Effect of the organic loading rate on biogas composition in continuous fermentative hydrogen production

2010 ◽  
Vol 45 (12) ◽  
pp. 1475-1481 ◽  
Author(s):  
Alessandro Spagni ◽  
Stefania Casu ◽  
Roberto Farina
Keyword(s):  
Hydrogen Production ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Fermentative Hydrogen Production ◽  
Fermentative Hydrogen

Continuous Fermentative Hydrogen Production from Brown Sugar Using EGSB Reactor

2010 ◽  
Vol 113-116 ◽  
pp. 1132-1137 ◽  
Author(s):  
Yong Feng Li ◽  
Yong Ming Hui ◽  
Xin Yao ◽  
Lu Wang ◽  
Qian Wen Song ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Granular Sludge ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Hydrogen Production Rate ◽  
Brown Sugar ◽  
Fermentative Hydrogen Production ◽  
Fermentative Hydrogen

In this experiment, brown sugar was chosen as the substrate of continuous operation. A lab-scale expanded granular sludge blanket (EGSB) reactor was employed. Stable ethanol-type fermentation was formed by controlling the organic loading rate (OLR). The results showed a maximum hydrogen production rate of 5.73L / L reactor•d was achieved, under the condition that the hydraulic retention time (HRT) = 2h, OLR = 97.2kg COD/m3 reactor•d. The average hydrogen content in the biogas during the 73-day operation was 41.27%.

Performance and composition of bacterial communities in anaerobic fluidized bed reactors for hydrogen production: Effects of organic loading rate and alkalinity

2012 ◽  
Vol 37 (22) ◽  
pp. 16925-16934 ◽  
Author(s):  
Géssia Momoe Shida ◽  
Leandro Takano Sader ◽  
Eduardo Lucena Cavalcante de Amorim ◽  
Isabel Kimiko Sakamoto ◽  
Sandra Imaculada Maintinguer ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Fluidized Bed ◽  
Bacterial Communities ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Fluidized Bed Reactors ◽  
Organic Loading ◽  
Production Effects

Study on Bio-Hydrogen Production of Different Fermentation Types

2010 ◽  
Vol 152-153 ◽  
pp. 377-382
Author(s):  
Kun Liu ◽  
An Ying Jiao ◽  
Li Ran Yue ◽  
Yong Feng Li
Keyword(s):  
Hydrogen Production ◽  
Propionic Acid ◽  
Production System ◽  
Loading Rate ◽  
H2 Production ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Production Capability ◽  
Acid Type ◽  
Optimal Type

By the researches and analyses of the fermentation type in the bio-hydrogen production system, ethanol-type fermentation bacteria had the largest H2-production capability, butyric acid type fermentation bacteria took the second place, and propionic acid-type fermentation bacteria had the least H2-poduction capability. When the organic loading rate (OLR) is 24kgCOD/m3•d, HRT is 8h and temperature is 35 °C, the highest hydrogen production capability corresponding were 4.2, 1.3 and 0.018 mol•kg MLVSS−1•d−1, so ethanol-type fermentation was optimal type for hydrogen production.

Effect of Organic Loading Rate on Bio-Hydrogen Production in Continuous Stirred Tank Reactor

2010 ◽  
Vol 113-116 ◽  
pp. 1170-1175
Author(s):  
Zi Rui Guo ◽  
An Ying Jiao ◽  
Xiao Ye Liu ◽  
Yong Feng Li
Keyword(s):  
Hydrogen Production ◽  
Loading Rate ◽  
Clean Energy ◽  
H2 Production ◽  
Organic Loading Rate ◽  
Hydrogen Yield ◽  
Continuous Stirred Tank Reactor ◽  
Organic Loading ◽  
H2 Yield ◽  
Distribution Energy

Hydrogen is a kind of ideal clean energy sources. With low energy consumption, environmental protection and other advantages, biological hydrogen production technology become the hotspot of current study home and abroad. The distribution energy technology for producing hydrogen can get hydrogen when deal with waste water. For finding out the industralized feasibility of continuous H2 bio-production,the ability of H2-production via facultative anaerobe,optimum hydraulic retention time(HRT) and optimum organic loading rate(OLR) were aslo studied. With a temperature of (35±1)°C，HRT of 8 h，the CSTR inoculated with activated sludge ,and the progression is increasing organic loading rate gradually. Six OLRs were examined, ranging from 2 to 12 g COD/L.d, with the mass of molasses ranging from 1.3 to 10 g COD/L. While COD was up to 4g/L(OLR 12kg/(m3•d)), all molasses was utilized and the H2 yield was not significantly influenced by OLR. At the intermediate COD of 6g/l (OLR 18kg/(m3•d)), the H2 yield was maximized at about 30 L/d H2 (mol molasses. Conv.), which was 17.9% and 55.9% higher than those of OLR 6 kg/(m3.d) and OLR 12 kg/(m3.d),respectively. When the influent COD concentration raised to 12g/L(OLR 30kg/(m3•d)), the reactor were overloaded, the hydrogen yield decreased drastically，hydrogen evolution rate decreased to zero. Exceeding OLR would arouse great change of internal environment parameters, such as pH, ALK(aikalinity), ORP(oxidation-reduction potential) in CSTR, and the microbial community structure would change while the metabolism of microorganism was inhibited badly.

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