Reduction-of-COD-of-Pulp-and-paper-mill-effluent-using-Sequencing-batch-reactor

1 Abstract --Paper mills generate varieties of pollutants depending upon the type of the pulping process. The wastewaters discharged from these mills have high chemical oxygen demand (COD) and colour, which indicating high concentrations of recalcitrant organics. This study was conducted using a Sequencing Batch Biofilm Reactor of 3.3 L working volume, operated in an aerobic condition and packed with .For the two months, they can be set at 24 hours and later it was adjusted to 12 hours in order to evaluate the performance of the system. The treated wastewater samples for these studies were taken from a recycled pulp and paper mill factory in Moradabad, India with different batch characteristics. The results also indicated that the Biofilm attached can substantially remove these recalcitrant organics in the wastewater, within the range of 10 - 100% COD removal. COD reduction can see easily and the use combination with SBR is one of the best methods for the COD reduction. Thus, COD reduction can observed about 60-80%. Index Terms— Biofilm, Chemical oxygen demand (COD), COD reduction, Effluent, Paper mill effluent, Recalcitrant organics, Sequencing batch reactor. ——————————  ——————————