ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR INSTRUCTIONS
REVERSE OSMOSIS SYSTEM PRESERVATION OPERATION UNDER
USUAL CONDITIONS
INITIAL SETUP
Materials/Parts:
AC-120 Bisulfite Bucket, 10 lb.
Measuring Bottle for Bisulfite (Box #4)
Chemical scoop (Box #4)
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. 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 Operators/Crew
Equipment Condition:
Short Term Shutdown, WP0017, has been performed, the TQG and Air Compressor are left on
All drain and vent valves closed as instructed in WP0018.
Product 3-way valves set to normal operating position as instructed in WP0018.
At least 150 gallons of useable product water must be available in the distribution tanks
GENERAL
RO preservation procedures are performed when the TWPS is placed in an extended shutdown
(shutdown longer than 54 hours during deployment) or when the TWPS is shutdown in preparation for
storage (stand down from deployment). Preservation is necessary to ensure that biological growth does
not become established on the RO element membrane surfaces during the shutdown period. If they are
not preserved and a biological film grows on the membranes, the TWPS will not meet performance
requirements when placed back in operation. If the biological growth is severe enough, the RO elements
will require extensive cleaning/soaking and may need to be replaced.
Sodium bisulfite is used as the preservative for the RO membranes. For an extended shutdown, a
bisulfite preservative solution is flushed through the RO elements once and discharged into a waste tank.
For a shutdown in preparation for storage, the bisulfite preservative solution is recirculated through the
RO elements for a period of one hour, then discharged into a waste tank.
The procedures covered in this work package include:
RO Preservation Flush for Extended Shutdown
RO Preservation in Preparation for Storage (WP0024 procedures must first be performed)
0025 00-1
