活性炭通过促进直接种间电子转移增强了对食物垃圾的高固体厌氧消化的认识。
Insights into high-solids anaerobic digestion of food waste enhanced by activated carbon via promoting direct interspecies electron transfer.
机构信息
State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China.
出版信息
Bioresour Technol. 2022 May;351:127008. doi: 10.1016/j.biortech.2022.127008. Epub 2022 Mar 16.
High-solids anaerobic digestion (HS-AD) of food waste frequently confronted the acidification and failure under high organic loading rates (OLRs). Results indicated powdered activated carbon (PAC) addition significantly enhanced methane production and process stability than granular activated carbon, and columnar activated carbon at higher OLRs via accelerating the propionate consumption. Potential direct interspecies electron transfer (DIET) partners, including various syntrophic oxidation bacteria and methanogens, were enriched with the activated carbon (AC) addition. Furthermore, DIET contribution to methane production was 35% by PAC, predicated by the modified Anaerobic Digestion Model No.1 (ADM1). This study deeply elucidated the DIET mechanism and offered the potential foundations for the selection and applications of AC-based materials in HS-AD of food waste.
高固体厌氧消化（HS-AD）经常面临着在高有机负荷率（OLRs）下的酸化和失效。结果表明，粉末状活性炭（PAC）的添加通过加速丙酸的消耗，显著提高了甲烷的产量和过程稳定性，优于颗粒状活性炭和柱状活性炭在更高的 OLRs 下的效果。潜在的直接种间电子转移（DIET）的伙伴，包括各种共氧化细菌和产甲烷菌，在活性炭（AC）的添加下得到了富集。此外，通过修正的厌氧消化模型 No.1（ADM1）预测，PAC 对甲烷生成的 DIET 贡献为 35%。本研究深入阐明了 DIET 机制，并为基于 AC 的材料在食品废物 HS-AD 中的选择和应用提供了潜在的基础。
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