Biodegradation of medicinal plants waste in an anaerobic digestion reactor for biogas production

Kabir Fardad, Bahman Najafi, Sina Faizollahzadeh Ardabili, Amir Mosavi, Shahaboddin Shamshirband, Timon Rabczuk

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Glycyrrhiza glabra, Mint, Cuminum cyminum, Lavender and Arctium medicinal are considered as edible plants with therapeutic properties and as medicinal plants in Iran. After extraction process of medicinal plants, residual wastes are not suitable for animal feed and are considered as waste and as an environmental threat. At present there is no proper management of waste of these plants and they are burned or buried. The present study discusses the possibility of biogas production from Glycyrrhiza Glabra Waste (GGW), Mentha Waste (MW), Cuminum Cyminum Waste (CCW), Lavender Waste (LW) and Arctium Waste (AW). 250 g of these plants with TS of 10% were digested in the batch type reactors at the temperature of 35°C. The highest biogas production rate were observed to be 13611 mL and 13471 mL for CCW and GGW (10% TS), respectively. While the maximum methane was related to GGW with a value of 9041 mL (10% TS). The highest specific biogas and methane production were related to CCW with value of 247.4 mL. (g.VS)-1 and 65.1 mL.(g.VS)-1, respectively. As an important result, it was obvious that in lignocellulose materials, it cannot be concluded that the materials with similar ratio of C/N has the similar digestion and biogas production ability.

Original languageEnglish
Pages (from-to)318-392
Number of pages75
JournalComputers, Materials and Continua
Issue number3
Publication statusPublished - 2018


  • Biogas
  • Environmental threat
  • Lignocellulose substances
  • Medicinal plants
  • Residual wastes

ASJC Scopus subject areas

  • Biomaterials
  • Modelling and Simulation
  • Mechanics of Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering


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