Optimal aeration control in a nitrifying activated sludge process

Water Research
L Amand, Bengt Carlsson

Abstract

An important tool to minimise energy consumption in activated sludge processes is to control the aeration system. Aeration is a costly process and the dissolved oxygen level will determine the efficiency of the operation as well as the treatment results. What aeration control should achieve is closely linked to how the effluent criteria are defined. This paper explores how the aeration process should be controlled to meet the effluent discharge limits in an energy efficient manner in countries where the effluent nitrogen criterion is defined as average values over long time frames, such as months or years. Simulations have been performed using a simplified Benchmark Simulation Model No. 1 to investigate the effect of different levels of suppressing the variations of the effluent ammonium concentration. Optimisation is performed where the manipulated variable for aeration (the oxygen transfer coefficient, K(L)a) is minimised with the constraint that the average daily flow-proportional ammonium concentration in the effluent should reach a desired level. The optimisation results are compared with constant dissolved oxygen concentrations and supervisory ammonium control with different controller settings. The results demonstrate an...Continue Reading

References

May 26, 2006·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Darko VreckoSebastjan Podbevsek
May 26, 2006·Water Science and Technology : a Journal of the International Association on Water Pollution Research·E AyesaJ Suescun
May 26, 2006·Water Science and Technology : a Journal of the International Association on Water Pollution Research·O YamanakaK Yamamoto
Oct 10, 2009·Water Research·Vinicius Cunha MachadoJuan Antonio Baeza
Apr 27, 2010·Water Science and Technology : a Journal of the International Association on Water Pollution Research·A ThorntonM Haeck

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Citations

Nov 30, 2015·Water Research·Anna M Karpinska, John Bridgeman
Jul 15, 2015·Water Research·Christine SweetappleDavid Butler
Apr 21, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Nasir EmamiDiego Rosso
Feb 14, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Ewa ZaborowskaJacek Makinia
Feb 7, 2018·Water Research·Veena BobadeNicky Eshtiaghi

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