Study on Wastewater Quality and Its Difference with Upstream and Downstream at Politeknik Mukah Drainage System

Civil Engineering Department, Politeknik Mukah Sarawak, Malaysia

Abstract: Effluents released from wastewater systems do contain pollutants of concern since even advanced treatment systems are unable to remove all pollutants and chemicals. This study was carried out on three different days to determine the wastewater quality of Politeknik Mukah drainage system based on physical and biological parameters. The water quality parameters studied were in-situ parameters of temperature, pH and Dissolve Oxygen (DO); and laboratory analyzed water quality parameters of Total Suspended Solid (TSS), Chemical Oxygen Demand (COD), Ammonic Nitrogen (AN), and Biochemical Oxygen Demand (BOD). The differences in the quality of wastewater at upstream and downstream based on Water Quality Index (WQI) was also carried out. Results showed that wastewater at upstream are affected by pollution rather than intermediate station and downstream station after being compared to WQI. The results indicated the impact of various anthropogenic activities which contribute to high values of BOD, COD, TSS and AN at upstream stations, as compared with the intermediate stations and downstream station. It is suggested that monitoring should be carried out continuously for proper management of this drainage system.