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Building a Framework for Estimating Economic Burden from Human Pathogenic Risk and GHG emissions in Decentralized Sanitation System

Among sanitation systems, which are multi-level barriers for the safe management of excreta, those without sewage systems and managed on-site are called decentralized systems and are widely used in developing countries. In decentralized systems, human intervention during sludge withdrawal increases the risk of human pathogens. To reduce those risk to an acceptable level, it is necessary to naturally kill pathogenic microorganisms in excreta by long-term storge in a pit. On the other hand, excreta generates greenhouse gases along with long-term storage. Therefore, the objective of this study is building a framework for estimating the economic burden by deriving the relationship between the storage period in the pit, human health risk, and greenhouse gas emissions, and converting them to costs.