Abstract: With accelerated urbanization，urban population has increased and concentrated，increasing city night soil output. The kinetics characteristics of urban night soil pyrolysis process was studied with thermogravimetric （TG） and derivative thermogravimetry （DTG） analyses，compared with other 3 types of typical manure （cow manure，chicken litter and pig manure）. The mass loss mainly occurred in a temperature range of 205℃ to 525℃. The corresponding temperatures with the largest weight loss ratio of four samples were similar，but the pyrolysis process finish temperature of urban night soil was higher than those of others. The pyrolysis kinetics parameters were obtained by establishing first-order two-component stagewise kinetics model and calculated with the Coast-Redfern method. The weighted activation energy of urban night soil was lower than that of cow manure，but higher than those of chicken litter and pig manure.

Key words: night soil, pyrolysis, thermo analysis, kinetics, activation energy

摘要： 随着国家相关标准的细化和执行，城市粪便（收集自化粪池及旱厕）的无害化处理正受到越来越多关注。本文利用热重-微商热重分析（TG-DTG）对我国北方典型城市粪便热解特性进行了研究，并与3种常见动物粪便（猪粪、牛粪、鸡粪）的热解行为进行了对比。城市粪便的热解过程温度主要集中在205～525℃。城市粪便的最大失重温度与其余三种动物粪便较为接近，但热解结束温度高于其他三种样品。利用试验所得数据，采用Coats-Redfern法处理并计算不同生物质在相应热解条件下的反应动力学参数，结果显示城市粪便热解适合采用一级双组分分阶段反应模型。与动物粪便相比，城市粪便热解所需活化能低于牛粪，但高于鸡粪和猪粪。

关键词: 城市粪便, 热解, 热分析, 动力学, 活化能