A Modified RBC Design: Performance Evaluation

by Miryoussef Norouzina, Univ Nacional Autonoma de Mexico, Inst de Ingenieria, Mexico City, Mex,
María Alma Deloya-Martínez, Univ Nacional Autonoma de Mexico, Inst de Ingenieria, Mexico City, Mex,
Simón González-Martínez, Univ Nacional Autonoma de Mexico, Inst de Ingenieria, Mexico City, Mex,



Document Type: Proceeding Paper

Part of: Environmental Engineering

Abstract: An RBC (rotating biological contactor) system was designed using Pall rings type 40, and tested under high organic surface conditions. Influent soluble BOD averaged at 55 mg/l, equivalent to an organic surface loading of 7 lb. BOD/day/1000 ft**2 (34 Kg BOD/day/1000 m**2). This is about three times higher than the recommended value of 2. 5 lb. BOD/day/1000 ft**2 (12 Kg BOD/day/1000 m**2). The system showed no clog up or slough off problems during the eight month study period, and more than a year of operation. The effluent BOD ranged from 3 to 10 mg/l, with an average value of 5 mg/l. Nitrification and BOD removal occurred simultaneously in the first stage. Nitrification was practically complete by the end of the third stage. (Author abstract. )

Subject Headings: Rotation | Biological processes | Influents | Solubility | Organic loads | Load factors | Effluents | Wastewater treatment plants

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