Nutrient recovery of the hydrothermal carbonization aqueous product from dairy manure using membrane distillation
Nutrient recovery of the hydrothermal carbonization aqueous product from dairy manure using membrane distillation
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DOI：
10.1080/09593330.2021.1995785
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发表时间：
2021-10
影响因子：
2.8
通讯作者：
N. A. Silva;S. Hiibel
中科院分区：
文献类型：
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作者：
N. A. Silva;S. Hiibel
磷是农业的重要资源，但其有限的供应需要从废物中回收，以免其丢失并导致富营养化。牛粪富含磷，乳品行业的发展和整合使得牛粪管理成为一个重要的问题。研究了水热碳化（HTC）和膜蒸馏（MD）作为处理奶牛粪便和回收营养物质，特别是磷和氮的替代方法。HTC是一种将有机物转化为类似于低品位煤的碳氢化合物的热处理工艺，MD是一种热驱动分离工艺，可以利用HTC产生的低品位废热，因此两种工艺是协同的。HTC过程的副产品是水产物（HAP），其中含有水溶性营养物质和奶牛粪便的有机成分。在这项工作中，评估了MD在溶解有机碳存在下浓缩营养物质的功效。样品包括合成营养丰富的溪流以及在HTC温度范围从200°C到260°C生产的HAP。在每种情况下，营养物质都成功地集中在饲料循环中，拒斥率为99%。研究发现，溶解的碳污染MD膜的程度与其疏水性成正比，葡萄糖几乎没有污染，而在较高温度下产生的HAP溶液则有大量污染。图形抽象
ABSTRACT Phosphorus is a crucial resource for the agricultural industry, but its limited supply requires recovery from waste materials before it is lost and leads to eutrophication. Dairy manure is rich with phosphorus, and the growth and consolidation within the dairy industry has led to dairy manure management becoming a significant concern. Hydrothermal carbonization (HTC) and membrane distillation (MD) were investigated as an alternative to treat dairy manure and recover nutrients, specifically phosphorus and nitrogen. HTC is a thermal treatment process that converts organic matter into a hydrochar analogous to a low-grade coal, and MD is a thermally-driven separation process that can utilize low-grade waste heat from HTC, thus the two processes are synergetic. A byproduct of the HTC process is the aqueous product (HAP) that contains the water-soluble nutrients and organic components of dairy manure. In this work, the efficacy of MD to concentrate the nutrients in the presence of dissolved organic carbon was assessed. Samples included synthetic nutrient-rich streams as well as HAP produced at HTC temperatures ranging from 200 °C to 260 °C. In each case, the nutrients were successfully concentrated in the feed loop with rejections >99%. Dissolved carbon was found to foul the MD membrane at levels proportional to its hydrophobicity, with little fouling observed for glucose and substantial fouling observed for HAP solutions created at higher temperatures. GRAPHICAL ABSTRACT