scholarly journals Growth yields and saturation constant of Desulfovibrio vulgaris in chemostat culture

1984 ◽  
Vol 137 (3) ◽  
pp. 236-240 ◽  
Author(s):  
Regina Nethe-Jaenchen ◽  
Rudolf K. Thauer
Keyword(s):  
Chemostat Culture ◽  
Growth Yields ◽  
Desulfovibrio Vulgaris

Respiratory activity, molar growth yields, and ATP content in an Arthrobacter sp. ammonium-limited chemostat culture

1983 ◽  
Vol 29 (9) ◽  
pp. 1136-1140 ◽  
Author(s):  
I. Cacciari ◽  
D. Lippi ◽  
S. Ippoliti ◽  
W. Pietrosanti
Keyword(s):  
Respiratory Activity ◽  
Chemostat Culture ◽  
Morphological Changes ◽  
Sharp Decrease ◽  
Growth Yields ◽  
Atp Content ◽  
Lower Growth ◽  
Wide Range ◽  
Metabolic Activities

Arthrobacter fluorescens was grown in chemostat culture under ammonium-limited conditions and respiratory activity; molar growth yields and ATP content were determined over a wide range of dilution rates. Within a range of dilution rates between 0.10 h−1 and 0.20 h−1, morphological transition occurred, the ratio of cocci to rods appearing inversely related to growth rate. Molar growth yields for both glucose and ammonium decreased with increasing dilution rates because of the higher intracellular polysaccharide content at the lower growth rates. Different metabolic activities were shown in cocci, in rods, and during morphogenesis. A sharp decrease in in situ and potential oxygen quotient (Q(O2)) and in ATP content was observed in the range of dilution rates in which morphological changes occurred.

Growth yields of Desulfotomaculum orientis with hydrogen in chemostat culture

1986 ◽  
Vol 143 (4) ◽  
pp. 396-399 ◽  
Author(s):  
Heribert Cypionka ◽  
Norbert Pfennig
Keyword(s):  
Chemostat Culture ◽  
Growth Yields

Unravelling a microbial synergy to boost caproate production via carboxylates chain elongation with ethanol

2019 ◽  
Vol 26 (2) ◽  
pp. 63-71
Author(s):  
Ling Leng ◽  
Ying Wang ◽  
Peixian Yang ◽  
Takashi Narihiro ◽  
Masaru Konishi Nobu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Microbial Consortia ◽  
Chain Elongation ◽  
Desulfovibrio Vulgaris ◽  
Rrna Gene ◽  
Selective Enrichment ◽  
Microbial Network ◽  
Cost Efficient ◽  
Rrna Gene Sequencing

Chain elongation of volatile fatty acids for medium chain fatty acids production (e.g. caproate) is an attractive approach to treat wastewater anaerobically and recover resource simultaneously. Undefined microbial consortia can be tailored to achieve chain elongation process with selective enrichment from anaerobic digestion sludge, which has advantages over pure culture approach for cost-efficient application. Whilst the metabolic pathway of the dominant caproate producer, Clostridium kluyveri, has been annotated, the role of other coexisting abundant microbiomes remained unclear. To this end, an ethanol-acetate fermentation inoculated with fresh digestion sludge at optimal conditions was conducted. Also, physiological study, thermodynamics and 16 S rRNA gene sequencing to elucidate the biological process by linking the system performance and dominant microbiomes were integrated. Results revealed a possible synergistic network in which C. kluyveri and three co-dominant species, Desulfovibrio vulgaris, Fusobacterium varium and Acetoanaerobium sticklandii coexisted. D. vulgaris and A. sticklandii (F. varium) were likely to boost the carboxylates chain elongation by stimulating ethanol oxidation and butyrate production through a syntrophic partnership with hydrogen (H2) serving as an electron messenger. This study unveils a synergistic microbial network to boost caproate production in mixed culture carboxylates chain elongation.

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