Simulation of anaerobic degradation processes using the Anaerobic Digestion Model No. 1 (ADM1)

使用厌氧消化模型模拟厌氧降解过程。

• 批准号: 189900917
• 负责人: Professor Dr.-Ing. Karl-Heinz Rosenwinkel
• 金额: --
• 依托单位: Institut für Siedlungswasserwirtschaft und Abfalltechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/189900917?language=en
• 关键词: Simulation; anaerobic; degradation; processes; using

Anaerobic methods are state of the art in many areas of industrial wastewater treatment. However, the four-stage anaerobic process reacts very sensitively to variations of the boundary conditions and to load changes. Therefore, the plants can often not operate at their optimal levels. Dynamic models can contribute to a better understanding of the process and can be used for the examination of various influencing factors. During the first two years of the project, the results of different laboratory investigations with starch wastewater and several synthetic substrates were used to determine substrate and biomass specific parameters and to calibrate the Anaerobic Digestion Model No. 1 (ADM1). In addition, the lactic acid fermentation was incorporated in the ADM1 for accurate simulation of the glucose degradation. The extended model was validated using the data of a second laboratory plant; it could be successfully used to predict main relevant process parameters (like gas quality, gas quantity, COD and VFA in the effluent, pH in reactor). However, the methane production for some of the load tests shows a high methane peak in the simulations results which could not have been observed in the experimental results. This indicates that inhibitions may occur during load tests which are not yet implement in the model. Furthermore, inhibition due to product accumulation is not considered in most of the processes in the ADM1. Therefore, even endergonic reactions are simulated with positive rates. Therefore, these points will be investigated during the intended second part of the project as follows: - Investigation of pH and VFA inhibition of the anaerobic process in order to optimize the inhibition function implemented in ADM1 - Implementation of Gibbs energy calculation depending on actual conditions into ADM1 in order to predict the reaction direction.

厌氧方法是工业废水处理的许多领域中的最新技术。然而，四级厌氧过程对边界条件的变化和负荷的变化反应非常敏感。因此，工厂通常不能在其最佳水平上运行。动态模型有助于更好地理解过程，并可用于检查各种影响因素。在该项目的前两年，不同的实验室调查结果与淀粉废水和几种合成基质被用来确定基质和生物量的具体参数，并校准厌氧消化模型1号（ADM 1）。此外，乳酸发酵被纳入到ADM 1中，以准确模拟葡萄糖降解。使用第二个实验室工厂的数据对扩展模型进行了验证;它可以成功地用于预测主要相关工艺参数（如气体质量、气体量、流出物中的COD和VFA、反应器中的pH）。然而，一些负载测试的甲烷产量在模拟结果中显示出高甲烷峰值，这在实验结果中无法观察到。这表明，抑制可能会发生在负载测试尚未实现的模型。此外，在ADM 1的大多数工艺中未考虑产物蓄积引起的抑制。因此，即使是吸能反应也是用正速率模拟的。因此，这些要点将在项目的第二部分进行研究，具体如下：-研究厌氧过程的pH和VFA抑制，以优化ADM 1中实施的抑制功能-根据实际条件在ADM 1中实施吉布斯能计算，以预测反应方向。