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Operating Results of German Sewage Treatment Plants
The Effects of Industrial Wastes on Treatment of Sewage and Sludge
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5-day BOD According acid activated sludge activated sludge process aeration biological processes BOD removal cellulose cent chemical chloride chromium coal compounds concentrations cooling water cyanides dairies detergents digestion tanks dilution discharged into public disposal domestic sewage dry solids effects efficiency effluent Emscher Figure flocculation flow harmful industrial wastes influent iron litres load mg/l mg/litre mixed domestic sewage mixed sewage mixed with domestic municipal plants municipal sewage municipal sewerage systems neutralisation organic percolating filters pH-value phenol pickling plants population equivalents population-equivalents pre-treatment primary sedimentation public sewers pulp quantities re-cycling receiving waters rH rH Ruhrverband sedimentation sedimentation tanks settleable solids sewage and industrial sewage treatment plant sewerage slaughter houses sludge digestion solids content substantially sulphate Table tannery temperature tests textile toxic substances treated treatment of mixed treatment processes volume waste discharge waste water wastes containing