An integral control strategy for activated sludge plants presented in this paper consists of three low-level control tasks. The first is the actual respiration rate control by manipulating the influent flow rate, whereby the aerators are at a fixed position for each setpoint. The second task is the maximum respiration rate control by manipulating the waste activated sludge flow rate. The third task of the integral control strategy is the instantaneous respiration rate monitoring, which informs the operator about the performance of the process.
Control of Activated Sludge Plants Based on Measurement of Respiration Rates
Abraham Klapwijk, Henri Spanjers, Hardy Temmink; Control of Activated Sludge Plants Based on Measurement of Respiration Rates. Water Sci Technol 1 December 1993; 28 (11-12): 369–376. doi: https://doi.org/10.2166/wst.1993.0677
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