Production of bio-fuels (hydrogen and lipids) through a photofermentation process

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• 作者：Pietro Carlozzi ; Arianna Buccioni ; Sara Minieri ; Benjamin Pushparaj ; Raffaella Piccardi ; Alba Ena ; Cristina Pintucci
• 关键词：Bio-H₂ ; Biodiesel ; Hydrogen production rate ; Rhodopseudomonas palustris ; Boltzmann’ ; s sigmoidal regression model
• 刊名：Bioresource Technology
• 出版年：2010
• 出版时间：May 2010
• 年：2010
• 卷：101
• 期：9
• 页码：3115-3120
• 全文大小：269 K

文摘

The purple non-sulfur photosynthetic bacteria Rhodopseudomonas palustris (strain 42OL) was investigated for a co-production of both bio-H₂ and biodiesel (lipids). The investigation was carried out using malic and glutamic acids in a fed-batch cultivation system under continuous irradiances of 36, 56, 75, 151, 320, 500, and 803 W m⁻². Boltzmann’s sigmoidal regression model was used to determine growth kinetic parameters during hydrogen photoevolution. The upper limit of volumetric hydrogen photoevolution was 15.5 ± 0.9 ml l⁻¹ h⁻¹. During the entire cultivation period (408 h), the highest average hydrogen production rate (HPR_av) of 11.1 ± 3.1 ml l⁻¹ h⁻¹ was achieved at an irradiance of 320 W m⁻². Biomasses stored at the end of each experimental set were analyzed in order to determine lipid content, which ranged from a minimum of 22 ± 1 % to a maximum of 39 ± 2 % of biomass dry weight.