Directed metabolic flow with high butanol yield and selectivity in continuous cultures ofClostridium acetobutylicum

1988 ◽  
Vol 10 (5) ◽  
pp. 313-318 ◽  
Author(s):  
Govind Rao ◽  
R. Mutharasan
Keyword(s):  
Continuous Cultures ◽  
Butanol Yield ◽  
Ofclostridium Acetobutylicum

Anaerobic Semi-Continuous Culture Biodegradation of Dichlorophenols Containing an Ortho Chlorine

1987 ◽  
Vol 22 (3) ◽  
pp. 427-436 ◽  
Author(s):  
S.E. Hrudey ◽  
E. Knettig ◽  
P.M. Fedorak ◽  
S.A. Daignault
Keyword(s):  
Activated Carbon ◽  
Continuous Culture ◽  
Chlorine Atom ◽  
Degradation Process ◽  
Anaerobic Sludge ◽  
Continuous Cultures ◽  
Complete Mineralization

Abstract Rapid and preferential dechlorination of the ortho chlorine from 2,6-, 2,4- and 2,3- dichlorophenol substrates was observed in semi-continuous cultures inoculated with 50% unacclimated anaerobic sludge. The rate of further dechlorination depended on the position of the second chlorine atom. The dechlorination rates for the second chlorine ranked ortho > para > meta. Complete mineralization to methane was only observed in cultures fed 2,6-dichlorophenol. Addition of activated carbon to the anaerobic cultures showed some benefit to the degradation process.

scholarly journals Growth and biochemical composition of Chlorella vulgaris in different growth media

2013 ◽  
Vol 85 (4) ◽  
pp. 1427-1438 ◽  
Author(s):  
MATHIAS A. CHIA ◽  
ANA T. LOMBARDI ◽  
MARIA DA GRACA G. MELAO
Keyword(s):  
Biomass Production ◽  
Chlorella Vulgaris ◽  
Biochemical Composition ◽  
Physiological Response ◽  
Low Cost ◽  
Cost Effective ◽  
Growth Conditions ◽  
Growth Media ◽  
Continuous Cultures ◽  
The Cost

The need for clean and low-cost algae production demands for investigations on algal physiological response under different growth conditions. In this research, we investigated the growth, biomass production and biochemical composition of Chlorella vulgaris using semi-continuous cultures employing three growth media (LC Oligo, Chu 10 and WC media). The highest cell density was obtained in LC Oligo, while the lowest in Chu medium. Chlorophyll a, carbohydrate and protein concentrations and yield were highest in Chu and LC Oligo media. Lipid class analysis showed that hydrocarbons (HC), sterol esthers (SE), free fatty acids (FFA), aliphatic alcohols (ALC), acetone mobile polar lipids (AMPL) and phospholipids (PL) concentrations and yields were highest in the Chu medium. Triglyceride (TAG) and sterol (ST) concentrations were highest in the LC Oligo medium. The results suggested that for cost effective cultivation, LC Oligo medium is the best choice among those studied, as it saved the cost of buying vitamins and EDTA associated with the other growth media, while at the same time resulted in the best growth performance and biomass production.

Carbon catabolism in continuous cultures and bacteroids of Rhizobium leguminosarum MNF 3841

1989 ◽  
Vol 152 (6) ◽  
pp. 606-610 ◽  
Author(s):  
I. A. McKay ◽  
M. J. Dilworth ◽  
A. R. Glenn
Keyword(s):  
Rhizobium Leguminosarum ◽  
Continuous Cultures
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