Addition of granular activated carbon and trace elements to favor volatile fatty acid consumption during anaerobic digestion of food waste
Addition of granular activated carbon and trace elements to favor volatile fatty acid consumption during anaerobic digestion of food waste
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DOI：
10.1016/j.biortech.2018.03.097
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发表时间：
2018-07-01
影响因子：
11.4
通讯作者：
Escudie, Renaud
中科院分区：
文献类型：
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作者：
Capson-Tojo, Gabriel;Moscoviz, Roman;Escudie, Renaud
研究了添加颗粒活性炭和微量元素对连续间歇式反应器处理餐厨垃圾厌氧消化性能的影响。第一批试验结果表明，添加活性炭有利于生物质驯化，改善乙酸消耗，提高甲烷产量。添加微量元素可以加快丙酸的消耗。第二批实验证明，同时添加活性炭和微量元素时，存在协同作用。特别改善了丙酸氧化降解动力学，显著缩短了间歇时间，提高了平均甲烷产率。活性炭的添加有利于古细菌和共生细菌的生长，表明这些微生物之间的相互作用增强。有趣的是，微生物分析显示氢营养型产甲烷菌占主导地位。本研究首次表明，添加颗粒活性炭和微量元素可能是稳定餐厨垃圾厌氧消化的可行解决方案。
The effect of supplementing granular activated carbon and trace elements on the anaerobic digestion performance of consecutive batch reactors treating food waste was investigated. The results from the first batch suggest that addition of activated carbon favored biomass acclimation, improving acetic acid consumption and enhancing methane production. Adding trace elements allowed a faster consumption of propionic acid. A second batch proved that a synergy existed when activated carbon and trace elements were supplemented simultaneously. The degradation kinetics of propionate oxidation were particularly improved, reducing significantly the batch duration and improving the average methane productivities. Addition of activated carbon favored the growth of archaea and syntrophic bacteria, suggesting that interactions between these microorganisms were enhanced. Interestingly, microbial analyses showed that hydrogenotrophic methanogens were predominant. This study shows for the first time that addition of granular activated carbon and trace elements may be a feasible solution to stabilize food waste anaerobic digestion.