Start-Up Phase And Stability Of Expanded Granular Sludge Bed Reactor To Treat Slaughterhouse Wastewater

IJEP 41(9): 1066-1070 : Vol. 41 Issue. 9 (September 2021)

Vijaybabu Sundaramurthy1, Asha Balasubramanian1* and Partheeban Pachaivannan2

1. Annamalai University, Department of Civil Engineering, Annamalai Nagar – 608 002, Chidambaram, Tamil Nadu, India
2. Chennai Institute of Technology, Chennai – 600 069, Tamil Nadu, India


A laboratory-scale anaerobic expanded granular sludge bed reactor (EGSBR) was designed and fabricated to treat slaughterhouse wastewater. The reactor was continuously run at an organic loading rate of 0.013 and 0.014 kgCOD/m3/day, below the mesophilic level. The result showed that the extended granular sludge bed reactor was stable. The period was determined to be between the 54th day and the 61st day and these days showed maximum removal efficiency. The volatile fatty acids started to accumulate during the start-up era, from the 18th day to the 27th day. The pH level also declined during these stages. The stabilization phase was started at the end of the 52nd day onwards with the help of bacterial consortium. An initial organic loading rate proved useful for the propagation of anaerobic active sludge and reduced organic chemical oxygen demand loading resulted in lower gas production and higher wastewater upflow velocity.


Chemical oxygen demand, Expanded granular sludge bed reactor, Mesophilic, Organic loading rate, Slaugh-terhouse wastewater, Volatile fatty acid


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