As soon as the pH of the concrete falls from its initial levels of 11-12 to around 9, biological colonization of aerobic (air breathing) Thiobacillus
bacteria will begin.
Numerous bacterial genera have been identified which are able to reduce ferric iron, such as Pseudomonas, Bacillus, Bacteroides, Desulfovibrio, Sulfolobus, Thiobacillus
, Shewanella, Desulfomonas, Desulforomusa, Geobacter, and Pelobacter.
Pyrites reacting with oxygen and water will form Thiobacillus
bacteria which generate their energy through oxidizing the iron with a side effect of producing sulfuric acid and that chemically corrodes the iron pipe.
When the city of Huntington Beach, CA, officials investigated reports of sewage odors, they discovered that a storm drain was infiltrating ground water heavily laden with hydrogen sulfide gas, fostering colonies of Thiobacillus
bacteria that consume the gas and excrete sulfuric acid.
In the past few years, bioleaching technology using especially Thiobacillus
Torrento C, Cama J, Urmeneta J, Otero N, Soler A (2010) Denitrification of groundwater with pyrite and Thiobacillus
in this particular case, sulfur dioxide during an active division of Thiobacillus
Estudos da biolixiviacao de minerios de uranio por Thiobacillus
Although unconfirmed in the present study, it seems reasonable that some iron may be locally reduced by bacteria such as Thiobacillus
or Shewenella (Glasauer et al.
Optimal production of sulphuric acid by Thiobacillus
thiooxidans using response surface methodology.
These compounds are easily degraded by microorganisms or absorbed by clay, so that regular doses are needed to maintain low activity of Thiobacillus
As the soil was moistened in presence of carbamate-pesticides the enhanced effect of actinomycetes, ascomycetes and reinfested fungus flora Aspergillus niger, Rhizobium thiobacillus