邓媛方,邱凌,王雅君,戴本林,徐继明.低温冻融-酶解预处理对稻秆厌氧发酵产气特性的影响[J].农业机械学报,2017,48(10):260-265.
DENG Yuanfang,QIU Ling,WANG Yajun,DAI Benlin,XU Jiming.Effect of Freeze-thaw and Enzymatic Pretreatment of Rice Straw on Biogas Production by Anaerobic Digestion[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(10):260-265.
摘要点击次数: 2075
全文下载次数: 930
低温冻融-酶解预处理对稻秆厌氧发酵产气特性的影响   [下载全文]
Effect of Freeze-thaw and Enzymatic Pretreatment of Rice Straw on Biogas Production by Anaerobic Digestion   [Download Pdf][in English]
投稿时间:2016-10-24  
DOI:10.6041/j.issn.1000-1298.2017.10.032
中文关键词:  水稻秸秆  低温冻融  酶解  厌氧发酵  产气特性
基金项目:国家自然科学基金项目(51576167)和淮安市重点研发(社会发展)计划项目(HAS201601、HAS201601-3、HAS201601-4)
作者单位
邓媛方 西北农林科技大学
淮阴师范学院 
邱凌 西北农林科技大学 
王雅君 西北农林科技大学 
戴本林 淮阴师范学院 
徐继明 淮阴师范学院 
中文摘要:为利用我国寒冷地区天然冷资源,在实验室模拟低温环境(Z组:-4℃,S组:-20℃),探索低温冻融及纤维素酶液预处理对水稻秸秆中温厌氧发酵产气特性的影响。结果表明,浸泡温度30℃、浸泡时间4h、液固比15mL/g条件下水稻秸秆持水力最佳。冷冻后解冻液中木糖质量(Z3组:6.5g,S2组:7.2g)大幅增加,半纤维素转化率(Z3组: 24.1%,S2组:26.6%)增幅显著(p<0.05)。经纤维素酶解后其水解液中葡萄糖质量(Z3组: 13.5g,S2组:14.5g)大幅增加,纤维素转化率(Z3组: 30.9%,S2组:33.2%)增幅显著(p<0.05)。对预处理后的原料进行厌氧发酵,累计产气量最高543mL,较CK提升73.5%(S4组),平均甲烷体积分数最高提升160.4%(S2组),且随着冷冻时间的延长(Z组48h以上,S组24h以上)厌氧发酵周期缩短(共19d),产气高峰提早到来且峰值较高。过酸化现象得到有效缓解,能够更快地进入到甲烷化阶段。
DENG Yuanfang  QIU Ling  WANG Yajun  DAI Benlin  XU Jiming
Northwest A&F University;Huaiyin Normal University,Northwest A&F University,Northwest A&F University,Huaiyin Normal University and Huaiyin Normal University
Key Words:rice straw  low-temperature freeze-thaw  enzymatic hydrolysis  anaerobic digestion  biogas
Abstract:In order to use of the outdoor cold climate resources as the low-temperature reaction condition, the objective of this research was to investigate the effect of freeze-thaw treatment (Z groups: -4℃, S groups: -20℃) on the efficiency of hemicellulose degradation and enzymatic hydrolysis pretreatment of rice straw to improve its biodegradability and anaerobic biogas production. A new low temperature freeze-thaw pretreatment development pathway was created for the pre-processing research and development. The results showed that water holding capacity was optimal when soaking temperature was 30℃, time was 4h, and liquid-solid ratio was 15mL/g. Under low temperature freeze-thaw condition, the contents of xylose in the liquid hydrolysates were increased (Z3: 6.5g, S2: 7.2g), hemicellulose conversion rate reached 24.1% (Z3) and 26.6% (S2), which were improved significantly(p<0.05). Glucose yield were increased (Z3: 13.5g,S2:14.5g) after enzymatic hydrolysis, cellulose conversion rate reached 30.9% (Z3) and 33.2% (S2), which were improved significantly (p<0.05). These treatments conditions resulted in the highest total biogas yield (543mL, S4), compared with the CK, the total biogas yield from S4 was improved by 73.5%. The highest average methane concentrations level was 51.3% (S2), compared with CK, it was improved by 160.4%(S2). Extension of time for freeze was apt to shorten the anaerobic fermentation period in the next anaerobic digestion. The digestion time for pretreatment rice straw (Z groups freeze-thaw treatment time was above 48h,S groups freeze-thaw treatment time was above 24h) was calculated as 19d, and the peak values of gas production came earlier than those of other groups. The significant reduction in digestion time indicated that the straw had become more accessible and more readily biodegradable after biological pretreatment. Freeze-thaw and enzymatic pretreatment could be an effective method for improving biodegradability and enhancing the highly efficient biological conversion of rice straw into bioenergy.

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.

   下载PDF阅读器