Contributions, Volumen4Massachusetts Institute of Technology., 1908 Reprinted papers, which have appeared in various scientific and technical journals. |
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Términos y frases comunes
acid acre per day ammonia amount analysis available chlorine average bacteria bleaching powder Boston sewage calcium cent centre chemical Columbus Columbus nozzle cone corrected coefficients cost crude coefficients crude sewage cubic centimeter cubic feet curve decolorization determined disinfection distribution efficiency excessive discharge filtration flow Free ammonia gallons per acre gallons per minute gravity distributor head-on-sprinkler increase lime liquid magnesium Massachusetts material measuring tank method methylene blue million gallons Nessler nitrates nozzle obtained operation organic matter organic nitrogen orifice oxygen consumed period Phelps pollution pounds precipitation putrefactive putrescible radius radius of curvature rate of discharge removal Salford samples sedimentation tanks septic effluent septic tank sewage disposal Sewage Experiment Station showed sludge solution splashing disk sprinkler stable sterilization stream surface suspended matter suspended solids Table temperature tion total discharge total head treatment trickling beds trickling effluent trickling filter trough tube turbidity wash water wetted area Winslow
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Página 397 - The nozzle, which is of brass, consists of a single orifice, ^ inch in diameter, with rounded edges, above which, held by two thin arms, is an inverted 90° cone, the axis of the cone coinciding with the axis of the orifice. The jet, on leaving the orifice, impinges against the cone and is transformed into a thin sheet, spreading out radially and breaking into a shower of fine drops.
Página 380 - ... for the disinfection, purification and utilization of sewage by the scientific cultivation of yeast-like organisms." In 1870 the subject was approached along a different line by the English experts of the Rivers Pollution Commission under the leadership of Frankland. These experimenters failed to grasp the biological character of the process, but they understood its chemistry and showed that sewage could be successfully purified by filtration through various soils, at much higher rates than those...
Página 379 - ... sulphide and the amines. Or, secondly, under the influence of oxygen, it may undergo another process that we call nitrification, a slow burning or combustion which converts the organic matter into nitrates, or other mineral substances, without the production of foul odors and in a wholly innocuous way. Organic matter must either putrefy or nitrify, and the aim of sewage treatment is to nitrify it. This involves the supply to the organic matter of one to three times its weight of oxygen, with...