This powerpoint presentation begins by providing a brief overview of the Long Beach Water Department (LBWD) demonstration facility and plant performance. Study hypotheses included the following:
fouling is not easily detected by monitoring plant (system)
level pressures, flows, and concentrations until it is severe
(i.e., thick fouling layers); and,
viable bacteria colonize the membranes, but fouling is not
observed until adequate nutrients are available to stimulate
bacterial growth and biofilm formation. Study objectives were to:
verify the presence of fouling material on seawater NF/RO
membranes at LBWD;
identify the type of fouling material that accumulates on
seawater NF/RO membrane surface at LBWD; and,
evaluate the chemical cleaning methods for removing fouling
material from seawater NF/RO membranes at LBWD. Experimental methods presented include cleaning protocols and autopsy analyses. Summary indicates that:
no evidence of fouling from plant level operational data;
autopsy results demonstrated that
first pass membranes fouled similarly, there was
very little fouling on NF pass 2, and there was
viable, culturable marine bacteria on all membranes;
cleaning results indicated that
commercial cleaning was more effective for SWRO than SWNF. Includes figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.3 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 11/01/2009 |
