基于光发酵的玉米芯生物制氢与生物肥料联产工艺优化及碳足迹分析
Co-production process optimization and carbon footprint analysis of biohydrogen and biofertilizer from corncob by photo-fermentation.
作者信息
Zhang Zhiping, Ai Fuke, Li Yameng, Zhu Shengnan, Wu Qiyou, Duan Zhisai, Liu Hanchuan, Qian Liyang, Zhang Quanguo, Zhang Yang
机构信息
Key Laboratory of New Materials and Facilities for Rural Renewable Energy, MOA of China, Henan Agricultural University, Zhengzhou 450002, China.
Key Laboratory of New Materials and Facilities for Rural Renewable Energy, MOA of China, Henan Agricultural University, Zhengzhou 450002, China.
出版信息
Bioresour Technol. 2023 May;375:128814. doi: 10.1016/j.biortech.2023.128814. Epub 2023 Mar 2.
In this study, corncob was taken as substrate, the co-production process of biohydrogen and biofertilizer by photo-fermentation was investigated and its carbon footprint analysis was conducted to evaluate the carbon transfer pathway. Biohydrogen was produced by photo-fermentation, and the hydrogen producing residues were immobilized by sodium alginate. Cumulative hydrogen yield (CHY) and nitrogen release ability (NRA) was taken as references, and the effect of substrate particle size on the co-production process was evaluated. Results showed that due to the porous adsorption properties, corncob size of 120 mesh was the optimal one. Under that condition, the highest CHY and NRA were 71.16 mL/g TS and 68.76%, respectively. The carbon footprint analysis indicted that 7.9% carbon element was released as carbon dioxide, 78.3% carbon element was immobilized in the biofertilizer, and 13.8% carbon element was lost. This work is significant of the biomass utilization and clean energy production.
本研究以玉米芯为底物，考察了光发酵联产生物氢和生物肥料的过程，并对其进行碳足迹分析以评估碳转移途径。通过光发酵产生生物氢，产氢残渣用海藻酸钠固定化。以累积产氢量（CHY）和氮释放能力（NRA）为参考指标，评估底物粒径对联产过程的影响。结果表明，由于具有多孔吸附特性，120目的玉米芯粒径为最佳。在此条件下，最高CHY和NRA分别为71.16 mL/g TS和68.76%。碳足迹分析表明，7.9%的碳元素以二氧化碳形式释放，78.3%的碳元素固定在生物肥料中，13.8%的碳元素损失。这项工作对生物质利用和清洁能源生产具有重要意义。
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