GB190425591A - Process of and Receptacles for the Treatment of Sewage. - Google Patents

Abstract

25,591. Neilson, M. M. Nov. 24. Sewage and foul waters, treating; aÙrating; bacteriological p r o c e s s e s; tanks for.-Sewage supplied by the pipe A, Fig. 1, is aerated in the tank shown, and a special bacterial culture added. The discharge pipe B is placed at the opposite end of the tank. Air enters through its upper end and passes away through a ventilating-pipe C or through the supply pipe A. Or an additional pipe may be furnished through which air supplied by the pipe C is drawn away. Air may be carried into the body of the liquid by water from kitchens, sinks, &c., which falls from the conduit D. Sand, ashes, or mineral matters are deposited and drawn off through a pipe connected with the bottom of the tank. In a modified form, the sewage and air are delivered by pipes F, H, Fig. 3, respectively, below a perforated false bottom G of brickwork, cement, or the like, supporting a layer of rough material or of slabs. The sewage may be passed through two or more tanks communicating by pipes or tubes in the sides of the tanks below the liquid level. From the aerobic tanks, the effluent flows to a trough which discharges automatically into the channels a of a filter bed K, Fig. 4. The top layer of medium consists of fine gravel, the lower ones being of coarser material and the bottom one of large stones. The filtered liquid is collected by pipes b and run into an airtight tank T, in which micro-organic life is said to be destroyed.