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

Hao Sun, Adam Kovalovszki, Panagiotis Tsapekos, Merlin Alvarado-Morales, Amata Rudatis, Shubiao Wu, Renjie Dong, Panagiotis Kougias*, Irini Angelidaki

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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
Volume276
Pages (from-to)361-368
ISSN0960-8524
DOIs
Publication statusPublished - 2019

Keywords

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

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