采用联合电离辐射-酸处理预处理草废料以提高发酵产氢。
Pretreatment of grass waste using combined ionizing radiation-acid treatment for enhancing fermentative hydrogen production.
机构信息
Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China.
Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing 100084, PR China.
出版信息
Bioresour Technol. 2018 May;255:7-15. doi: 10.1016/j.biortech.2018.01.105. Epub 2018 Jan 31.
In this study, the combined ionizing radiation-acid pretreatment process was firstly applied to enhance hydrogen fermentation of grass waste. Results showed that the combined pretreatment synergistically enhanced hydrogen fermentation of grass waste. The SCOD and soluble polysaccharide contents of grass waste increased by 1.6 and 2.91 times after the combined pretreatment, respectively. SEM observation and crystallinity test showed the combined pretreatment effectively disrupted the grass structure. Owing to the more favorable substrate conditions, the hydrogen yield achieved 68 mL/g-dry grass after the combined pretreatment, which was 161.5%, 112.5% and 28.3% higher than those from raw, ionizing radiation pretreated and acid pretreated grass waste, respectively. The VS removal also increased from 13.9% to 25.6% by the combined pretreatment. Microbial community analysis showed that the abundance of dominant hydrogen producing genus Clostridium sensu stricto 1 increased from 37.9% to 69.4% after the combined pretreatment, which contributed to more efficient hydrogen fermentation.
在这项研究中，首次应用联合电离辐射-酸预处理工艺来增强草类废物的氢气发酵。结果表明，联合预处理协同增强了草类废物的氢气发酵。与原始草类废物、电离辐射预处理草类废物和酸预处理草类废物相比，联合预处理后草类废物的 COD 总量和可溶性多糖含量分别提高了 1.6 倍和 2.91 倍。扫描电子显微镜观察和结晶度测试表明，联合预处理有效地破坏了草类废物的结构。由于更有利的底物条件，联合预处理后的氢气产率达到了 68 mL/g 干草，比原始、电离辐射预处理和酸预处理的草类废物分别提高了 161.5%、112.5%和 28.3%。挥发性固体去除率也从联合预处理前的 13.9%增加到 25.6%。微生物群落分析表明，联合预处理后产氢优势属梭菌（Clostridium sensu stricto 1）的丰度从 37.9%增加到 69.4%，这有助于更有效地进行氢气发酵。
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