Journal of Earth & Environmental Waste Management
ISSN: 3065-8799 | DOI: 10.64030/3065-8799
Abdullah Al Mahmud and Niger Sultana
To ensure compliance with the requisite standards for treated wastewater, it is imperative that the effluent treatment plant functions optimally. The present investigation employs the Wastewater Quality Index (WWQI) and multivariate statistical analysis as tools for the purpose of monitoring wastewater quality. Wastewater samples were collected from the inlet and outlet locations of an Effluent Treatment Plant (ETP) situated in the Narayanganj district of Bangladesh. The ETP has a daily capacity of approximately 5000 cubic meters. The research, spanning a duration of twelve months, was carried out during the months of January and December in the year 2022. The physicochemical characteristics of both the influent and effluent were analyzed to assess the quantity of biodegradable and non-biodegradable pollutants that were present within the wastewater. The ETP treatment process comprises two distinct treatment units. The first unit includes an equalization unit, chemical treatment, and primary sedimentation. The second unit comprises the MBBR (Moving Bed Biofilm Bioreactor) system, the ASP (Activated Sludge Process) system, and the biological sedimentation system. The physicochemical properties of the wastewater samples are evaluated through the examination of various parameters, such as pH, Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), and Total Suspended Solids (TSS). The biochemical oxygen demand (BOD) was calculated to have a maximum monthly value of 96.59% and an average annual value of 95.70%. The efficacy of chemical oxygen demand elimination was determined to be 92.24%, with an average annual rate of 91.86%. The effluent sample was found to be within the acceptable range for pH and DO measurements. Additionally, the TSS exhibited an annual average of 96.85% and a maximum monthly average of 98.06%. WWQI utilized the ECR 2023 to scrutinize all available data pertaining to the quality of wastewater. existed numerous divergent forms of influent wastewater discharge, characterized by a markedly substandard quality. The Water Quality Index (WWQI) of the effluent samples was assessed to be of outstanding quality. A Pearson correlation analysis was conducted to examine the correlation among the measures of wastewater quality. The ultimate discharge exhibited superior characteristics suitable for release into the surrounding aquatic environment and demonstrated a greater efficacy in terms of pollutant elimination compared to ECR 2023. The effluent treatment plant (ETP) utilized in the pulp and paper industry is effectively managed and has the potential to be repurposed for treating other types of industrial effluent.