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1、矿物材料预处理对餐厨垃圾高温厌氧消化过程的影响马磊1,王德汉1*,王梦男2,文伟发3,曾彩明1,邱国伟2,江成坤2(1华南农业大学资源环境学院环境科学与工程系,广东广州510642;2华南农业大学资源环境学院广东广州510642;3广东农业科学院土壤肥料研究所,广州510640)收稿日期:2007-11-20修回日期:录用日期:摘要:选用4种矿物材料对400g餐厨垃圾进行在35℃下进行4h好氧预处理,比较了预处理前后餐厨垃圾水解率的变化,并且详细研究了预处理对餐厨垃圾高温厌氧消化过程及产沼气效果的
2、影响。结果表明:在同等条件下,添加矿物材料可以有效促进餐厨垃圾的水解,其中添加1.25%(质量分数,以餐厨垃圾湿基计)膨润土和添加2.5%轻烧MgO的处理水解率分别达到了96.79%和96.51%。轻烧MgO有效地缓解了餐厨垃圾由于酸化引起的pH值下降,使产气高峰期较早来到而总产气量上添加白云石粉的促进作用显著,膨润土次之,其中添加2.5%白云石粉的处理产气量最高,为10925mL。添加矿物材料降低消化液中钠离子的浓度,可减轻对产甲烷细菌的抑制作用。关键词:矿物材料;预处理;餐厨垃圾;厌氧消化;文
3、章编号:中图分类号:文献标识码:AEffectofpretreatedbymineralsonthermophilicanaerobicdigestionoffoodwasteMALei1,WANGDehan1*,WANGMengnan2,WENWeifa3,ZENGCaiming1,QIUGuowei2,JIANGChengkun2(1DepartmentofEnvironmentalScience&Engineering,CollegeofResourcesandenvironment,Sou
4、thChinaAgriculturalUniversity,Guangzhou,510642,China;2CollegeofResourcesandenvironment,SouthChinaAgriculturalUniversity,Guangzhou,510642,China;3InstituteofSoilandFertilizerGuangdongAcademeofAgriculturalSciences,Guangzhou,510640,China)Received20Novembe
5、r2007;receivedinrevisedform;acceptedAbstract:Foodwastes400gwerepretreatedaerobicallybyfourdifferentmineralsforfourhoursatthetemperatureof35℃.Theeffectsofdifferentmineralsonhydrolysisrateandtheeffectofpretreatmentonthermophilicanaerobicdigestionwerestu
6、diedindetail.Theresultsshowedthatthehydrolysisoffoodwasteswasacceleratedwiththeadditionofmineralsunderthesamecondition.Thehydrolysisrateswere96.79%and96.51%withtheadditionof1.25%(w/w,basedon400gfoodwastes)bentoniteand2.5%light-burnedmagnesia,respectiv
7、ely.ThedecreaseofpHvalueduetoacidificationwascontrolledwiththeadditionoflight-burnedmagnesiaandtheaerogenicalfastigiumarrivedearlier.Thehighestpromotionwasobservedinthetreatmentwiththeadditionofburneddolomiteconsideringthetotalbiogasproduction,followe
8、dbybentonite.Thegreastestbiogasproductionwas10925mLwiththeadditionof2.5%burneddolomite.Moreover,theinhibitingabilityofsodiumtomethanogenswasmitigatedwiththedecreasedconcentrationsofsodiumionbyaddingmineralstothedigestionsystem.Keywords:mineral