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Neural-fuzzy control system application for monitoring process response and control of anaerobic hybrid reactor in wastewater treatment and biogas production

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Journal of Environmental Sciences 2010年第12期22卷 1883-1890页

作者： Chaiwat Waewsak Annop Nopharatana Pawinee Chaiprasert Division of Biotechnology School of Bioresources and TechnologyKing Mongkut's University of Technology Thonburi Excellent Center of Waste Utilization and Management Pilot Plant Development and Training InstituteKing Mongkut's University of Technology Thonburi

Based on the developed neural-fuzzy control system for anaerobic hybrid reactor （AHR） in wastewater treatment and biogas production, the neural network with backpropagation algorithm for prediction of the variables pH, alkalinity （Alk） and total volatile acids （TVA） at present day time t was used as input data for the fuzzy logic to calculate the influent feed flow rate that was applied to control and monitor the process response at different operations in the initial, overload influent feeding and the recovery phases. In all three phases, this neural-fuzzy control system showed great potential to control AHR in high stability and performance and quick response. Although in the overloading operation phase II with two fold calculating influent flow rate together with a two fold organic loading rate （OLR）, this control system had rapid response and was sensitive to the intended overload. When the influent feeding rate was followed by the calculation of control system in the initial operation phase I and the recovery operation phase III, it was found that the neural-fuzzy control system application was capable of controlling the AHR in a good manner with the pH close to 7, TVA/Alk 〈 0.4 and COD removal 〉 80% with biogas and methane yields at 0.45 and 0.30 m^3/kg COD removed.

关键词： anaerobic hybrid reactor influent feed flow rate neural-fuzzy control system process response

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