Performance evaluation of 1 MLD MBBR type sewage treatment plant

Sewage treatment system considered to be an inevitable step to handle the burgeoning water scarcity in the recent years. In this study a 1 MLD (Million Litres per Day) sewage treatment plant was selected and evaluated its performance efficiency for a period of 8 Weeks (02.10.2021 to 20.11.2021). The adapted treatment technology was Moving bed Bioreactor (MBBR) which is an attached biological growth method. This technology totally driven by MBBR Carrier media, which provides an enormous surface area for the microbial attachment. The treatment system has the following units such as Bar screen chamber, Grit Chamber, Oil & Grease Chamber, Equalization Tank, Anoxic Tank, MBBR Tank, Settling Tank, Filter Feed Tank, Pressure Sand Filter (PSF), Activated Carbon Filter (ACF), Chlorine dosing and Treated Water Tank. Water samples were collected from different treatment units for 10 days and analysed for the major water quality parameters such as Biochemical oxygen demand (BOD), Chemical oxygen demand (COD), Total Kjeldhals Nitrogen (TKN) and Total suspended solids (TSS). The analysis showed that all treated water parameters meet the State Pollution board standards. Also the results were very much useful to prepare a Standard Operating Procedure (SOP) which helps in hindrance free Operation and Maintenance of the system.