Modeling of rotating biological contactor systems
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Updated: Feb 15, 2026

The Use of Chemostats in Microbial Systems Biology
Published on: October 14, 2013
Yeun C Wu1, Ed D Smith2, Yung T Hung3
1Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261.
Abstract:
An investigation of the rotating biological contractor (RBC) process variables to determine the efficiency of biological oxygen demand (BOD) removal is presented. Operating parameters including influent BOD content (<355 mg/liter), flow rate, disk surface area, hydraulic loading, disk rotational speed, liquid retention time, stage number, and wastewater temperature were evaluated. The BOD predictive model was developed using literature data with multiple regression analysis. This study shows that influent BOD concentration, hydraulic loading, stage number, and wastewater temperature are the most significant variables in predicting the RBC system performance. The model presently developed was verified by field data concerned with the treatment of both domestic and low-strength industrial wastewaters. Also, the results calculated by this model were compared to those obtained from Weng's model.
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