News Column

Findings from University of Louisville Reveals New Findings on Hydrogen

June 27, 2014

By a News Reporter-Staff News Editor at Energy Weekly News -- Investigators discuss new findings in Hydrogen. According to news reporting out of Louisville, Kentucky, by VerticalNews editors, research stated, "In two-stage anaerobic expanded granular sludge bed (EGSB) reactors, up to one-third of the chemical oxygen demand (COD) content is naturally preacidified in a first stage preacidification (PA) tank and then fed to a second stage digester for conversion to methane. Hydrogen, an intermediate product of the first stage, could be theoretically captured escaping from the PA tank and sent to the digester to biologically convert the carbon dioxide to methane for biogas enhancement."

Our news journalists obtained a quote from the research from the University of Louisville, "Pilot-scale tests were conducted to assess the impact of introducing hydrogen gas on biogas quality enhancement and substrate removal efficiency in an EGSB digester fed with distillery wastewater at mesophilic temperature (35 degrees C). The amount of hydrogen introduced, 0.15 or 0.30L/(L(biogas)day), was less than what could be theoretically captured escaping from the PA tank. Biogas quality was enhanced by approximate to 10% to 20% and the energy yield increased by approximate to 33-42% depending on the hydrogen injection rate. COD removal efficiency remained constant at about approximate to 98% with and without hydrogen."

According to the news editors, the research concluded: "The Monod model maximum substrate removal rate constant slightly increased, while the half-saturation coefficient slightly decreased with the added hydrogen, both indicating that hydrogen injection did not negatively affect substrate removal efficiency or biomass culture stability."

For more information on this research see: Impact of Supplemental Hydrogen on Biogas Enhancement and Substrate Removal Efficiency in a Two-Stage Expanded Granular Sludge Bed Reactor. Environmental Engineering Science, 2014;31(5):253-260. Environmental Engineering Science can be contacted at: Mary Ann Liebert, Inc, 140 Huguenot Street, 3RD Fl, New Rochelle, NY 10801, USA. (Mary Ann Liebert, Inc. -; Environmental Engineering Science -

Our news journalists report that additional information may be obtained by contacting M. Ghorbanian, University of Louisville, Conn Center Renewable Energy Res, Louisville, KY 40292, United States. Additional authors for this research include R.M. Lupitskyy, J.V. Satyavolu and R.E. Berson.

Keywords for this news article include: Biotechnology, Gases, Biogas, Energy, Kentucky, Elements, Hydrogen, Louisville, Oil and Gas, United States, Bioengineering, Inorganic Chemicals, North and Central America

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Source: Energy Weekly News

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