title: Effect of hydrogen sulfide on growth of sulfate reducing bacteria.
abstract: A culture of sulfate reducing bacteria (SRB) growing on lactate and sulfate was incubated at different pH values in the range of 5.8-7.0. The effect of pH on growth rate was determined in this pH range; the highest growth rate was observed at pH 6.7. Hydrogen sulfide produced from sulfate reduction was found to have a direct and reversible toxicity effect on the SRB. A hydrogen sulfide Concentration of 547 mg/L (16.1 mM) completely inhibited the culture growth. Comparison between acetic acid and hydrogen sulfide inhibition is presented and the concomitant inhibition kinetics are mathematically described.
authors.affiliation: Lab. de Engenharia Bioquímica, Faculdade de Ciências e Tecnologia/UNL, 2825 Monte da Caparica, Portugal.
authors.forename: M A
authors.initials: MA
authors.lastname: Reis
authors.forename: J S
authors.initials: JS
authors.lastname: Almeida
authors.forename: P C
authors.initials: PC
authors.lastname: Lemos
authors.forename: M J
authors.initials: MJ
authors.lastname: Carrondo