Sewage disposal . ead,England, maintained that from a bacteriological standpoint thepurification of sewage took place in two stages, and that thefirst or anaerobic stage should serve as a prelude to further CAMERONS SEPTIC TANK 141 treatment. In 1891 he built at Ashtead a small plant whichconsisted of a closed tank filled with stones, for the partial lique-faction of the solid matter in the sewage, and of open trayscontaining coke, for the second stage, where nitrification was totake place. In 1893 a plant on the same plan was designed by Scott-Moncrieff for the borough of Towchester. A year l
Sewage disposal . ead,England, maintained that from a bacteriological standpoint thepurification of sewage took place in two stages, and that thefirst or anaerobic stage should serve as a prelude to further CAMERONS SEPTIC TANK 141 treatment. In 1891 he built at Ashtead a small plant whichconsisted of a closed tank filled with stones, for the partial lique-faction of the solid matter in the sewage, and of open trayscontaining coke, for the second stage, where nitrification was totake place. In 1893 a plant on the same plan was designed by Scott-Moncrieff for the borough of Towchester. A year later, in1894, Prof. A. N. Talbot built a sewage tank at Urbana, 111., inwhich the liquefying anaerobic action was observed; and a largerplant, with this definite end in view, was designed for Cham-paign, 111., in 1895 and built in 1897. Camerons Septic Tank. In spite of the pioneer efforts ofthese earlier workers the anaerobic process of sewage puri-fication owes its practical development chiefly to Donald Cameron. Fig. 40. Camerons Septic Tank. of Exeter, England, who holds much the same relation to thisprocess that the Massachusetts State Board of Health holdstoward intermittent filtration. In 1895 he installed a water-tight covered basin for the treatment of the sewage of a portionof the city by anaerobic putrefaction and gave it the picturesquename of the septic tank, by which it has since been tank at Exeter (Fig. 40) was an underground tank of cementconcrete, 65 feet long, 19 feet wide, and of an average depth of7 feet, and having a capacity of 53,000 gallons. The tank wascovered with a concrete arch, and a portion near the inlets wasmade about 3 feet deeper than the rest and partially cut off by alow wall, forming a couple of pockets or grit chambers, to retainsand, grit, and road washings. The inlet was carried down to adepth of 5 feet below the surface, so that air could not makeits way down with the sewage, and also so that gases could notescape from the tan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1919
