ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR INSTRUCTIONS
EXTENDED SHUT-DOWN DURING DEPLOYMENT OPERATION UNDER
USUAL CONDITIONS
INITIAL SETUP
Materials/Parts:
AC-120 Bisulfite Bucket, 10 lb.
Measuring Bottle for Bisulfite (Box #4)
Chemical scoop (Box #4)
AC-350 Caustic, (2) 1 Gallon Containers (Box #5)
Three 2-in. x 10 ft. Cleaning Waste Hoses
Adaptor A-10 (Box #1)
Adaptor A-12 (Box #1)
Cleaning Waste Storage Module if used
One 1500 gallon cleaning waste storage tank
Two Adaptors A-16 (A-TWPS, Box #1)
One 2 in. x 50 ft., green-banded raw water discharge hose if cleaning waste storage module not used
Personal protective gear (Box #1)
Two chemical aprons
One face shield
Two chemical gloves
One dust mask
Personnel Required:
Two Operator/Crew
GENERAL
During deployment, if the TWPS needs to be shut down for longer than 54 hours, an extended shut-down
is performed. An extended shut down includes the following steps:
- The TWPS is shut down.
- The RO elements and the MF modules are flushed with product water.
- The RO elements are preserved by flushing them once with a sodium bisulfite solution.
- The MF modules are preserved by flushing them once with a caustic solution.
Preservation is necessary to ensure that biological growth does not become established on the RO
membrane and MF fiber surfaces during the shutdown period. If they are not preserved and a biological
film grows on the membranes and fibers, the TWPS will not meet performance requirements when placed
back in operation. If the biological growth is severe enough, the RO elements and MF modules will
require extensive cleaning/soaking and may need to be replaced.
NOTE
If the daily high temperatures are lower than 40 degrees F and the TWPS is shaded from
direct sun exposure, biological growth is unlikely to occur. Under these conditions, it
would not be necessary to preserve the RO membranes and MF fibers during an extended
shut-down.
If the TWPS is to be shut down during deployment for longer than 54 hours, and it is not certain how long
the TWPS will be shut down before it is started up again, a long-term shutdown should be performed.
Long-term shut down procedures are described in WP 0031, Preparation for Storage Army Unit or WP
0018 00-1
