reaches the slurry draw-off port (see figure 1-7) where it flows through the slurry weir
box (see figure 5-10, circle L) to the sludge concentrator tank (see figure 5-10, circle M).
The level of the slurry blanket in both the erdlator tank and the sludge concentrator tank
is regulated by the sludge concentrator valves (see figure 1-7). The slurry level in the
sludge concentrator tank should be maintained even with the top rim of the circular
baffle, and the slurry blanket in the erdlator tank should be kept at a level which wiII
keep the slurry draw-off port just visible.
(6) Wet well warning buzzer and Iight. The operation of the wet well
warning buzzer and red Iight indicates that the water in the wet well is low. This could
be caused by any of the following:
(a) Suction strainer clogged.
(b) Raw water hoses damaged or clogged.
Raw water pump faiIs to deliver sufficient water.
(e) Valves not properly positioned.
(7) Filter operation check. Should any of the following occur, the fiIter
should be backwashed and flushed.
(a) Large areas of the fiIter elements are not covered with
Suspended material is visible in the filtered water or the water
The effluent pressure gage (see figure 5-11, circle E) indicates less
than 4 psi.
(d) The fiItered water flow drops noticeably, indicating that it is no
longer practical to continue the fiIter run.
5-12. INSTALLATION OF REVERSE OSMOSIS WATER PURIFICATION
Figure 5-15 illustrates a typical ROWPU site selection. When choosing the site
to set up and run the ROWPU. Remember to follow these important procedural points: