A water-reuse concept for flushing toilets was developed, and this concept was evaluated by using a bench-scale model. Two recycling systems for flushing fluids, namely, the water recycling system and the mineral oil system are described. A recycling system that is now in operation in Virginia can be added directly to rest areas that are already equipped with extended aeration biological treatment. Approximately 90 to 95 percent of the water at use at rest areas is for flushing toilets, and extended aeration followed by sand filtration produces a water of sufficient quality for this purpose. The conceptual flow scheme (illustrated in a figure) is based on the known performance of the extended-aeration system with high dissolved solids and the acceptability of applying settled extended-aeration effluent to sand-filler. The bench-scale system used to study the recycle and use of wastewater included extended aeration followed by sedimentation and sand filtration. The sand filtration and recycling would be the only modifications necessary for the conversion of a conventional extended-aeration system to a water recylce-and-reuse system. Water from water fountains and lavatories can provide the 5 to 10 percent of additional water necessary to ensure a steady state dissolved-solids composition in the water. The treatment described here is applicable to areas with dificient water supplies, and to areas where there are water disposal problems.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 37-39
  • Monograph Title: Geometrics, water treatment, utility practices, safety appurtenances, and outdoor advertisement
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00172414
  • Record Type: Publication
  • ISBN: 0309026563
  • Files: TRIS, TRB
  • Created Date: Apr 12 1978 12:00AM