Rotating Biological Contactors - Second Order Kinetics,
ENVIRONMENTAL PROTECTION AGENCY CINCINNATI OH MUNICIPAL ENVIRONMENTAL RESEARCH LAB
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The RBC process is uniquely adaptable for kinetic studies on secondary treatment of wastewater. Secondary treatment, for this specific kinetic study, is defined as the removal or reduction of soluble substrate with time. The substrate is identified in the reaction phase as soluble chemical oxygen demand sCOD andor soluble biochemical oxygen demand sBOD. The reduction of insoluble oxygen demanding material is not applicable since 1 It is the function of the reactor RBC to convert soluble organic matter into carbon dioxide and insoluble matter for later removal by the secondary clarifier. 2 The use of unfiltered oxygen demand would require the kinetic study to treat the RBC process as a heterogeneous reaction instead of a homogeneous reaction. These results provide added evidence that RBC obey second order kinetics and when the reaction rate constant is known, can be used to predict performance, design optimum train configuration, and can be used to reduce capital costs.