Mendes Carlos, Esquerre Karla, Matos Queiroz Luciano
Federal University of Bahia, Salvador-Ba, Brazil.
Waste Manag. 2015 Jan;35:89-95. doi: 10.1016/j.wasman.2014.10.013. Epub 2014 Nov 4.
Improving anaerobic digestion of sewage sludge by monitoring common indicators such as volatile fatty acids (VFAs), gas composition and pH is a suitable solution for better sludge management. Modeling is an important tool to assess and to predict process performance. The present study focuses on the application of the Anaerobic Digestion Model No. 1 (ADM1) to simulate the dynamic behavior of a reactor fed with sewage sludge under mesophilic conditions. Parametric sensitivity analysis is used to select the most sensitive ADM1 parameters for estimation using a numerical procedure while other parameters are applied without any modification to the original values presented in the ADM1 report. The results indicate that the ADM1 model after parameter estimation was able to predict the experimental results of effluent acetate, propionate, composites and biogas flows and pH with reasonable accuracy. The simulation of the effect of organic shock loading clearly showed that an organic shock loading rate above of 35kg/m(3) day affects the performance of the reactor. The results demonstrate that simulations can be helpful to support decisions on predicting the anaerobic digestion process of sewage sludge.
通过监测挥发性脂肪酸（VFA）、气体成分和pH值等常见指标来改善污水污泥的厌氧消化，是实现更好的污泥管理的合适解决方案。建模是评估和预测工艺性能的重要工具。本研究重点在于应用一号厌氧消化模型（ADM1）来模拟中温条件下以污水污泥为进料的反应器的动态行为。参数敏感性分析用于通过数值程序选择最敏感的ADM1参数进行估算，而其他参数则直接采用ADM1报告中给出的原始值，不做任何修改。结果表明，经过参数估算后的ADM1模型能够较为准确地预测出水乙酸盐、丙酸盐、混合成分和沼气流量以及pH值的实验结果。有机冲击负荷影响的模拟结果清楚地表明，有机冲击负荷率高于35kg/m³·天会影响反应器的性能。结果表明，模拟有助于为预测污水污泥厌氧消化过程的决策提供支持。
