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Effect of Hydraulic Loading Rates in the Performance of Rotating Biological Contactors for Treating Grey Water


Affiliations
1 Department of Civil Engg., Annamalai University, Annamalainager, Tamil Nadu, India
2 Centre for Environment, Health and Safety, Annamalai University, Annamalainager, Tamil Nadu, India
 

The laboratory model of two-stage Rotating Biological Contactor (RBC) which was used in the present study is a modified one, with a provision to vary the speed of rotating blades. Grey wastewater was used to study the performance of the modified rotating biological contactor. The reactor had four rotating blades in each stage, having the size of 300mm × 100mm × 10mm, attached perpendicular to the shaft. The experiment was conducted for different influent COD loads and different speeds of rotating blades. Among the different speeds of rotational blades in treating grey water, the rotational speed of 3 rpm was found to yield better percent removal of COD at 95.85% as maximum, whereas against the rotational speeds of 4.5 and 6 rpm, the treatment efficiency is 92.15% and 90.90% respectively.

Keywords

Rotating Biological Contactor (RBC), Grey Water, COD Removal.
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  • Effect of Hydraulic Loading Rates in the Performance of Rotating Biological Contactors for Treating Grey Water

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Authors

S. Syed Enayathali
Department of Civil Engg., Annamalai University, Annamalainager, Tamil Nadu, India
V. Nehru Kumar
Centre for Environment, Health and Safety, Annamalai University, Annamalainager, Tamil Nadu, India

Abstract


The laboratory model of two-stage Rotating Biological Contactor (RBC) which was used in the present study is a modified one, with a provision to vary the speed of rotating blades. Grey wastewater was used to study the performance of the modified rotating biological contactor. The reactor had four rotating blades in each stage, having the size of 300mm × 100mm × 10mm, attached perpendicular to the shaft. The experiment was conducted for different influent COD loads and different speeds of rotating blades. Among the different speeds of rotational blades in treating grey water, the rotational speed of 3 rpm was found to yield better percent removal of COD at 95.85% as maximum, whereas against the rotational speeds of 4.5 and 6 rpm, the treatment efficiency is 92.15% and 90.90% respectively.

Keywords


Rotating Biological Contactor (RBC), Grey Water, COD Removal.