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자료유형
학술저널
저자정보
정재훈 (경기대학교) 이시진 (경기대학교)
저널정보
한국폐기물자원순환학회 한국폐기물자원순환학회지 한국폐기물자원순환학회지 제38권 제6호
발행연도
2021.12
수록면
483 - 492 (10page)
DOI
https://doi.org/10.9786/kswm.2021.38.6.483

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In this paper, we studied the efficiency of reducing sulfur inhibition during anaerobic digestion using biochar. The study was conducted using a batch test called the biochemical methane potential test in which various concentrations of Na 2 S were injected to determine the effects of sulfur. This experiment used leached food wastewater as the feedstock, and the composition of the experiment was divided into three sets; In Set 1, only Na 2 S was injected except for control, based on sulfur concentration (20-1,000 mg/L). In Set 2, biochar (BC, 5 g/L) were additionally injected to the Set 1 conditions. For comparison, FeCl 3 (24 g/ L) was injected together with Na 2 S in Set 3. The experiment indicated that overall the concentration of H2S in the generated biogas was significantly lower than that of other sets in Set 3 (injected with FeCl 3 ). Furthermore, the concentration of H2S in Set 2 (injected with biochar) was found to be lower than that of Set 1 in the low-concentration range of Na 2 S. However, there was no significant difference from Set 1 in the high concentration range of Na 2 S. This result indicates that biochar can reduce the inhibition of sulfur; however, the efficiency decreases as the concentration increases. Furthermore, Set 3 yielded lower methane compared to the other sets, where the lowest biogas yield and methane yield were found to be 200+Fe in Set 3 as 0.046 m 3 /kgVS and 0.021 m3/kgVS, respectively. On the other hand, the highest biogas yield and methane yield were found to be 25+BC in Set 2 as 0.308 m 3 /kgVS and 0.166 m 3 /kgVS, respectively. This result indicates that Fe can reduce the effects of sulfur; however, it cannot enhance the efficiency of biogas production. Meanwhile, biochar has been seen to enhance both sulfur control and biogas production efficiency and hence can be used as a valuable material.

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