Role of hydrogen (H2 ) mass transfer in microbiological H2 -threshold studies

Biodegradation
Fatih KaradagliB E Rittmann

Abstract

Gas-to-liquid mass transfer of hydrogen (H2) was investigated in a gas-liquid reactor with a continuous gas phase, a batch liquid phase, and liquid mixing regimes relevant to assessing kinetics of microbial H2 consumption. H2 transfer was quantified in real-time with a H2 microsensor for no mixing, moderate mixing [100 rotations per minute (rpm)], and rapid mixing (200 rpm). The experimental results were simulated by mathematical models to find best-fit values of volumetric mass transfer coefficients-kLa-for H2, which were 1.6/day for no mixing, 7/day for 100 rpm, and 30/day for 200 rpm. Microbiological H2-consumption experiments were conducted with Methanobacterium bryantii M.o.H. to assess effects of H2 mass transfer on microbiological H2-threshold studies. The results illustrate that slow mixing reduced the gas-to-liquid H2 transfer rate, which fell behind the rate of microbiological H2 consumption in the liquid phase. As a result, the liquid-phase H2 concentration remained much lower than the liquid-phase H2 concentration that would be in equilibrium with the gas-phase H2 concentration. Direct measurements of the liquid-phase H2 concentration by an in situ probe demonstrated the problems associated with slow H2 transfer in ...Continue Reading

References

Mar 1, 1968·Journal of Bacteriology·T D Brock, M L Brock
Jul 1, 1984·Applied and Environmental Microbiology·D R LovleyJ G Ferry
Nov 2, 2001·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·X X LuJ Gerritse
Aug 2, 2005·Environmental Science & Technology·Fatih Karadagli, Bruce E Rittmann
Jun 1, 1982·Applied and Environmental Microbiology·D R LovleyM J Klug
Jun 1, 1985·Applied and Environmental Microbiology·D R Lovley
Nov 9, 2006·Biodegradation·Fatih Karadagli, Bruce E Rittmann
Jul 1, 2008·Nature Reviews. Microbiology·Rudolf K ThauerReiner Hedderich
Jan 5, 1995·Biotechnology and Bioengineering·G E Strong, R Cord-Ruwisch
Dec 17, 2008·Environmental Science & Technology·Boris FaybishenkoStephen Koenigsberg
Feb 15, 2016·Current Opinion in Biotechnology·Robert Nerenberg
Apr 30, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Joshua P BoltzGlen T Daigger
Jan 13, 2018·Water Research·Bruce E Rittmann

❮ Previous
Next ❯

Citations

Jan 6, 2021·International Journal of Molecular Sciences·Mariamichela LanzilliGiuliana d'Ippolito

❮ Previous
Next ❯

Methods Mentioned

BETA
protein assay

Software Mentioned

SensorTrace Basic
Matlab

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.