垃圾渗滤液处理工艺运行参数优化与技术比较  

Parameter optimization and technology comparison for landfill leachate treatment

作　　者：任智慧 李彦明[2] 李花粉[2] 杨奋翮 

机构地区：[1]北京市海淀区环境卫生服务中心,北京100194 [2]中国农业大学资源与环境学院,北京100193

出　　处：《环境工程学报》2012年第10期3493-3498,共6页Chinese Journal of Environmental Engineering

基　　金：国家"十一五"科技支撑计划资助项目(2008BADC4B17)

摘　　要：垃圾渗滤液是公认的一种成分复杂且难以处理的高浓度有机废水,笔者在北京市海淀区六里屯垃圾填埋场通过2007—2010年垃圾渗滤液处理的工程实践,以COD和氨氮的去除率为指标,研究了不同的垃圾渗滤液处理工艺组合,以及不同运行参数条件下对垃圾渗滤液的处理效果。结果表明,在中温UASB和A/O的平均水力停留时间(HRT)缩短1/3的情况下,通过改进A/O段曝气方式,优化系统的pH、DO等运行参数,用MBR替代絮凝工艺,使整个组合工艺对COD的年平均去除率达到了94.3%,氨氮的去除率维持在99.5%以上,出水氨氮稳定在10 mg/L以内,而改造前的COD与氨氮的年平均去除率仅为82.2%与55.3%。与改造前的UASB+A/O+絮凝工艺组合相比,改造后的UASB+A/O+MBR工艺组合具有更高的污染物去除能力、更好的抗缓冲性和稳定性。Landfill leachate is a high-strength wastewater that may contain high concentrations of organic and inorganic matter.In this study,the operating parameters and removal efficiency for COD and ammonia nitrogen（NH＋4-N） were compared for two different treatment chains and operating parameters at the Liulitun landfill leachate system during 2007 and 2010.In 2007,before improvement,the removal of COD and NH＋4-N in the treatment chain of a mesophilic UASB＋A/O＋ flocculation were 62%～97% and 18%～74%,respectively.The process was changed by reducing the hydraulic retention time by 1/3,adjustment of A/O aeration method,optimization of operating parameters such as pH and DO,and by replacing the flocculant used by MBR.Over a period of 1 year,these changes resulted in a COD removal of 81%～99%,and NH＋4-N removal of 99.5%.The effluent content of NH＋4-N was less than 10 mg/L.These results indicate that optimization of UASB＋A/O＋MBR processes can have a profound effect on system performance allowing shorter treatment periods and easy management while substantially reducing COD and NH＋4-N.

关 键 词：渗滤液 COD 氨氮 去除率 

分 类 号：X705[环境科学与工程—环境工程]