PROCESSING OF RAW SEWAGE BY ULTRA-FILTRATION

To meet discharge regulations for marine sanitation devices, the Navy has examined various state-of-the-art processes. One of the newer technologies is ultrafiltration, a pressure-driven membrane process. A microfiltration and nine ultrafiltration systems were evaluated for their effectiveness in processing raw sewage while producing an effluent that could meet the discharge requirements. Four filtration configurations--tubular, hollow fiber, spiral wound, and plate and frame -- were tested. Pretreatment and cleaning requirements for each system were established. Each system was compared in terms of relative flux decline, maintenance, rejection of fecal coliform, and suspended solids. All systems produced an effluent, meeting the Jan 1980 effluent standard requirement for suspended solids content; and all but two met the requirement for fecal coliform bacteria density. It was recommended that further tests be conducted with a noncellulosic 1-inch inside diameter tubular membrane and a hollow fiber membrane system, coupled to a biological oxidation process and compared with a previously-evaluated plate and frame membrane design.

• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Materials Department
  Annapolis, MD  United States  21402
• Authors:
  • HARRIS, L R
  • Adema, C M
• Publication Date: 1977-4

Media Info

• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Chemical processes; Concentration (Chemistry); Container tanks; Effluents; Fibers; Filtration; Maintainability; Military vessels; Osmosis; Polymers; Pressure; Sewage treatment; Sewerage; Ships; Standards; Testing; Tubular structures
• Uncontrolled Terms: Membranes; Reverse osmosis; Ultrafiltration
• Old TRIS Terms: Coliform bacteria; Feces; Low pressure; Membrane filters; Membranes (Biology); Sewage effluent testing; Sewage treatment systems; Shipboard sewage treatment; Shipboard sewage treatment systems; Ultrafiltration systems
• Subject Areas: Environment; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00166103
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: MAT-77-79 R&D Rpt.
• Files: TRIS
• Created Date: Sep 20 1977 12:00AM