Fuzzy-Mamdani environmental quality assessment of gas refinery chemical wastewater in the Pars special economic and energy zone

Abstract

Abstract This study accomplishes fuzzy wastewater environmental quality assessment in South Pars Complex. Indeed, the proposed Fuzzy Wastewater Quality Index FWWQI comprises four pollutants: COD, BOD, TSS, and pH. Limits of fuzzy quality levels in membership functions are prepared by literature advice, environmental standards, and environmental expertise judgments. The research results express those dominant pollutants in Fuzzy Environmental Quality Index FWWQI are known as COD and BOD. FWWQIs of refinery#A of the South Pars Gas Complex in 2013 and 2014 equal 48.8 (Good) and 44 (Good), respectively. This matter represents perfect standardization of refinery#A in wastewater pollution control, which improves environmental quality and risk indices with a fair time pattern. For the computerized interface of FWQI assessment, created in this research, a Matlab code using Microsoft Office Excel Sheet for Input/output data of the Inference System. This benefit is an important achievement of management systems: ISO 14001 and Health, Safety and, Environment Management System.