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REPORT OF THE STEERING COMMITTEE
REPORT OF THE DIRECTOR OF WATER POLLUTION RESEARCH
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acetate Acinetobacter activated sludge activated-sludge plants activated-sludge process aeration algae ammonia anaerobic digestion average bacteria biodegradability biological cadmium calculated Celite cell CEng cent chloroform ciliates coliform count Comamonas concentration copper culture detergent determined digestion dilution discharge dissolved oxygen distribution domestic sewage effect effluent estuary examined filtration FInstWPC fish flocculation flow glucose high-rate increase investigation Liverpool Bay measurements medium method mg/l mixed liquor nitrification nitrogen observed obtained operation organic carbon outfall percolating filter period pH value phenol phosphorus Pollution Research Laboratory predicted primary filter proportion protozoa rainbow trout removal Report for 1969 River Trent rivers samples settled effluent settled sewage sewage effluent sewage sludge shown simulation solids content soluble specific surface area substrate sulphide suspended solids Table tank temperature tests tidal toxicity treatment of sewage Trent velocity waste waters Water Pollution Research wet air oxidation zinc