Treatment of Evaporator COndensate Using a High Temperature Membrane Bioreactor: Determination of Maximum Operating Temperature and System Costs

摘要

The feasibility of biologically treating the foul fraction of the evaporator condensates from a kraft pulp mill for reuse as process water, using a high temperature membrane bioreactor, was investigated. Treatment is required because of the high concentratioin of odorous ocmpounds contained in the foul fraction of the evaportor condensate. Also, increasingly stringent legislaton, such as the cluster Rule, prohibits the evaportator condensate. Also, increasingly stringent legislation, such as the cluster rule, prohibits the resue of the foul fraction of the evaporator condensates without treatment because of the high concentration of hazardous air pollutants the condensate contains. The HAP can volatilize to the atmosphere causing hazardous working conditions. Methanol is the main contaminant of concern. A atmoshpere causing hazardous working conditions. Methanol is the main contaminant of concern. A high temeprature MBR was selected for the treatment of evaporator condensate for reuse since it is potentially more eficient and less expensive than steam stripping and conventional biological treatment.