Specification of William Alexander Lyttle : treating sewage.

  • Lyttle, William Alexander.
Date:
1875
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Alexander Lyttle : treating sewage. Source: Wellcome Collection.

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    Provisional Specification. A.D. 1874.—N° 2446. 3 Lyttle's Improved Process for Treating Seivage. mixture of the entire mass. This filter will answer with animal charcoal in all its manufacturing applications as a filtering agent. If all the charcoal required for the daily use of any town as the means of perfectly clarifying its sewage water and deodorizing the sludge is first put to 5 the work of imparting an extra degree of purity to the drinking water supply of such town, the quantity of charcoal will be so large as compared with the organic impurities of such water that the drinking ■water can thus be rendered absolutely chemically pure without any material deterioration of the charcoal for its subsequent duty to the 10 sewage. The pug mill is provided with a sluice or door at one side of the bottom, through which the exhausted charcoal can be expelled, and the pugging arms are arranged upon a vertical shaft with a gearing for propulsion by any desired power, in the same way as a brickmaker’s 15 pug mill. Any acid or salt useful in precipitating the ammonia or other impurities of the sewage water may be also supplied as part of the charge of the vortex filter when used for sewage, except salts or acids containing sulphur or phosphorus, these being injurious to iron. 20 Chloride of calcium, and many other chemicals are well-known as useful for this purpose. LONDON: Printed by George Edward Eyre and William Spottiswoode, Printers to the Queen's most Excellent Majesty. 18 75.