Abstract
Wastewater management is one of the biggest challenges in the world due to increase in population and industrialization. In Faisalabad (FSD), wastewater treatment is being done through Wastewater Stabilization Ponds (WSPs) at Chokera, which is one of the most economical methods of Wastewater Treatment (WWT). Various parameters were examined to check wastewater treatment efficiency of the ponds under diverse climatic conditions. These included Biochemical Oxygen Demand (BOD), pH, Chemical Oxygen Demand (COD), Turbidity, Copper, Total Solids (TS), Total Dissolved Solids (TDS) and Lead. Six locations which were selected for monitoring treatment efficiency, included inlet and outlet of treatment plant, influent of anaerobic ponds, effluent of anaerobic ponds, effluent of facultative ponds, and Pharang drain before and after blending with treated sewage. The testing was performed in two seasons (i.e. Winter 2015 and Summer 2016) in Environmental Engineering Laboratory, Department of Civil Engineering, The University of Lahore, Pakistan. BOD5 removal efficiency of the treatment plant was found 30.08% in winter and 51.74% in summer against designed value of 90% removal. Most of the parameters of the effluent were not meeting the Punjab Environmental Quality Standards (PEQS). The reasons of low efficiency are; variation in climatic conditions (i.e. less solar heat intensity, wind speed and ceased microbial activity in winter), lack of funds by government, increased population, mixing of industrial sewage with domestic sewage and less attention being paid to maintain the performance of Ponds. The study was carried out to assess and compare the efficiency of treatment plant with PEQS in two climatic conditions.
Highlights
Disposal of poorly treated and untreated industrial/domestic wastewater has threatened the quality of surface water bodies in developing countries worldwide
This paper aims at achieving the listed objectives; to monitor the treatment efficiency of Wastewater Treatment Plant (WWTP) in Faisalabad vis-à-vis compliance of Punjab Environmental Quality Standards (PEQS) and to identify the factors affecting the efficiency of the WWTP
WWTP brought down the concentration of winter season it decreased from 990-428 mg/l which various pollutants but this decrease was not are above the required limits
Summary
Disposal of poorly treated and untreated industrial/domestic wastewater has threatened the quality of surface water bodies in developing countries worldwide. Various investigations reports that water pollution has increased in Pakistan. The pollution levels are significantly higher in metropolitan cities due to the presence of number of industries. A report revealed that in 2017 approximately 60% of urban wastewater was produced by 10 major cities of Pakistan from which less than 8% was treated and rest of the water was discharged in Rivers. This water comprising of hazardous metals was later exploited for irrigation purposes due to which all these
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
