Minutes of Proceedings of the Institution of Civil Engineers

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The Institution, 1897
 

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Сторінка 75 - ... making lime water at Crossness, the results have been much more satisfactory than those at Barking Creek. The method of collecting the sludge, settling it, and loading the ships is identical with that at the Northern Outfall works. The fleet of vessels...
Сторінка 40 - The objects sought to be attained by the proposed works, were the interception of the sewage as far as practicable by gravitation, together with so much of the rainfall as could be reasonably dealt with, and its conveyance to points some distance below the metropolitan area.
Сторінка 82 - ... neutral effluent a charge of the proper organism, whatever that may be, specially cultivated for the purpose, retain it for a sufficient period, during which time it should be fully aerated, and finally discharge it into the stream in a really purified condition.
Сторінка 75 - ... Deep, commencing at a point 10 miles east of the Nore, and proceeding thence from 5 to 10 miles down that channel. * * * As the sludge is discharged from the bottom of the vessel some 10 ft. under water, and is thus agitated by the action of the twin screws (of the tank steamer carrying 1,000 tons), the diffusion of the sludge in the water in the wake of the vessel is very complete, so much so that when there is but a slight ripple, the visible effect of the sludge is lost after a few minutes....
Сторінка 82 - Dibdin's 1887 paper, he said: "The lesson to be learned from the numerous experiments published by various authorities, both in this country and on the continent, is that bacteria and other low forms of organic life are most potent in the destruction of all objectionable refuse. Modern experiments show that, when this subject is better understood and thoroughly worked out, in all probability the true way of purifying sewage, where suitable land is unavailable, will be first to separate the sludge,...
Сторінка 87 - Such sand has, however, been carried into the body of the coke, and at present there is no appearance of any danger of choking arising from this cause. The organic matters in solution in the crude effluent absorb, on an average, 3-5 grains per gallon of oxygen from permanganate in four hours, while the filtrate absorbs only 0'7 grain.
Сторінка 71 - By these means much of the existing evil will be abated. "10. But we believe that the liquid so separated would not be sufficiently free from noxious matters to allow of its being discharged at the present outfalls as .1 permanent measure. It would require further purification, and this, according to the present state of knowledge, can only be done effectually by its application to land.
Сторінка 87 - Of the matter thus removed, about 110 tons were organic, the whole of which has been oxidised ; whilst the sand amounted to about 40 tons, which, calculated at 24 cwts. per cubic yard, would cover the filter to a depth of 0'267 inch if spread equally over its surface. Such sand has, however, been carried into the body of the coke, and at present there is r» no appearance of any danger of choking arising from this cause.
Сторінка 333 - ... HOT BENDING TEST FOR WROUGHT IRON. various metals, in the place of simply establishing scales of relative hardness. The following is a table of some of the values obtained : — HARDNESS. Metal. Values of C. Cast steel, normal 554-0 Mild steel, normal 143-5 Copper, annealed 62-0 „ unannealed 105-2 Brass, No. 1 221-0 „ No. 2 246-0 Aluminium, squirted 41-8 alloy, cast 103-5 Lead, cast 4-2 Zinc,' cast 40-8 SHOP TESTS OF IEON AND STEEL.
Сторінка 75 - Nore, and proceeding thence from 5 miles to 10 miles down that channel, which is unused for traffic, being about half way between the Swin Channel, or route for vessels proceeding north, and the Princes Channel, which is the ordinary route for vessels going south. As the sludge is discharged from the bottom of the vessel, some 10 feet under water, and is thus agitated with the seawater by the action of the twin-screws, the diffusion of the sludge in the water in the wake of the vessel is very complete,...

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