Abstract
Recirculation of the reject water (RW) from sludge treatment units can cause significant load fluctuations in the biological nutrient removal activated sludge (BNRAS) systems at wastewater treatment plants (WWTP). Because the characteristics of these influent sources are highly variable, optimizing the operation of a WWTP under high-load conditions is a challenging task. This study describes an application of model-based scenario analysis to investigate the impact of various operating conditions on the performance of a BNRAS at the largest Italian WWTP. The process model was developed and calibrated based on the sampling and measuring campaigns. Before real-scale implementation of the side-stream DEMON® Anammox treatment technology, a feasibility analysis was carried out by developing fictional scenarios. Results show that the reduction of nitrogen load by the side-stream implementation of the DEMON® process could provide an opportunity to optimize the performance of BNRAS based on Solid Retention Time (SRT). By integrating the side-stream treatment of RW with SRT optimization in the BNRAS units, energy consumption can be reduced by up to 20%, and the effluent quality can be improved.
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Borzooei, S., Zhu, JJ., Scibilia, G., Zanetti, M.C. (2022). Efficient Operation of a WWTP Under High-Load Conditions: A Model-Based Feasibility Analysis for Implementing the Side-Stream Deammonification. In: Naddeo, V., Choo, KH., Ksibi, M. (eds) Water-Energy-Nexus in the Ecological Transition. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-031-00808-5_102
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