通过微波预处理和丁酸梭菌的生物增强作用提高非无菌食物废物的生物转化制氢。
Improving the non-sterile food waste bioconversion to hydrogen by microwave pretreatment and bioaugmentation with Clostridium butyricum.
机构信息
LNEG, Laboratório Nacional de Energia e Geologia, Unidade de Bioenergia, Estrada do Paço do Lumiar, 1649-038 Lisboa, Portugal; Instituto Dom Luiz, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
Instituto Dom Luiz, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
出版信息
Waste Manag. 2019 Apr 1;88:226-235. doi: 10.1016/j.wasman.2019.03.021. Epub 2019 Mar 27.
This work targeted the energy recovery from food waste (FW), aiming at the implementation of a potentially participative process of FW conditioning before the non-sterile biological conversion to hydrogen (H). Food waste conversion was initially performed under sterile conditions, achieving a maximum H productivity of 249.5 ± 24.6 mL H (L h) and a total H production to 4.1 ± 0.2 L L. The non-sterile operation was implemented as a way of process simplification, but the total H production decreased by 59% due to the FW native microorganisms. To counteract this effect, FW was submitted to acid, microwave (MW), and combined acid and MW pretreatment. The application of 4 min MW, 550 W, efficiently controlled the FW microbial counts. The Clostridium butyricum bioaugmented conversion of MW-pretreated FW accelerated the H production to 406.2 ± 8.1 mL (L h) and peaked the total H production and conversion yield to 4.6 ± 0.5 L L and 234.6 ± 55.6 mL (g sugar), respectively. These results exceeded in 63, 12 and 4%, respectively, the H productivity, total production and sugar conversion yield obtained under sterile conditions, and are encouraging for the future implementation of increasingly responsible waste valorisation practices.
本研究针对食物垃圾（FW）的能量回收，旨在实施 FW 调理的潜在参与过程，然后进行非无菌生物转化为氢气（H）。FW 最初在无菌条件下进行转化，最大 H 生产率为 249.5±24.6 mL H（L h），总 H 产量为 4.1±0.2 L L。非无菌操作是为了简化工艺，但由于 FW 天然微生物的存在，总 H 产量下降了 59%。为了抵消这种影响，FW 进行了酸、微波（MW）和酸与 MW 联合预处理。应用 4 分钟 MW、550 W 的 MW 预处理可有效控制 FW 的微生物计数。添加丁酸梭菌进行 MW 预处理 FW 的生物转化可将 H 产量加速至 406.2±8.1 mL（L h），并使总 H 产量和糖转化率分别达到 4.6±0.5 L L 和 234.6±55.6 mL（g 糖）。这些结果分别比无菌条件下获得的 H 生产率、总产量和糖转化率提高了 63%、12%和 4%，为未来实施越来越负责任的废物增值实践提供了希望。
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