Premium
Effect of hydrogen and carbon dioxide partial pressures on growth and sulfide production of the extremely thermophilic archaebacterium Pyrodictium brockii
Author(s) -
Parameswaran A. K.,
Schicho R. N.,
Soisson J. P.,
Kelly R. M.
Publication year - 1988
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260320405
Subject(s) - partial pressure , carbon dioxide , hydrogen sulfide , hydrogen , chemistry , substrate (aquarium) , yield (engineering) , sulfide , carbon fibers , carbon monoxide , hydrogen production , inorganic chemistry , chemical engineering , organic chemistry , materials science , sulfur , catalysis , oxygen , metallurgy , ecology , biology , composite number , engineering , composite material
The effect of hydrogen and carbon dioxide partial pressure on the growth of the extremely thermophilic archaebacterium Pyrodictium brockii at 98°C was investigated. Previous work with this bacterium has been done using an 80:20 hydrogen‐carbon dioxide gas phase with a total pressure of 4 atm; no attempt has been made to determine if this mixture is optimal. It was found in this study that reduced hydrogen partial pressures affected cell yield, growth rate, and sulfide production. The effect of hydrogen partial pressure on cell yield and growth rate was less dramatic when compared to the effect on sulfide production, which was not found to be growth‐associated. Carbon dioxide was also found to affect growth but only at very low partial pressures. The relationship between growth rate and substrate concentration could be correlated with a Monod‐type expression for either carbon dioxide or hydrogen as the limiting substrate. The results from this study indicate that a balance must be struck between cell yields and sulfide production in choosing an optimal hydrogen partial pressure for the growth of P. brockii .