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Citation: . Application of Improved Analytic Hierarchy Process in the Selection of Wastewater Treatment Process[J]. Chemistry, ;2018, 81(6): 555-561. shu

Application of Improved Analytic Hierarchy Process in the Selection of Wastewater Treatment Process

Received Date: 23 November 2017
Accepted Date: 6 March 2017

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In the selection of biological wastewater treatment process, the scientificity and maneuverability of the traditional analytic hierarchy are low. The improved AHP method adopts three scale method, and the judgment matrix is easy to construct; furthermore, there is no need to check the consistency. In the present study, the improved AHP was applied to establish a comprehensive evaluation system with four layers, 10 indexes and four schemes. The comprehensive evaluation system was employed to analyze the economic benefits, the environmental impacts and the technical performance of four wastewater treatment process, i.e., MBR, A²/O, A/O and oxidation ditch process. The calculated results of the evaluation formula for MBR, A²/O, A/O and oxidation ditch process were 0.3137, 0.3379, 0.2085 and 0.1552, respectively. Therefore, comprehensively considering the economic benefits, the environmental impacts and the technical performance, A²/O is the most suitable biological wastewater treatment process for Northeast China, followed by the MBR process and A/O process, and oxidation ditch is the least recommended process. In conclusion, the improved AHP method could make a direct evaluation on the economic benefits, the environmental impacts and the technical performance of the current wastewater treatment process, which could provide theoretical and practical basis for the operation and management of the current process and the design of new process.
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