超声联合低温热水解促进剩余污泥破解和厌氧消化的研究

中国环境科学2016,36(9)：2703~2708ChinaEnvironmentalScience超声联合低温热水解促进剩余污泥破解和厌氧消化的研究徐慧敏1,何国富1*,戴晓虎2,3,象伟宁1,4(1.华东师范大学生态与环境科学学院,上海200241；2.同济大学城市污染控制国家工程研究中心,上海200092；3.同济大学环境科学与工程学院,上海200092；4.上海城市化生态过程与生态恢复重点实验室,上海200241)摘要：为了探索超声和低温热水解预处理技术对剩余污泥厌氧消化性能的影响,进行了单独超声、单独热水解和二者联合的实验研究.以温度和超声能量为控制参数,研究了不同预处理技术对污泥破解度DD(DisintegrationdegreeofSCOD)和有机质溶出的影响.结果表明:联合预处理技术对DD和有机质浓度的增加效果比超声和热水解单独作用之和分别高4.04%、36.62mg/L.DD和实际输入能量之间存在较高的线性相关性(R2=0.977),即在本研究条件下,输入能量越高,污泥破解效果越好.超声和热水解联合预处理后污泥厌氧消化产甲烷量较原泥增加了30.2%~55.4%.DD和厌氧消化性能之间存在二次非线性关系(R2=0.821),且厌氧消化性能最高达到877.76LCH4/kgVSS去除,该峰值出现在超声能量12000kJ/kgTS和热水解温度80℃联合作用条件下.关键词：厌氧消化；低温热水解；超声；剩余污泥；甲烷产率中图分类号：X703.1文献标识码：A文章编号：1000-6923(2016)09-2703-06Theeffectsofcombinedultrasoundandlowtemperaturethermalpretreatmentsondisintegrationandanaerobicdigestionofwasteactivatedsludge.XUHui-min1,HEGuo-fu1*,DAIXiao-hu2,3,XIANGWei-ning1,4(1.CollegeofEcologicalandEnvironmentalScience,EastChinaNormalUniversity,Shanghai200241,China；2.NationalEngineeringResearchCenterforUrbanPollutionControl,Shanghai200092,China；3.CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China；4.ShanghaiKeyLabforUrbanEcologicalProcessesandEco-Restoration,Shanghai200241,China).ChinaEnvironmentalScience,2016,36(9)：2703~2708Abstract：Toexploretheeffectsofultrasoundandlowtemperaturethermalpretreatmentsonanaerobicdigestionofwasteactivatedsludge(WAS),ultrasound,thermal,andcombined(ultrasound+thermal)pretreatmentswereconducted.Takingtemperatureandspecificenergyascontrolparameters,disintegrationdegreeofSCOD(DD)andorganicdisintegrationbeforeandafterpretreatmentsweremeasured.Priortoanaerobicdigestion,combinedpretreatmentsignificantlyimprovedDDandsolubleorganicmatterconcentrationswhichwerebetterthanthesumofultrasoundandthermalpretreatments.Thecombinationofultrasoundandthermalpretreatmentunderspecificenergyof12000kJ/kgTSandtemperatureof80℃,DDandsolubleorganicconcentrationwere4.04%、36.62mg/Lhigherthanthesumofpretreatmentalone.Besides,therewasahighlylinearrelationshipbetweenDDanda