Sewage Disposal Works: A Guide to the Construction of Works for the Prevention of the Pollution by Sewage of Rivers and EstuariesC. Griffin, limited, 1890 - 277 páginas |
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Términos y frases comunes
acid acres admit alumina ammonia amount average Balsall Heath Bedford Birmingham Board Borough carbon carriers cent chemical clay cleansing Commissioners constructed contains Corporation cost crop cubic cylinders deposit discharged district drainage drains effluent water engines feet ferozone filter filter-press filtration Frederick Bramwell Friern Barnet gallons gallons of sewage grains per gallon inches Inst intercepting sewers iron irrigation Joseph Bazalgette land lime liquid mangolds manure means midden milk of lime million gallons mixed moisture necessary nitrification nitrogen nuisance organic matter outfall sewer outlet oxide oxidising oxygen passes pipes placed plant Plate polarite pollution population portion precipitation present produced purification quantity rainfall ratable value river river Wandle Rural Sanitary Authority rye-grass Saltley settling tanks sewage disposal sewage farm sewage flow sewers sludge soil solids subsoil sufficient surface suspended matters Thames tion tons towns treated treatment utilisation volume of sewage water-closets whilst Wimbledon yards
Pasajes populares
Página 82 - ... per cent of sewage, we are led, in each case, to the inevitable conclusion that the oxidation of the organic matter in sewage proceeds with extreme slowness, even when the sewage is mixed with a large volume of unpolluted water, and that it is impossible to say how far such water must flow before the sewage matter becomes thoroughly oxidised.
Página 16 - Any liquid which contains, in 100,000 parts by weight, more than one part by weight of sulphur, in the condition either of sulphuretted hydrogen or of a soluble sulphuret. (h) " Any liquid possessing an acidity greater than that which is produced by adding two parts by weight of real muriatic acid to 1,000 parts by weight of distilled water.
Página 276 - A MANUAL OF APPLIED MECHANICS : Comprising the Principles of Statics and Cinematics, and Theory of Structures, Mechanism, and Machines. With Numerous Diagrams Crown 8vo, cloth.
Página 15 - Any liquid which shall exhibit by daylight a distinct colour when a stratum of it one inch deep is placed in a white porcelain or earthenware vessel. " (d) Any liquid which contains, in solution, in 100,000 parts by weight, more than 2 parts by weight of any metal except calcium, magnesium, potassium, and sodium.
Página 18 - With regard to the various processes based upon subsidence, precipitation, or filtration, it is evident that by some of them a sufficiently purified effluent can be produced for discharge, without injurious result, into water-courses and rivers of sufficient magnitude for its considerable dilution;* and that for many towns, where land is not readily obtained at a moderate price, those particular processes afford the most suitable means of disposing of water-carried sewage.
Página 17 - ... 4. That most rivers and streams are polluted by a discharge into them of crude sewage, which practice is highly objectionable. "5. That so far as we have been able to ascertain, none of the existing modes of treating town sewage, by deposition and by chemicals in tanks, appear to effect much change beyond the separation of the solids and the clarification of the liquids.
Página 116 - I need not follow this head any further, except to remark that in February 1887 I submitted a report upon the subject to the Society of Arts in London, in which I conclusively proved that in no single instance out of nearly 100 cases in which sewage has been utilised by broad irrigation, had any fact been proved to establish the allegations of ' insanitariness ' which are sometimes raised against them.
Página 80 - Whenever and wherever there is decomposition of organic matter, whether it be the case of an herb or an oak, of a worm or a whale, the work is exclusively done by infinitely small organisms. They are the important, almost the only, agents of universal hygiene; they clear away more quickly than the dogs of Constantinople or the wild beasts of the desert the remains of all that has had life...
Página 26 - That it is desirable we should inquire further " what measures can be applied for remedying or preventing" the evils and dangers resulting from the sewage discharge. CONCLUSIONS AND BECOMHENDATIONS SECOND REPORT. 1. Our opinion of the evils described in our First Report, as resulting from the present system under which sewage is discharged into the Thames by the Metropolitan Board of Works, is much strengthened, and we believe these evils imperatively demand a prompt remedy.