Selection of Municipal Wastewater Treatment Process Based on Improved Analytic Hierarchy Process

Abstract

The improved AHP (analytic hierarchy process) method adopts three scale method. Compared with traditional AHP, it is more scientific and operational. This paper uses improved AHP to establish an evaluation system with 4 layers, 8 indexes and 5 schemes for analysing the technical performance, the economic benefit and the environmental impact of 5 municipal wastewater treatment process. The results show that the total results of oxidation ditch process, improved AAO process, multi-mode AAO process, MBR process and SBR process are 0.7718, 0.3145, 0.1628, 0.3243 and 0.3678. Considering the technical performance, the economic benefit and the environmental impact, multi-mode AAO process is the most suitable process and oxidation ditch process is the least recommended process.