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浙江大学学报(工学版)
J4  2010, Vol. 44 Issue (3): 476-481    DOI: 10.3785/j.issn.1008973X.2010.03.012
    
Cogeneration of hydrogen and methane from pretreated fat by anaerobic fermentation
 SONG Wen-Lu, CHENG Jun, XIE Bin-Fei, ZHOU Dun-Hu, CEN Ge-Fa
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Abstract  

Cogeneration of hydrogen and methane from pretreated fat by anaerobic fermentation was investigated to improve energy conversion efficiency in hydrogen production from fat, In the hydrogen producing phase, more fat hydrolyzes after the treatment of lipase and alkali, so the cumulative hydrogen production increases. Domesticated bacteria accommodate quickly in the substrate, which results in the curtailment of lagphase time and the increase of the specific hydrogen production. The optimum sodium ion concentration is no more than 0.2 mol/L when using NaOH for hydrolyzation, otherwise hydrogen producing bacteria would be inhibited by high concentration of sodium ion. Methane is produced from the residue of hydrogen production to increase the energy conversion efficiency and the feedstock utilization ratio. The maximum specific hydrogen yield from fat is 32.6 mL/g in the first stage and the methane yield is 24.88 mL/g in the second stage. The cogeneration of hydrogen and methane from fat by twophase anaerobic fermentation can increase the energy conversion efficiency from 0.85% (only hydrogen production) to 2.99%.

Published: 20 March 2012
CLC:  TK 6  
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Cite this article:

SONG Wen-Lu, CHENG Jun, XIE Bin-Fei, ZHOU Dun-Hu, CEN Ge-Fa. Cogeneration of hydrogen and methane from pretreated fat by anaerobic fermentation. J4, 2010, 44(3): 476-481.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008973X.2010.03.012     OR     http://www.zjujournals.com/eng/Y2010/V44/I3/476


脂肪预处理发酵联产氢气和甲烷的研究

针对脂肪难以产氢、能源转化率低的问题,以肥猪肉作为脂肪代表物,研究了其预处理后发酵联产氢气和甲烷的特性.结果表明,在产氢阶段,碱和脂肪酶预处理促进了脂肪的水解,提高了累积产氢量.驯化菌种能较快的适应底物环境,从而缩短延滞期并提高了产气速率.碱水解时应控制体系的Na+终浓度不超过0.2 mol/L,更高的碱用量会因Na+浓度过高而抑制产氢.为了提高能源转化率和原料利用率,提出了利用脂肪发酵产氢后的有机酸废液继续联产甲烷的创新工艺,并利用该工艺得到底物总挥发性固体的单位产氢潜力为32.6 mL/g,联产甲烷潜力为24.88 mL/g.其中单产氢气的能源转化率为0.85%,联产甲烷以后的能源转化率可提高至2.99%.
 

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