MIL-HDBK-1003/7
Discharge Standards. Newly constructed plants may be designed as zero
17.2.2
discharge facilities. Zero discharge means that although a plant may use water, it does
not have a discharge of water. Hence, for this case, discharge standards do not apply.
Many facilities do discharge water from the sewage treatment plant, the cooling water
system, or from storm water runoff. If there is any water discharge, discharge
standards apply. Environmental regulations and permitting associated with wastewater
discharge are discussed in Section 18, Environmental Regulations and Permitting.
Treatment and Disposal Methods. Wastewaters generated by a power plant should
17.2.3
be reused as much as practical to conserve water.
17.2.3.1 Recycle Basin. A common method of wastewater handling at a power plant
involves the use of a recycle basin (also called a reclaim pond). The wastewater
streams, properly treated, flow to the recycle basin.
17.2.3.2 Chemical Wastewater. Wastes from steam condensate treatment, chemical feed
and storage area drains, laboratory drains, and metal cleaning wastewater are corrosive
and should be collected in a separate piping system from other plant drains. These
wastes are normally directed to a treatment tank where they are mixed with the proper
chemicals until the entire solution is no longer corrosive (i.e., neutralized). The
neutralized wastewater can then be discharged to the recycle basin or to the sanitary
sewer.
17.2.3.3 Sanitary Wastewater. Sanitary wastewater is typically directed to a sewage
treatment plant located on site. The treatment plant processes the sanitary wastes and
discharges either to the streams or to the recycle basin.
17.2.3.4 Storm Water Runoff. Roof and yard drain storm water runoff is reasonably
clean and discharged with the storm system without treatment.
17.2.3.5 Leachate and Runoff From Coal Storage Areas. Discharge waters from coal
storage areas and solid waste storage require treatment, which includes settlement,
clarification, and neutralization, to satisfy local regulations for wastewater discharge
of storm water.
17.2.3.6 Oily Wastewater. Oil-contaminated wastewater must be treated before being
allowed to enter a recycle basin. This treatment is normally accomplished through use
of an oil separator. This device operates by allowing the oil and wastewater to
separate naturally (because of their difference in densities). The separated oil is
directed to waste oil storage containers while the de-oiled wastewater is discharged to
the recycle basin.
17.3
Oil Spill Control
17.3.1
Possible Sources of Spills
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