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Protecting water resources in biofuels production

机译:保护生物燃料生产中的水资源

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The Energy Independence and Security Act of 2007 mandates a five-fold increase in current biofuels production. This will substantially increase the current production of corn-based ethanol despite widespread concerns over its negative impact on the availability and quality of already stressed water resources. The National Academy of Sciences' (NAS) recently-released report on water use in biofuels production (principally corn-based ethanol) proposes improved on-farm irrigation efficiency and water recycling within biorefineries to reduce the impact on water availability. In a classic case of unintended consequences, we demonstrate that these measures may decrease the sustainability of biofuels production by increasingly stressing water supplies. Instead, these measures may be more effective in reducing the water quality impact of biofuels production-a role that the NAS report does not emphasize.
机译:2007年的《能源独立与安全法案》要求当前生物燃料的产量增加五倍。尽管人们普遍担心玉米基乙醇对已经紧张的水资源的可利用性和质量产生负面影响,但这将大大提高目前玉米基乙醇的产量。美国国家科学院(NAS)最近发布的有关生物燃料生产中用水(主要是玉米基乙醇)的报告提出,提高农场的灌溉效率和生物精炼厂内的水循环利用,以减少对水可利用性的影响。在意想不到的后果的典型案例中,我们证明了这些措施可能会通过增加供水压力来降低生物燃料生产的可持续性。相反,这些措施可能在减少生物燃料生产对水质的影响方面更有效-NAS报告并未强调这一作用。

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