RADIBIO. Degradation of recalcitrant chlorinated organics by combination of radiochemical and biochemical oxydation

Abstract

The method have been tested for degrading chlorogranics (AOX) in kraft bleach effluents with a removal efficiency of aproximately 75%. With optimization, a theoretical outline indicates that is should be possible to remove 90% AOX with a capacity of 9-10 cubic meter per hour. Medium doses of electron beams enhanced the biodegradability, whereas large doses impeded the biodegradation. No toxicity was observed after electron beam treatment. The method was also tested for degrading fullchlorinated benzenes from magnesium factory effluent, but with only minor efficiency. The work in the next phase will focus on treatment of AOX in concentrates (sludge and embrane filtrate) from kraft bleach effluents.