Mitigation of NH3 and N2O emissions during food waste digestate composting at C/N ratio 15 using zeolite amendment

Dongyi Li, M. K. Manu, Sunita Varjani, Jonathan W.C. Wong*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

25 Citations (Scopus)


Composting of food waste digestate (FWD) is challenging as it requires more bulking agents, and the nitrogen loss is inevitable. To address these issues, FWD composting was conducted at a relatively lower C/N ratio of 15 with zeolite amendment in the dosage range of 5–15%. The impact of zeolite addition on nitrogen loss, NH3 and N2O emissions was assessed during FWD composting. The results showed that the addition of 10–15% zeolite could significantly reduce the phytotoxic nature of FWD and the compost maturity level could be reached in 10–21 days. Furthermore, ∼45% total nitrogen loss could be reduced by mitigating NH3 and N2O emissions upon 10 and 15% zeolite amendment. The outcome of the present study could be used as an effective strategy for composting FWD in any part of the world as the FWD characteristics are similar irrespective of the type of food waste.

Original languageEnglish
Article number127465
Number of pages10
JournalBioresource Technology
Publication statusPublished - Sept 2022

Scopus Subject Areas

  • Bioengineering
  • Waste Management and Disposal
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment

User-Defined Keywords

  • Compost maturity
  • Food waste digestate
  • NO emission
  • NH emission
  • Nitrogen conservation
  • Zeolite
  • Composting
  • Refuse Disposal/methods
  • Soil
  • Nitrogen/analysis
  • Zeolites
  • Food


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