Identifier: factoryindustria15newy (find matches)
Title: Factory and industrial management
Year: 1891 (1890s)
Authors:
Subjects: Engineering Factory management Industrial efficiency
Publisher: New York (etc.) McGraw-Hill (etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

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showed that frecal matters introduced onthe 29th of August were entirely dissolved on the 16th of September. Iwen kitchen refuse, onion peelings, etc., which at first floated onthe surface, descended after a time to the bottom of the vessel, andawaited decomposition. Everything capable of being dissolved actedin a similar way, and even paper wholly disaj^peared. It is further said : ** The principles on which M. Mouras leases theaction of this machine is that the animal dejecta contain within them-selves all the prin(:i()les of fermentation or of dissolution necessary andsufficient to licpiefy them, and to render them immediately useful intheir return to the soil and without aj)j)recial)le loss. In a later article of the Cosmos-Irs-Moni/cs ( January, 18S3, j). i 10),entitled Theory and Accurate Working of the Automatic Scaven-ger, and written by Abbe F. Moigno, certain additional informa-tion is given, by which the proper dimensions of such a tank may be OF SEWAGE rUR/IICAriO.W 965 1
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GENERAL VIEW OF SEWAGE FILTERS AT SUTTON, SURREY.In the background arc seen the covered tanks formerly used in the chemical treatment. ascertained. M. Mouras is reported to have made the following state-ments. For the complete solution of the floating solid matter aperiod of thirty days should be allowed. The superficial area of thetank should be yV metre per person. The thickness of the top layerof undissolved solid matter should not exceed 0.075 metre (say, 3inches). The depth of the deposit is assumed as 0.02 metre (say, iinch). The depth of the submerged portion of the outflow pipe belowthe surface should be 0.18 metre (say, 7 inches).If we assume: V = daily volume of excreta per person, n = number of persons, a = area of tank, d = depth of tank, which should be at least one metre, if onlyexcreta entered it, s = thickness of floating layer of undecomposed solids, c = thickness of layer of deposited detritus,then the size of the necessary tank may be ascertained from the fol-lowing

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