Department of Biosystems Engineering, Faculty of Agricultural Sciences, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark.
Bioresour Technol. 2011 Mar;102(5):4098-103. doi: 10.1016/j.biortech.2010.12.052. Epub 2010 Dec 22.
Four methods of monitoring the anaerobic digestion process were studied at pilot scale. The methods employed were Micro Gas Chromatography (μ-GC) and Membrane Inlet Mass Spectrometry (MIMS) for measurements in the gas phase, Near Infrared Spectroscopy (NIRS) and pH in the liquid phase. Micro Gas Chromatography accurately measured H(2), CH(4), H(2)S, N(2) and O(2) in the headspace whereas the MIMS accurately measured CH(4), CO(2), H(2)S, reduced organic sulfur compounds and p-cresol, also in the headspace. In the liquid phase, NIRS was found to be suitable for estimating the concentrations of acetate, propionate and total volatile fatty acids (VFA) but the error of prediction was too large for accurate quantification. Both the μ-GC and NIRS were low maintenance methods whereas the MIMS required frequent cleaning and background measurements.
四种监测厌氧消化过程的方法在中试规模进行了研究。所采用的方法是微气相色谱（μ-GC）和膜进样质谱（MIMS）测量气相，近红外光谱（NIRS）和液相中的 pH 值。微气相色谱法准确测量了顶部空间中的 H(2)、CH(4)、H(2)S、N(2)和 O(2)，而 MIMS 则准确测量了顶部空间中的 CH(4)、CO(2)、H(2)S、还原有机硫化合物和对甲酚。在液相中，发现 NIRS 适用于估计乙酸盐、丙酸盐和总挥发性脂肪酸（VFA）的浓度，但预测误差太大，无法进行准确的定量。μ-GC 和 NIRS 都是低维护方法，而 MIMS 需要频繁清洗和背景测量。
