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Abstract：
With the increasing production of municipal sewage sludge (MSS) worldwide, the development of efficient and sustainable strategies for its management is crucial. Pyrolysis of MSS offers several benefits, including volume reduction, pathogen elimination, and energy recovery through the production of biochar, syngas, and bio-oil. However, the process can be limited by the composition of the MSS, which can affect the quality of the biochar. Co-pyrolysis has emerged as a promising solution for the sustainable management of MSS, reducing the toxicity of biochar and improving its physical and chemical properties to expand its potential applications. This review discusses the status of MSS as a feedstock for biochar production. It describes the types and properties of various co-substrates grouped according to European biochar certification requirements, including those from forestry and wood processing, agriculture, food processing residues, recycling, anaerobic digestion, and other sources. In addition, the review addresses the optimization of co-pyrolysis conditions, including the type of furnace, mixing ratio of MSS and co-substrate, co-pyrolysis temperature, residence time, heating rate, type of inert gas, and flow rate. This overview shows the potential of different biomass types for the upgrading of MSS biochar and provides a basis for research into new co-substrates. This approach not only mitigates the environmental impact of MSS but also contributes to the wider goal of achieving a circular economy in MSS management.
摘要：
随着世界范围内城市污水污泥(MSS)产量的增加,制定有效和可持续的管理策略至关重要。MSS的热解提供了几个好处，包括体积减少，病原体消除，通过生产生物炭来回收能源，合成气,生物油。然而,该过程可能受到MSS组成的限制，这会影响生物炭的质量。共热解已成为MSS可持续管理的有希望的解决方案，降低生物炭的毒性,改善其理化性质,扩大其潜在的应用。本文综述了MSS作为生物炭生产原料的现状。它描述了根据欧洲生物炭认证要求分组的各种共底物的类型和特性，包括林业和木材加工，农业,食品加工残留物，回收,厌氧消化,和其他来源。此外,这篇综述涉及共热解条件的优化，包括炉子的类型，MSS和共底物的混合比，共热解温度，停留时间,加热速率,惰性气体类型，和流量。该概述显示了不同生物质类型对MSS生物炭的升级潜力，并为研究新的共底物提供了基础。这种方法不仅减轻了MSS对环境的影响，而且还有助于实现MSS管理中实现循环经济的更广泛目标。
