Performance and Real-time Control of a Novel SBR Based on Simulating Photovoltaic Aeration for Organics Removal

Abstract

A novel SBR based on simulating photovoltaic aeration for organics removal was established for rural sewage treatment. Short-term effects of aeration rate and temperature on soluble chemical oxygen demand (SCOD), ammonium (NH4 + -N) and dissolved total phosphorous (DTP) removal processes were investigated, and suitable real-time control parameters for organics removal process were selected. The results showed that organic removal process can be divided into the rapid degradation stage and the recalcitrant degradation stage. In the organic matter rapid degradation stage, when temperature was constant (25°C), the increase in aeration rate resulted in a positive impact upon the SCOD decrease rate and the amount of NH4 + -N assimilated by heterotrophic bacteria. The slope changes in DO profiles (dDO/dt) were found to better represent the organic degradation process, which could be used for real-time control of the organics removal process after smoothing.