It is almost unnecessary to add that where sewage is treated in any other manner than that of throwing it into the sea or river, bulk is a great objection, especially if it has to be pumped.
To obviate this bulk the separate system is of great advantage, and Isaac Shone’s new method for ejecting sewage along pipes seems also to be a most desirable invention in connection with this subject.
[187] It is computed that every ton of liquid sewage which is treated chemically costs about three-quarters of a farthing.
[188] Vide ‘Sewage Disposal,’ by Henry Robinson, C.E., &c., 2nd edition, p. 79.
[189] I purposely omit (Kendal) 856, as this is, properly speaking, “filtration.”
[190] For much interesting information upon this and other subjects in connection with sewage disposal, see ‘Minutes of Proceedings of the Institution of Civil Engineers,’ vol. xlviii. p. 105 et seq. Also the report of a committee of the Local Government Board on Modes of Treating Town Sewage, 1876. ‘Sewage Disposal,’ by Henry Robinson, C.E., and other works on the subject.
[191] Under the Rivers Pollution Act, no effluent is allowed to enter a stream &c., if it contains more than three parts of suspended inorganic matter, and one part organic matter for every 100,000 parts of liquid.
[192] Vide ‘Minutes of Proceedings of the Institution of Civil Engineers,’ vol. xlviii. p. 179.