Specification of Fritz Hillè : manufacture of deodorizing and disinfecting compounds, treatment of sewage, &c.

  • Hillé, Fritz.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Fritz Hillè : manufacture of deodorizing and disinfecting compounds, treatment of sewage, &c. Source: Wellcome Collection.

    4/18 (page 2)
    mile's Improvements in Deodorizing and Disinfecting Compounds, 8fc. and impure waters, and in closets and apparatus for tlie treatment of sewage. The disinfecting compound I prefer to use consists of lime, tar, chloride of magnesia, to which I put sometimes alum, chloride of calcium, or other ingredients which may he found useful for the purpose 5 in the locality such as clay. I manufacture this compound in casks, the size of which depends on the quantity of sewage I have to deal with. The casks are hy preference filled with the compound, so that one cask shall last six or twelve, or twenty-four hours, according to the size of sewage works, and I prefer to manufacture the stuff once a 10 month, say forty casks altogether, more or less as to quantity required, for every day one or more casks, and sufficient reserve casks in case of rain or accidents. The cask may he placed where the sewage flows into a depositing tank, or before that point, and a stream of water he led against the open part of the cask, so as gradually to dissolve the 15 disinfecting agent. The solution of disinfectant is allowed to drop or flow into the sewage, and is thoroughly mixed therewith by means of an agitating wheel. The water employed to dissolve the disinfectant may he the water resulting from the purified sewage. By the use of casks to contain the disinfecting compound I reduce manual labour to 20 a minimum. The amount of disinfectant supplied to the sewage may he regulated hy the employment of a tap to govern the stream of water or the force with which it flows against the compound, and the mixture will flow continuously into the sewage day and night without extra labor. 25 The following is the manner in which I manufacture the disinfecting compound :—Two hundred pounds of best chalk lime are slacked with about four hundred and fifty pounds of water, and when the lime is at the greatest heat, I introduce (where I take no special regard to the produc¬ tion of manure, and where I chiefly regard the sanitary point of the 30 question,) fifteen pounds of refined gas tar. These two are mixed so that every particle of the mixture is of the same greyish color, and that the tar has become entirely taken in hy the lime. No oil must he visible on the top of the mixture otherwise the mixture, is not well made. When I have produced a homogeneous mass I introduce into it forty pounds 35 of calcined chloride of magnesia, dissolve beforehand in water, and if necessary a quantity of alum or of chloride of calcium. Then the stirring is continued till every particle of the two chlorides is dissolved.