Department of Biological and Environmental Sciences, Federal University of Technology, Parana, Brazil.
Department of Chemical Engineering, Biotechnology and Environmental Technology, University of Southern Denmark, Odense, Denmark.
Environ Technol. 2020 Mar;41(7):921-930. doi: 10.1080/09593330.2018.1515262. Epub 2018 Sep 2.
The anaerobic digestion (AD) of a high diversity blend of fruit and vegetable waste (FVW) generated in tropical conditions as a single substrate was performed. A continuously stirred tank reactor (CSTR) operated in semi-continuous regime was used for AD. The reactor performance was monitored with gradually increasing organic loading rates (OLRs) from 0.5 up to 5.0 gVS L d. The biochemical methane potential (BMP) of FVW determined by batch bottles was 360 L CH kg, with a biodegradability of 79%. A stable pH with an adequate level of buffering capacity was observed during the entire experiment. Methane yield indicated the best performance at an OLR of 3.0 gVS L d, with 285 L CH kg added, reaching 79% of BMP. At an OLR over 3.0 gVS L d accumulation of volatile fatty acids (VFA) was detected; in particular, propionic acid was monitored, and a decreased methane yield was detected. Biogas production rate was 1.55 L L d and showed linear increase according to increases in the OLR.
在热带条件下，以单一底物的形式对水果和蔬菜废物（FWV）的高多样性混合物进行了厌氧消化（AD）。使用连续搅拌罐反应器（CSTR）在半连续模式下进行 AD。通过逐渐增加有机负荷率（OLR）从 0.5 增加到 5.0 gVS L d 来监测反应器性能。通过批量瓶确定的 FVW 的生物甲烷潜力（BMP）为 360 L CH kg，生物降解性为 79%。在整个实验过程中，观察到稳定的 pH 值和足够的缓冲能力水平。在 OLR 为 3.0 gVS L d 时，甲烷产率最高，添加了 285 L CH kg，达到了 BMP 的 79%。在 OLR 超过 3.0 gVS L d 时，检测到挥发性脂肪酸（VFA）的积累；特别是监测到丙酸，检测到甲烷产率降低。沼气产生速率为 1.55 L L d，并根据 OLR 的增加呈线性增加。
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