Specification of Edwin Hills and Benjamin Biggs : treating sewage.

  • Hills, Edwin.
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Edwin Hills and Benjamin Biggs : treating sewage. Source: Wellcome Collection.

    7/20 (page 5)
    Hills 8f Biggs' Improvements in Treating Sewage. furnished with the necessary pipes, valves, and openings for the intro¬ duction of the lime and air for the ingress of the sewage, for the egress of the purified effluent, and for the withdrawal or removal of the sewage precipitate or sludge which may he dried and used as a manure. 5 Where hydrated oxide of iron is used as aforesaid the chamber in which it is to he used is furnished with man-holes for the insertion and removal of the said oxide. According to another process, instead of forcing atmospheric air through the sewage or other excrementitious matters in the first tank, we 10 force into such sewage or matters sulphurous acid (in vapour or in solution), and thereby precipitate or promote the precipitation of the solid parts of such sewage or matters, which is or are thus deodorized, and also fix the ammonia and decompose the sulphuretted hydrogen and obtain sulphur therefrom. The sewage precipitate or sludge thus 15 obtained may either he dried and used as a manure, or it may he burnt so as to cause it to give off its sulphur in the form of sulphurous acid gas, or he otherwise utilized. In this last described process the acid tanks herein-before referred to are not required. Having now described the nature of our Invention we will proceed to 20 describe the manner in which the same is to be performed, reference being had to the accompanying Drawings and to the letters and figures marked thereon, in respect of which we would observe that the same letters indicate the same parts in all the Eigures. Eigure 1 represents in vertical longitudinal section (taken on the 25 line A, B, Eigure 2, an arrangement of apparatus suitable for carrying into effect the process herein-before first described; Eigure 2 is a plan of the said apparatus. a\ a2, are tanks into which the sewage or other matters is or are alternately run through branch pipes b\ b\ respectively, which pipes are bolted to the sewage main b. The pipes b\ bi\ are 30 furnished with valves b\ b\ for admitting and shutting off the sewage as herein-after described; c1, c%, are hoppers through which the lime is put into the tanks, which hoppers are furnished with valves c\ one of which is seen in Eigure 1; d\ d\ d\ d\ are perforated pipes bolted to branch pipes d\ d\ furnished with valves d\ d\ which pipes are bolted 35 to a main through which air is forced by a pump fan or other suitable blowing apparatus ; e1, e2, are pipes which communicate with the pipe ez, bv which the gases are conveyed from the tanks a1, a2, to the tank f.