脱水浓缩污泥热脱附中多环芳烃风险削减研究  

Study on the reduction of polycyclic aromatic hydrocarbon risks during thermal desorption of dewatered concentrated sludge

作　　者：殷林剑 林媛 王庚 张举 程海峰 YIN Linjian;LIN Yuan;WANG Geng;ZHANG Ju;CHENG Haifeng(School of Environment and Energy Engineering,Anhui Jianzhu University,Hefei Anhui 230601;Institute of Energy Conservation,Anhui Jianzhu University,Hefei Anhui 230009;General Institute of Architectural Design and Research,Anhui Jianzhu University,Hefei Anhui 230009)

机构地区：[1]安徽建筑大学环境与能源工程学院,安徽合肥230601 [2]安徽建筑大学节能研究院,安徽合肥230009 [3]安徽建筑大学建筑设计研究总院,安徽合肥230009

出　　处：《环境污染与防治》2024年第8期1091-1096,1102,共7页Environmental Pollution & Control

基　　金：安徽省中央引导地方科技发展专项资金项目(No.201907d07050009);安徽省自然科学基金资助项目(No.2108085ME185);安徽省教育厅项目(No.KJ2020A0463)。

摘　　要：将脱水浓缩污泥作为研究对象,利用风险熵等方法针对性分析污泥中16种多环芳烃(PAHs)在热脱附前后的组成和生态风险变化,并分析其主要影响因素。结果表明,随着热脱附温度的升高,污泥粒径呈先增大后减小趋势。在200、300、400、500℃下热脱附稳定45 min,PAHs热脱附效率分别为81.67%、99.32%、99.55%和99.53%;热脱附温度为300℃时,热脱附稳定15、30、45 min,PAHs的热脱附效率分别为91.09%、97.00%和99.32%。300~500℃下热脱附稳定45 min后绝大多数PAHs可达到无风险。控制热脱附温度和稳定时间,可以有效降解污泥中的PAHs,降低其生态风险。Dewatered concentrated sludge was conducted to analyze the component and ecological risk changes of 16 polycyclic aromatic hydrocarbons(PAHs)in sludge before and after thermal desorption,and explore the factors influencing the reduction using methods such as risk entropy.Results showed that with the increase of thermal desorption temperature,the particle size of sludge initially increased and then decreased.After thermal stabilization treatment of 45 min under 200,300,400 and 500℃,the thermal desorption efficiencies of PAHs in sludge were 81.67%,99.32%,99.55%and 99.53%respectively.Under 300℃,after 15,30 and 45 min of thermal stabilization treatment,the thermal desorption efficiencies of PAHs were 91.09%,97.00%and 99.32%,respectively.Most PAHs components could be risk-free after 45 min of thermal desorption stabilization at 300-500℃.As a result,PAHs in sludge could be effectively degraded and its ecological risk reduced by controlling the temperature and duration of thermal desorption process.

关 键 词：脱水浓缩污泥 热脱附 多环芳烃 生态风险 

分 类 号：X703[环境科学与工程—环境工程]