Enhanced anaerobic digestion of tar solution from rice husk thermal gasification with hybrid upflow anaerobic sludge-biochar bed reactor
Enhanced anaerobic digestion of tar solution from rice husk thermal gasification with hybrid upflow anaerobic sludge-biochar bed reactor
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DOI：
10.1016/j.biortech.2022.126688
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发表时间：
2022-01-13
影响因子：
11.4
通讯作者：
Kuramochi, Hidetoshi
中科院分区：
文献类型：
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作者：
Ma, Haiyuan;Hu, Yong;Kuramochi, Hidetoshi
生物质气化过程中产生的副产物焦油含有高浓度的难降解有机物。在本研究中，建立了上流式厌氧污泥-生物炭床复合反应器处理焦油，甲烷产率为120-154NML-CH4/g-CODinf，比对照反应器高20-30%。当进水焦油浓度从4954mgCOD/L增加一倍至9964mgCOD/L时，两种反应器的COD去除和甲烷产量均显著降低。间歇试验证实，较高的焦油浓度抑制了甲烷的产生，并导致了较长的滞后期。生物炭的加入有效地缓解了对有机物的抑制作用，延长了有机物的滞留时间。扫描电子显微镜观察和16S rRNA分析表明，生物炭也是微生物的载体，并促进了部分微生物的生长。本研究结果为焦油处理提供了新的思路。
Tar generated as a by-product during biomass gasification contains a high concentration of refractory organic matters. In this study, a hybrid upflow anaerobic sludge-biochar bed reactor was established for tar treatment, and the methane yield was 120-154 NmL-CH4/g-CODinf, 20-30% higher than the control reactor. COD removal and methane production significantly decreased in both reactors when the influent tar concentration was doubled from 4954 mg-COD/L to 9964 mg-COD/L. When the influent concentration was reduced, the biochar packed reactor showed a faster recovery. Batch tests confirmed that higher tar concentration inhibited methane production and induced longer lagphase. Biochar addition effectively relieved the inhibition and prolonged the retention of organic matters. SEM observation and 16S rRNA analysis suggested that biochar also acted as the microbe's carrier, and promoted the growth of some microbes. The results of this study provide new ideas for tar treatment.