Membrane and Desalination Technologies - TCE Moodle Website

168 N.K. Shammas and L.K. Wang
Fig. 4.5. Schematic of a typical vacuum-driven system in deposition mode with continuous seeding
and grab sampling.
Fig. 4.6. Schematic of a typical vacuum-driven system in suspension mode with continuous seeding
and grab sampling.
mode, such as most MF/UF and MCF systems, the value of the VCF is one, and thus, the
recovery does not have a significant impact on the suspended solids concentration. However,
it is still recommended that systems operating in deposition mode process at least 90% of
the challenge test solution, thus resulting in an effective recovery of at least 90%. Similarly,
for MF/UF systems that operate in suspension mode but without a concentrate waste stream
(i.e., a bleed stream), it is also recommended that at least 90% of the challenge test solution be