Author(s): T. Jwara
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Abstract: Traditionally, the complexity associated with implementing and controlling biological nutrient removal (BNR) in wastewater works (WWW) has been primarily in terms of balancing competing requirements for nitrogen and phosphorus removal, particularly with respect to the use of influent chemical oxygen demand (COD) as a carbon source for the microorganisms (Jwara, 2021; Jwara et al., 2019). Successful BNR optimization and modelling using WEST (Worldwide Engine for Simulation and Training) depend largely on the accurate fractionation of the influent COD. The different COD fractions have differing effects on the BNR process. Therefore, the influent characteristics need to be well understood, especially in the age of contaminants of emerging concern in order to build robust wastewater treatment systems. This study presents the fractionation results of primary wastewater effluent COD at one of South Africa’s wastewater works treating 65ML/day of mixed industrial and domestic effluent. COD can be characterized into four fractions i. e. readily biodegradable COD (Ss), slowly biodegradable COD (Xs), soluble inert COD (SI), and particulate inert COD (XI).
Year: 2022