Performance of an anaerobic baffled reactor (ABR) for the pretreatment of dyeing industry wastewater

摘要

An anaerobic baffled reactor (ABR) for the pretreatment of dyeing industry wastewater was investigated. The influence of different hydraulic retention times (HRTs) on the profiles of chemical oxygen demand (COD), biochemical oxygen demanded (BOD), color, oxidation reduction potential (ORP) and volatile fatty acid (VFA) was examined. Results showed that the ABR can effectively remove COD and color from the raw wastewater, and the BOD/COD ratio can increase to more than 0.3. The reactor's efficiency in removing VFA decreased as the HRT decreased and ORP remained less than -165 mV. This indicates that the ABR process is suitable for pretreating the dyeing industry wastewater, forming good conditions for subsequent aerobic biodegradation.