Biomass and lipid production of marine microalgae using municipal wastewater and high concentration of CO2
Biomass and lipid production of marine microalgae using municipal wastewater and high concentration of CO2
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DOI：
10.1016/j.apenergy.2011.03.043
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发表时间：
2011-10-01
期刊：
影响因子：
11.2
通讯作者：
Guo, Rongbo
中科院分区：
文献类型：
--
作者：
Jiang, Liling;Luo, Shengjun;Guo, Rongbo
为降低微藻生物柴油生产成本，研究了以海水和城市污水混合液为培养基，利用烟气中CO2培养海洋微藻的可行性。研究了不同比例的城市污水和15%CO2通气量对微拟球藻生长的影响，并研究了氮饥饿和强光下微藻的脂质积累。结果表明，微藻在50%的城市污水中生长最佳，在15%CO2的曝气条件下，微藻的生长得到进一步的显著促进。在缺氮和强光的组合下，微拟球藻细胞从第一生长期转入第二脂质积累期，微拟球藻的生物量和脂质产量均显著增加。经过12天的第二期培养，生物量浓度和总脂肪含量分别从0.71增加到2.23 g L-1和33.8- 59.9%。本研究表明，利用城市污水替代海水培养基中的营养物质和利用烟道气提供CO2，培养含油海洋微藻生产生物柴油是可行的。皇冠版权所有（C）2011由爱思唯尔有限公司出版。保留所有权利。
In order to reduce the cost of the production of microalgae for biodiesel, the feasibility of using the mixture of seawater and municipal wastewater as culture medium and CO2 from flue gas for the cultivation of marine microalgae was investigated in this study. Effects of different ratios of municipal wastewater and 15% CO2 aeration on the growth of Nannochloropsis sp. were examined, and lipid accumulation of microalgae was also studied under nitrogen starvation and high light. It was found that optimal growth of microalgae occurred in 50% municipal wastewater, and the growth was further significantly enhanced by aeration with 15% CO2. When Nannochloropsis sp. cells were transferred from the first growth phase to the second lipid accumulation phase under the combination of nitrogen deprivation and high light, both biomass and lipid production of Nannochloropsis sp. were significantly increased. After 12 clays of the second-phase cultivation, the biomass concentration and total lipid content increased from 0.71 to 2.23 g L-1 and 33.8-59.9%, respectively. This study suggests that it is possible to utilize municipal wastewater to replace nutrients in seawater medium and use flue gas to provide CO2 in the cultivation of oil-bearing marine microalgae for biodiesel. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.