Specification of Richard Dover : treating sewage.

  • Dover, Richard.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Richard Dover : treating sewage. Source: Wellcome Collection.

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    Dover's Mode of Treating Seioage. protosulphate of iron and metallic salts will vary from two to six or more ounces. These chemical agents are compounded in the usual manner and do not require more than ordinary care, prudence, or labour in their preparation and application to develope in combination with 5 sewage their inherent antiseptic, prophylactic, and valuable fertilising qualities. Sewage in the ordinary condition, and containing the average quan¬ tities of feculent and other ordinary discharges from the habitations of a populous place, hut uncontaminated with such extraneous refuse as 10 those of dyeworks, paper mills, or other like noxious, valueless, and detrimental elements can he deodorized, its matters concentrated, and the aqueous portion filtered therefrom clean and wholesome, by the admixture of about three pounds of muriatic, or hydrochloric, or any other like efficacious acids, about four ounces oxide of iron, about three 15 ounces protosulphate of iron, and about three ounces of chloride of magnesium, or the other chlorides diluted in about six pounds of water for a ton of such “ average sewage.*5 Quite ninety-five parts in each hundred of the sewage after treatment according to my Invention gravitate away clean and wholesome water, and leave the residuum 20 inodorous and innocuous, hut very valuable in its fertilising qualities. This residuum dries readily without artificial heat, and if kept dry in any airy floor, loft, or warehouse, its valuable fertilising properties are not deteriorated by either time or atmospheric action. It is very valuable also as the basis of a manure for cereal cultivation, and when 25 compounded with the organic, ammonical, and nitrogenous refuse abounding in all populous places is doubly valuable to agriculturists on account of its concentrated condition rendering it available at all seasons and for every locality or soil; added to all which it is entirely free from any of the germs of the parasitical weeds which are inherent in all 30 farmyard and stable manures. The rapid and complete separation of the aqueous portion of the deodorized sewage from the matters is an all important part of the dis¬ posal of the diurnal discharges from every populous place; of necessity, therefore, the action of the filters must he equal to the purification of 35 those diurnal quantities. The filtering capability of the water companies downward system is, in the 12th Report of the Privy Council on the public health, under