环境工程学报2012，Vol.6Issue(11)：4209-4214,6.
热解温度和时间对污泥生物碳理化性质的影响
Effect of pyrolysis temperature and duration on production and nutrient properties of sludge biochar
摘要
Abstract
Conversion of sludge to biochar through pyrolysis is one of the environmental friendly ways to treat wastewater sludge.The aim of this work is to investigate the effect of pyrolysis temperature and duration on production of wastewater sludge biochar and evaluate the properties required for agronomic applications.Wastewater sludge collected from a sewage treatment plant in Xiamen was pyrolysed in laboratory scale reactor.The result showed that by increasing the pyrolysis temperature(over the range from 300℃ to 700℃) or duration(over the range from 2 hours to 4 hours) the yield of biochar decreased.Biochar produced at low temperature was acid while at high temperature it was alkaline.The concentration of nitrogen in biochar was found to decrease whereas P,K and micronutrients increased with the increasing pyrolysis temperature or duration.The result of DTPA extraction showed that the high temperature pyrolysis reduced bioavalability of trace elements.关键词
剩余污泥/生物碳/热解/营养元素Key words
excess sludge/biochar/pyrolysis/nutrient分类
资源环境引用本文复制引用
程国淡,黄青,张凯松..热解温度和时间对污泥生物碳理化性质的影响[J].环境工程学报,2012,6(11):4209-4214,6.基金项目
科技部国际科技合作项目 （）
国家“水体污染控制与治理”科技重大专项 （）
