A novel gas separation integrated membrane bioreactor to evaluate the impact of self-generated biogas recycling on continuous hydrogen fermentation

作者：Bakonyi Peter; Buitron German; Valdez Vazquez Idania; Nemestothy Nandor; Belafi Bako Katalin

来源：Applied Energy, 2017, 190: 813-823.

DOI：10.1016/j.apenergy.2016.12.151

• Biohydrogen
• Membrane bioreactor
• Gas separation
• Microbial community analysis
• Dark fermentation

A Gas Separation Menibrane Bioreactor (GSMBR) by integrating membrane technology with a continuous biohydrogen fermenter was designed. The feasibility of this novel configuration for the improvement of hydrogen production capacity was tested by stripping the fermentation liquor with CO2- and H-2-enriched gases, obtained directly from the bioreactor headspace. The results indicated that sparging the bioreactor with the CO2-concentrated fraction of the membrane separation unit (Onsisting of two PDMS modules) enhanced the steady-state H-2 productivity (8.9-9.2 L H-2/L-d) compared to the membrane-less control CSTR to be characterized with 6.96-7.35 L H-2/L-d Values. On the other hand, purging with the H-2-rich gas strongly depressed the achievable productivity (2.7-3.03 L H-2/L-d). Microbial community structure and soluble metabolic products were monitored to assess the GSMBR behavior. The study demonstrated that stripping the bioH(2) fermenter with its own, self-generated atmosphere after adjusting its composition (to higher CO2-content) can be a promising way to intensify dark fermentative H-2 evolution.

• 出版日期2017-3-15