Modified ADM1 structure for modelling municipal primary sludge hydrolysis.
Modified ADM1 structure for modelling municipal primary sludge hydrolysis.
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DOI：
10.1016/j.watres.2007.07.004
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发表时间：
2008
期刊：
影响因子：
12.8
通讯作者：
H. Yasui;R. Goel;Y. Y. Li-Y.;T. Noike
中科院分区：
文献类型：
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作者：
H. Yasui;R. Goel;Y. Y. Li-Y.;T. Noike
利用多批次实验的甲烷产率曲线，阐述了初沉污泥颗粒崩解/水解的限速步骤。新鲜初沉污泥的厌氧分批降解表现出一个复杂的MPR曲线标记有两个明确的时间峰。第一个即时峰与相对容易水解的底物的降解相关，而第二个延迟峰与大尺寸颗粒的降解相关。为了模拟第二个延迟峰，有必要考虑更精细的颗粒崩解/水解模型。基于四个数据集的17次运行的厌氧呼吸图，并使用类似于活性污泥模型（ASMs）的基质表征方法，将初沉污泥分为三个具有不同动力学的可生物降解部分。这些是（1）可水解底物（XSettle-I），其显示出对于缓慢生物降解的化合物典型的降解，（2）底物级分（XSettle-II），其具有类似于生物质级分的裂解的降解，和（3）在水解之前需要分解的底物（XSettle-III），其代表初级污泥中的大尺寸颗粒。在此基础上，对厌氧消化模型1（ADM 1）的模型结构进行了改进，以提高厌氧消化池初沉污泥固体降解的模拟能力。
This study elaborates the rate-limiting steps of particle disintegration/hydrolysis of primary sludge using methane production rate (MPR) curves from multiple batch experiments. Anaerobic batch degradation of fresh primary sludge showed a complex MPR curve marked with two well-defined temporal peaks. The first immediate peak was associated with the degradation of relatively readily hydrolysable substrates, while the second delayed peak was associated with the degradation of large-sized particles. For simulating the second delayed peak, it was necessary to consider a more elaborate particle disintegration/hydrolysis model. Based on the anaerobic respirograms of 17 runs in four datasets and using a substrate characterisation approach similar to activated sludge models (ASMs), the primary sludge was classified into three biodegradable fractions having different kinetics. These are (1) a hydrolysable substrate (XSettle-I) showing a degradation typical to slowly biodegradable compounds, (2) a substrate fraction (XSettle-II) having a degradation similar to lysis of biomass fraction and (3) a substrate requiring disintegration before hydrolysis (XSettle-III) representing the large-sized particles in primary sludge. Based on these results, modifications in the model structure of anaerobic digestion model no. 1 (ADM1) are proposed to improve the modelling of primary sludge solid degradation in anaerobic digesters.