David Embley--A single stage, Moving Bed Bio-reactor (MBB) pilot system was evaluated on ECF bleached kraft effluent at Irving Pulp & Paper Ltd. for its feasibility in the reduction of COD and BOD5 at both mesophillic and thermophillic operating conditions. Trials were performed over a ten month time frame varying the temperature, pH and retention time in the reactor to determine the optimum process conditions.
The moving bed bio-reactor has proved to be effective in removing COD and BOD5 from the bleached effluent stream at both 38 C (100 F) and 57-65 C (135-50 F) provided there is sufficient retention time. The operation of the pilot plant, the reactor conditions and the resulting changes in the bleached kraft effluent parameters are discussed in this paper.
Product code: ENV0168Author: Embley, D.
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