This research focuses on decentralized wastewater treatment (DEWAT) technologies for the Philippines that is motivated by the limited suitable wastewater treatment infrastructure in the country. A multi-criteria analysis (MCA), using the Analytic Hierarchy Process (AHP) and Delphi method, was employed to evaluate DEWAT technologies based on life cycle costs and wastewater treatment efficiency parameters such as CODt, BOD5, TSS, NH4-N, TP, and hydraulic retention time. A two-factor Analysis of Variance (ANOVA) without replication was used to assess statistical differences between technologies. The analysis revealed that the Downflow Hanging Sponge (DHS) filter, Multi-Soil Layering (MSL) systems, and Moving Bed Biofilm Reactors (MBBRs) are the top-performing technologies, with no statistically significant differences in their overall performance. The DHS filter ranked highest, excelling in energy efficiency and nutrient removal, making it ideal for resource-scarce environments. MSL systems were noted for their broad-spectrum contaminant removal, while MBBRs demonstrated flexibility and scalability for semi-urban areas. A thorough analysis is carried out for these DEWAT technologies and insights for applicability in the Philippine context are provided.

翻译：本研究聚焦于菲律宾的分散式污水处理技术，其动因在于该国适宜的污水处理基础设施有限。研究采用多准则分析方法，结合层次分析法和德尔菲法，基于生命周期成本及化学需氧量、五日生化需氧量、总悬浮固体、氨氮、总磷、水力停留时间等污水处理效率参数，对分散式污水处理技术进行评估。通过无重复双因素方差分析检验技术间的统计差异。分析表明：下流式悬挂海绵过滤器、多层土壤处理系统和移动床生物膜反应器是综合表现最优的技术，三者整体性能无统计学显著差异。其中下流式悬挂海绵过滤器排名居首，其在能耗效率与营养盐去除方面表现突出，适用于资源匮乏环境；多层土壤处理系统以广谱污染物去除能力见长；移动床生物膜反应器则在半城市化区域展现出良好的适应性与扩展性。本研究对这些分散式污水处理技术进行了系统分析，并就其在菲律宾情境下的适用性提出了见解。