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时间:2019-11-26
《餐厨垃圾堆肥理化特性变化规律研究》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、维普资讯http://www.cqvip.com环境科学研究第20卷第2期ResearchofEnvironmentalSciencesVo1.20,No.2,2007餐厨垃圾堆肥理化特性变化规律研究杨延梅,席北斗,刘鸿亮。,魏自民,杨志峰,张相锋1.北京师范大学环境学院,北京1008752.重庆交通大学,重庆4000743.中国环境科学研究院,北京100012摘要:餐厨垃圾主要包括厨余和泔脚,二者的化学组成、物料结构以及初始微生物量均存在差异.对厨余和泔脚分别与相同质量比的木屑混合堆制的一次好氧堆肥过程进行了比较研究.结果表明,在相
2、同好氧堆肥条件下,二者的特性变化不同:与厨余堆肥系统相比,泔脚堆肥系统初始水溶性(C)1w(N)高,堆肥pH较低,高温持续时间长,C02释放率高,NH,挥发少,氮素损失低,堆制后堆肥含氮量升高;但泔脚一次堆肥所需时间偏长,应采取有效方法加速其堆肥进程.厨余堆肥系统升温快,堆肥周期短,但生物可利用碳的短缺造成系统氮素损失量大,可采用在厨余堆肥中添加适当碳源等措施来减少氮素损失.关键词:堆肥;餐厨垃圾;理化特性;变化规律中图分类号:X701文献标识码:A文章编号:1001—6929(2007)02—0072—06StudyontheCha
3、ngeofPhysicochemicalCharacteristicsofFoodWastesDuringAerobicCompostingYANGYan.mei,XIBei.dou。,LIUHong.1iang'。,WEIZi.rnin2,YANGZhi.feng,ZHANGXiang·feng1.SchoolofEnvironment,BeijingNormalUniversity,Beijing100875,China2.ChongqingJiaotongUniversity,Chongqing400074,China3.Chi
4、neseResearchAcademyofEnvironmentalSciences,Bering100012,ChinaAbstract:,Foodwastesweregenerallyclassifiedintopre—consumerfoodwastesandpost—consumerfoodwastes.Thesetwotypesoffoodwastesweredifferentespeciallyinchemicalcomposition,materialstructureandinitialmicrobialbiomass
5、.Theaerobiccomposts,whichmixedpre—consumerfoodwasteandpost—consumerfoodwastesrespectivelywithsameamountofsawdust,werecompared.Theresultindicatedthattheyhavediferentcharacteristicunderthesameconditionsofaerobiccompostprocess.Comparedtopre—consumerfoodwastes,thepost—consu
6、merfoodwastescompostinghadhigherwatersolubilitycarbontonitrogenratios,lowerpHofthecompostmaterial,longerlastingtimeofhightemperaturephase,higherdischargeofC02,lowerlossofnitrogenandincreasednitrogencontentofmaterialaftercomposing.Howeverpost—consumerfoodwastescomposting
7、costmoretime,andeffectivemethodshouldbetakentoacceleratecompostprocess.Thepre—consumerfoodwastescompostingcanincreaseitstemperaturerapidlyandshortenedcompostingtime,butthelackofavailablecarboncausedmorelossofnitrogenofthepre-consumerfodwastescomposting.Thelossofnitrogen
8、Canbereducedbyaddingappropriatecarbontopre—consumerfoodwastes.Keywords:composting;foodwastes;physicochemicalch
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