我国城市污水厂污泥厌氧消化系统的运行现状

我国城市污水厂污泥厌氧消化系统的运行现状我国城市污水厂污泥厌氧消化系统的运行现状吴静,姜洁,周红明,毕蕾(清华大学环境模拟与污染控制国家重点联合实验室,北京100084)摘要:对我国400余座城市污水厂污泥处理工艺的调查表明,目前采用污泥厌氧消化工艺的仅46家,主要采用浓缩/中温厌氧/脱水工艺,采用一级厌氧消化和二级厌氧消化的厂家数量接近,其中仅25家的污泥消化系统正在运行,沼气产量约为14×104m3/d,另有6家在调试。污泥厌氧消化工艺在实际应用中仍存在着较多亟待解决的问题,沼气产率低和利用率不高大大削弱了该工艺的优势。关键词:城市污水厂;污泥处理;厌氧消化;沼气中图分类号:X703.1文献标识码:B文章编号:1000-4602(2008)22-0021-04CurrentOperationStatusofSludgeAnaerobicDigestionSysteminMunicipalWastewaterTreatmentPlantsinChinaWUJing,JIANGJie,ZHOUHong2ming,BILei(StateKeyJointLaboratoryofEnvironmentSimulationandPollutionControl,TsinghuaUniversity,Beijing100084,China)Abstract:Theresultsoftheinvestigationonsludgetreatmentsystemsover400municipalwastewatertreatmentplantsinChinashowthatonlyabout46plantshavesludgeanaerobicdigestionsys2tems,mostofwhichadoptthickening/mesophilicanaerobicdigestion/dewateringprocess.Abouthalfoftheplantshaveone2stageanaerobicdigestionsystemsandtheotherhalfhavetwo2stageanaerobicdiges2tionsystems.Forthe46plants,only25plantsoperatetheiranaerobicdigestionsystemsandp