Three large wastewater treatment plants in Sweden participate in a project evaluating different types of ammonium feedback controllers in full-scale operation. The goal is to improve process monitoring, maintain effluent water quality and save energy. The paper presents the outcome of the long-term evaluation of controllers. Based on the experiences gained from the full-scale implementations, a discussion is provided about energy assessment for the purpose of comparing control strategies. The most important conclusions are the importance of long-term experiments and the difficulty of comparing energy consumption based on air flow rate measurements.
Lessons learnt from evaluating full-scale ammonium feedback control in three large wastewater treatment plants
L. Åmand, C. Laurell, K. Stark-Fujii, A. Thunberg, B. Carlsson; Lessons learnt from evaluating full-scale ammonium feedback control in three large wastewater treatment plants. Water Sci Technol 1 April 2014; 69 (7): 1573–1580. doi: https://doi.org/10.2166/wst.2014.061
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