This work presents the results that were obtained in a commercial composting plant where food (149,690 kg) and yard wastes (144,520 kg) were used as raw materials for its stabilization under the aerated static pile (A...This work presents the results that were obtained in a commercial composting plant where food (149,690 kg) and yard wastes (144,520 kg) were used as raw materials for its stabilization under the aerated static pile (ASP) method as an alternative to the mechanically mixed windrow method to solve problems of flies and odor nuisance complaints. In a pile of approximately 498 m3, the change in temperature was the main parameter that was evaluated during 49 days of positive forced aeration. Subsequently, a part of the material of the ASP (62 m3) was subjected to a curing period for 44 days recording changes in temperature and humidity. The results of carbon dioxide and volatile ammonia emissions analyses (NH3) and of a bioassay to screen for the presence of phytotoxic conditions showed a very mature compost with an emergence > 90% and a seedling vigor > 95%.展开更多
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 ...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.展开更多
文摘This work presents the results that were obtained in a commercial composting plant where food (149,690 kg) and yard wastes (144,520 kg) were used as raw materials for its stabilization under the aerated static pile (ASP) method as an alternative to the mechanically mixed windrow method to solve problems of flies and odor nuisance complaints. In a pile of approximately 498 m3, the change in temperature was the main parameter that was evaluated during 49 days of positive forced aeration. Subsequently, a part of the material of the ASP (62 m3) was subjected to a curing period for 44 days recording changes in temperature and humidity. The results of carbon dioxide and volatile ammonia emissions analyses (NH3) and of a bioassay to screen for the presence of phytotoxic conditions showed a very mature compost with an emergence > 90% and a seedling vigor > 95%.
文摘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.
