Simultaneous effects of pH and substrate concentration on hydrogen production by acidogenic fermentation / Efectos simultáneos del pH y la concentración de sustrato en la producción de hidrógeno mediante fermentación acidogénica
Electron. j. biotechnol
; 13(1): 11-12, Jan. 2010. ilus, tab
Article
in English
| LILACS
| ID: lil-559594
Responsible library:
CL1.1
ABSTRACT
The present research examined the effects of initial substrate concentration and pH on the yield and productivity of hydrogen production by acidogenic fermentation. Assays were carried out at three different initial pH levels (5.5, 6.5 and 7.5) and three initial substrate concentrations (3, 5 and 10 g COD/L). Glucose was used as carbon source and the experiments were conducted at 37°C in batch tests, after a thermal pretreatment to eliminate methanogenic microorganisms. Conversions of glucose into hydrogen were between 16.75 and 27.25 percent of theoretical maximum, and high values of hydrogen productivity were obtained. An optimum value for the yield of glucose between initial pH of 6.3 and 3.7 g COD/L and productivity of the 5.95 H2/gVSS h and initial pH of 6.7 and 10 g COD/L were obtained from the response surface.
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Glucose
/
Hydrogen
/
Hydrogen-Ion Concentration
Language:
English
Journal:
Electron. j. biotechnol
Journal subject:
Biotechnology
Year:
2010
Document type:
Article
/
Project document
Affiliation country:
Chile
/
United kingdom
Institution/Affiliation country:
Pontificia Universidad Católica de Valparaíso/CL
/
Universidad de La Frontera/CL
/
University of Glamorgan/GB