This powerpoint presentation begins by providing a brief overview of the general mechanisms of biofilm formation. Study hypothesis is stated as:
unique solution chemistry
condition of seawater:
the high ionic strength
(eliminate electrostatic double layer interaction
van der Waals and short-range interactions
become dominant),
divalent cations; and, a given bacteria at a particular growth state will deposit more
rapidly on more hydrophobic, rough surfaces. The experimental method included direct observation. Experimental materials were bacteria, membrane, and solution chemistry. Topics presented include: multi-probe liquid contact angle; bacteria and membrane properties; summary of adhesive energies; deposition result of different SWRO membranes and different chemistry solution; and, hydrodynamic condition - effect of cross flow velocity and permeate flow rate. Concluding remarks: H. pacifica is extremely hydrophilic; SWHR is very hydrophilic; SWC3+ is relatively hydrophobic; and, it is not clear why the more complex seawater matrix produces more hydrophilic membranes, less adhesion force, and lower deposition. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 6.2 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 16 |
| Published : | 11/01/2009 |
