1. 毕业设计（论文）的内容和要求

1.毕业设计（论文）内容沼气中一般含有50%～70%的甲烷，25%～45%的二氧化碳以及少量的硫化氢和水等成分，在用作燃料前必须经过一系列的纯化来提高甲烷的含量，如果能通过厌氧发酵体系自身的代谢过程， 纯化沼气，提高甲烷的含量，将会更好一些。

通入一定的外加电压可以连续地产生氧气和氢气，氧气提供微好氧环境，微氧环境有利于水解阶段的进行，促进有机物的分解，提高产气量，同时，电解水产生的氧气可以与沼气中的硫化氢发生氧化还原反应，将硫化氢氧化成硫单质，从而有效地降低沼气中有毒气体硫化氢的含量，氢气作用于产甲烷阶段，可以提高甲烷的含量的同时降低二氧化碳的含量。

2.毕业设计（论文）要求 1.通过查阅文献的方法，阅读大量与课题相关资料（尤其是外文文献），及时了解国内外有关厌氧发酵，产甲烷的途径及原理，外加电压大小以及电极等研究进展。

2. 参考文献

[1] BARCA C, SORIC A, RANAVA D, et al. Anaerobic biofilm reactors for dark fermentative hydrogen production from wastewater: A review [J]. Bioresource technology, 2015, 185(386-98. [2] PAGE L H, NI J-Q, HEBER A J, et al. Characteristics of volatile fatty acids in stored dairy manure before and after anaerobic digestion [J]. Biosystems Engineering, 2014, 118(16-28. [3] CAZIER E A, TRABLY E, STEYER J P, et al. Biomass hydrolysis inhibition at high hydrogen partial pressure in solid-state anaerobic digestion [J]. Bioresource technology, 2015, 190(106-13. [4] YANG L, HUANG Y, ZHAO M, et al. Enhancing biogas generation performance from food wastes by high-solids thermophilic anaerobic digestion: Effect of pH adjustment [J]. International Biodeterioration Biodegradation, 2015, 105(153-9. [5] DOS REIS C M, CAROSIA M F, SAKAMOTO I K, et al. Evaluation of hydrogen and methane production from sugarcane vinasse in an anaerobic fluidized bed reactor [J]. International Journal of Hydrogen Energy, 2015, 40(27): 8498-509. [6] KARLSSON A. Effects of temperature, hydraulic retention time and hydrogen extraction rate on hydrogen production from the fermentation of food industry residues and manure [J]. International Journal of Hydrogen Energy, 2008, 33(3): 953-62. [7] MKHIZE N T, MSAGATI T A M, MAMBA B B, et al. Determination of volatile fatty acids in wastewater by solvent extraction and gas chromatography [J]. Physics and Chemistry of the Earth, Parts A/B/C, 2014, 67-69(86-92. [8] CHO H U, KIM Y M, CHOI Y N, et al. Influence of temperature on volatile fatty acid production and microbial community structure during anaerobic fermentation of microalgae [J]. Bioresource technology, 2015, 191(475-80. [9] RIBEIRO VASCONCELOS DE S L, DE OLIVEIRA MOUTTA R, PINTO DA SILVA BON E, et al. Fermentative biohydrogen production using hemicellulose fractions: Analytical validation for C5 and C6-sugars, acids and inhibitors by HPLC [J]. International Journal of Hydrogen Energy, 2015, 40(40): 13888-900.

3. 毕业设计（论文）进程安排

2016.01.20~2016.03.30 查阅文献资料，熟悉课题并设计实验方案 2016.04.01~2016.04.10 初步实验。

2016.04.11~2016.05.10 中期汇报，完善实验方案，进行具体的实验 2016.05.11~2016.05.20 整理实验数据，总结实验结果 2016.05.21~2016.06.10 撰写毕业论文，论文答辩