在高容积有机负荷下，渗滤床反应器（LBR）中食物垃圾的产酸发酵：颗粒状活性炭（GAC）的影响和接种物的顺序富集。
Acidogenic fermentation of food waste in a leachate bed reactor (LBR) at high volumetric organic Loading: Effect of granular activated carbon (GAC) and sequential enrichment of inoculum.
机构信息
Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, Canada.
Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, ON, Canada.
出版信息
Bioresour Technol. 2022 Oct;361:127705. doi: 10.1016/j.biortech.2022.127705. Epub 2022 Jul 27.
This study investigated the impact of different granular activated carbon (GAC) loadings and inoculum enrichment on acidogenic fermentation of food waste in a leachate bed reactor (LBR) operated at a high volumetric organic loading of 49 g VS/L. LBR with a high GAC loading of 0.51 g GAC/g VS achieved hydrolysis yield of 620 g SCOD/kg VS, significantly (P ≤ 0.05) higher to that obtained for LBRs with low or no GAC loading. A high GAC loading also resulted in a higher acidification yield of 507 g COD/kg VS. Butyrate dominated the short-chain fatty acid (SCFA) composition by constituting 57-60 % of total SCFA at high GAC loadings, while the composition of acetate (38-40 %) and butyrate (36-38 %) were similar at lower GAC loadings. Inoculum enrichment further improved the hydrolysis and acidogenesis yields by 10-22 % resulting in the final hydrolysis yield of 683 g SCOD/kg VS and acidification yield of 617 g COD/kg VS.
本研究考察了不同颗粒状活性炭（GAC）负载量和接种物富集会如何影响在高容积有机负荷（49 g VS/L）下运行的渗滤床反应器（LBR）中食物垃圾的产酸发酵。GAC 负载量为 0.51 g GAC/g VS 的 LBR 达到了 620 g SCOD/kg VS 的水解产率，显著高于（P ≤ 0.05）低 GAC 负载量或无 GAC 负载量的 LBR。高 GAC 负载量还导致了 507 g COD/kg VS 的更高酸化产率。但丁酸在高 GAC 负载量下占短链脂肪酸（SCFA）组成的 57-60%，而在低 GAC 负载量下，乙酸（38-40%）和丁酸（36-38%）的组成相似。接种物富集会进一步提高水解和产酸率 10-22%，从而使最终水解产率达到 683 g SCOD/kg VS 和酸化产率达到 617 g COD/kg VS。
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