Control of sludge recycle flow in wastewater treatment plants using fuzzy logic controller

Abstract

Sludge recycling system is an important part of wastewater treatment plants, because the lack of control model, almost all of the sludge return system with wastewater treatment plants is simply the ratio by the amount of water to set the sludge return rate. In order to ensure the water quality with a high ratio, resulting in high energy consumption, handling capacity decreased. This paper presents the application of a fuzzy logic controller to sludge recycle flow processes to predict the amount of return sludge, adjustment return sludge dynamic real-time, saving energy costs. The Simulation results have shown the robustness of the implementation and the efficiency of the proposed control strategies, which have been operated automatically in a safe, stable and optimum operating point, improving effluent quality and reducing energy costs. © 2013 Springer-Verlag.