On-Site Wastewater Treatment and Disposal Systems - Forced ...

Residuals resulting from the treatment or holding of segregated waste
streams must be considered when evaluating these alternatives. Details
of the characterization and disposal of these residuals appear in
Chapter 9.
6.7.2 Wastewater Recycle
In-house wastewater recycle systems are treatment systems employed to
remove specific pollutants from one or more wastewater streams in order
to meet a specific water use objective (for example, graywater may be
treated to a quality that is acceptable for flushing toilets, watering
lawns, etc.). These systems are summarized in Table 5-6.
The impact of recycle systems on the quality of wastewater to be ulti-
mately disposed is difficult to assess at this time owing to the absense
of long term experience with these systems. It is likely that substan-
tial pollutant mass reduction will occur in addition to flow reduction.
As with segregated systems, the disposal of residuals from these pro-
cesses must be considered in system evaluation.
6.8
1.
2.
3.
4.
5.
6.
References
Jones, E. E. Septic Tank - Configuration versus Performance. Pre-
sented at the 2nd Pacific Northwest On-Site Wastewater Disposal
Short Course, University of Washington, Seattle, March 1978.
Small Scale Waste Management Project, University of Wisconsin,
Madison. Management of Small Waste Flows. EPA 600/Z-78-173, NTIS
Report No. PB 286 560, September 1978. 804 pp.
Weibel, S. R., C. P. Straub, and J. R. Thoman. Studies on House-
hold Sewage Disposal Systems, Part I. NTIS Report No. PB 217 671,
Environmental Health Center, Cincinnati, Ohio, 1949. 279 pp.
Salvato, J. A. Experience with Subsurface Sand Filters. Sewage
and Industrial Wastes, 27(8):909, 1955.
Bernhart, A. P. Wastewater from Homes. University of Toronto,
Toronto, Canada, 1967.
Laak, R. Wastewater Disposal Systems in Unsewered Areas. Final
Report to Connecticut Research Commission, Civil Engineering
Department, University of Connecticut, Storrs, 1973.
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