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Comparative Evaluation of CO 2 Fixation of Microalgae Strains at Various CO 2 Aeration Conditions
Waste and Biomass Valorization ( IF 2.6 ) Pub Date : 2020-09-10 , DOI: 10.1007/s12649-020-01226-8
Jungsu Park , Gopalakrishnan Kumar , Péter Bakonyi , Jakub Peter , Nándor Nemestóthy , Stanislaw Koter , Wojciech Kujawski , Katalin Bélafi-Bakó , Zbynek Pientka , Raul Muñoz , Sang-Hyoun Kim

Abstract

This study investigated microalgal CO2 fixation at the CO2 concentration ranging from 5 to 40% and the CO2 loading rate of 14.4 to 57.6 L/L-d. Chlorella sp. (AG10133) was selected as the optimal strain for CO2 fixation among examined algal strains. The microalgal CO2 fixation was highly dependent on the CO2 loading rate as well as CO2 concentration. In batch culture, the highest CO2 fixation rate of 1.785 g/L-d was obtained at the CO2 concentration and the CO2 loading rate of 15% and 43.2 L/L-d, respectively. The high CO2 fixation performance was maintained at CO2 40% with the same CO2 loading rate. On the other hand, CO2 loading rate over 43.2 L/L-d at CO2 15% deteriorated CO2 fixation along with the decrease of microalgal growth. In continuous culture, the CO2 fixation rate of 2.25 g/L-d was achieved at the pseudo-steady state. The microalgal CO2 fixation would be suitable for high-strength CO2 gas stream such as biogas by providing proper CO2 loading rate.

Graphic Abstract



中文翻译:

在不同的CO 2曝气条件下微藻菌株的CO 2固定比较评估

摘要

这项研究调查了微藻将CO 2固定在5至40%的CO 2浓度和14.4至57.6 L / Ld的CO 2负载率。小球藻藻。在检测的藻类菌株中,选择(AG10133)作为CO 2固定的最佳菌株。微藻的CO 2固定高度依赖于CO 2的负载速率以及CO 2的浓度。在分批培养中,在CO 2浓度为15%和CO 2负载率为43.2 L / Ld时,最高的CO 2固定率达到1.785 g / Ld 。高CO 2在相同的CO 2负载率下,固定性能保持在CO 2 40%。另一方面,当CO 2为15%时,CO 2负载率超过43.2 L / Ld,随着微藻类生长的减少,CO 2固定性变差。在连续培养中,在拟稳态下,CO 2固定率为2.25 g / Ld。通过提供适当的CO 2加载速率,微藻类CO 2固定将适合于高强度的CO 2气流,例如沼气。

图形摘要

更新日期:2020-09-11
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