邓玉营,黄振兴,阮文权,缪恒峰,赵明星,任红艳.沼液回流比与有机负荷对秸秆厌氧发酵特性的影响[J].农业机械学报,2016,47(11):198-206.
Deng Yuying,Huang Zhenxing,Ruan Wenquan,Miao Hengfeng,Zhao Mingxing,Ren Hongyan.Effect of Digestate Recirculation Ratio and Organic Loading Rate on Fermentation Characteristics for Anaerobic Digestion of Straw[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(11):198-206.
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沼液回流比与有机负荷对秸秆厌氧发酵特性的影响   [下载全文]
Effect of Digestate Recirculation Ratio and Organic Loading Rate on Fermentation Characteristics for Anaerobic Digestion of Straw   [Download Pdf][in English]
投稿时间:2016-08-04  
DOI:10.6041/j.issn.1000-1298.2016.11.027
中文关键词:  秸秆  厌氧发酵  沼液回流比  有机负荷  发酵特性
基金项目:国家自然科学基金项目(21276114、21506076)和“十二五”国家科技支撑计划项目(2014BAC25B01)
作者单位
邓玉营 江南大学
常州工程职业技术学院 
黄振兴 江南大学 
阮文权 江南大学 
缪恒峰 江南大学 
赵明星 江南大学 
任红艳 江南大学 
中文摘要:以混合秸秆为唯一原料,混合接种瘤胃液与污泥,在半连续固态进料反应器中研究不同回流比和有机负荷组合对甲烷产率、发酵特性的影响。结果表明,在6个阶段中,当有机负荷(OLR)为4g/(L·d),回流比为1∶1时,甲烷平均产率达到了768mL/(L·d);单位秸秆TS产甲烷量为202mL/g,具有明显成本优势。当OLR升高到6g/(L·d)时,VFA积累明显,丙酸质量浓度高达6.54g/L,并且出现丁酸的积累;该阶段氨氮质量浓度明显升高,达到了632.51mg/L。固渣中纤维素和半纤维素在第2阶段降解程度最高,降解率达到了88.81%,而水解酶活和产甲烷效率的变化相关。通过三维荧光光谱分析,发现沼液中类酪氨酸产物、辅酶F420及腐殖酸类有机物的变化受回流比和有机负荷的影响,能直接反映产甲烷和发酵特性,而且腐殖酸类物质的积累是产甲烷作用受到抑制的重要原因。因此,合适的回流比和有机负荷对秸秆沼气工程长期稳定运行尤为关键。
Deng Yuying  Huang Zhenxing  Ruan Wenquan  Miao Hengfeng  Zhao Mingxing  Ren Hongyan
Jiangnan University;Changzhou Vocational Institute of Engineering Technology,Jiangnan University,Jiangnan University,Jiangnan University,Jiangnan University and Jiangnan University
Key Words:straw  anaerobic fermentation  digestate recirculation ratio  organic loading rate  fermentation characteristics
Abstract:After co inoculation of rumen fluid with sludge, the methanogenic efficiency and anaerobic fermentation characteristics of straw which were influenced by combination of different digestate recirculation ratios and organic loading rates (OLR) at six stages, were studied in a semi continuous reactor with solid feeding device. The results showed that methane yield reached 768mL/(L·d) at4g/(L·d) of OLR and 1∶1 of digestate recirculation ratio. Methane production was 202mL/g (217mL/g) at this stage, which had obvious cost advantage. However, VFAs were accumulated significantly with propionate concentration being as high as 6.54g/L while ammonia nitrogen concentration reached 63251mg/L at 6g/(L·d) of OLR. Degradation degree of cellulose and hemicellulose in solid residues reached 88.81% at phase 2 whereas hydrolytic activities correlated with methanogenic efficiency. Through the analysis of three dimensional fluorescence spectrum, it was found that dissolved organic matters of tyrosine like component, coenzyme F420 and humic acid were affected by digestate recirculation ratio and OLR. The changes of the components could directly reflect the methane producing activities and fermentation characteristics. Moreover, accumulation of humic acid was responsible for decrease of methanogenic activity. Therefore, proper digestate recirculation ratio and OLR were indispensable to long term stable operation of biogas engineering from straw by avoiding the accumulation of harmful components in liquid digestate.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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