Experimental Assessment and Modeling of Storage Kinetics for Primary Sludge Under Anoxic Conditions

Abstract

Nitrate utilization was used as the basis for experimental assessment of storage kinetics under anoxic conditions. Acetate and the filtered portion of primary sludge were selected as substrates. Experimental data were evaluated in accordance with ASM3. Results obtained did not confirm previously suggested values for kinetic coefficients. Acetate storage could be characterized by k_STO and Y_STOD values of 10 g COD (g COD ⋅ day)^-1 and 0.6 g COD (g COD)^-1, respectively. Higher values were computed for primary sludge. Results suggest reevaluation of the concept of readily biodegradable substrate as defined in ASM3 and tested in the study.