Laboratory of Biomass and Bioprocessing Engineering, College of Engineering, China Agricultural University, Beijing 100083, PR China.
Laboratory of Biomass and Bioprocessing Engineering, College of Engineering, China Agricultural University, Beijing 100083, PR China.
Waste Manag. 2019 Apr 1;88:85-95. doi: 10.1016/j.wasman.2019.03.025. Epub 2019 Mar 20.
Slow pyrolysis and hydrothermal carbonization (HTC) of organic wastes for char preparation has been proved as an effective way for livestock manure management. Livestock manure chars were prepared by slow pyrolysis (400, 500, 600 °C) and hydrothermal carbonization (180, 210, 240 °C) at different reaction temperatures. The influences of manure type and reaction condition to element content, calorific value, char yield, energy yield, and combustion characteristic were investigated. The results illustrate that thermochemical process can strongly affect the properties of pyrolytic char and hydrochar. Compared to pyrolytic char, the hydrochar had higher heating value, higher energy yield, and lower ash content with respect to the same feedstock. The livestock manure type could also influence the properties of biochars/hydrochars. Hydrochars from swine manure, broiler litter, and layer chicken litter achieved the highest energy yield of 65.5%, 56.9%, and 64.4% at 210 °C. Dairy cattle manure and beef cattle manure displayed higher energy yield and higher comprehensive combustibility index than other manures. Furthermore, HTC can narrow the weight loss temperature range in differential thermogravimetric curve of manures. Therefore, HTC is considered as a more effective approach in carbonizing animal manure for solid biofuel compared to slow pyrolysis.
有机废物的慢速热解和水热碳化（HTC）已被证明是一种有效的家畜粪便管理方法。通过在不同反应温度下进行慢速热解（400、500、600°C）和水热碳化（180、210、240°C），制备了家畜粪便炭。研究了粪便类型和反应条件对元素含量、热值、炭产率、能量产率和燃烧特性的影响。结果表明，热化学过程会强烈影响热解炭和水炭的性质。与热解炭相比，对于相同的原料，水炭具有更高的热值、更高的能量产率和更低的灰分含量。家畜粪便类型也会影响生物炭/水炭的性质。来自猪粪、肉鸡垫料和蛋鸡垫料的水炭在 210°C 时达到了 65.5%、56.9%和 64.4%的最高能量产率。奶牛粪便和肉牛粪便的能量产率和综合燃烧性指数均高于其他粪便。此外，HTC 可以缩小粪便差示热重曲线中重量损失温度范围。因此，与慢速热解相比，HTC 被认为是一种更有效的碳化动物粪便生产固体生物燃料的方法。
