MIL-HDBK-1005/9A
2.4.3.4
Radioactive Wastes. Wastes that have radioactivity
are not covered in this handbook.
2.4.4
Flow and Load Equalization. Certain processes have
short duration, and high flow and loading rates that can
adversely impact the collection and treatment systems. At-the-
source equalization tanks may be advantageous to minimize these
hydraulic and pollutant load surges. Equalization should be
evaluated on a large scale for compatible wastes received at a
treatment facility, or on a smaller scale for specific process
line-waste discharges.
2.4.4.1
Basin Sizing. Equalization basin volume may be
controlled by either flow variations or load variations of the
influent. The method of sizing should be selected based on the
equalization objective (flow or load).
a) Flow Equalization. If curve of inflow rate
variations is available, apply mass diagram technique to
determine required storage volume for desired outflow rate. In
absence of flow rate curve, determine required storage volume by
statistical methods and as outlined in Statistical Design of
Equalization Basins, the American Society of Civil Engineers
(ASCE) Journal of the Environmental Engineering Division.
b) Load Equalization. Determine the effect of
required volume for flow equalization of pollutant loads. Use
the method presented in Water and Sewage Works Journal,
Developing a Methodology for Design of Equalization Basins,
Ouano, 1977. If adequate power is not provided for complete
mixing in the basin, size the basin on non-ideal flow pattern
described by Ouano (1977). Consider the effects of variable and
constant volume basin on equalization performance.
2.4.4.2
Basin Construction. Use steel or concrete tanks with
suitable liners to prevent ground water contamination. Earth
embankment lagoons are not allowed unless permitted by Resource
Conservation and Recovery Act (RCRA). Provide protective liner
compatible with wastewater characteristics. Consider frequency
of basin use and solids deposition and clean-out when evaluating
the need for liners.
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