This page has only limited features, please log in for full access.

Dr. Fasil Ejigu Eregno
Institute for Building Energy and Materials Technology, UiT The Arctic University of Norway, Lodve Langesgate 2, 8514 Narvik, Norway

Basic Info

Basic Info is private.

Research Keywords & Expertise

0 hydrological modeling
0 Water quality analysis and modeling
0 Chemical–microbial health risk assessment
0 Holistic approaches to complex environmental challenges that encompass technical, social, and economic aspects
0 Water supply and wastewater treatment systems

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 12 March 2020 in Energies
Reads 0
Downloads 0

In this paper, the inhibitory effects of added hydrogen in reactor headspace on fermentative hydrogen production from acidogenesis of glucose by a bacterium, Clostridium acetobutylicum, was investigated experimentally in a batch reactor. It was observed that hydrogen itself became an acute inhibitor of hydrogen production if it accumulated excessively in the reactor headspace. A mathematical model to simulate and predict biological hydrogen production process was developed. The Monod model, which is a simple growth model, was modified to take inhibition kinetics on microbial growth into account. The modified model was then used to investigate the effect of hydrogen concentration on microbial growth and production rate of hydrogen. The inhibition was moderate as hydrogen concentration increased from 10% to 30% (v/v). However, a strong inhibition in microbial growth and hydrogen production rate was observed as the addition of H2 increased from 30% to 40% (v/v). Practically, an extended lag in microbial growth and considerably low hydrogen production rate were detected when 50% (v/v) of the reactor headspace was filled with hydrogen. The maximum specific growth rate (µmax), substrate saturation constant (ks), a critical hydrogen concentration at which microbial growth ceased (H2*) and degree of inhibition were found to be 0.976 h−1, 0.63 ± 0.01 gL, 24.74 mM, and 0.4786, respectively.

ACS Style

Subhashis Das; Rajnish Kaur Calay; Ranjana Chowdhury; Kaustav Nath; Fasil Ejigu Eregno. Product Inhibition of Biological Hydrogen Production in Batch Reactors. Energies 2020, 13, 1318 .

AMA Style

Subhashis Das, Rajnish Kaur Calay, Ranjana Chowdhury, Kaustav Nath, Fasil Ejigu Eregno. Product Inhibition of Biological Hydrogen Production in Batch Reactors. Energies. 2020; 13 (6):1318.

Chicago/Turabian Style

Subhashis Das; Rajnish Kaur Calay; Ranjana Chowdhury; Kaustav Nath; Fasil Ejigu Eregno. 2020. "Product Inhibition of Biological Hydrogen Production in Batch Reactors." Energies 13, no. 6: 1318.