage. Biosolids, seeded with Salmonella
typhimurium, Yersinia enterocolitica, Campylobacter jejuni,
bacteriophage f2, poliovirus, and Ascaris suum eggs were
incubated at 5°, 22°, 38°, and 49.5°C, under both aerobic and
anaerobic conditions for up to 62 days. Destruction of pathogens
in stored biosolids occurred at all temperatures examined;
however, rates increased with increasing temperature. There was
no significant difference between the destruction of pathogens
under aerobic or anaerobic conditions at all temperatures
studied. At 50°C, the decay rate of S. typhimurium, Y.
enterocolitica, bacteriophage f2, poliovirus, and A. suum eggs
was estimated to be 1.13, 1.10, 1.54, 0.81, and 0.21 log10
reductions per day, respectively.