Effect of temperature on continuous fermentative hydrogen production from Laminaria japonica by anaerobic mixed cultures

2013 ◽  
Vol 144 ◽  
pp. 225-231 ◽  
Author(s):  
Xueqing Shi ◽  
Dong-Hoon Kim ◽  
Hang-Sik Shin ◽  
Kyung-Won Jung
Keyword(s):  
Hydrogen Production ◽  
Laminaria Japonica ◽  
Mixed Cultures ◽  
Effect Of Temperature ◽  
Fermentative Hydrogen Production ◽  
Fermentative Hydrogen

scholarly journals Bioaugmentation enhances dark fermentative hydrogen production in cultures exposed to short-term temperature fluctuations

2019 ◽  
Vol 104 (1) ◽  
pp. 439-449
Author(s):  
Onyinye Okonkwo ◽  
Renaud Escudie ◽  
Nicolas Bernet ◽  
Rahul Mangayil ◽  
Aino-Maija Lakaniemi ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Mixed Culture ◽  
Temperature Fluctuation ◽  
Temperature Fluctuations ◽  
Mixed Cultures ◽  
Short Term ◽  
Fermentative Hydrogen Production ◽  
Fermentative Hydrogen ◽  
The Impact

AbstractHydrogen-producing mixed cultures were subjected to a 48-h downward or upward temperature fluctuation from 55 to 35 or 75 °C. Hydrogen production was monitored during the fluctuations and for three consecutive batch cultivations at 55 °C to evaluate the impact of temperature fluctuations and bioaugmentation with synthetic mixed culture of known H2 producers either during or after the fluctuation. Without augmentation, H2 production was significantly reduced during the downward temperature fluctuation and no H2 was produced during the upward fluctuation. H2 production improved significantly during temperature fluctuation when bioaugmentation was applied to cultures exposed to downward or upward temperatures. However, when bioaugmentation was applied after the fluctuation, i.e., when the cultures were returned to 55 °C, the H2 yields obtained were between 1.6 and 5% higher than when bioaugmentation was applied during the fluctuation. Thus, the results indicate the usefulness of bioaugmentation in process recovery, especially if bioaugmentation time is optimised.

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