Effect of carbon monoxide, hydrogen and sulfate on thermophilic (55°C) hydrogenogenic carbon monoxide conversion in two anaerobic bioreactor sludges

• Published in: Applied microbiology and biotechnology 2004-04, Vol.64 (3), p.421-428
• Main Authors: Sipma, J, Meulepas, R.J.W, Parshina, S.N, Stams, A.J.M, Lettinga, G, Lens, P.N.L
• Format: Article
• Language: English
• Subjects: Acetates - metabolism; afvalwaterbehandeling; Alkanesulfonic Acids - pharmacology; anaerobic treatment; Anaerobiosis; anaërobe behandeling; bioenergy; biohydrogen; bioreactoren; Bioreactors; Carbon Dioxide - metabolism; Carbon monoxide; Carbon Monoxide - metabolism; co2; energy; energy resources; environmental degradation; growth; Growth Inhibitors - pharmacology; Hot Temperature; Hydrogen; Hydrogen - analysis; Hydrogen - metabolism; Hydrogen production; Industrial Microbiology; koolmonoxide; metabolism; Methane - metabolism; methanogenic bacteria; natural resources; oxidation; Oxidation-Reduction; Paper industry wastes; pollution; Pulp & paper industry; Pulp & paper mills; reactor; reduction; Sewage - microbiology; slib; Sludge; sludges; Sulfate reduction; Sulfates; Sulfates - metabolism; Synthesis gas; Vancomycin - pharmacology; waste management; waste water treatment
• ISSN: 0175-7598; 1432-0614
• DOI: 10.1007/s00253-003-1430-4

The conversion routes of carbon monoxide (CO) at 55°C by full-scale grown anaerobic sludges treating paper mill and distillery wastewater were elucidated. Inhibition experiments with 2-bromoethanesulfonate (BES) and vancomycin showed that CO conversion was performed by a hydrogenogenic population and that its products, i.e. hydrogen and CO2, were subsequently used by methanogens, homo-acetogens or sulfate reducers depending on the sludge source and inhibitors supplied. Direct methanogenic CO conversion occurred only at low CO concentrations [partial pressure of CO (PCO)