As membrane facilities increase in number and age, the need for upgrading the older facilities has
continued to be required. Although many existing plants have implemented rehabilitation and
replacement programs, little information has been published in the literature on this component of
membrane plant operation and maintenance. Several key upgrade components include the following: well
field and raw water feed lines; process pretreatment; membrane process; post-treatment; concentrate
disposal; odor control and ancillary facilities (if required); storage; high-service pumping; and distribution
system considerations.
Specific items related to upgrading the membrane process can include the cartridge filters, high-pressure
feed pumps, membrane elements, and operation monitoring systems. Other considerations can include
PLCs and distributed control systems, SCADA and the use of VFDs in rehabilitation upgrade activities.
Newer generation or modified membranes are thus placed into facilities that had been designed for an
older model or version, which may require that newer operating conditions be employed to compensate
for water transfer performance changes. Consequently membrane replacement requires careful planning,
and should involve computer modeling, membrane probing, membrane profiling and hydraulic
evaluations to document modifications in plant performance. Includes 17 references, table, figure.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 260 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 03/05/2003 |
