资源描述：
《餐厨垃圾湿热处理对其脱出液的影响》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、第22卷第3期中国给水排水Vo.l22No.32006年2月CHINAWATER&WASTEWATERFeb.2006餐厨垃圾湿热处理对其脱出液的影响1,2111任连海,聂永丰,刘建国,金宜英(1.清华大学环境科学与工程系,北京100084;2.北京工商大学化学与环境工程学院,北京100037)摘要:为探明湿热处理后餐厨垃圾脱出液水质、水量的变化规律,有效提高其处理效率,对不同湿热条件下单位餐厨垃圾脱水量、脱出液的pH、总悬浮固体(SS)、溶解性COD(
2、SCOD)、氮的存在形式及其浓度、油脂含量的变化规律进行了试验研究。结果表明,随着温度的上升和加热时间的延长,餐厨垃圾脱出液pH值有所下降,并且在温度达180、加热时间为40min时pH<4.5,故在生物处理前需进行调节;湿热处理使餐厨垃圾脱出液的SCOD值大幅上升,180下加热100min后达最高值(为211400mg/L);湿热处理使SS值呈下降趋势;湿热处理初期有机氮浓度增加,达到180且加热时间>60min后有机氮开始向氨氮转化。另外,湿热处理使餐厨脱出液的可浮油含量增加,有利于废油脂的分离、回收。关
3、键词:餐厨垃圾;脱出液;湿热处理;温度;加热时间中图分类号:X703.1文献标识码:C文章编号:1000-4602(2006)03-0073-04ImpactofHydrothermalProcessonEffluentofRestaurantGarbage1,2111RENLian-hai,NIEYong-feng,LIUJian-guo,JINY-iying(1.DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity
4、,Beijing100084,China;2.CollegeofChemicalandEnvironmentalEngineering,BeijingTechnologyandBusinessUniversity,Beijing100037,China)Abstract:Inordertodemonstratethevariationgeneralizationofqualityandquantityoftherestau-rantgarbageeffluentafterhydrothermalprocess,a
5、ndtoimprovethetreatingefficiency,theexperimentalresearchwasconductedbymeansofanalyzingthevariationoftheeffluentquantityfromrestaurantgar-bage,thepH,suspendedsolid(SS),anddissolvedchemicaloxygendemand(SCOD),theoccurrenceofthenitrogenanditsconcentration,thefloatab
6、leoilcontentintherestaurantgarbageeffluen.tThere-sultshowsthatthepHdecreasesapproximatelyasthetemperaturerisesandtheheatingtimeincreases.Andwhenthetemperaturereaches180,heatingfor40minutes,thepHoftheeffluentbecomeslessthan4.5,whichmakeseffluentrequiretobecondit
7、ionedinbiologicaltreatmentsystem.TheSCODoftheeffluentincreasesgreatlyafterhydrothermalprocess,whilethehighestvalueappearswhenthegar-bageisbeingheatedat180for100minutes,whichreaches211400mg/L.Furthermore,theSSoftheeffluentdecreasesthroughhydrothermalprocess.More
8、over,theorganicnitrogenconcentrationincrea-sesatthebeginningofhydrothermalprocess,whenthetemperatureandheatingtimereaches180and60minutesrespectively,theorganicnitrog
