Enhancement of Biohydrogen Production by Two-Stage Systems: Dark and Photofermentation

2012 ◽  
pp. 313-340 ◽  
Author(s):  
Tugba Keskin ◽  
Patrick C. Hallenbeck
Keyword(s):  
Biohydrogen Production ◽  
Two Stage

Two-Stage Alkaline–Enzymatic Pretreatments To Enhance Biohydrogen Production from Sunflower Stalks

2013 ◽  
Vol 47 (21) ◽  
pp. 12591-12599 ◽  
Author(s):  
Florian Monlau ◽  
Eric Trably ◽  
Abdellatif Barakat ◽  
Jérôme Hamelin ◽  
Jean-Philippe Steyer ◽  
...  
Keyword(s):  
Biohydrogen Production ◽  
Two Stage ◽  
Sunflower Stalks

Biohydrogen production using sequential two-stage dark and photo fermentation processes

2008 ◽  
Vol 33 (18) ◽  
pp. 4755-4762 ◽  
Author(s):  
Chun-Yen Chen ◽  
Mu-Hoe Yang ◽  
Kuei-Ling Yeh ◽  
Chien-Hung Liu ◽  
Jo-Shu Chang
Keyword(s):  
Biohydrogen Production ◽  
Two Stage ◽  
Fermentation Processes

scholarly journals Purification of biohydrogen from fermentation gas mixture using two-stage chemical absorption

2019 ◽  
Vol 90 ◽  
pp. 01012 ◽  
Author(s):  
Abdul Mum Nor Azira ◽  
Asli Umi Aisah
Keyword(s):  
Experimental Study ◽  
Hydrogen Gas ◽  
Wire Mesh ◽  
Biohydrogen Production ◽  
Future Application ◽  
Gas Mixture ◽  
Co2 Removal ◽  
Chemical Absorption ◽  
Two Stage ◽  
Second Stage

Research on biohydrogen production via fermentation process has shown a tremendous progress for the past few years. As biohydrogen production is being established, the purification of biohydrogen should consider the process flow for future application. This paper presents an experimental study of biohydrogen purification using two-stage chemical absorption. The research work focuses on carbon dioxide (CO2) removal, which is a major unwanted fermentation gas product via activated methyldiethanolamine (MDEA) and caustic (NaOH) in two-stage chemical absorption. The experiment was conducted at low pressure of 1 bar and normal room temperature of 29 °C using a ratio of 1:1 of CO2:H2 standard gas mixture as the feed. In the first stage, 40 wt. % MDEA was activated by using piperazine (PZ) with the concentration between 2 and 10 wt. %, whereas 20 wt. % NaOH was used in the second stage. It was found that 6 wt. % of PZ was required to fully activate 40 wt. % MDEA, which resulted in 79% CO2 removal. To improve CO2 removal, a gas distributor and wire mesh packed were used to create gas bubbles at higher geometrical surface. The experimental study successfully removed 99.59% of the total CO2, producing >99 mol% hydrogen gas purity from the second stage that used 20 wt. % NaOH.

Amelioration of biohydrogen production by a two-stage fermentation process

2006 ◽  
Vol 2 (1) ◽  
pp. 44-47 ◽  
Author(s):  
Kaushik Nath ◽  
Debabrata Das
Keyword(s):  
Fermentation Process ◽  
Biohydrogen Production ◽  
Two Stage

scholarly journals Two-Stage Anaerobic Codigestion of Crude Glycerol and Micro-Algal Biomass for Biohydrogen and Methane Production by Anaerobic Sludge Consortium

Fermentation ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 175
Author(s):  
Sureewan Sittijunda ◽  
Napapat Sitthikitpanya ◽  
Pensri Plangklang ◽  
Alissara Reungsang
Keyword(s):  
Methane Production ◽  
Crude Glycerol ◽  
Antagonistic Effect ◽  
Biohydrogen Production ◽  
Anaerobic Sludge ◽  
Two Stage ◽  
Microalgal Biomass ◽  
Factors Affecting ◽  
Production Of Hydrogen ◽  
Stage Process

Optimization of factors affecting biohydrogen production from the codigestion of crude glycerol and microalgal biomass by anaerobic sludge consortium was conducted. The experiments were designed by a response surface methodology with central composite design. The factors affecting the production of hydrogen were the concentrations of crude glycerol, microalgal biomass, and inoculum. The maximum hydrogen production (655.1 mL-H2/L) was achieved with 13.83 g/L crude glycerol, 23.1 g-VS/L microalgal biomass, and 10.3% (v/v) inoculum. The hydrogenic effluents obtained under low, high, and optimal conditions were further used as substrates for methane production. Methane production rates and methane yield of 868.7 mL-CH4/L and 2.95 mL-CH4/L-h were attained with the effluent produced under optimum conditions. The use of crude glycerol and microalgal biomass as cosubstrates had an antagonistic effect on biohydrogen production and a synergistic effect on methane fermentation. The two-stage process provided a more attractive solution, with a total energy of 1.27 kJ/g-VSadded, than the one-stage process.

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