Modified ADM1 structure for modelling municipal primary sludge hydrolysis

H. Yasui, R. Goel, Y. Y. Li, T. Noike

研究成果: Article査読

52 被引用数 (Scopus)


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.

ジャーナルWater Research
出版ステータスPublished - 2008 1月

ASJC Scopus subject areas

  • 生態モデリング
  • 水の科学と技術
  • 廃棄物管理と処理
  • 汚染


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