Use of near infrared spectroscopy in monitoring of volatile fatty acids in anaerobic digestion.
Use of near infrared spectroscopy in monitoring of volatile fatty acids in anaerobic digestion.
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DOI：
10.2166/wst.2009.345
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发表时间：
2009-07
期刊：
影响因子：
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通讯作者：
H. Fabian Jacobi;Christian R Moschner;E. Hartung
中科院分区：
文献类型：
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作者：
H. Fabian Jacobi;Christian R Moschner;E. Hartung
近年来，农业沼气生产得到了迅速发展。因此，对沼气厂优化厌氧消化（AD）过程效率的要求已经大大增加。目前还没有在线监督工具可以监测AD过程，但昂贵且耗时的化学分析是必要的。本课题探讨了利用近红外光谱（NIRS）跟踪总挥发性脂肪酸（VFA）、乙酸和丙酸等相关工艺参数的可能性。将nir传感器集成到一个1 MW的全规模沼气装置中，并半连续记录发酵罐内容物的nir光谱，持续500天。每周取样并对上述参数进行分析。计算校准模型，能够遵循以下参数：VFA (r(2)=0.94)，乙酸（r(2)=0.69），丙酸（r(2)=0.89）。
Recently biogas production from agricultural sources has rapidly developed. Therefore the demands on biogas plants to optimise the efficiency of the anaerobic digestion (AD) process have grown immensely. At present there is no online-supervision tool available to monitor the AD process, but costly and time-consuming chemical analyses are necessary. The possibility to use near-infrared spectroscopy (NIRS) in order to track relevant process parameters like total volatile fatty acids (VFA), acetic acid and propionic acid was investigated in the present research project. A NIR-sensor was integrated into a full-scale 1 MW biogas plant and NIR-spectra of the fermenter contents were recorded semi-continuously for 500 days. Weekly samples were taken and analysed for the above mentioned parameters. Calibration models were calculated, capable of following these parameters: VFA (r(2)=0.94), acetic acid (r(2)=0.69), propionic acid (r(2)=0.89).