Anaerobic co-digestion of acetate-rich with lignin-rich wastewater and the effect of hydrotalcite addition

Research output: Contribution to journalArticleScientificpeer-review


  • Lourdes Rodriguez-Chiang
  • Jordi Llorca
  • Olli Dahl

Research units

  • BarcelonaTech


The methane potential and biodegradability of different ratios of acetate and lignin-rich effluents from a neutral sulfite semi-chemical (NSSC) pulp mill were investigated. Results showed ultimate methane yields up to 333 ± 5 mL CH4/gCOD when only acetate-rich substrate was added and subsequently lower methane potentials of 192 ± 4 mL CH4/gCOD when the lignin fraction was increased. The presence of lignin showed a linear decay in methane production, resulting in a 41% decrease in methane when the lignin-rich feed had a 30% increase. A negative linear correlation between lignin content and biodegradability was also observed. Furthermore, the effect of hydrotalcite (HT) addition was evaluated and showed increase in methane potential of up to 8%, a faster production rate and higher soluble lignin removal (7-12% higher). Chemical oxygen demand (COD) removal efficiencies between 64 and 83% were obtained for all samples.


Original languageEnglish
Pages (from-to)84-91
Number of pages8
JournalBioresource Technology
Publication statusPublished - 1 Oct 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Co-digestion, Evaporator condensate, Hydrotalcite, Lignin, Methane potential

ID: 6597131