Water Practice and Technology (Mar 2023)
Evaluation of aquatic phytoremediation technologies in urban black–odorous water remediation technology using a multi-level fuzzy analysis method
Abstract
The comprehensive analysis and research on the selection and evaluation of technology for urban black and odorous water remediation have not yet formed a complete system, and the technical analysis and comparison of the remediation technology are not combined with the characteristics of the river and the pollution status, which often could not achieve the expected effect. Combining the multi-level index division and fuzzy weight matrix calculation method, this paper establishes a comprehensive evaluation method for urban black–odorous water treatment technology based on multi-level fuzzy analysis. The proposed method was applied to assess four kinds of in situ purification-aquatic plant remediation technologies. The results showed that the pollutants removal efficiency of a submerged plant was much higher than that of an emergent aquatic plant, floating-leaved water plant and floating plant. Meanwhile, according to the evaluation model, the comprehensive grading order of in situ purification-aquatic plants was as follows: emergent aquatic plant (84.2044) > submerged plant (78.838) > floating-leaved water plant (72.7596) > floating plant (66.4312). The calculations indicated that the ecological restoration project of black and odorous water should build an ecological restoration technology system based on in situ purification-submerged plant remediation technology, supplemented by other three types of aquatic phytoremediation technologies. HIGHLIGHTS This study establishes a comprehensive evaluation method for urban black–odorous water treatment technology based on multi-level index division and fuzzy weight matrix calculation.; The black–odorous water treatment technology was divided into six categories.; The ecological restoration project of black and odorous water should be constructed mainly by in situ purification-submerged plant remediation technology.;
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