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Effect of Hydraulic Loading Rates in the Performance of Rotating Biological Contactors for Treating Sugar and Dairy Effluents


Affiliations
1 Department of Civil Engineering, Annamalai University, Annamalai Nagar-608 002, T.N., India
 

A laboratory model of rotating biological contactor 10.125 litres of effective volume with three stages and a clarifier arrangement in the last stage was used. Synthetic effluent streams of sugar and dairy were used for treatability evaluation, in terms of COD removal under varying influent flow rate, influent COD and rotational speeds of the discs. The COD removal was found to vary from 72.93% to 91.66% under varying hydraulic loading rates of 0.039 to 0.133 m3/m2/day in the case of sugar effluent for the disc rotational speed of 6 rpm, and 67.95 to 87.57% under similar conditions for dairy effluent.
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  • Effect of Hydraulic Loading Rates in the Performance of Rotating Biological Contactors for Treating Sugar and Dairy Effluents

Abstract Views: 99  |  PDF Views: 1

Authors

D. Selvakumar
Department of Civil Engineering, Annamalai University, Annamalai Nagar-608 002, T.N., India
V. Nehru Kumar
Department of Civil Engineering, Annamalai University, Annamalai Nagar-608 002, T.N., India

Abstract


A laboratory model of rotating biological contactor 10.125 litres of effective volume with three stages and a clarifier arrangement in the last stage was used. Synthetic effluent streams of sugar and dairy were used for treatability evaluation, in terms of COD removal under varying influent flow rate, influent COD and rotational speeds of the discs. The COD removal was found to vary from 72.93% to 91.66% under varying hydraulic loading rates of 0.039 to 0.133 m3/m2/day in the case of sugar effluent for the disc rotational speed of 6 rpm, and 67.95 to 87.57% under similar conditions for dairy effluent.