ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0021 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR INSTRUCTIONS
MICRO-FILTRATION SYSTEM CLEANING OPERATION UNDER
USUAL CONDITIONS
MF cleaning consists of two cleaning stages. In the first stage the MF fibers are cleaned with a low pH,
acid solution. AC-210 Citric Acid is used for the acid cleaning. In the second stage the MF fibers are
cleaned with a high pH, caustic detergent solution. AC-310 detergent plus AC-350 caustic are used
together for the caustic detergent cleaning. Both cleaning stages are required to properly clean the MF
fibers.
Extended cleaning is required if the operator has chosen to wait 40 hours after the first transmembrane
pressure (TMP) alarm, the maximum TMP has been exceeded, the water temperature does not reach at
least 100 F during the cleaning cycle, or the TMP is higher than the normal reading after cleaning (3 to 5
psi at 50 to 60 gpm MF Feed Flow).
MF CLEANING
The procedures that follow describe the steps for performing MF Cleaning.
MF Backwash
1. Set up the Cleaning Waste Storage Tank if needed as follows (see Figure 1):
a. Set up the Waste Tank within 30 feet of the TWPS waste out connection. Face the
female tank connection toward the TWPS skid.
b. If the terrain allows, set the tank at an elevation so that the top of the full tank will be
below the bottom of the RO Feed Tank.
c. Connect an A-16 Adaptor to both connections on the waste tank. Close shut-off valve V-
706 on both of the A-16 adaptors.
d. Be sure that the zipper on the waste tank is zipped closed.
SHUT-OFF VALVE
V-706
ADAPTOR A-09
TOP
6 X 50 WASTE HOSE
VIEW OF
TWPS
4 X 5 S-HOSE
ADAPTOR A-16
CLEANING WASTE TANK STORAGE TANK
ADAPTOR A-16
Figure 1. Cleaning Waste Storage Tank Set-Up.
e. In combat deployment the waste may be discharged into a depression in the ground
located at an elevation below the TWPS.
0021 00-2
