工艺措施对猪粪秸秆混合厌氧干发酵产气性能的影响

为避免挥发性脂肪酸积累、提高产气效率,研究猪粪单独发酵、猪粪秸秆混合发酵、猪粪秸秆混合原料分层接种和猪粪秸秆混合原料渗滤液回流等工艺措施下,中温（37℃）厌氧干发酵（总固体含量为20%）的产酸及产气性能。结果表明：猪粪秸秆混合原料分层接种厌氧发酵启动快,产气效果最佳,累积挥发性固体含量VS产甲烷量可达139.2mL/g;混合发酵渗滤液回流可有效降低总挥发性脂肪酸（total volatile fatty acids,TVFAs）质量浓度（维持在0.66 mg/g）,累积VS产甲烷量比分层接种低16.7%;猪粪秸秆混合发酵与猪粪单独发酵的反应器中TVFAs质量浓度分别达到19.08和19.83...

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Bibliographic Details
Published in农业工程学报 Vol. 33; no. 11; pp. 233 - 239
Main Author 宋香育 张克强 房芳 孔德望 梁军锋 杜连柱
Format Journal Article
LanguageChinese
Published 沈阳农业大学土地与环境学院,沈阳 110866 2017
农业部环境保护科研监测所,天津,300191%天津环科源环保科技有限公司,天津,300191%农业部环境保护科研监测所,天津 300191
Subjects
分层接种
发酵
挥发性脂肪酸
渗滤液回流
秸秆
粪
秸秆
渗滤液回流
分层接种
layered seeding
挥发性脂肪酸
manures
fermentation
粪
VFAs
leachate recycling
straw
发酵
Online AccessGet full text
ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2017.11.030

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Summary:为避免挥发性脂肪酸积累、提高产气效率,研究猪粪单独发酵、猪粪秸秆混合发酵、猪粪秸秆混合原料分层接种和猪粪秸秆混合原料渗滤液回流等工艺措施下,中温（37℃）厌氧干发酵（总固体含量为20%）的产酸及产气性能。结果表明：猪粪秸秆混合原料分层接种厌氧发酵启动快,产气效果最佳,累积挥发性固体含量VS产甲烷量可达139.2mL/g;混合发酵渗滤液回流可有效降低总挥发性脂肪酸（total volatile fatty acids,TVFAs）质量浓度（维持在0.66 mg/g）,累积VS产甲烷量比分层接种低16.7%;猪粪秸秆混合发酵与猪粪单独发酵的反应器中TVFAs质量浓度分别达到19.08和19.83 mg/g,前15 d日产甲烷量为0.1 mL/（g·d）,基本不产气。通过不同工艺措施对比,获得产气量最高和启动期最快的发酵方式,提高猪粪厌氧干发酵产气效率,为猪粪等高固体含量有机废弃物的资源化处理利用提供参考。
Bibliography:manures; straw; fermentation; VFAs; leachate recycling; layered seeding
11-2047/S
Solid-state anaerobic digestion has advantages of water conversation,convenient management and low energy consumption in winter.After the digestion,substrate contains low water and can be easily treated,thereby achieving zero emission.Under the condition of increasingly scarce water resource in the world,this technology conforms to the demand of resource utilization and water conversation.However,the process of solid-state anaerobic digestion was very complex and the solid-state anaerobic digestion of pig manure could easily lead to serious accumulation of volatile fatty acids（VFAs）,which was the main inhibiting factor in solid-state anaerobic digestion of pig manure.Due to the low water content,the reaction of solid-state anaerobic digestion could not proceed normally,or even be ceased.Several measures could be used to minimize the accumulation of VFAs.Leachate recycling was one way to accelerate mass transfer rate,and proper rec
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2017.11.030