Enhanced biological treatment of saline wastewater by using halophilic bacteria

Kargi F.

BIOTECHNOLOGY LETTERS, vol.24, no.19, pp.1569-1572, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 19
  • Publication Date: 2002
  • Doi Number: 10.1023/a:1020379421917
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1569-1572
  • Keywords: biological treatment, halophilic bacteria, saline wastewater, WATER
  • Dokuz Eylül University Affiliated: No


Biological treatment of saline wastewater by conventional activated sludge culture usually results in low removal of chemical oxygen demand (COD) because of plasmolysis of the organisms at high salt concentrations. Since salt removal operations by physicochemical processes before biological treatment are costly, a salt-tolerant organism (Halobacter halobium) was used for effective biological treatment of saline wastewater in this study. Halobacter halobium was used in activated sludge culture for COD removal from saline wastewater (1-5% salt) by fed-batch operation of an aeration tank. Inclusion of Halobacter halobium into activated sludge culture improved the rate and extent of COD removals especially with salt above 2% (w/v).