当前位置: X-MOL 学术Bioprocess Biosyst. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Comparison of anaerobic digesters performance treating palmitic, stearic and oleic acid: determination of the LCFA kinetic constants using ADM1.
Bioprocess and Biosystems Engineering ( IF 3.8 ) Pub Date : 2020-03-20 , DOI: 10.1007/s00449-020-02328-2
Alexandros Eftaxias 1 , Vasileios Diamantis 1 , Christos Michailidis 1 , Katerina Stamatelatou 1 , Alexandros Aivasidis 1
Affiliation  

In this work, the process performance of three parallel anaerobic digesters was evaluated while treating emulsified long-chain fatty acids (LCFA) (i.e., palmitic, stearic and oleic acid) at two different organic loading rates (OLR) (2 and 4 g L−1 day−1). The digester treating palmitic acid achieved a biogas yield of 0.42 ± 0.05 L g−1 COD with a digester effluent COD of 2.3 ± 0.4 g L−1 and VFA concentrations below 250 mg L−1. Stearic acid showed lower biogas yield values (0.34 ± 0.05 L g−1 COD) with low effluent COD (2.5 ± 0.4 g L−1) and VFA concentrations (< 350 mg L−1). On the contrary, anaerobic digestion of oleic acid was accompanied with increased effluent COD (4.5 ± 0.7 g L−1) and VFA concentrations (2.7 ± 1.5 g L−1). As such, COD removal efficiency remained at 89 ± 1% compared to 95 ± 1% for the digesters treating palmitic and stearic acid. During continuous digester operation, there was a decrease in VFA concentrations (around 1–2 g L−1), combined with increasing biogas yield values up to 0.51 ± 0.04 L g−1 COD, possibly due to biomass adaptation to oleic acid. Digester foaming was recorded when the accumulated COD was higher than 200, 1200 and 500 mg COD g−1 MLSS for the digester treating palmitic, stearic and oleic acid, respectively. ADM1 simulation allowed for the determination of the maximum specific LCFA consumption rate constant (km) which was equal to 4.8, 1.6 and 8.0 day−1 for palmitic, stearic and oleic acid respectively.



中文翻译:

厌氧消化池处理棕榈酸,硬脂酸和油酸的性能比较:使用ADM1测定LCFA动力学常数。

在这项工作中,评估了三个平行厌氧消化器的处理性能,同时以两种不同的有机负荷率(OLR)(2和4 g L)处理了乳化长链脂肪酸(LCFA)(即棕榈酸,硬脂酸和油酸)-1-1)。处理棕榈酸的蒸煮器的沼气产量为0.42±0.05 L g -1 COD,蒸煮器出水的COD为2.3±0.4 g L -1且VFA浓度低于250 mg L -1。硬脂酸显示较低的沼气产量值(0.34±0.05 L g -1 COD),低排放的COD(2.5±0.4 g L -1)和VFA浓度(<350 mg L -1)。相反,厌氧消化油酸会增加废水的COD(4.5±0.7 g L -1)和VFA浓度(2.7±1.5 g L -1)。因此,COD去除效率保持在89±1%,而处理棕榈酸和硬脂酸的蒸煮器的COD去除效率为95±1%。在连续蒸煮器运行期间,VFA浓度降低(约1-2 g L -1),同时沼气产量值增加至0.51±0.04 L g -1 COD,这可能是由于生物质适应了油酸。当累积的COD高于200、1200和500 mg COD g -1时,记录到消化器起泡MLSS用于分别处理棕榈酸,硬脂酸和油酸的蒸煮器。ADM1模拟可以确定棕榈酸,硬脂酸和油酸的最大比LCFA消耗速率常数(km),分别等于4.8、1.6和8.0天-1

更新日期:2020-03-20
down
wechat
bug