Abstract
Abstract The non-linear feedforward control theory is employed in the present work for determining the artificial aeration control policies of a thermally and/or organically polluted stream. A dispersion water quality model is used for describing the stream temperature, biochemical oxygen demand, and dissolved oxygen distributions along the stream. The artificial aeration control policy is determined such that the dissolved oxygen concentration can bo maintained at its original steady state level in the presence of thermal and/or organic waste discharges. Both step and pulse thermal and organic waste disturbances are considered. Effects of different amounts of thermal and organic waste discharges and the Peclet number on the artificial aeration rate are investigated.
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