MIL-HDBK-1005/9A
be separated by ED into NaOH and chromic acid, both of which are
recycled. ARO will then separate the water to be recycled and
brine salts for disposal.
d) Metallic Replacement. Silver or copper recovery
can be achieved by using the replacement process where a metal
that is more chemically active than the metal to be recovered is
placed into the waste solution. The more active metal goes into
solution, replacing the less active metal which precipitates (or
plates) out and is recovered. Zinc or iron, in the form of
either dust or finely spun wool, is often used to recover silver
or copper. Unlike evaporation or ion exchange, relatively clean
water is not recovered in this method.
e) Electrodeposition. Electrolytic recovery can be
used to recover valuable metals such as silver or copper. When
a direct electrical current of the proper density is passed
through the wastewater of a single plating process, the metal in
solution plates out in a pure form on the cathode.
f) Operating Requirements. Most reclamation systems
require sophisticated equipment; thus, the ability of the
operating personnel and the manner in which the Navy operates a
specific facility may limit the use of some recycle processes.
2.6.3
Hazardous and Toxic Substances. Special handling,
treatment, and disposal procedures are required for hazardous
and toxic substances that may be encountered at Naval
facilities. Refer to MIL-HDBK 1005/13, Hazardous Waste Storage,
and to the hazardous waste management plan of the facility.
Refer to OPNAVINST 4110.2, Hazardous Material Control and
Management, for guidance on hauling and disposal of hazardous
materials.
2.6.4
Pretreatment Process Selection. Wastewater from Navy
industrial facilities will be discharged to a POTW sewer system
or to a separate NOTW system for receiving industrial waste. In
either case, pretreatment will normally be required to either
minimize the interference upon subsequent treatment processes or
to provide more effective treatment on a special waste stream.
Table 6 summarizes the common pretreatment operations, which
must be considered at Naval facilities. Selection guidelines
require that sufficient pretreatment be provided to satisfy
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