Full Description

The Clark County Water Reclamation District (CCWRD) is investigatingnew wastewater technologies for improving overall plant performance and as analternative for installation in remote reclamation facilities to provide unrestrictedreclaimed water. One such technology is the Membrane Bioreactor (MBR) whichcombines activated sludge treatment with a membrane liquid-solid separation process.The membrane component using low-pressure membranes such as microfiltration (MF)or ultrafiltration (UF) takes the place of clarification and tertiary filtration found inconventional treatment plants. The use of membranes is of particular interest forexpansion of the Central Plant and as a means of increasing effluent quality to meet theever-tightening standards for discharge into the Las Vegas Wash.An MBR facility at the Central Plant would not be able to take advantage of the smallfootprint for such facilities since design is currently progressing to construct facilitiesthat will provide full secondary treatment for the ultimate flow to the Central Plant.Membranes in an ultrafiltration configuration would allow the Central Plant to producean effluent of higher quality than currently possible with the existing filtration anddisinfection facilities.CCWRD conducted studies using microfilter (MF) and ultrafilter (UF) membranes andpilot systems provided by several leading manufacturers in the membrane industry.The pilot studies evaluated the use of the membranes on aeration basin mixed liquor(MBR configuration) and clarifier effluent (UF configuration). The paper lists various areas of researchneeded to evaluate the viability of the membrane process for effluentquality improvement and water reclamation, and for ensuring successful design andoperation of planned facilities. Includes figures.

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Edition: Vol. - No. Published: 03/01/2005 Number of Pages: 8File Size: 1 file , 300 KB