Selective Isolation and Screening of Actinobacteria Strains Producing Lignocellulolytic Enzymes Using Olive Pomace as Substrate

Lamia Medouni-Haroune (1) , Farid Zaidi (1) , Sonia Medouni-Adrar (1) , Sevastianos Roussos (2) , Samia Azzouz (1) , Veronique Desseaux (3) , Mouloud Kecha (1)

1 UB - Université Abderrahmane Mira [Université de Béjaïa] = University Abderrahmane Mira [University of Béjaïa]
2 IMBE - Institut méditerranéen de biodiversité et d'écologie marine et continentale
3 ISM2 - Institut des Sciences Moléculaires de Marseille

Background: Olive pomace, as the main by-product of the olive oil industry, is recently recycled as fermentation substrate for enzyme production. Objectives: Actinobacteria isolates were separated from an Algerian soil under olive pomace cultivation and were evaluated for their lignocellulolytic enzymes production. Materials and Methods: Isolates of Actinobacteria were separated from soils around oil mills using four isolation media, among them three were enriched by olive pomace. The isolates were screened for their cellulolytic, xylanolytic and ligninolytic activities. Isolates with potential of producing lignocellulose-degrading enzymes were selected under submerged fermentation based olive pomace. Results: Ninety isolates of Actinobacteria were separated from soil samples. M3 medium (raw pomace autoclaved alone) was the best isolation medium (68 strains), whereas, the soil from oil mill with continuous system (S1) led to separation of 52 strains. Among the 90 isolates, 82 were shown promising enzyme activity, 19 isolates were presented the largest zone diameter (< 30 mm). S1M3I and S1M3II isolates were exhibited the highest values. Conclusions: Olive pomace with medium low cost and high titers of enzymes can be valorized by culture of Actinobacteria to produce lignocellulolytic enzymes for industrial applications.

Mots clés: Submerged fermentation; Lignocellulolytic enzymes; Olive pomace; Actinobacteria

Domaines: Biotechnologies; Bactériologie

Lamia Medouni-Haroune, Farid Zaidi, Sonia Medouni-Adrar, Sevastianos Roussos, Samia Azzouz, et al.. Selective Isolation and Screening of Actinobacteria Strains Producing Lignocellulolytic Enzymes Using Olive Pomace as Substrate. Iranian Journal of Biotechnology, 2017, 15 (1), pp.74-77. ⟨10.15171/ijb.1278⟩. ⟨hal-01681534⟩