EFFECTS OF BIOLOGICAL TREATMENT CONDITIONS ON PERMEATE FLUX OF UF MEMBRANE IN A MEMBRANE/ACTIVATED-SLUDGE WASTEWATER TREATMENT SYSTEM

A bench-scale membrane/activated-sludge wastewater treatment system was built and operated continuously for more than a year with peptone/glucose as a model waste water. The system was operated successfully with a new type of spiral element containing a corrugated feed spacer, which was developed specially for treating feeds containing high suspended solids. During the operation, biological treatment conditions such as loading rate, sludge retention time and dissolved oxygen level were varied. Effects of these treatment conditions on organic solutes in the sludge and resulting permeate flux of the UF membrane were studied. The permeate flux was in good correlation with the differential Dissolved Organic Carbon (DOC) between membrane feed and permeate. When sufficient dissolved oxygen (DO) was supplied, DOC was produced quantitatively from loaded substrate into the bioreactor. With lower DO level (1-2 mg/1), although the substrate was still completely digested, production of DOC increased. Prediction of permeate flux from biological treatment conditions was also attempted to give a guide line for controlling biological treatment conditions from a point of membrane separation performance.

  • Supplemental Notes:
    • US-Japan Technical Workshop on Shipboard Wastes Treatment Technology; 19-21 Sept 1994; Tokyo, Japan. Sponsored by Ship Res Inst, Japan and Office of Naval Research, USA. Procs. Publ by Ship Res Inst, Japan. Technical session 1, p 2-38 [6 p, 3 ref, 7 fig]
  • Authors:
    • Ishiguro, K
    • Imai, K
    • Sawada, S
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00710642
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM