International Science Community Association International Research Journal of Environmental Sciences 2319-1414 10 1 2021 01 22 Effect of percentage fill media on performance of moving bed biofilm reactor for dairy wastewater treatment 23 27 EN Tripti Kumari 1 Laboratory of Environment and Biotechnology, Department of Botany, Patna Science College, Patna University, Patna 800005, India . Shardendu 2 Laboratory of Environment and Biotechnology, Department of Botany, Patna Science College, Patna University, Patna 800005, India Aguilar Mark Gabriel Wagan 1 ABE International Business College-Quezon City, Philippines Acharya Bishwa B. 1 Department of Mechanical Engineering, IOE Pulchowk Campus, TU, Nepal Shrestha Yugal K. 2 Department of Mechanical Engineering, IOE Pulchowk Campus, TU, Nepal Dhakal Sandeep 3 Department of Mechanical Engineering, IOE Pulchowk Campus, TU, Nepal Joshi Usha 4 Department of Physics, Patan Multiple Campus, TU, Nepal Poudyal Khem N. 5 Department of Applied Sciences and Chemical Engineering, IOE Pulchowk Campus, TU, Nepal Topale Sanket 1 Department of Environmental Engineering, K.I.T.s College of Engineering (Autonomous), Kolhapur, India Ingavale Bharat 2 Department of Environmental Engineering, K.I.T.s College of Engineering (Autonomous), Kolhapur, India > Research Paper 2020 6 10 2021 01 22 Dairy industries are among the most polluting food industries as it requires large amount of fresh water and generate large amount of wastewater that may contrary affect the environment, if it is discharged untreated. The current paper assesses the performance of Moving Bed Biofilm Reactor (MBBR) process for primary treated dairy wastewater. MBBR is an attached growth biological treatment process technique, where suspended plastic media is used as biofilm carriers. The experimental investigation includes the characterization of dairy wastewater for parameters pH, COD, BOD, TDS and TSS. It also includes an optimization of percentage fill of biofilm carrier media from 60% to 30% in MBBR process for dairy wastewater treatment to achieve the disposal standards. It was investigated that the reduction in percentage fill of carrier media resulted out in decrease in microbial content of reactor thereby decreasing the removal efficiencies with decreased percentage fill of carrier media. 50% fill of biofilm carrier media was observed to be optimum percentage fill for achieving disposal standards. The average removal efficiencies observed at HRT of 44 hours for 50% carrier fill for the parameters COD, BOD, TDS and TSS are 92.64%, 98.69%, 17.18% and 85.77% respectively. Copyright@ International Science Community Association