MIL-HDBK-1165
irrigation, where potable-grade water is not required and the
treatment requirements are less demanding. Figure 21 shows a
design for a graywater distribution system for irrigation use.
Blackwater obviously requires much more extensive treatment and
may involve a number of processes. The cost of implementing such
a system on-base can reach hundreds of thousands of dollars.
Also, there are regulations regarding the performance of both
these systems that must be followed to ensure that public health
is not endangered. If you are considering this type of
conservation measure, make sure you work closely with your base
environmental personnel as well as the local water districts.
(Also refer to par. 5.6.5.)
6.2.2
Retrofits. For established facilities with plumbing
already in place, implementing an on-site wastewater treatment
system will necessitate obtaining access to drain pipes and sewer
lines and could involve extensive effort.
When considering if a wastewater treatment and
reclamation system may be appropriate for your facility, it will
be helpful to answer or consider the following:
a)
How much wastewater does our facility generate?
b) Which buildings do we want to consider for
wastewater recycling?
c)
What will the water be recycled to?
d)
How much of it do we want to recycle?
e)
How extensive a treatment system do we need and
want?
f)
Where will the system be built?
g) What are the implementation costs? Should we lease
or buy the system? (Consult with a number of vendors and
manufacturers to find out what technologies are available).
h)
What will be the operational and maintenance costs?
i) Will the ultimate savings from reduced water
consumption and discharge costs outweigh the cost of the system?
j)
What is the payback period?
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