Inactivation of Poliovirus 1,as a Function of Temperature,in Mixed Human and Dairy Animal Wastes

Abstract

Mixing septic tank effluent with stored animal waste for discharge to land has been proposed as an alternative on-site sewage treatment and disposal method. Potential hazards to public health include parasites, bacteria, and viruses. The inactivation of a human enteric virus (poliovirus 1) was studied in a laboratory model simulating the storage of septic tank effluent combined with dairy animal waste. D values (times for 90% reduction of titer) at 5, 15 and 25°C for inoculated poliovirus 1 were 102, 71 and 22 days in phosphate-buffered saline; 80, 72 and 19 days in septic tank effluent; and 19, 20 and 17 days for septic tank effluent mixed with dairy manure slurry. Temperature and the mixed waste treatment appear to be the dominant factors in viral inactivation in these experiments.

Keywords

Septic tank effluent dairy animal waste slurry mixed wastes land disposal human enteric viruses viral inactivation alternative wastewater disposal public health U.S.A.

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