Kinetic models of biological hydrogen production by Enterobacter aerogenes
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ORIGINAL RESEARCH PAPER
Kinetic models of biological hydrogen production by Enterobacter aerogenes Fatemeh Boshagh . Khosrow Rostami
Received: 3 May 2020 / Accepted: 15 November 2020 Ó Springer Nature B.V. 2020
Abstract Dark fermentative hydrogen production from glucose by Enterobacter aerogenes was studied. The kinetic models of modified Gompertz and Logistic were employed to investigate the progress of hydrogen production. The predicted maximum hydrogen production (Hmax) by modified Gompertz and Logistic was 11.92 and 11.28 mL, respectively. The kinetic models of modified Gompertz, Logistic, and Richards were used to study biomass growth in batch experiments. The maximum biomass growth (Xmax) by models of modified Gompertz, Logistic, and Richards was 4.90, 4.85, and 4.95 (g L-1), respectively. The modified Gompertz was applied to simulate the consumption of glucose where the maximum degraded glucose (Smax) was obtained 19.77 g L-1. The correlation coefficients of all the models were over 0.97, which illustrate that the models fit the data very well. However, the modified Gompertz model presents higher R2 and lower RSS and is more appropriate than the other models. Keywords Biomass growth Dark fermentation Modified Logistic Modified Gompertz Substrate degradation
F. Boshagh K. Rostami (&) Department of Biotechnology, Iranian Research Organization for Science and Technology (IROST), P.O. Box 3353-5111, Tehran, Iran e-mail: [email protected]
Introduction Nowadays, using fuels not compete with resources of water and food and not emit CO2 is necessary to decrease greenhouse gas emission and global warming. In recent years, hydrogen has received worldwide attention as a clean and efficient energy carrier with the potential to replace liquid fossil fuels (Boshagh and Rostami 2020). The hydrogen production via fermentation can be divided into photo fermentation and dark fermentation (Kumar et al. 2001). The dark fermentation compared with photo fermentation presents advantages such as easier to conduct and control, no need light, higher yield and production rate, stability and feasibility for industrialization, using a wide variety of carbon sources, and lower operating costs (Shi et al. 2010). Modelling and optimization were performed to improve production of hydrogen as a complicated multiproduct process. (Wang and Wan 2009). The kinetic models are divided into structured and unstructured models. The structured models consider metabolic pathways and are generally more complicated than the unstructured models. In structured model, the biochemical and physiological aspects of growth and metabolite synthesis were considered simultaneously (Mu et al. 2006). Types of kinetic models such as classical and modified Monod, modified Gompertz, modified Logistic, anaerobic digestion model No.1 (ADM1), Richards, Michaelis–Menten, Andrew and
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Biotechnol Lett
modified Andrew, Ratkowsky and modified Ratkowsky, Arrhenius, Han–Levenspiel and modified Han–Levenspiel
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