牲畜粪便与秸秆混合的厌氧发酵效果及影响因素分析.pdf

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1、农业环境科学学报2011，30(12)：2594—2601JournalofAgro-EnvironmentScience牲畜粪便与秸秆混合的厌氧发酵效果及影响因素分析王晓娇L2，杨改河·¨-，冯永忠L2，任广鑫L2，韩新辉L2，宋籽霖2(1．西北农林科技大学农学院，陕西杨凌712100；2．陕西省循环农业工程技术研究中心，陕西杨凌712100)摘要：为进一步明确混合原料厌氧发酵效果及影响因素，以牛粪、鸡粪和麦秆为发酵原料，按总固体质量比分别设定了单一原料、两种及3种原料混合发酵组，分别在20℃和35

2、℃下进行厌氧消化试验，研究了原料不同比例混合、温度、C／N比和口H值对厌氧发酵效果的影响。结果表明，原料混合发酵可显著提高总产气量、偈利用率和鸭产气率；牛粪、鸡粪和麦秆3种原料混合后发酵效果显著好于单一原料以及牛粪与麦秆、鸡粪与麦秆两种原料混合的发酵效果。中温发酵效果显著好于低温发酵；牛粪、鸡粪与麦秆混合厌氧发酵的最适C／N比为25．64—27．54；混合原料发酵的pH值变化平稳且更容易维持在发酵适宜pH范围内。原料混合、温度、c／N比和DH值对厌氧发酵均有影响。关键词：混合；厌氧发酵；温度；C／N比

3、；pH值中图分类号：$216．4文献标志码：A文章编号：1672—2043(2011)12—2594-08AnaerobicCo-digestionEffectsofManureandStrawandAnalysisofInfluencingFactorsWANGXiao-jia01‘YANGGai-he。≯，FENGYong-zhong”，RENGuang-xin”，HANXin-huil‘SONGZi—lin2(1CollegeofAgronomy，NorthwestA&FUniversity，Y

4、angling712100，China；2．ResearchCenterofRecycleAgriculturalEngineeringandTechnologyofShannxiProvince，Yangling712100，China)Abstract：Inordertoinvestigatetheeffectsofanaerobicco-digestionandrelatedinfluences，selectedrawmaterials，COWdung，chickennla—nureandstr

5、aw．weredividedintogroupswithsingleandmixtureoftwoorthreekindsofmaterialsaccordingtotheproportionoftotalsolidconcentration．Theexperimentswereconductedat20℃and30℃，andtheeffectsofmixture，temperature。C／Nratio．pHandonanaerobicco-digestionwerestudied．Theresul

6、tsindicatedthatanaerobicco-digestioncouldsignificantlyimprovethetotalgasvolume，theutilizationratioandefficiencyofTSafterfermentation；andtheeffectsofco-digestionofthreetypesofrawmaterials—COWdung，chickenmanureandstrawWagsignificantlybetterthanthoseofthes

7、ingledigestionandco-digestionoftwokindsofmaterials．TheeffectofCO—digestionatmeso—spherictemperatureW88greatlybetterthanthatateryophilietemperature；theC／NratioandpHofthemixedrawmaterialswereaeeommodat—edintoafeasiblescopetoimprovetheeffectsofCO—digestion

8、；theoptimalCfNratioofthreetypesofrawmaterialswas25．64～27．54；thechangeofthepHvalueofthemixedraWmaterialsintheco-digestionwasstableanditwaseasiertomaintaininoptimumpHrangeduringfermentation．Mixture，temperature,C／NratioandpHwereallm