Enhanced hydrogen production by controlling light intensity in sulfur-deprived Chlamydomonas reinhardtii culture
Enhanced hydrogen production by controlling light intensity in sulfur-deprived Chlamydomonas reinhardtii culture
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DOI：
10.1016/j.ijhydene.2006.06.026
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发表时间：
2006-09
影响因子：
7.2
通讯作者：
Jun Pyo Kim;C. D. Kang;T. Park;Misa Kim;S. Sim
中科院分区：
文献类型：
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作者：
Jun Pyo Kim;C. D. Kang;T. Park;Misa Kim;S. Sim
莱茵衣藻是一种绿藻，可以在厌氧条件下利用光能从水中产生氢气。这项工作报告了通过控制缺硫厌氧莱茵衣藻培养物中的光强度来提高氢气产量。总体氢气产量取决于 60–200μEm-2s-1 范围内的光强度。在光强度为200μEm-2s-1时，由于在脱硫后的最初24小时内迅速开始产氢和叶绿素的最大增加，因此获得了最大产氢量。然而，由于光系统II受到过量光的光损伤，在300μEm-2s-1的光强度下，氢气的产生受到抑制。最大产氢量和最大产氢率分别为225mlH2l-1culture和2.01mlH2g-1cellsh-1。因此，通过将光强度控制在低于饱和的水平，可以最大化脱硫莱茵衣藻培养物的氢产量。
Chlamydomonas reinhardtii is a green alga that can use light energy to produce hydrogen from water under anaerobic conditions. This work reports the enhancement of hydrogen production by controlling the light intensity in sulfur-deprived anaerobic C. reinhardtii cultures. The overall hydrogen production was dependent on light intensity in the range of 60–200μEm-2s-1. Maximum hydrogen production was obtained at a light intensity of 200μEm-2s-1as a result of the rapid initiation of hydrogen production and the greatest increase of chlorophyll during the initial 24h after sulfur deprivation. However, the hydrogen production was inhibited at an intensity of 300μEm-2s-1of light owing to photosystem II photodamage by excess light. The maximum hydrogen production and the maximum specific production rate of hydrogen were 225mlH2l-1culture and 2.01mlH2g-1cellsh-1, respectively. Thus, hydrogen production by sulfur-deprived C. reinhardtii cultures can be maximized by controlling the light intensity at levels below saturation.