Department of Biological and Environmental Engineering, Cornell University, 111 Wing Drive, Ithaca, NY 14850, USA.
Facoltà di Ingegneria e Architettura, Università degli Studi di Enna "Kore", Cittadella Universitaria, 94100 Enna, Italy; Dipartimento di Ingegneria Civile Ambientale e Meccanica, Università degli Studi di Trento, via Mesiano 77, 38123 Trento, Italy.
Bioresour Technol. 2021 May;328:124765. doi: 10.1016/j.biortech.2021.124765. Epub 2021 Feb 9.
Hydrothermal carbonization (HTC) and pyrolysis are two promising thermochemical conversion strategies to valorize agricultural wastes, yet neither process can be implemented alone to sustainably upgrade both wet and dry feedstocks. HTC is ideal for wet feedstocks, such as manure, but its solid hydrochars suffer from low surface area and stability. Pyrolysis is well suited to dry agricultural residues, but pyrolysis biochars have low nutrient contents and bio-oils are often highly oxygenated. We propose an integrated process that co-pyrolyzes a nutrient-rich cow manure hydrochar with raw agricultural residues, which effectively reduces the environmental impact of these wastes while producing value-added bioproducts. Biochars produced from the proposed process are more suitable for soil amendments due to their enhancement in bioavailable nutrients and surface area than the manure hydrochars and raw biomass. Co-pyrolysis of blends enriched with cow manure yield oils higher in alkanes and alkenes with fewer oxygenated compounds.
水热碳化 (HTC) 和热解是两种有前途的热化学转化策略，可以有效地利用农业废弃物，但这两种方法都不能单独实施，以可持续地升级湿原料和干原料。HTC 是处理湿原料（如粪便）的理想方法，但它的固体水焦碳的表面积和稳定性较低。热解非常适合于干农业残余物，但热解生物炭的养分含量较低，生物油通常高度含氧。我们提出了一种集成工艺，将富含养分的牛粪水焦碳与原始农业残余物共热解，这有效地减少了这些废物的环境影响，同时生产了有附加值的生物制品。与牛粪水焦碳和原始生物质相比，该工艺生产的生物炭由于其生物可利用养分和表面积的增加，更适合作为土壤改良剂。用富含牛粪的混合物进行共热解，可以得到更多烷烃和烯烃、含氧化合物较少的油。
