Each water treatment plant design requires consideration of numerous criteria
to determine the optimum process for the unique application. The selection of
low-pressure membrane systems is no different. This paper presents the design
considerations and general needs for successful low-pressure membrane
system selection. There are several options to consider when evaluating low-pressure
membrane filtration as a potential solution. Today, there are a range of
low-pressure membrane systems available with varying membrane chemistry,
pore size, module configuration and operating restrictions. Each membrane
process has specific operating characteristics inherent to its unique properties.
For each application the overall system design and the scope of work required
from the system supplier are equally important in the selection process.
The evaluation process needs to determine the critical operating parameters
such as flux, trans-membrane pressure (TMP), backwash interval, chemical
cleaning process and frequency, waste volume, and coagulation chemistry, if
required, for successful scale-up operation of the full-scale system. The full-scale
system should be based on a pilot test or representative data for the
specific membranes that will be applied. There are other factors to be evaluated
that are not easily quantifiable. A key consideration is the method to monitor
membrane integrity and the ease of detection, isolation and repair of individual
fibers or modules. Other considerations are robustness of the system design,
availability of local service, and process support capability in the event of an
unusual process upset. The evaluation should also consider the compatibility of
the system to accept technological improvements. Includes 3 references.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 190 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 9 |
| Published : | 03/05/2003 |
