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Kolkata is located on the western bank of the Hooghly River. Wastewater from the city is discharged into this river and pollutes the river water. It causes maximum negative effects than positive impacts. Many uncertainties and bipolarity occur for this reason. Through the bipolar fuzzy concept, we can easily determine this situation.
A bipolar fuzzy is an effective tool for illustrating uncertainty and fuzziness for a decision-making problem. Therefore, in this paper, we have invented the bipolar expected value of bipolar fuzzy numbers. In addition, we have invented a few formulae and a theorem based on bipolar expected values.
Using this bipolar expected value, we developed a novel MCDM technique, which is employed for wastewater management problems in Kolkata under a bipolar environment. Numerically, we have solved the wastewater management problem in a bipolar fuzzy environment.
A useful ranking method for TBpF numbers has been invented. We designed a novel MCDM method based on bipolar expected value under a bipolar fuzzy environment. This MCDM technique analysed a wastewater management problem in Kolkata under a bipolar fuzzy environment.