MIL-HDBK-1165
Contaminated parts will also add the contaminants to the next
process tank.
5.3.3.1
Water Recycling, Reclamation, and Reuse. Water
conservation options for metal cleaning facilities that use rinse
tanks are similar to those for plating facilities. The increased
complexity of some metal cleaning rinse solutions may make
reclamation efforts more difficult. Reclamation for rinse-water
with organic solvent contamination, for example, may require
extra treatment steps to extract the solvent. The amount of
fresh or reclaimed water needed for the rinse tank may be reduced
by reusing water from other sources such as cooling tower
discharges and boiler blowdown. Typically, these waters will
meet the water quality standards for the process specifications.
The volumes of wastewater produced from the spray technique may
not be large enough to warrant implementing retrofits, recycling,
or reclamation systems.
5.3.4
Painting/Paint Stripping Facilities
5.3.4.1
Conventional and Water-Efficient. Painting of items at
military facilities is usually conducted in hangars (aircraft) or
in spray paint booths using spray applicators.
a) Paint spray booths. Water is used in spray booth
ventilation systems to trap paint particles in the air and flush
them away from the operator's breathing space. The water is
supplied from a tank and is constantly circulated through the
system while the booth is used. Upon replacement with fresh
water, the paint-contaminated water likely requires handling as
hazardous waste.
b) Paint stripping. Paint stripping of items at
military installations is also conducted in hangars or other
isolated work areas. Water is used as a rinse to clean off the
applied chemical stripper and the loose paint. Depending on the
size of the object, the quantity of rinse water can be
significant. Items such as aircraft are spray rinsed, smaller
items are generally dipped in rinse tanks.
5.3.4.2
Operational and Maintenance Procedures. The simplest
conservation option for paint and paint stripping facilities is
to alter operational procedures, however, any alterations of your
operating procedures must not conflict with the manufactures
specified parameters. Therefore, before attempting any of the
suggestions below, consult your manufacturer's recommended
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