The Long Beach Water Department (LBWD) is aggressively pursuing seawater desalination as a new source of potable
water for its service area. In addition to testing out the operational feasibility of
various desalting membrane technologies, including the patented two-pass
nanofiltration (NF<sup>2</sup>) process and traditional seawater reverse osmosis, LBWD is also
researching other issues which will be important to address prior to commissioning a
full-scale production seawater desalination plant. LBWD is pursuing an alternative intake and discharge system, which is based on
using perforated laterals placed under the ocean floor to collect or expel the water
through either natural media found on the ocean bed, or alternatively, filter media
placed into an excavated area on the ocean floor (ocean floor system). The intake
system is based on the concept of slow sand filtration (< 1 gallon/min-ft<sup>2M</sup>, (gpm/ ft<sup>2</sup>)),
which should mitigate any negative impacts associated with impingement and
entrainment due to its slow intake rate. Additionally, the collection of seawater
through the filter media may also offer some pretreatment benefits, including
reducing organic and suspended solids. Includes 12 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.2 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 20 |
| Published : | 11/01/2008 |
