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The process options for control of pathogens in the windrow and ASP (aerated static pile) are considered based on indicator organisms for the incoming pathogens with MSW and sludge as feedstock. Some European process requirements for sanitisation are considered in relation to the actual conditions within a composting mass where temperatures across the mass vary from 70℃ to ambient. Improved control methodologies for the ASP using combinations of suck and blow are discussed together with short term use of elevated core temperatures (>70℃). The generation of Aspergillus fumigatus during composting is considered in relation to reducing the numbers in the windrow by changing the operating regime.
The process options for control of pathogens in the windrow and ASP (aerated static pile) are considered based on indicator organisms for the incoming pathogens with MSW and sludge as feedstock. Some European process requirements for sanitisation are considered in relation to the actual conditions within a composting mass where temperatures across the mass vary from 70 ° C to ambient. Improved control methodologies for the ASP using combinations of suck and blow are discussed together with short term use of elevated core temperatures (> 70 ° C). The generation of Aspergillus fumigatus during composting is considered in relation to reducing the numbers in the windrow by changing the operating regime.