EVALUATION OF THE HYGIENISATION EFFECTIVENESS OF MUNICIPAL WASTE COMPOSTING PROCESS
Background. The aim of the study was to determine the hygienisation efficiency of the municipal waste composting process based on the inactivation rate of the bacteria Salmonella Senftenberg W775 H2S- and Ascaris suum eggs.
Material and methods. The research was conducted in a composting plant located in northern Poland. The processed material was organic waste (kitchen waste) consisting of food waste (plant origin – approx. 50%, animal origin – approx. 20%) and grass and leaves (approx. 10%). Temperature generated in the compost heap was measured using a sensor in its upper part and a mobile probe.
Results. The fastest elimination of Salmonella bacilli occurred after 18.5 hours in the upper part of the compost heap. In the middle part of the pile bacteria were not isolated after 24 hours, whereas at the bottom – after 48 hours. In the lateral part of the compost heap Salmonella were not isolated after 65 hours of composting process. Total inactivation of Ascaris suum eggs occurred after 18.5 hours in the middle part of the heap and 89 hours in the lateral part.
Conclusion. Obtained results confirm the higienisation potential of the process of municipal waste composting in terms of inactivating pathogens. A correct course of the process guarantees microbiological safety of the final product use for agricultural purposes.