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| 1. |
Selection and Application of Dry‐Chemical Feeders |
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Opflow,
Volume 3,
Issue 6,
1977,
Page 1-7
David M. Stearns,
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PDF (1878KB)
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摘要:
This article is a review of the more common parameters which should be considered when selecting a dry‐chemical feeding system. Things to consider in the process requirements are the chemicals, maximum feed rate, rangeability, hydraulics, physical limitations, alternate chemicals and standby. When selecting a specific feeder, the functions of starting and stopping, feed‐rate control and supervisory controls need to be looked at. Chemical handling characteristics such as bulk density and particle size, flowability, solubility, and materials and construction, house keeping and safety and chemical conditioning are also very important to the selection of the feeding system.
ISSN:0149-8029
DOI:10.1002/j.1551-8701.1977.tb00961.x
出版商:Wiley
年代:1977
数据来源: WILEY
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| 2. |
Certification Corner |
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Opflow,
Volume 3,
Issue 6,
1977,
Page 2-8
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PDF (152KB)
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摘要:
This month's “Certification Corner” contains bacteriological samples, weight of a chlorine cylinder, disinfection of a freshly painted storage tank, testing for coagulants, use of carbon in water treatment, Crenothix and Lepothrix.
ISSN:0149-8029
DOI:10.1002/j.1551-8701.1977.tb00963.x
出版商:Wiley
年代:1977
数据来源: WILEY
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| 3. |
PE Service Pipe Squeeze‐off Tool |
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Opflow,
Volume 3,
Issue 6,
1977,
Page 3-3
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PDF (881KB)
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摘要:
When using polyethylene service pipe, a modified pipe cutting tool is capable of squeezing off the flow of water if a repair job becomes necessary.
ISSN:0149-8029
DOI:10.1002/j.1551-8701.1977.tb00964.x
出版商:Wiley
年代:1977
数据来源: WILEY
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| 4. |
Professor Opflow |
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Opflow,
Volume 3,
Issue 6,
1977,
Page 4-4
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PDF (649KB)
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摘要:
Professor Opflow discusses the principles of boost operation and double output.
ISSN:0149-8029
DOI:10.1002/j.1551-8701.1977.tb00967.x
出版商:Wiley
年代:1977
数据来源: WILEY
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| 5. |
Some Do's and Don't's When Dealing With the News Media |
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Opflow,
Volume 3,
Issue 6,
1977,
Page 5-5
Ronald Hedley,
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PDF (85KB)
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摘要:
One of the key aspects to the Safe Drinking Water Act is public notification if the maximum contaminant level is reached. Such information will be published in the newspaper and broadcast on the radio and television. Establishing a good working relationship with the press will be essential and guidelines of do's and don'ts are provided.
ISSN:0149-8029
DOI:10.1002/j.1551-8701.1977.tb00969.x
出版商:Wiley
年代:1977
数据来源: WILEY
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| 6. |
Procedures and Equipment for the Membrane Filter Technique |
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Opflow,
Volume 3,
Issue 6,
1977,
Page 6-6
Richard A. Rock,
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PDF (73KB)
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摘要:
The membrane filter technique is used extensively for drinking water analysis because its speed and direct readout allow for a quick response to suspect drinking water conditions and testing of new mains. The steps followed in the technique are outlined.
ISSN:0149-8029
DOI:10.1002/j.1551-8701.1977.tb00970.x
出版商:Wiley
年代:1977
数据来源: WILEY
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