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• Main Authors: HEYAO CHANG, 張賀堯
• Other Authors: 徐敬衡
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/2ge57r

碩士 === 國立中央大學 === 化學工程與材料工程學系 === 106 === Anaerobic digestion is a widely used technology with dual benefits for treating different types of organic wastes and generating biogas. In general, we directly use sludge and agricultural waste to produce methane in anaerobic fermentation. However, methane yield and growth rate of methanogens is limited by the degradation efficiency of agricultural waste rich in lignin. So we use acid pretreatment and the co-digestion to enhance our production. My experiment uses acid pretreatment on SMS. Different concentration & type of acid are used for experiment parameter. Using 5% of hydrochloric acid for 60 min makes the highest reduced sugar which is about 15.22 g/L. After pretreatment, SMS & chicken manure are sent to anaerobic fermentation. The non-pretreatment SMS is the control group. The 60 min 5% hydrochloric acid pretreatment get the highest daily methane concentration and the total methane production. It’s about 346% to the control group. C/N ratio is also an important parameter in the experiment. We found that the methane production per total solid is increased by 23% to 107 mL/g when the C/R ratio rise to 20 from 11. Finally, we discuss the inhibitor in the fermentation. HMF is the main inhibitor in the fermentation and it comes from the hydrolysis in acid pretreatment. Using activated carbon to absorb is the way to solve it, but it will also absorb the reducing sugar. We found that using 40 g/L of activated carbon absorb 60min makes the methane production increased by 33%. It is an effective way to increase the methane production.