MIL-HDBK-1005/16
on package plant systems. (See also Field and Laboratory Studies
of Onsite Household Wastewater Treatment Alternatives, Hutzler
et al., 1984; and Biological Wastewater Treatment: Theory and
Applications, Grady and Lim, 1985.)
6.2
Package Plant Systems. These systems combine processes
such as aeration, settling, and solids treatment in a single
multicompartment tank. Potential savings result from design
standardization and factory production.
6.2.1
Types of Treatment Processes. Refer to Table 8 for
classification according to the biological process employed and
other characteristics. Select the treatment type according to
the biological process. Note that some treatment types require
separate primary settling. See Figure 14 for a typical treatment
plant layout and a flow diagram incorporating a secondary
treatment activated sludge package unit.
6.2.2
Evaluation of Particular Packages. For most treatment
types, competitive packages are available from different
manufacturers. Evaluate proprietary features and performance by
cross-checking with manufacturers and with operators at an actual
installation. Use package plants certified by the National
Sanitation Foundation. Refer to NCEL CR-70.11, Analysis of
Wastewater Treatment and Disposal Systems for Advanced Bases.
6.2.3
Performance Certification. Specify requirements based
on the evaluation described above. Specify the method of
operation and performance testing and indicate the penalties for
failure to comply, including conditions requiring removal or
replacement.
6.2.4
Capacity Ranges. Typical population equivalents for
various biological processes available from vendors or as package
units are shown in Table 8. These systems, depending on their
size, may be supplied either as skid-mounted assemblies, or as
field assembled units from package parts supplied by a
manufacturer. Table 8 also includes information about process
types, as well as a description of units, disposal
recommendations, aeration methods, and applications.
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