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Co-digestion of Laminaria digitata with cattle manure: A unimodel simulation study of both batch and continuous experiments

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  • Hao Sun, China Agricultural University, Technical University of Denmark
  • ,
  • Adam Kovalovszki, Technical University of Denmark
  • ,
  • Panagiotis Tsapekos, Technical University of Denmark
  • ,
  • Merlin Alvarado-Morales, Technical University of Denmark
  • ,
  • Amata Rudatis, Technical University of Denmark
  • ,
  • Shubiao Wu
  • Renjie Dong, China Agricultural University
  • ,
  • Panagiotis G. Kougias, Technical University of Denmark, NAGREF
  • ,
  • Irini Angelidaki, Technical University of Denmark

This work investigated the thermophilic (55 °C) co-digestion performance both in batch and continuous mode operation. The biochemical methane potentials of L. digitata and cattle manure were 308 ± 24 and 203 ± 33 mL CH4/g VS, respectively. The optimum co-digestion feedstock ratio was found to be 80% macroalgae: 20% manure on a volatile solids basis, which produced 290 ± 19 mL CH4/g VS under long-term and stable continuous operation at an organic loading rate of 2 g VS/L/d and hydraulic retention time of 15 days. Simulations of the batch and continuous experiments were, for the first time, carried out using an integrated anaerobic bioconversion model without structural modifications. Close fits between measured and simulated data provided mutual confirmation of experimental reliability and model robustness, and provided new perspectives for the use of the software tool.

Original languageEnglish
JournalBioresource Technology
Pages (from-to)361-368
Number of pages8
Publication statusPublished - Mar 2019

    Research areas

  • Cattle manure, Co-digestion, Laminaria digitata, Macroalgae, Modeling

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