ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0020 00
OPERATOR INSTRUCTIONS
CLEANING, PRESERVATION, AND CLEANING WASTE
NEUTRALIZATION AND PUMP-OUT
MF PRESERVATION
The purpose of MF preservation is to prevent biological growth on the MF module fibers when the TWPS
is not being used. If the MF fibers are not preserved, biological growth will clog the fibers and the TWPS
will not meet performance requirements when it is placed back in service.
MF preservation is performed for an extended shut-down during deployment (shut-down greater than 54
hours) and at the end of deployment in preparation for long term storage.
MF preservation for an extended shut-down during deployment involves flushing the MF module fibers
once with a dilute caustic solution. The MF Preservation procedures for extended shut-down during
deployment are described in WP 0026, MF System Preservation.
MF preservation in preparation for long term storage is performed as part of the MF Cleaning with RO
Acid Cleaning procedure described in WP0024. The caustic detergent solution used in the procedure is
not rinsed from the MF system.
CLEANING WASTE NEUTRALIZATION AND PUMP-OUT
This procedure applies whenever the cleaning waste storage tank is used. Table 1 lists the various
cleanings and the approximate neutralization chemical usage.
Table 3. Neutralization Chemicals Required per Cleaning Type.
Cleaning Type
WP
Cleaning Waste Storage
Additional Amount for
Final pH
tank initial charge
Neutralization *
Flushing Preservative/
0014
2 lb citric acid (AC-210)
0 lb Citric acid (AC-210)
pH 9.0
Cleaning Solution from MF at
1 lb Citric acid (AC-210)
pH 7.0
start-up after extended
shutdown
MF Cleaning
0021
20 lb citric acid (AC-210)
0 lb Citric acid (AC-210)
pH 9.0
8 lb Citric acid (AC-210)
pH 7.0
Reverse Osmosis System
0022
None
0 lb Sodium carbonate
pH 4.3
Acid cleaning
25 lb Sodium carbonate
pH 7.0
Reverse Osmosis System
0023
None
0 lb Citric acid (AC-210)
PH 10.0
Detergent Cleaning
5 lb Citric acid (AC-210)
PH 7.0
Micro-Filtration System
0024
20 lb citric acid (AC-210)
0 lb Citric acid (AC-210)
pH 9.0
Cleaning with Reverse
8 lb Citric acid (AC-210)
pH 7.0
Osmosis System Cleaning
Reverse Osmosis System
0025
Always combined with micro-filtration system preservation
Preservation
Micro-Filtration System
0026
10 lb citric acid (AC-210)
0 lb Citric acid (AC-210)
pH 9.0
Preservation
4 lb Citric acid (AC-210)
pH 7.0
* If using the 3 L priming pitcher to measure out citric acid, 1 lb of citric acid is equivalent to 300 mL.
0020 00-4
