日本地球惑星科学連合2018年大会

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[EE] ポスター発表

セッション記号 A (大気水圏科学) » A-GE 地質環境・土壌環境

[A-GE30] エネルギ・環境・水ネクサスと持続的発展

2018年5月21日(月) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:張 銘(産業技術総合研究所地質調査総合センター地圏資源環境研究部門)、川本 健(埼玉大学大学院理工学研究科)、薛 強(中国科学院武漢岩土力学研究所、共同)、Jet-Chau Wen(National Yunlin University)

[AGE30-P02] Enhancement of biogas production from swine wastewater via adding acidification-stage

*Lin Chiu-Yue1,2,3Shei Hung-Wei2Lay Chi-How2,3 (1.Department of Environmental Engineering and Science, Feng Chia University, Taiwan、2.Green Energy Development Center, Feng Chia University, Taiwan、3.APEC Research Center for Advanced Biohydrogen Technology)

キーワード:Acidification、anaerobic digestion、swine wastewater

1.Background
Anaerobic digestion to obtain biogas as a renewable fuel is promising from the viewpoint of circular economy. It has been reported that two-stage anaerobic digestion would recover more 8-43 % energy than a conventional one-stage anaerobic digestion (Schievano et al., 2014). The purpose of this study is to evaluate the potential of adding an acidification stage to promote the biogas production in the conventional anaerobic treatment of swine wastewater.

2.Methods
A batch mode of anaerobic digestion was used in acidification and methanogenesis. Taguchi method was applied for obtaining optimal operation temperature, pH and acidification time. Tested temperatures were 25, 35, 45 and 55 oC. Tested pH values were 5.5, 6.0, 6.5 and 7.0. Tested acidification times were 6, 12, 18 and 24 h.

3.Results
In methane production batch test , the highest methane production rate (140 mL/d-L) was at acidification time 18 h, pH 5.5 and 35℃ and the highest methane production yield (905 mL/g CODremoved) was at acidification time 12 h, pH 6.0 and 25℃. The highest COD degradation rate 80% was at acidification time 24 h, pH 6.5 and 35℃. According to data obtained by Taguchi method it was fund that the best affective factors to produce methane was acidification time 18 h, pH 6.5 and 35℃.

Acknowledgements
The authors appreciated the financial supports by Ministry of Science and Technology of Taiwan (MOST 105-2221-E-035-006-MY3, 106-2221-E-035-007).