Microalgal Cultivation in Treating Liquid Digestate from Biogas Systems

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• 作者：Ao Xia¹ ; ² ; Jerry D. Murphy¹ ; ³ ; ^{jerry.murphy@ucc.ie" class="auth_mail" title="E-mail the corresponding author}
• 关键词：biogas ; digestate ; microalgae ; nutrient removal ; carbon dioxide
• 刊名：Trends in Biotechnology
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：34
• 期：4
• 页码：264-275
• 全文大小：1671 K

文摘

Biogas production via anaerobic digestion (AD) has rapidly developed in recent years. In addition to biogas, digestate is an important byproduct. Liquid digestate is the major fraction of digestate and may contain high levels of ammonia nitrogen. Traditional processing technologies (such as land application) require significant energy inputs and raise environmental risks (such as eutrophication). Alternatively, microalgae can efficiently remove the nutrients from digestate while producing high-value biomass that can be used for the production of biochemicals and biofuels. Both inorganic and organic carbon sources derived from biogas production can significantly improve microalgal production. Land requirement for microalgal cultivation is estimated as 3% of traditional direct land application of digestate.