(b) The multimedia filter removes the large solids that pass through the
input trainer as well as the smaller solids that were acted upon by the chemical
(c) The cartridge fiIter takes out suspended particles that pass through
(d) Reverse osmosis removes dissolved minerals and other bacteria
that succeeded in getting past the fiIters. There are eight of these spiral reverse
osmosis elements in series, one element after the other. The spiral construction of the
elements allows a relatively small space to contain a large area of permeate membrane.
A larger surface area means that more water can be purified.
(e) Chemicals are added to the fiItered water to kiII any remaining
bacterial that are present. At this point, water is stored for human consumption.
(a) The water purification unit, standardized 600--gph ROWPU, (see
figure 1-19), is portable.
(b) The 3,000/2,000 gph is being developed for field use and is being
patterned after a standardized 60G--gph ROWPU. The unit is capable of producing
drinking water from raw, fresh water, seawater, brackish water, and water contaminated
with nuclear, biological, or chemical agents. This ROWPU replaces the 420, 600, 1500,
3000--gph erdlators, and several other miscellaneous water purification units.
Figure 1-19 Water purification unit, reverse osmosis, 600 gph trailer mounted.