TM 10-4610-310-14
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6. Booster Pump
Booster pump is used to draw water from the settling tank and into the UF module. It has 3/4 inch
polypropylene fittings.
NOTE
For a complete listing of hoses used, refer to table 1 in WP 0009 00.
7. Ultrafiltration Module
The primary function of the UF module is to pre-filter the water before the RO membranes. It is accomplished by
means of three 35-mil UF cartridges that can filter suspended particles, bacteria and microorganism and are
capable of producing filtrate water with less than (0.1) NTU. The UF membranes offer the advantage of
prolonged RO membrane life due to micron size removal regardless of the feed water conditions and elimination
of disposable filters.
The filtrate is then stored in the filtrate tank.
8. Filtrate Tank
A 40-gallon capacity filtrate tank is attached to the UF module. The purpose of this filtrate tank is to provide
filtrate for backwash and fast flush while allowing continued operation of the high-pressure pump and thus
potable water production.
9. Backwash Pump
The backwash pump is used to draw water from the filtrate tank for backwashing and fast flushing operations,
which are explained later in this work package.
10. High-Pressure Pump
High-pressure pump is driven by a diesel engine and is used to pressurize the filtrate water up to 1200 psi for
the RO membranes. The pump draws the water from the filtrate tank on the UF module and feeds the RO
module by means of a braided stainless steel hose.
11. Reverse Osmosis Module
The Reverse Osmosis module consists of seven RO membranes in series for removing dissolved solids. The
water is fed from the high-pressure pump and the high-pressure forces the water through the RO membranes.
Approximately 30 % of the filtrate is recovered as permeate and passed on to the chemical module. The rest of
the concentrate or brine is discharged as reject.
12. Chemical Module
The permeate from the RO module is passed through the chemical module where it is metered in the totalizer
and receives the chlorine injection for residual disinfection. Coagulant injection is initiated when drawing from
Turbid source water (higher than 150 NTU) and Antiscalant injection is initiated when the drawing from seawater
(at or above 20,000 ppm source water). Bisulfite is injected when drawing from a chlorinated water source. Only
the chlorine injection is mandatory. The other chemicals are to be injected depending on source water
conditions.
NOTE
NBC cartridges are to be deployed between the RO and Chemical modules.
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