Artículos relacionados a Report on the sewage disposal problem of New Haven
Sinopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...samples, classified as of low copper content in this way, gave an increase of 101 per cent in colony count between the third and the seventh day of incubation; while 13 samples of high copper content gave a corresponding increase of 349 per cent. The same phenomenon, of delayed colony development on plates, was manifest to an even more marked degree with the Miles acid effluent, no doubt as a result of the action of the sulphur dioxide. Sixty samples of effluents of this type showed an average increase of 560 per cent between the fourth and the seventh day of incubation. With chlorinated effluents no such effect was manifest. Twenty-four samples of effluents treated with 6-8 parts of chlorine showed an increase of only 100 per cent between the 3 and 7 day counts. General Characteristics of th3 East Street Sewage. It appears from the various results, which have been cited above, that the East Street sewage is abnormal in almost all respects. It is the weakest sewage studied at any of the sewage testing stations in the United States, and it contains large amounts of an unusual waste which profoundly affects its chemical and bacterial properties. The presence of copper in sewage has not been noted by any other investigators in this country. It is fortunate that the effect of this disinfectant on biological processes such as the activated sludge and Imhoff tank could be studied experimentally and the difficulties foreseen which must have been encountered had such biological processes been installed on a large scale. Composition of the Boulevard Sewage. The small testing station at the Boulevard sewer was operated from March 22 to April 21, 1918. Composite samples were collected here in the same manner as at East Street and the same analytical determina...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...samples, classified as of low copper content in this way, gave an increase of 101 per cent in colony count between the third and the seventh day of incubation; while 13 samples of high copper content gave a corresponding increase of 349 per cent. The same phenomenon, of delayed colony development on plates, was manifest to an even more marked degree with the Miles acid effluent, no doubt as a result of the action of the sulphur dioxide. Sixty samples of effluents of this type showed an average increase of 560 per cent between the fourth and the seventh day of incubation. With chlorinated effluents no such effect was manifest. Twenty-four samples of effluents treated with 6-8 parts of chlorine showed an increase of only 100 per cent between the 3 and 7 day counts. General Characteristics of th3 East Street Sewage. It appears from the various results, which have been cited above, that the East Street sewage is abnormal in almost all respects. It is the weakest sewage studied at any of the sewage testing stations in the United States, and it contains large amounts of an unusual waste which profoundly affects its chemical and bacterial properties. The presence of copper in sewage has not been noted by any other investigators in this country. It is fortunate that the effect of this disinfectant on biological processes such as the activated sludge and Imhoff tank could be studied experimentally and the difficulties foreseen which must have been encountered had such biological processes been installed on a large scale. Composition of the Boulevard Sewage. The small testing station at the Boulevard sewer was operated from March 22 to April 21, 1918. Composite samples were collected here in the same manner as at East Street and the same analytical determina...
"Sobre este título" puede pertenecer a otra edición de este libro.
- EditorialRareBooksClub.com
- Año de publicación2012
- ISBN 10 0217761569
- ISBN 13 9780217761567
- EncuadernaciónTapa blanda
- IdiomaInglés
- Número de páginas30
- Contacto del fabricanteno disponible
(Ningún ejemplar disponible)
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