Specification of Henry Bird : treating sewage matters.

  • Bird, Henry.
Date:
1865
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Henry Bird : treating sewage matters. Source: Wellcome Collection.

    7/8 (page 5)
    5 _Bird's Improvements in Treating Sewage Matters. when separated for the most part from the waters with which they were previously combined are allowed to drain, and it is desirable that they should become as dry as possible by being spread out in suitable and well-ventilated sheds or otherwise, after which a quantity of sulphuric acid, by preference ^ of about the strength above mentioned, is mixed therewith in the proportions of about 2S4 lbs. of sulphuric acid to each ton of the dry or nearly dry pre- cipitated matters. Or the sulphuric acid may be first combined with clay as above described, and the sulphated clay combined with the precipitated matters, which are then to be piled into a heap and allowed to stand till they are cooled 10 and dry, when they will be fit to be used as manure, either alone or mixed with other manuring substances. In consequence of the composition of sewage varying so greatly in different places and at different times at the same place, no precise rule can be given as to the quantity which should be used in each case, but a little experience 15 will enable a manager of such works to judge of the effect produced by the sulphated clay, and he will readily ascertain when he is applying such clay with advantage by observing whether the precipitation is sufficiently ample by examining the state in which the sewage water is coming away from the reservoirs at the outlet. The scum or floating matters are to be removed by ^0 skimming from time to time as required. In witness whereof, I, the said Henry Bird, have hereunto set my hand and seal, this Thirteenth day of June, in the year of our Lord One thousand eight hundred and sixty-five. HENRY BIRD, (l.s.) LONDON: Printed by George Edward Eyre and William Spottiswoode, Printers to the Queen’s most Excellent Majesty. 1865.