厌氧消化污泥和未消化污泥在TG-MS上的热化学特性比较  

Comparison of thermochemical properties of anaerobic digested sludge and undigested sludge by TG-MS

作　　者：孙颖[1] 许冉[1] 刘仲哲[1] 周吉峙[1] 钱光人[1] 

机构地区：[1]上海大学环境与化学工程学院,上海200072

出　　处：《环境科学学报》2009年第1期169-174,共6页Acta Scientiae Circumstantiae

基　　金：上海市重点科技攻关项目(No.07dz12030);上海市重点学科(第3期)资助(No.S30109)~~

摘　　要：利用热重-质谱联用仪对厌氧消化污泥和未消化污泥的燃烧和热解过程分别进行了研究.结果表明,2种污泥燃烧和热解过程中的热失重行为都可分为失水、有机物分解、无机物分解3个阶段.在300-350℃温度范围内,无论燃烧还是热解过程,未消化污泥有机物分解造成的热失重现象均比厌氧消化污泥明显.无机物分解阶段,厌氧消化污泥主要是碳酸盐的分解,未消化污泥主要是硫酸盐的分解.采用同步质谱仪对热解和燃烧的气态产物进行了分析,结果表明,污泥燃烧和热解过程除了产生大量的H2O和CO2外,热解过程还产生CH4、C2H6、C4H10、C7H8等有机气体以及H2.厌氧消化污泥热解时有机气体产生量小于未消化污泥.Combustion and pyrolysis of anaerobic digested sewage sludge and undigested sewage sludge was investigated under air and nitrogen atmospheres by thermogravimetric -mass spectrometry （TG-MS）. The results showed that the combustion and pyrolysis processes could be divided into three stages： volatilization of water, decomposition of organic substances and decomposition of inorganic substances. At temperatures from 300℃ to 350℃, the decomposition of organic substances of the undigested sludge is more significant than that of the anaerobic digested sludge during both combustion and pyrolysis processes. During the decomposition of inorganic substances, the main decomposed substances for anaerobic digested sludge are carbonates while for undigested sludge they are sulfates. The gaseous products under different conditions were analyzed by coupled simultaneous mass spectrometry. The results showed that a large amount of H2O and CO2 were released during the pyrolysis and combustion processes. During pyrolysis, H2 , CH4, C2H6, C4H10 and CTH8 were detected. The amount of the organic gases emitted from the anaerobic digested sludge was smaller than that from undigested sludge.

关 键 词：污水污泥 热重-质谱 热解 厌氧消化 

分 类 号：X703[环境科学与工程—环境工程]