Waste-to-Resource: Pyrolytic Biochar as a key contributor to the Circular Economy

传统的废物使用和处置系统导致原材料资源枯竭，适合填埋的场地枯竭，有毒物质在环境中扩散，并产生温室气体。因此，模仿自然，“循环经济”的概念被提出，旨在保持产品、副产品和废物的效用，并通过利用一个过程的产出作为另一个过程的投入来保持它们的价值，从而实现零浪费解决方案和闭环系统。发现和创新最丰富的领域往往位于传统学科的交叉点。因此，本研究旨在发现和研究生物和热转化的整合机会，寻找新的解决方案，最大限度地提高环境和经济效益，为“循环经济”做出贡献。Discovery基金的长期目标是开发解决方案，从各种不同的低价值或负价值的可持续原料中生产增值能源和化学品。短期目标包括研究先进反应和分离工艺的协同组合和集成技术，旨在实现液体和固体产品的增值，重点是优化热解生物炭的多种用途，作为循环经济的关键贡献者。这些目标将通过以下4个项目实现：(1)将富含木质素的厌氧消化固体残渣（消化物）热解转化为优质的生物炭和富含酚的生物油；(2)分式冷凝分离的水热解产物馏分经厌氧消化转化为甲烷；(3)使用未经加工和改性的生物炭作为厌氧消化过程中气态（二氧化碳和H2S）和液态排放物（有毒金属、药品、激素等）污染物的吸附剂，以及作为增值材料（催化剂、填料、电气元件、食品和饲料添加剂）的其他潜在用途；(4)利用生物炭通过减少抑制和为细菌活性创造最佳环境来优化厌氧消化过程。预计将发现新的转化途径，使科学界和工业界受益，产生经济和环境价值，同时教育和培训准备良好的卫生质量管理人员。

The traditional waste management system of using and disposing contributes to the depletion of raw resources, the exhaustion of sites suitable for landfilling, the dispersion of toxic materials in the environment, and the generation of greenhouse gases. As a result, mimicking nature, the concept of “circular economy” has been proposed, aiming at maintaining the utility of products, co-products and wastes and retain their value by utilizing the outputs of one process as the input to another, leading to zero-waste solutions and closed-loop systems. Often the most fertile areas of discovery and innovation lie at the intersection of traditional disciplines. Therefore, the proposed research aims at discovering and studying the integration opportunities of bio- and thermo-conversion to find new solutions and maximize environmental and economic benefits and contribute to the “circular economy”. The long-term goal of the Discovery grant is the development of solutions to produce value-added energy and chemicals from a variety of different sustainable feedstocks of low or negative value. The short-term goals include the investigation of a synergistic combination and integration of technologies for advanced reaction and separation processes, aimed at valorizing both liquid and solid products, focusing on optimizing multiple uses of pyrolytic bio-char as a key contributor to the circular economy. These objectives will be achieved through 4 projects addressing (1) the pyrolytic conversion of the lignin-rich anaerobic digestion solid residues (digestate) into quality bio-char and phenolic-rich bio-oil; (2) the bio-conversion of the aqueous pyrolysis product fraction, separated by fractional condensation, into methane by anaerobic digestion; (3) the use of raw and modified bio-chars as adsorbents of contaminants from the gaseous (carbon dioxide and H2S) and liquid effluents (toxic metals, pharmaceuticals, hormones,..) of the anaerobic digestion process and for other potential uses as value-added materials (catalysts, fillers, electrical components, food and feed additives,); and (4) the use of bio-char to optimize the anaerobic digestion process by reducing inhibition and creating optimal environments for bacterial activity. It is expected that new conversion pathways will be discovered which will be transferred to the benefits of both the scientific community and industry, generating economic and environmental value, while educating and training well prepared HQP.