Enhanced algal CO2 sequestration through calcite deposition by Chlorella sp and Spirulina platensis in a mini-raceway pond
Enhanced algal CO2 sequestration through calcite deposition by Chlorella sp and Spirulina platensis in a mini-raceway pond
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DOI：
10.1016/j.biortech.2009.10.061
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发表时间：
2010-04-01
影响因子：
11.4
通讯作者：
Chakrabarti, Tapan
中科院分区：
文献类型：
--
作者：
Ramanan, Rishiram;Kannan, Krishnamurthi;Chakrabarti, Tapan
利用藻类反应器进行二氧化碳生物封存是最有前途的、环境友好的二氧化碳封存技术之一。开展这项研究是为了缓解与该技术相关的某些限制，如低二氧化碳固定效率和低生物量产量。这项研究表明，通过机动的化学辅助生物封存二氧化碳，可以提高二氧化碳封存效率。小球藻(Chlorella sp.)在输入CO2浓度为10%时，钝顶螺旋藻的平均固定率分别为46%和39%。研究了一种有效的碳酸酐酶抑制剂乙酰唑胺对CO2固定效率的影响，以论证碳酸酐酶在方解石沉积中的作用。用扫描电子显微镜、耦合电子能谱和X射线衍射仪对两种物质形成的方解石进行了表征。方解石沉积的总体方案结合二氧化碳固定和可商业利用的生物质作为一种产品，在努力隔离不断增加的二氧化碳排放方面似乎是一个可行的选择。(C)2009爱思唯尔有限公司。保留所有权利。
Biological CO2 sequestration using algal reactors is one of the most promising and environmentally benign technologies to sequester CO2. This research study was taken up to alleviate certain limitations associated with the technology such as low CO2 sequestration efficiency and low biomass yields. The study demonstrates an increase in CO2 sequestration efficiency by maneuvering chemically aided biological sequestration of CO2. Chlorella sp. and Spirulina platensis showed 46% and 39% mean fixation efficiency, respectively, at input CO2 concentration of 10%. The effect of acetazolamide, a potent carbonic anhydrase inhibitor, on CO2 sequestration efficiency was studied to demonstrate the role of carbonic anhydrase in calcite deposition. Calcite formed by both species was characterized by scanning electron microscopy coupled electron dispersive spectroscopy and X-ray diffraction. The overall scheme of calcite deposition coupled CO2 fixation with commercially utilizable biomass as a product seems a viable option in the efforts to sequester increasing CO2 emissions. (C) 2009 Elsevier Ltd. All rights reserved.