IHE Delft Institute for Water Education, Westvest 7, 2611 AX Delft, The Netherlands E-mail:
Eco Concern Pvt. Ltd, Khumaltar-14, Lalitpur, Nepal.
Water Sci Technol. 2020 Dec;82(11):2220-2233. doi: 10.2166/wst.2020.456.
A majority of the world's population use onsite sanitation systems, which store or treat excreta close to where it is generated. Sludge from these systems needs to be managed through a series of stages, known as the sanitation value chain. There is a huge diversity of service providers, not only within each part of the chain, but also along the chain bridging the different components. These service providers are linked not only by the flow of materials, but also by the transfer of money. Therefore for this system to be considered financially sustainable all services from the toilet to reuse or disposal need to be considered. A tool has been developed (eSOSView) to simulate, evaluate, and optimise the financial flows along and within the sanitation value chain. In this paper eSOSView™ was tested, validated (using existing data), and piloted (including data collection). This paper demonstrates how eSOSView ™ can be used to evaluate different financial flow models, to assess financial sustainability in different parts of the sanitation value chain and optimise the financial sustainability along the sanitation value chain.
世界上大多数人使用现场卫生系统，这些系统将粪便储存在或处理在产生的地方附近。这些系统的污泥需要通过一系列阶段进行管理，这些阶段被称为卫生价值链。服务提供商的种类繁多，不仅在价值链的每个部分内，而且在连接不同组件的价值链上也存在差异。这些服务提供商不仅通过物质流联系在一起，还通过资金流联系在一起。因此，为了使该系统在财务上可持续，从厕所到再利用或处置的所有服务都需要考虑。已经开发了一种工具（eSOSView）来模拟、评估和优化卫生价值链内外的资金流。本文测试、验证了 eSOSView（使用现有数据）并进行了试点（包括数据收集）。本文展示了如何使用 eSOSView 来评估不同的财务流动模型，评估卫生价值链不同部分的财务可持续性，并优化卫生价值链的财务可持续性。
