关键词: 污水处理项目, PPP模式, OWA算子, 灰靶理论, 模式选择

Abstract: Selecting the most suitable PPP mode can improve the success rate of the sewage treatment projects. Firstly, by analyzing the characteristics of sewage treatment projects and PPP mode, seven PPP modes were selected. Secondly, from view of the government, a comprehensive index system for PPP mode selection for sewage treatment project was established from five aspects of project features, project risks and benefits, the government and the cooperation environment, characteristics of social capital, ownership. OWA operator method was used to calculate the index weight, gray target decision theory was introduced to construct the PPP mode selection mode of the sewage treatment project. Seven modes were ranked by the bull's-eye degrees. Finally, a sewage treatment project in the cultural and sports functional area of Xianyang City was taken as an example for verification. The results show that the mode has strong feasibility and guidance, which can provide references for selection of PPP mode of sewage treatment projects.

Key words: waste water treatment project, public-private-partnership (PPP), ordered weighted averaging (OWA) operator, gray target theory, mode selection