Optimization of Hydrogen Yield from the Anaerobic Digestion of Crude Glycerol and Swine Manure
Optimization of Hydrogen Yield from the Anaerobic Digestion of Crude Glycerol and Swine Manure
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DOI：
10.3390/catal9040316
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发表时间：
2019-04-01
期刊：
影响因子：
3.9
通讯作者：
Sebastian, P. J.
中科院分区：
文献类型：
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作者：
Aguilar-Aguilar, F. A.;Longoria, Adriana;Sebastian, P. J.
粗甘油和猪粪是墨西哥指数生产的残留物，尽管如此，它们有可能从发酵过程中产生氢气。为此，本研究采用响应面法对粗甘油和猪粪产氢的优化进行了评价。响应面方法有助于压缩粗甘油/猪粪的混合物，从而产生氢气，这提高了该过程的产率，减少了开发的可变性和时间。采用中心复合设计，有两个因素，六个轴向点和四个中心点。评价的两个因素是粗甘油和猪粪浓度，这是在4至10克L-1和5至15克L-1的范围内进行了检查，分别。本研究表明，热预处理方法仍然是最适合的方法，主要是在制备产氢接种物。最大氢气产率为142.46 mL/g添加的挥发性固体。发酵21 d，发酵液中粗甘油（2.75 g L-1）的消耗率为21.56%，猪粪（10 g L-1）的消耗率为78.44%，碳氮比为18.06。采用响应面法对影响发酵产氢的因素进行优化，以最大限度地提高粗甘油/猪粪的比例，减少试验次数，降低运行成本。
Crude glycerol and swine manure are residues with exponential production in Mexico, nonetheless, they have the potential to generate hydrogen from the fermentation process. For this reason, this study has evaluated the optimization of hydrogen yield from crude glycerol and swine manure, using the response surface methodology. The response surface methodology helps in the compression of the mixture of crude glycerol/ swine manure, with the production of hydrogen as a result, which improves the yields of the process, reducing variability and time of development. A central composite design was employed with two factors, six axial points and four central points. The two factors evaluated were crude glycerol and swine manure concentrations, which were examined over a range of 4 to 10 g L-1 and 5 to 15 g L-1, respectively. This study demonstrated that the thermal pretreatment method is still the most suitable method to be applied, mainly in the preparation of hydrogen-producing inoculum. The maximum hydrogen yield was 142.46 mL per gram of volatile solid added. It used up 21.56% of the crude glycerol (2.75 g L-1) and 78.44% (10 g L-1) of the swine manure, maintaining a carbon/nitrogen ratio of 18.06, with a fermentation time of 21 days. The response surface methodology was employed to maximize the hydrogen production of crude glycerol/swine manure ratios by the optimization of factors with few assays and less operational cost.