Fungal bioaugmentation of anaerobic digesters fed with lignocellulosic biomass: What to expect from anaerobic fungus Orpinomyces sp.

Akyol C., İnce O., Bozan M., Ozbayram E. G., Ince B.

BIORESOURCE TECHNOLOGY, cilt.277, ss.1-10, 2019 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 277
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.biortech.2019.01.024
  • Dergi Adı: BIORESOURCE TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1-10
  • Anahtar Kelimeler: Anaerobic digestion, Anaerobic fungus, Bioaugmentation, Cereal crops, Lignocellulosic biomass, Metagenomics, ENHANCE BIOGAS PRODUCTION, METHANE PRODUCTION, CO-DIGESTION, WHEAT-STRAW, PRETREATMENT, BACTERIA, CULTURES, WASTE
  • İstanbul Üniversitesi Adresli: Hayır

Özet

Energy-efficient biogas reactors are often designed and operated mimicking natural microbial ecosystems such as the digestive tracts of ruminants. Anaerobic fungi play a crucial role in the degradation of lignocellulose-rich fiber thanks to their high cellulolytic activity. Fungal bioaugmentation is therefore at the heart of our understanding of enhancing anaerobic digestion (AD). The efficiency of bioaugmentation with anaerobic fungus Orpinomyces sp. was evaluated in lignocellulose-based AD configurations. Fungal bioaugmentation increased the methane yield by 15-33% during anaerobic co-digestion of cow manure and selected cereal crops/straws. Harvesting stage of the crops was a decisive parameter to influence methane production together with fungal bioaugmentation. A more efficient fermentation process in the bioaugmented digesters was distinguished by relatively-higher abundance of Synergistetes, which was mainly represented by the genus Anaerobaculum. On the contrary, the composition of the methanogenic archaea did not change, and the majority of methanogens was assigned to Methanosarcina.