DOC-Labor
Dr. Stefan Huber
Marine Water - Example 2
Biopolymers as membrane foulants
Biopolymers are assumed to be primarily responsible for UF and RO membrane fouling.
This is illustrated in this example of 2 sites with heavy or almost no fouling.
The only difference in the raw waters is the concentration and quality of the biopolymer fraction. Of particular importance appears a sub-fraction of biopolymers which elutes at the exclusion volume of the column.
This material is very high in molecular weight
(> 150 kDa) and is referred to by some authors as
”TEP”, although it is - by definition - dissolved
(< 0.45 um).



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Examples: