Patent DE-102008019782-A1 (DE)
Title: Cleaning of wastewater in aeration basin, comprises occasionally introducing oxygen by a feeding device, and detecting a process actual value of the wastewater in the basin by a measuring device and then guiding to data-processing system
Inventor: BAYERLEIN FRIEDRICH KARL
IPC: C02F3/12
Filed: 2008-04-18
Abstract: The method comprises occasionally introducing oxygen over a feeding device (7), whose capacity is controllable over an energy desired value, and detecting a process actual value of the wastewater in an aeration basin (2) by a first measuring device (6) and then guiding to data-processing system, in which the energy desired value is determined from the process actual value. The energy desired value is conveyed to a plant controller (10) for controlling and/or regulating the feeding device. An energy actual value of the feeding device is detected by a second measuring device (8). The method comprises occasionally introducing oxygen over a feeding device (7), whose capacity is controllable over an energy desired value, and detecting a process actual value of the wastewater in an aeration basin (2) by a first measuring device (6) and then guiding to data-processing system, in which the energy desired value is determined from the process actual value. The energy desired value is conveyed to a plant controller (10) for controlling and/or regulating the feeding device. An energy actual value of the feeding device is detected by a second measuring device (8) and is considered for the determination and minimization of the energy desired value. The energy desired value in the data-processing system is minimized under the consideration of process limit values and is determined and minimized under the additional consideration of energy limit values. The process actual value and/or the energy actual value are guided to an energy balance controller, in which a process desired value is determined under the consideration of process limit values and/or energy limit values, where if necessary the process desired value is guided together with the process actual value to a process controller, which determines the energy desired value and transfers to the plant controller. The process desired value is determined, so that the energy desired value is minimized. The energy balance controller of the plant controller delivers time-dependant functions for the energy-optimized control of the feeding device. The process limit values are given for several cleaning performances of the wastewater in the aeration basin and are assigned to the cleaning performance in each case. Additional energy desired values in the data-processing system are determined and minimized for controlling the capacity of inlet- and/or outlet devices assigned to the aeration basin. The dosage of processing aids and/or additives is controlled over the data-processing system and/or the plant controller for minimizing the total energy requirements of the process. The determination of the energy desired value takes place with distinct and/or indistinct methods and with a self-learning system. An independent claim is included for a plant for cleaning of wastewater.