Technical Bulletin No. 0060: Determination of the Possible Application of a Modified Activated Sludge Process to the Treatment of Concentrated Board Mill Effluents I. Laboratory Te

Effluents from clarification systems of mills producing news and chip boards, roofing felts, shoe boards and similar products which practice a high degree of recirculation, are frequently low in volume, low in settleable or suspended matter but high in oxygen demand. The preliminary laboratory tests reported herein were directed toward determining if such waste water could be oxidized biologically under ideal conditions, what rates could be obtained and the seeding requirements in terms of return sludge. Results obtained were encouraging since they indicated that high degrees of oxidation could be obtained in the respirometer under ideal conditions. If further laboratory tests corroborate these finding development studies will be justified. How this might be accomplished, together with a projection of the possible equipment requirements, is presented in a paper prepared by Dr. H.W. Gehm, the Council's Technical Advisor, which is included with the report. It is anticipated that laboratory pilot plant studies on two or more types of waste will be undertaken within the next year. The preliminary studies were made at Rutgers University under the direction of Dr. Herman Amberg, who is now on the Council's staff.