γ辐照联合曝气处理改善污泥脱水性能的研究  

Study on the improvement of sludge dewaterability by gamma ray radiation and aeration treatment

作　　者：凌永生[1,2] 张皓嘉 贾文宝[1,2] 黑大千[1,2] 单卿[1,2] 程璨[1,2] 侯闻宇 

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京211100 [2]江苏省高校放射医学协同创新中心,江苏苏州215123

出　　处：《工业水处理》2015年第6期46-50,共5页Industrial Water Treatment

基　　金：国家自然科学基金项目(11405086);国家重大科学仪器设备开发专项项目(2013YQ040861)

摘　　要：采用60Coγ射线辐照预处理城市污水处理厂剩余污泥,通过污泥比阻的变化,研究了辐照中污泥p H、辐照剂量以及曝气处理对污泥脱水性能的影响。结果表明:在γ辐照预处理中,当p H为7左右时,污泥比阻最低,污泥脱水性能最佳;随着辐照剂量的升高,污泥中可溶性有机组分和氨氮含量逐渐增大,污泥比阻降低,污泥脱水性能随之改善;经曝气处理后进行辐照,能进一步降低污泥比阻,显著改善污泥脱水性能。污泥比阻的变化服从一级反应动力学方程。The residual sludge from an urban sewage treatment plant has been pre-treated by60 Co γ-rays irradiation.Through the changes of specific resistance of sludge,the effects of sludge p H,and radiation dosage during radiation,as well as the aeration treatment,on sludge dewaterability are studied. The results indicate that the specific resistance of sludge reaches the lowest and sludge dewaterability is the highest,when the p H is about 7 during radiation. The soluble organic components and ammonia-nitrogen component in sludge increase gradually with the increase of radiation dosage. The sludge dewaterability can be improved with the decrease of specific resistance of sludge. The results also show that radiation is conducted after aeration treatment,the specific resistance of sludge could be further reduced,and the sludge dewaterability could be improved significantly. The changes of specific resistance of sludge comply with the first order reaction kinetics equation.

关 键 词：Γ辐照 曝气处理 污泥 脱水性能 

分 类 号：X703.1[环境科学与工程—环境工程]