| 付嘉琦,夏嵩,陈小平,付尹宣,晏恒,吴九九.碱预处理稻秆与猪粪混合厌氧发酵特性研究[J].农业环境科学学报,2018,37(6):1255-1261. |
| 碱预处理稻秆与猪粪混合厌氧发酵特性研究 |
| Anaerobic co-digestion of rice straw after alkali pretreatment with pig manure |
| 投稿时间：2017-10-31 |
| DOI：10.11654/jaes.2017-1498 |
| 中文关键词: 碱处理 稻秆 猪粪 混合厌氧发酵 |
| 英文关键词: alkali pretreatment rice straw pig manure anaerobic co-digestion |
| 基金项目:国家自然科学基金项目（31700311）；江西省重点研发计划项目（20171BBF60025）；江西省青年科学基金项目（20161BAB214181）；江西省新能源发展专项（赣能综字[2014]248号）；江西省科学院重大科技专项（2016-YZD1-03） |
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| 摘要点击次数: 1880 |
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| 中文摘要: |
| 采用不同浓度的NaOH对稻秆进行预处理，对碱处理的糖化效果、作用机制以及对混合厌氧发酵产甲烷的影响进行了研究。结果表明：当NaOH溶液浓度为1.5%（W/V）时产还原糖质量分数最高，达到71.6 mg·g-1稻秆，远高于对照组（P<0.01）；扫描电镜（SEM）分析发现预处理后稻秆结构松散，细胞壁松弛，外壁比表面积增大，生物可利用性增加；傅里叶变换红外光谱仪（FTIR）和同步热分析仪（TG）分析均发现，NaOH预处理改变了稻秆的结构特征，木质素和半纤维素含量发生了变化；采用全自动甲烷潜力测试系统（AMPTS）对预处理稻秆及其与猪粪混合发酵产甲烷特性进行了分析，发现经1.5% NaOH预处理的稻秆中温厌氧发酵累积产甲烷量为327.10 mL·g-1 VS，远高于对照组稻秆的产甲烷量（P<0.01）；将经1.5% NaOH处理后的稻草秸秆与猪粪进行混合厌氧发酵，累积甲烷产量达到了340.95 mL·g-1 VS，比未处理稻秆猪粪混合组的272.23 mL·g-1 VS提高了25.24%（P<0.01），比单一碱处理稻秆组提高了4.23%（P<0.05）。研究结果表明1.5% NaOH预处理能够有效改善稻秆纤维结构，提高其与猪粪混合厌氧发酵的产甲烷效率。 |
| 英文摘要: |
| Rice straw was pretreated with different concentrations of NaOH before anaerobic co-digestion with pig manure to study the impact of alkali pretreatment on methane production efficiency. The weight and enzymatic hydrolysis saccharification of pretreated and untreated rice straw were determined. When rice straw was pretreated by 1.5%(W/V) NaOH, the reducing sugar content was as high as 71.6 mg·g-1 rice straw. The scanning electron microscope(SEM) results showed that NaOH pretreatment could loosen the structure of rice straw and cell wall, enlarge specific surface area and increase its bioavailability. The Fourier transform infrared spectroscopy and thermogravimetry results showed that the structure characteristics of rice straw were changed after NaOH pretreatment and the contents of lignin and semicellulose were changed. The methane producing characteristics of anaerobic co-digestion of pretreated rice straw with pig manure were analyzed by automatic methane potential test system Ⅱ. The highest methane production was 327.10 mL·g-1 VS and achieved under 1.5%(W/V) NaOH pretreatment, which was much higher than that of untreated group(P<0.01). The methane production of co-digestion of rice straw after 1.5%(W/V) NaOH pretreatment with pig manure was 340.95 mL·g-1 VS, which was increased by 25.24%(P<0.01) and 4.23%(P<0.05) compared with untreated group and with single pretreated rice straw digestion. 1.5% NaOH pretreatment could effectively improve the rice straw fiber structure and improve methane production efficiency of anaerobic co-digestion with pig manure. |
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