Study on a comprehensive evaluation method for the assessment of the operational efficiency of wastewater treatment plants

A fuzzy matter-element model, combined with the entropy weight of an index, has been used as an evaluation method to achieve a comprehensive assessment and analysis of the operational efficiency of wastewater treatment plants (WWTPs). The feasibility of the method had been validated based on actual...

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Bibliographic Details
Published in:Stochastic environmental research and risk assessment 2013-03, Vol.27 (3), p.747-756
Main Authors: Hao, Rui Xia, Liu, Feng, Ren, Hui Qin, Cheng, Shui Yuan
Format: Article
Language:English
Subjects:
Aquatic Pollution
Chemistry and Earth Sciences
Computational Intelligence
Computer Science
Earth and Environmental Science
Earth Sciences
Environment
Environmental research
Fuzzy logic
Math. Appl. in Environmental Science
Nitrogen
Original Paper
Physics
Probability Theory and Stochastic Processes
Risk assessment
Sludge
Sludge cake
Statistics for Engineering
Stochastic models
Waste Water Technology
Wastewater treatment plants
Water Management
Water Pollution Control
Water treatment plants
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Summary:A fuzzy matter-element model, combined with the entropy weight of an index, has been used as an evaluation method to achieve a comprehensive assessment and analysis of the operational efficiency of wastewater treatment plants (WWTPs). The feasibility of the method had been validated based on actual operational data and instance from eight WWTPs located in a city in Northern China. According to the results of the comprehensive evaluation, the operational efficiency of the WWTP using an anaerobic/anoxic/oxic process was generally better than other wastewater treating technologies. And especially, the removal efficiencies of nitrogen and phosphorus pollutants were much higher for the process, which suits well the actual operational situation of Chinese WWTPs. Total nitrogen (TN) removal rate and the productive quantity of the excess sludge cake were identified as important factors in the evaluation of the operational efficiency for a WWTP. So the operation level of WWTP could be improved by increasing the TN removal rate and decreasing the excess sludge cake quantity. The developed method can evaluate and analyze the operational efficiency scientifically and objectively, and the evaluation results can be used to guide the construction, operation and management of WWTPs in The Three Gorge reservoir district of China.
ISSN:1436-3240
1436-3259
DOI:10.1007/s00477-012-0637-2