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首页> 外文期刊>Environmental Science & Technology >Balancing Water Sustainability and Productivity Objectives in Microalgae Cultivation: Siting Open Ponds by Considering Seasonal Water-Stress Impact Using AWARE-US
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Balancing Water Sustainability and Productivity Objectives in Microalgae Cultivation: Siting Open Ponds by Considering Seasonal Water-Stress Impact Using AWARE-US

机译：在微藻栽培中平衡水的可持续性和生产力目标：使用AWARE-US考虑季节性水压力的影响，对开放池塘进行选址

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摘要

Microalgae have great potential as an energy and feed resource. Here we evaluate the water use associated with freshwater algae cultivation and find it is possible to scale U.S. algae biofuel production to 20.8 billion liters of renewable diesel annually without significant water-stress impact. Among potential sites, water-stress is significantly more variable than algae productivity across location and season. Thus, it is possible to reduce water-stress impact, quantified as water scarcity footprint, through the choice of algae site location. We test three site-selection criteria based on (1) biomass productivity, (2) water-use efficiency, and (3) water-stress impact and find that adding water-stress constraints to productivity-based ranking of suitable sites reduces water-stress impact by 97% and water consumption by half, compared with biomass-productivity ranking alone, with little productivity impact (＜1.7% per-site on average). With 20.8 billion liters, algae could meet 19.7% of U.S. jet fuel demand with a freshwater demand of less than 1,4% of U.S. irrigation consumption. Evaluating water-stress impact is important because the impact of unit water consumption on water stress varies significantly across regions and seasons. Considering seasonal water balances allows producers to understand the combined seasonal effects of hydrologic flows and productivity, thereby avoiding potential short-term water stress.
机译：微藻作为能源和饲料资源具有巨大的潜力。在这里，我们评估了与淡水藻类养殖相关的用水量，发现有可能将美国藻类生物燃料的生产规模扩大到每年208亿升可再生柴油，而不会显着降低水压力。在潜在的地点中，整个地点和季节的水分胁迫比藻类生产力变化更大。因此，可以通过选择藻类地点来减少对水的压力影响，量化为缺水足迹。我们基于（1）生物量生产力，（2）用水效率和（3）水分压力影响测试了三个选址标准，并发现在基于生产率的合适土地等级中增加水分胁迫约束可以减少用水量。与单独的生物质生产率排名相比，该方法的压力影响降低了97％，耗水量减少了一半，对生产率的影响很小（平均每个站点＜1.7％）。藻类拥有208亿升的水量，可以满足美国航空燃料需求的19.7％，而淡水需求不到美国灌溉用水的1.4％。评估水资源压力影响非常重要，因为单位耗水量对水资源压力的影响在不同地区和不同季节之间差异很大。考虑到季节性的水平衡，生产者可以了解水文流量和生产力的综合季节性影响，从而避免潜在的短期缺水压力。

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  • 来源
    《Environmental Science & Technology》 |2020年第4期|2091-2102|共12页
  • 作者

    Hui Xu; Uisung Lee; André M. Coleman; Mark S. Wigmosta; Ning Sun; Troy Hawkins; Michael Wang;

  • 作者单位

    Systems Assessment Group Energy Systems Division Argonne National Laboratory Lemont Illinois 60439 United States;

    Hydrology Technical Group Earth Systems Science Division Pacific Northwest National Laboratory Richland Washington 99352 United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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