Interactions between respiration and denitrification during growth of Thiosphaera pantotropha in continuous culture

Jens Kirk Thomsen, J. J. Lansmann Iversen, Raymond P. Cox*

*Kontaktforfatter for dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstrakt

The effects of oxygen on the use of nitrate as an electron acceptor by the denitrifying bacterium Thiosphaera pantotropha were investigated during growth on acetate. In batch cultures under aerobic conditions nitrate was not utilised and the growth rate constant was 0.55 h-1. The corresponding value for growth on nitrate under anoxic conditions was 0.37 h-1. In acetate-limited continuous cultures with feedback control of the dissolved oxygen concentration, nitrate utilisation was totally inhibited by the lowest concentration of oxygen tested (22 μM). Carbon conversion efficiencies with acetate increased from 0.28 with nitrate to 0.44 with oxygen. The rates of nitrification calculated from nitrogen balance studies were not greater than 1.5% of the rate of anoxic denitrification.

OriginalsprogEngelsk
TidsskriftFEMS Microbiology Letters
Vol/bind110
Udgave nummer3
Sider (fra-til)319-323
ISSN0378-1097
DOI
StatusUdgivet - 1. jul. 1993

Fingeraftryk Dyk ned i forskningsemnerne om 'Interactions between respiration and denitrification during growth of Thiosphaera pantotropha in continuous culture'. Sammen danner de et unikt fingeraftryk.

Citationsformater