Performance Evaluation of Lal-Pani Sewage Treatment Plants STP Shimla

Abstract

The present study has been undertaken to evaluate the performance of 19.35 MLD Sewage Treatment Plant (STP) located at Lalpani, Shimla. Performance of this plant is an essential parameter to be monitored as the treated effluent is discharged into River Kalapani. The Performance Evaluation will also help for the better understanding of design and operating difficulties (aeration, blowers, etc.) in Sewage Treatment Plant. Sewage samples were collected from different treatment units i.e. Inlet screen, outlet Grit Chamber ,outlet Clarifier etc and analysed for the major waste-water quality parameters, such as pH, Biological Oxygen Demand (BOD), Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS). Actual efficiency of the 19.35 MLD STP will be evaluated by collecting samples from different treatment units for the period of 8 months (October to May). The conclusions of these evaluations may determine required recommendations and focus on modification requirements for the STP and will also determine whether the effluent discharged into the water body are under limits. The conclusions drawn from this study will outline the need for continuous monitoring and performance analysis by removal efficiencies of each and every unit of STP.