Water Treatment Devices Research Articles

Alternatives to Central Water Treatment

This discussion on the role of bottled water, point‐of‐use, and point‐of‐entry water treatment devices took place during the annual conference in Denver on June 25, 1986. Participants were: Donna M. Cirolia, director of government affairs for the Water Quality Association, Washington, D.C.; Michael B. Cook, director of the Office of Drinking Water, US Environmental Protection Agency, Washington, D.C.; Merrill R. Fie, president of the Deep Rock Water Company, Denver, Colo.; August A. Guerrera, president of A. Guerrera Associates and chairman of the New York Section of AWWA, Hauppauge, N. Y.; Nina I. McClelland, president of the National Sanitation Foundation, Ann Arbor, Mich.; Michael J. McGuire, director of water quality for The Metropolitan Water District of Southern California, Los Angeles, Calif.; and Lee T. Rozelle, vice‐president in charge of science and technology for Culligan International Company, Northbrook, Ill. Michael E. Burke, moderator of the panel, is director of the Bureau of Public Water Supply Protection of the New York State Department of Health, Albany, N. Y.

Bacterial Colonization of Point‐of‐Use Water Treatment Devices

Point‐of‐use water treatment devices were investigated to identify organisms that may colonize these filters, to determine the magnitude of the postcolonization release of microorganisms into the product water during daily use or after periods of nonuse, and to demonstrate the effect of tap water of marginal bacteriological quality on the quality of the product water. The bacterial count was found to vary between units of different design, between units of the same design, and between water samples from the same filter unit collected at different times of the day; it was affected by the length of time the filter cartridge had been in use, the design of the cartridge, and the temperature of the water, as well as by the species of microorganism.

工場廃水処理装置の最近の動向(<小特集>水処理小特集)

工場廃水処理装置の最近の動向(<小特集>水処理小特集)