Fifteen Years Filtration Practice in Indianapolis
Fifteen Years Filtration Practice in Indianapolis
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In our eReader you can find the full English version of the book. Read Fifteen Years Filtration Practice in Indianapolis Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Fifteen Years Filtration Practice in Indianapolis
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In new filters, and in old filters which have been out of operation for a considerable period, normal bacterial results do not appear to be obtained until these films are formed.
"4. In old filters which are in regular operation, and which yield normal chemical and bacterial results, a marked deterioration in these results occurs when for any reason these is a well-defined mechanical disturbance of the main body of sand, whereby the continuity of the films is broken to a certain degree. " * * *... "5. Low rates are undoubtedly safer than high rates ; but, nevertheless, up to ascertain limit the rate apparently exerts very little influence, and this limit is different for different filters and varies with other conditions in the case of the same filter. " * * * "6. With our present knowledge it may be stated that the factor which causes the effect of the rate of filtration upon bacterial efficiency to become practically nil, under normal conditions, is chiefly the age of the filter. " In the operation of the Indianapolis plant, the studies made during the fifteen years make it possible to add to these observations the following: The pre-treatment by coagulant of a water supplied to slow sand filters results in the grouping together of the sus- pended particles in fairly large aggregates which substitute in a measure for the sticky coating of the surface layer.
What to read after Fifteen Years Filtration Practice in Indianapolis?
You can find similar books in the "Read Also" column, or choose other free books by Harry Edward Jordan to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In new filters, and in old filters which have been out of operation for a considerable period, normal bacterial results do not appear to be obtained until these films are formed.
"4. In old filters which are in regular operation, and which yield normal chemical and bacterial results, a marked deterioration in these results occurs when for any reason these is a well-defined mechanical disturbance of the main body of sand, whereby the continuity of the films is broken to a certain degree. " * * *... "5. Low rates are undoubtedly safer than high rates ; but, nevertheless, up to ascertain limit the rate apparently exerts very little influence, and this limit is different for different filters and varies with other conditions in the case of the same filter. " * * * "6. With our present knowledge it may be stated that the factor which causes the effect of the rate of filtration upon bacterial efficiency to become practically nil, under normal conditions, is chiefly the age of the filter. " In the operation of the Indianapolis plant, the studies made during the fifteen years make it possible to add to these observations the following: The pre-treatment by coagulant of a water supplied to slow sand filters results in the grouping together of the sus- pended particles in fairly large aggregates which substitute in a measure for the sticky coating of the surface layer.
What to read after Fifteen Years Filtration Practice in Indianapolis?
You can find similar books in the "Read Also" column, or choose other free books by Harry Edward Jordan to read onlineMoreLess
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