Shinogi Yoshiyuki, Kanri Yutaka
National Institute for Rural Engineering, 2-1-6 Kannondai, Ibaraki 305-8609, Tsukuba, Japan.
Bioresour Technol. 2003 Dec;90(3):241-7. doi: 10.1016/s0960-8524(03)00147-0.
Pyrolysis (carbonization) has been proposed as one of several optional technologies for disposing and recycling waste products in Japan. Plant wastes (sugarcane bagasse and rice husks), animal waste (cow biosolids) and human waste (treated municipal sludge) were pyrolyzed at temperatures from 250-800 degrees C in closed containers. The carbonized materials were evaluated for specific physical properties (yield, surface area, density) and specific chemical properties (total carbon, total nitrogen, pH, fixed carbon, ash content, volatility) in order to compare differences in properties among the four waste products. The results indicated that (1) surface area, total carbon, ash content and pH increased as the carbonization temperature increased, while carbonization yield decreased with increasing temperature, (2) product density however was not affected by temperature and (3) correlation coefficients were determined among the physical and chemical properties and several significant correlations were observed. The data indicate that source material had considerable influence on the physical and chemical properties of the carbonized products.
热解（碳化）已被提议作为日本处理和回收废品的几种可选技术之一。植物废料（甘蔗渣和稻壳）、动物粪便（牛生物固体）和人类粪便（处理后的城市污泥）在密闭容器中于250至800摄氏度的温度下进行热解。对碳化材料的特定物理性质（产率、表面积、密度）和特定化学性质（总碳、总氮、pH值、固定碳、灰分含量、挥发性）进行评估，以比较四种废品之间的性质差异。结果表明：（1）随着碳化温度升高，表面积、总碳、灰分含量和pH值增加，而碳化产率随温度升高而降低；（2）产品密度不受温度影响；（3）确定了物理和化学性质之间的相关系数，并观察到了几个显著的相关性。数据表明，原料对碳化产品的物理和化学性质有相当大的影响。
