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Metropolitan and Southern Branch Engineering
North Eastern Branch
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acid activated sludge activated sludge plant aeration aeration tanks average B.Sc biological Bolton capacity chemical chlorine Coleshill concentration containing cost crude detention period digested sludge digestion tanks discharge dissolved oxygen Drainage dry weather drying beds effect engine experiments filtration final effluent flocculation flow foam gallons gas liquor grit heat humus tanks increase industrial installed Lissapol load Lumb Mersey River method methylene blue Minworth nitrate nitrifying nitrogen obtained operation oxidation paper percolating filters phenols pipe possible present primary produced pump raw sludge recirculation removed River Board River Bollin samples Santomerse secondary sedimentation tanks settled sewage settling tanks sewage effluent sewage purification sewage treatment sewers sludge digestion standards Stoke-on-Trent storm water stream sulphate sulphonate surface suspended solids synthetic detergents tank effluent temperature tion trade effluents trade wastes treated unit vote of thanks yd./day