Purification of semi-synthetic metalworking fluids by microfiltration

Kishore Rajagopalan, Todd Rusk, Michael Dianovsky

Research output: Contribution to specialist publicationArticle


The applicability of microfiltration for achieving simultaneous waste reduction and bacterial control was investigated. Microfiltration productivity and separation performance was determined with an α-alumina membrane of 0.5 μm pore-size and a commercial semi-synthetic microemulsion with and without model contaminants such as hydraulic oil and bacteria. Results indicate that it is possible to obtain excellent separation of extraneous emulsified tramp oil from native semi-synthetic emulsion while maintaining high productivity at low pressure. A 7-log reduction in bacteria is attained along with a 50-95 % reduction in indotoxin.

Original languageEnglish (US)
Number of pages7
Specialist publicationTribology and Lubrication Technology
StatePublished - Aug 2004


  • Hydraulic oil
  • Metalworking fluids
  • Microfiltration

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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