Slow sand/nanofiltration treatment for secondary treated wastewater

✍ Scribed by C.Brent Cluff

• Book ID: 103059571
• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 985 KB
• Volume: 88
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(92)80105-i

✦ Synopsis

The subject of slow sand/nanofiltration of municipal wastewater is discussed . Results of testing in Phoenix, Tucson and Tempe, Arizona are given as evidence that this technique will provide a low salinity water suitable for many types of reuse . The slow sand filter is a gravity filter which utilizes biological processes to remove dissolved organics . Only the surface of the sand bed is disturbed when cleaned . The slow sand filter is an excellent prefilter to the nanofilter membrane reducing organic scaling . The nanofilter membrane reduces salinity and hardness nitrates, heavy metals and other pollutants as well as significant amounts of dissolved organics .

The combination of slow sand/nanofiltration treats wastewater the way it needs to be treated in order to be either safely disposed of or reused without significant negative environmental impacts .