Stephen P. Makris, Sujit Banerjee--Profiles of resin and fatty acids (RFAs) and COD were measured across the secondary treatment systems of three pulp mills. The RFAs are associated with suspended solids, principally fiber, and are partially removed through settling. Activated sludge systems are more efficient in removing RFAs than are ASBs because of their higher solids level. Dehydroabietic acid accounts for a significant fraction of the effluent toxicity in the two ASBs studied. The microorganisms in an ASB are unable to respond rapidly to an RFA spill, and effluent toxicity can be elevated for prolonged periods because of hydraulic mixing.
Product code: ENV01120Author: Makris, S.P., Banerjee, S.
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