A new opportunity for producing valuable biorefinery products can be found by integrating biochemical and thermochemical processing with municipal wastewater treatment. This study is the first to evaluate the kinetic triplet and thermodynamic parameters from the pyrolysis of typical Brazilian anaerobic sewage sludge performed in the framework of a multi-step solid-state process. The physicochemical characteristics of the anaerobic sewage sludge are comparable to those obtained from low-rank coals. The pyrolysis characteristics were analyzed by non-isothermal thermogravimetry under different heating rates (10, 25, 50, and 90 K min⁻¹) in an inert atmosphere. Two devolatilization stages were distinguished from the active pyrolysis zone, with an average mass loss of 47.56 wt% (sum) in the range of 398–953 K. For each devolatilization stage, three isoconversional methods (Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose, and Starink) were utilized to calculate the activation energy, and then the compensation effect method was applied to find the pre-exponential factor. The average activation energies calculated ranged from 113.7 to 117.3 kJ mol⁻¹ for the first stage and from 115.7 to 121.9 kJ mol⁻¹ for the second stage, with respective pre-exponential factors of 7.39 × 10⁹ min⁻¹ and 8.80 × 10⁷ min⁻¹. According to the master-plots method, it was found that the first stage followed the fourth-order (F4) model, while the second stage was described by the second-order (F2) model. Based on the statistical evaluation, the devolatilization behaviors reconstructed from overall kinetic expression agree reasonably well with the experimental data, proving its practical importance for designing a pyrolytic processing system using anaerobic sewage sludge as raw material. This study contributes by providing useful insights that can be applied to a large-scale biorefinery as a critical step towards producing biofuels coupled to municipal wastewater treatment in an environmentally sustainable manner.

通过将生化和热化学处理与市政废水处理相结合，可以找到生产有价值的生物精炼产品的新机会。这项研究是第一个通过在多步固态过程的框架内对典型的巴西厌氧污水污泥进行热解来评估动力学三重态和热力学参数的研究。厌氧污水污泥的理化特性与低阶煤的相当。通过非等温热重分析法在不同的加热速率（10、25、50和90 K min ^-1下）分析热解特性）在惰性气氛中。活性热解区有两个脱挥发分阶段，平均质量损失为47.56 wt％（总和），范围为398-953K。对于每个脱挥发分阶段，三种同转化方法（Flynn-Wall-Ozawa，Kissinger-Akahira –Sunose和Starink）用于计算活化能，然后应用补偿效应法求出指数前因数。计算出的第一阶段的平均活化能为113.7至117.3 kJ mol ^-1，第二阶段为115.7至121.9 kJ mol ^-1，分别具有7.39×10 ⁹ min ^-1和8.80×10的指数前因子。⁷分钟^-1。根据主图方法，发现第一阶段遵循四阶（F4）模型，而第二阶段由第二阶（F2）模型描述。基于统计评估，从整体动力学表达式重建的脱挥发分行为与实验数据吻合得很好，证明了其对于设计以厌氧污泥为原料的热解工艺系统的实际意义。这项研究通过提供有用的见解做出了贡献，这些见解可应用于大规模的生物精炼厂，是朝着以环境可持续的方式生产与市政废水处理相结合的生物燃料迈出的关键一步。