Aerobic Heterotrophic Bacteria Indigenous to p H 2.8 Acid Mine Water: Predominant Slime-Producing Bacteria in Acid Streamers

Hexavalent chromium reduction by aerobic heterotrophic bacteria indigenous to chromite mine overburden

Microbiological analysis of overburden samples collected from chromite mining areas of Orissa, India revealed that they are rich in microbial density as well as diversity and dominated by Gram-negative (58%) bacteria. The phenotypically distinguishable bacterial isolates (130) showed wide degree of tolerance to chromium (2-8 mM) when tested in peptone yeast extract glucose agar medium. Isolates...

Acidophilic, heterotrophic bacteria of acidic mine waters.

Obligately acidophilic, heterotrophic bacteria were isolated both from enrichment cultures developed with acidic mine water and from natural mine drainage. The bacteria were grouped by the ability to utilize a number of organic acids as sole carbon sources. None of the strains were capable of chemolithotrophic growth on inorganic reduced iron and sulfur compounds. All bacteria were rod shaped, ...

Slime-producing Coliform and Coliform-like Bacteria.

New medium for isolating iron-oxidizing and heterotrophic acidophilic bacteria from acid mine drainage.

A new solid medium is described for growing iron and heterotrophic bacteria from acid mine drainage (AMD). Examination of AMD from five states revealed several kinds of colonies of iron-oxidizing bacteria: (i) smooth, (ii) smooth with secondary growth sectors or branching, (iii) star-shaped, (iv) radiating lobe, and (v) flat-rough. All AMD samples yielded whitish colonies that could not use fer...

Antimicrobial microbes-bacteriocin producing lactic acid bacteria

The contribution of lactic acid bacteria (LAB) to the improvement of food safety and stability of fermented foods has long been known. LAB overgrow other microorganisms of the same ecological niche in food products mainly due to lowering the pH, competing for nutrients, producing various antimicrobial substances such as organic acids, hydrogen peroxide, antibiotics and bacteriocins. Among these...