摘要:

This article was presented as a paper at the 41st Annual Meeting of the South Dakota Water and Wastewater Association, September 1975. The Sioux Falls Water Department was faced with a problem: how to rejuvenate four Raney horizontal collector wells constructed in 1957 that had declined in production to as little as 60 percent of their original capacity of 1400gpm. An informal proposal from a well‐cleaning contractor revealed that it would cost approximately $17,000 to mechanically clean one 50‐ft deep well with 480 ft of 8‐in. slotted horizontal collector pipe. Needless to say the price was hardly attractive especially since the water department owned six such wells. (Two more were under construction.) This article discusses the alternative restoration method that they chose, including the outcome of the project.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1976.tb00858.x

出版商:Wiley    

年代:1976

数据来源: WILEY

摘要:

The Sandusky Water Distribution Department in Ohio is solely responsible for the installation of all fire hydrants and their subsequent maintenance. The installation process and maintenance procedures are described.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1976.tb00860.x

出版商:Wiley    

年代:1976

数据来源: WILEY

摘要:

Lubrication is very important to the long life of water and wastewater equipment. Accurate records, proper viscosities, and cleanliness are all elements of lubrication maintenance. Special attention must be given to seals and gaskets to keep them in working order.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1976.tb00861.x

出版商:Wiley    

年代:1976

数据来源: WILEY

摘要:

This article was excerpted from AWWA 1974 WQTC papers. Discussed are AWWA standards for the disinfection of water mains and recommendations covering the areas of protection of new pipe sections at the construction site, restriction on the use of joint‐packing materials, preliminary flushing of pipe sections, pipe disinfection, and bacteriological testing for pipe disinfection.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1976.tb00862.x

出版商:Wiley    

年代:1976

数据来源: WILEY

摘要:

The questions in this month's “Certification Corner” deal with microorganisms such as algae, anabaena, and protozoa.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1976.tb00863.x

出版商:Wiley    

年代:1976

数据来源: WILEY