Description
This paper presents a review of the major components of membrane systems with a viewtoward evaluating the operation and maintenance (O&M) impacts. Beginning with an initial assessment of raw water qualityand desired finished water quality, the selection between RO vs. NF will be evaluatedconsidering both capital and O&M implications based on raw water blend options and feedpressure differences. Specific components within the membrane system will be addressedincluding pre-treatment, physical and chemical; membrane selection, square footage andphysical configurations; high pressure pump type, and pump and motor efficiencies; use ofvariable frequency drives on high pressure pumps; and general materials of construction andvalve selection. The importance of proper hydraulic design and flow balancing will bediscussed, with particular emphasis on the application of new multi-port vessels and their impacton the O&M of a plant. Misapplication of this new development in the membrane industry cansignificantly affect the life-cycle cost of a plant through several means including increased highpressure pumping energy and shortened membrane life as a result of inadequate cleaningaccess. Other topics will be addressed including energy recovery and instrumentation andcontrols issues. Finally, the paper includes a brief discussion on alternative procurement methods for obtaining a system designed to provide the user with the lowest life cyclecost membrane plant. Specific information developed from the authors’ personal experience inthe industry is incorporated in the discussions. Includes 5 references, table.
Product Details
- Edition:
- Vol. – No.
- Published:
- 03/05/2003
- Number of Pages:
- 19
- File Size:
- 1 file , 260 KB
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
