University of South Wales, Llantwit Road, Treforest, Pontypridd CF37 1DL, UK.
University of South Wales, Llantwit Road, Treforest, Pontypridd CF37 1DL, UK.
Waste Manag. 2021 Mar 1;122:81-88. doi: 10.1016/j.wasman.2020.12.032. Epub 2021 Jan 22.
A novel method to recover VFAs from a continually-fed 100 L food waste bioreactor was developed using industrially applicable methods. The in-situ recovery of VFAs increased production rates from 4 to 35 mg g day by alleviating end-product inhibition and arresting methanogenesis, and electrodialysis was able to concentrate the recovered VFAs to 4000 mg L. There remains considerable scope to increase the production rates and concentrations further, and the VFAs were recovered in a form that made them suitable for use as platform chemicals with minimal refining. This is the first time that continuous VFA recovery from real-world food waste has been reported at this scale with continual feeding, and represents a promising means through which to produce sustainable platform chemicals. Furthermore the production of VFAs arrests methane production in bioreactors, which is a low value product around which there is a growing concern about fugitive emissions contributing to climate change.
开发了一种从 100L 连续进料的食物垃圾生物反应器中回收 VFAs 的新方法，该方法使用了工业上可应用的方法。通过缓解末端产物抑制和抑制产甲烷作用，原位回收 VFAs 将产率从 4mg/g·天提高到 35mg/g·天，电渗析能够将回收的 VFAs 浓缩到 4000mg/L。进一步提高产率和浓度的空间仍然很大，回收的 VFAs 以一种不需要进行过多精炼就可作为平台化学品使用的形式被回收。这是首次在连续进料的情况下，以这种规模从实际食物垃圾中连续回收 VFA，代表了一种很有前途的方法，可以用来生产可持续的平台化学品。此外，VFAs 的生产阻止了生物反应器中甲烷的产生，甲烷是一种低附加值产品，围绕它产生了越来越多的关于逃逸排放导致气候变化的担忧。
