Nutrient removal in an electrically enhanced membrane bioreactor

摘要

Integration of the membrane bioreactor (MBR) into wastewater treatment facilities has gainednpopularity in recent years due to increasingly stringent discharge permits. However, up to nownno research has been conducted on the combination of nitrification, denitrification andnelectrochemical phosphorus removal into a MBR system. In this study a novel electricallynenhanced MBR (EMBR) system was used. Without pH adjustment and external carbon sourcensupplementation, using synthetic feed, ammonium-nitrogen was completely eliminated; COD,ntotal nitrogen and ortho-phosphorus were removed by 94.3%, 77% and 86.6%, respectively.nThe power consumption was 0.22 kW/m3nof the influent synthetic wastewater. With a controlnMBR run in parallel, the applied voltage gradient of 1.82 V/cm did not exhibit adverse influence onnthe microbial growth. This system has the potential to achieve phosphorus removal throughnalternating the direct current intensity. of water samples fornviable C. jejuni.