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.
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。
