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.

中文翻译：

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添加颗粒活性炭和微量元素有利于食物垃圾厌氧消化过程中挥发性脂肪酸的消耗


研究了补充颗粒活性炭和微量元素对处理食物垃圾的连续间歇式反应器厌氧消化性能的影响。第一批结果表明，添加活性炭有利于生物质驯化，改善乙酸消耗并提高甲烷产量。添加微量元素可以更快地消耗丙酸。第二批证明，同时补充活性炭和微量元素时存在协同作用。丙酸盐氧化的降解动力学得到了特别改善，显着缩短了批次持续时间并提高了平均甲烷生产率。添加活性炭有利于古细菌和互养细菌的生长，表明这些微生物之间的相互作用得到增强。有趣的是，微生物分析表明，氢营养产甲烷菌占主导地位。这项研究首次表明，添加颗粒活性炭和微量元素可能是稳定食物垃圾厌氧消化的可行解决方案。