Using microalgae in the circular economy to valorise anaerobic digestate: challenges and opportunities.
Using microalgae in the circular economy to valorise anaerobic digestate: challenges and opportunities.
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DOI：
10.1016/j.biortech.2018.07.100
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发表时间：
2018-11
影响因子：
11.4
通讯作者：
William A V Stiles;D. Styles;S. Chapman;S. Esteves;A. Bywater;L. Melville;A. Silkina;I. Lupatsch-I.-Lupat
中科院分区：
文献类型：
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作者：
William A V Stiles;D. Styles;S. Chapman;S. Esteves;A. Bywater;L. Melville;A. Silkina;I. Lupatsch-I.-Lupat
管理有机废物流是农业行业面临的一项重大挑战。有机废物的厌氧消化（AD）是废物管理体系中的首选方案，因为这一过程可以产生可再生能源，减少废物储存的排放，并生产肥料材料。然而，硝酸盐脆弱区立法和季节限制可以限制农业用地上的硝酸盐使用。在本文中，我们展示了培养微藻的潜力，直接在稀释后，或间接从生物肥料提取后剩余的污水作为原料，以海藻酸钠。由此产生的微藻生物质可用于生产牲畜饲料、生物燃料或更高价值的生物产品。该方法可以缓解可能的区域过度，并用生物资源替代传统的高影响力产品，提高循环经济的可持续性。利用藻类技术回收来自阿拉斯加州的营养物质还处于早期阶段。我们提出并讨论与开发这项新技术相关的挑战和机遇。
Managing organic waste streams is a major challenge for the agricultural industry. Anaerobic digestion (AD) of organic wastes is a preferred option in the waste management hierarchy, as this process can generate renewable energy, reduce emissions from waste storage, and produce fertiliser material. However, Nitrate Vulnerable Zone legislation and seasonal restrictions can limit the use of digestate on agricultural land. In this paper we demonstrate the potential of cultivating microalgae on digestate as a feedstock, either directly after dilution, or indirectly from effluent remaining after biofertiliser extraction. Resultant microalgal biomass can then be used to produce livestock feed, biofuel or for higher value bio-products. The approach could mitigate for possible regional excesses, and substitute conventional high-impact products with bio-resources, enhancing sustainability within a circular economy. Recycling nutrients from digestate with algal technology is at an early stage. We present and discuss challenges and opportunities associated with developing this new technology.