MIL-HDBK-1005/16
a)
Advantages of these systems include the following:
(1) Usually, recycling units are above ground
systems which reduce the risk of undetected leaks in below-ground
oil/ water separators.
(2) To further enhance the treatment and
recycling process, some systems are equipped with chemical
monitoring and injection systems for introducing coagulants and
other chemicals. This reduces oil and grease in the blowdown
from these systems.
(3) Most of the water recycled through the unit
is used over and over again, reducing the cost of fresh water
required and producing less wastewater that needs to be conveyed
for treatment to a separate facility.
(4) Wash water reuse conserves fresh cleaning
solution because the majority of the cleaning solution is
recycled with the wastewater. This recycling cuts costs.
(5) The costs associated with permit application
fees, annual permit renewal fees, and associated sampling are
avoided.
(6) The system reduces the risk of contaminating
the environment because there is little or no discharge with this
system.
b) Some disadvantages of these systems that should be
considered when evaluating their use include the following:
(1) Recycling units require routine maintenance
to ensure proper operating efficiency.
(2) Although recycling units greatly reduce the
quantity of waste effluent, they usually do not eliminate it.
These systems often produce a more concentrated waste that may
require special management and disposal requirements. The
operator of the unit will need to characterize this waste sludge
stream to see if it is hazardous. In addition, some units
routinely blow down a small fraction of the process water to the
sewer which is then made up with fresh water.
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