scholarly journals Continuous production of acetone and butanol by Clostridium acetobutylicum in a two-stage phosphate limited chemostat

1983 ◽  
Vol 17 (1) ◽  
pp. 73-73 ◽  
Author(s):  
Hubert Bahl ◽  
Wolfram Andersch ◽  
Gerhard Gotschalk
Keyword(s):  
Clostridium Acetobutylicum ◽  
Continuous Production ◽  
Two Stage

Two stage biodiesel and hydrogen production from molasses by oleaginous fungi and Clostridium acetobutylicum ATCC 824

2014 ◽  
Vol 39 (7) ◽  
pp. 3185-3197 ◽  
Author(s):  
Magdy Mohamed Khalil Bagy ◽  
Mohamed Hemida Abd-Alla ◽  
Fatthy Mohamed Morsy ◽  
Elhagag Ahmed Hassan
Keyword(s):  
Hydrogen Production ◽  
Clostridium Acetobutylicum ◽  
Two Stage ◽  
Oleaginous Fungi ◽  
Clostridium Acetobutylicum Atcc 824

scholarly journals Continuous production of biohythane from hydrothermal liquefied cornstalk biomass via two-stage high-rate anaerobic reactors

2016 ◽  
Vol 9 (1) ◽  
Author(s):  
Bu-Chun Si ◽  
Jia-Ming Li ◽  
Zhang-Bing Zhu ◽  
Yuan-Hui Zhang ◽  
Jian-Wen Lu ◽  
...  
Keyword(s):  
Continuous Production ◽  
High Rate ◽  
Two Stage ◽  
Anaerobic Reactors

Enhanced bio-energy recovery in a two-stage hydrogen/methane fermentation process

2009 ◽  
Vol 59 (11) ◽  
pp. 2137-2143 ◽  
Author(s):  
M. J. Lee ◽  
J. H. Song ◽  
S. J. Hwang
Keyword(s):  
Hydrogen Production ◽  
Fermentation Process ◽  
Continuous Production ◽  
Strong Acid ◽  
Treatment Method ◽  
Engineering System ◽  
Production Rates ◽  
Two Stage ◽  
Methane Fermentation ◽  
Pre Treatment

A two-stage hydrogen/methane fermentation process has emerged as a feasible engineering system to recover bio-energy from wastewater. Hydrogen-producing bacteria (HPB) generate hydrogen from readily available carbohydrates, and organic acids produced during the hydrogen fermentation step can be degraded to generate methane in the following step. Three strong acids, HCl, H2SO4, and HNO3, were tested to determine the appropriate pre-treatment method for enhanced hydrogen production. The hydrogen production rates of 230, 290, and 20 L/kg-glucose/day was observed for the sludge treated with HCl, H2SO4, and HNO3, respectively, indicating that the acid pre-treatment using either HCl or H2SO4 resulted in a significant increase in hydrogen production. The fluorescent in situ hybridization method indicated that the acid pre-treatment selectively enriched HPB including Clostridium sp. of cluster I from inoculum sludge. After hydrogen fermentation was terminated, the sludge was introduced to a methane fermentation reactor. This experiment showed methane production rates of 100, 30, and 13 L/kg-glucose/day for the sludge pre-treated with HCl, H2SO4, and HNO3, respectively, implying that both sulfate and nitrate inhibited the activity of methane-producing bacteria. Consequently, the acid pre-treatment might be a feasible option to enhance biogas recovery in the two-stage fermentation process, and HCl was selected as the optimal strong acid for the enrichment of HPB and the continuous production of methane.

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