Variation in methane concentration produced from anaerobically digested vegetables

H. Mousa*, M. Silwadi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Anaerobic fermentation is a highly promising technology for converting biomass waste into methane, which then may directly be used as an energy source. Attempts have been made to optimize various parameters in order to determine the most favorable recipe for maximum biogas production from fermented vegetable waste. The biogas production from many types of vegetable waste such as zucchini, orange peel, tomato, potato, and rice was studied in batch digesters. The effect ofadding chicken dung and sludge to vegetable waste on the concentration of methane in the produced biogas was investigated. The experiments were conducted at room temperature (20°C) and at 35°C. The results revealed that methane concentration goes through maximum value with time. This maximum value is obtained faster when the rate of digestion is faster. The concentrations of methane in the biogas produced are ranked as follows: potato>rice>tomato>zucchini>orange peels. The concentrations of methane gas increased as chicken dung and sludge were mixed with the vegetables. Themaximum value of methane concentration is reached faster in a mixture of chicken dung and sludge. For both chicken dung and sludge, the maximum value is reached at the same time.

Original languageEnglish
Pages (from-to)32-40
Number of pages9
JournalJournal of Engineering Research
Issue number2
Publication statusPublished - 2015


  • Anaerobic digestion
  • Biogas
  • Carbon dioxide
  • Chicken dung
  • Fermentation
  • Methane
  • Renewable energy
  • Sludge

ASJC Scopus subject areas

  • Engineering(all)


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