Optimal Selection of Sewage Treatment Technologies in Town Areas: A Coupled Multi-Criteria Decision-Making Model
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Optimal Selection of Sewage Treatment Technologies in Town Areas: A Coupled Multi-Criteria Decision-Making Model Ben Liu1 Jie Tang1,2,3 Zhaoyang Li ●
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Yu Yan4 Jingshu Chen1 ●
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Received: 25 February 2020 / Accepted: 13 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In recent years, the development of sewage treatment technologies has made many treatment options available in towns. Selecting the most appropriate alternative (MAA) can make the best use of existing resources to achieve the optimal effect, which has become a topical issue in academic circles. The Liao River basin in China is an important area for agricultural cultivation and animal husbandry, but it also suffers from water shortages and pollution. In this study, the fuzzy set theory (FST), the Analytic Hierarchy Process (AHP), and the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) were combined as a scientific and effective multi-criteria decision-making (MCDM) model to optimize the sewage treatment technologies in town areas of the Liao River basin. It was found that compared with natural treatment technologies (such as constructed wetlands, stabilization ponds, etc.) and combination technologies (i.e., a combination of various technologies), single small-scale sewage treatment plant technologies (such as activated sludge process or sequencing batch reactor with small daily capacity) were more suitable for those areas. The indicator of construction costs was critical in this model, and the fluctuation of its weight might change the MAA. This study aims to provide a decision support framework for the future optimization of sewage treatment technologies in towns by combining economic, environmental, and social issues, rather than just focusing on the technical aspects. Keywords Multi-criteria decision-making Sewage treatment TOPSIS AHP Triangular fuzzy number Town ●
Introduction In densely populated cities, the centralized sewage treatment system can reuse or transport sewage out of residential areas to solve sanitation problems (Otterpohl et al. 2003). However, such a system cannot be used in towns, where there is no complete pipeline network system. The quantity of sewage here is small and fluctuating, which is difficult to
* Zhaoyang Li [email protected] 1
College of New Energy and Environment, Jilin University, Changchun 130012, China
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Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
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Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China
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China Northeast Municipal Engineering Design and Research Institute Co., Ltd, China’s Ministry of Construction, Changchun 130021, China
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manage and maintain. Town sewage treatment systems should focus on meeting local needs, which require less expensive and easy-to-operate treatment technologies. Decentralized approaches are preferred, and academic ci
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