Ranking Sewage Treatment Plants with the Application of Fuzzy Composite Programming

The present study rank six sewage treatment plants receiving sewage from the different zones of city. Were the wastewater was analyzed for solids, organic and inorganic parameters. The removal is observed in solids and organic parameters, while there is increase in inorganic parameters. The efficiency is evaluated considering overall effect of eight parameters and weights are assigned as per the importance of each parameter in treatment process. The Multi Parameter aggregated Index (MPAI) is developed by Fuzzy approach. Karanj STP is ranked first with 58.30% efficiency while Bamroli STP is ranked last with very poor efficiency. Considerable uncertainties are involved in the process of defining the treated wastewater quality for specific usage.