title: Valorization of solid olive mill wastes by cultivation of a local strain of edible mushrooms.
abstract: Olive oil industry generates huge quantities of solid olive mill wastes (SOMW), causing environmental damage. Cultivation of edible mushrooms, such as Pleurotus ostreatus is a valuable approach for SOMW valorization. A local strain mycelium (Tizi-Ouzou, Algeria) of P. ostreatus (LPO) was isolated from castor oil plants. Oyster mushroom spawn, produced on barley grains, was used to inoculate wet SOMW, steamed in a traditional steamer during 45 min. The mycelium growth rate on SOMW was first estimated in Petri dish by measuring the surface colonized by the mycelium. The fruit body yields were estimated on culture bags containing 2 kg each of SOMW inoculated at 7% (w/w). The local strain potential was compared with that of a commercial one. Both strains produced high-quality mushrooms, but with low yields. The supplementation of the SOMW with wheat straw at the rate of 10% and 2% of CaCO3 had significantly enhanced the productivity of the two strains, multiplying it by 3.2 for LPO and by 2.6 for CPO.
authors.affiliation: Laboratoire de production, amélioration et protection des végétaux et des denrées stockées, faculté des sciences biologiques et des sciences agronomiques, université Mouloud-Mammeri, Tizi-Ouzou, Algeria. Electronic address: mansour_benamar@yahoo.fr.
authors.forename: Malika
authors.initials: M
authors.lastname: Mansour-Benamar
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Savoie
authors.forename: Louis
authors.initials: L
authors.lastname: Chavant
mesh_terms: D000383:Agriculture / Q000295:instrumentation / Q000379:methods*; D000462:Algeria; D000818:Animals; D001673:Biodegradation, Environmental; D002119:Calcium Carbonate; D018556:Crops, Agricultural / Q000254:growth & development / Q000378:metabolism*; D005525:Food-Processing Industry; D008018:Life Cycle Stages; D025282:Mycelium / Q000254:growth & development; D031658:Olea; D000069463:Olive Oil; D010938:Plant Oils; D018547:Plant Stems; D020076:Pleurotus / Q000145:classification / Q000254:growth & development / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*; D013045:Species Specificity; D014908:Triticum
chemical_list: D000069463:Olive Oil; D010938:Plant Oils; D002119:Calcium Carbonate
keywords: Grignon d’olive; Local strain; Paille de blé; Pleurotus ostreatus; Solid olive mill wastes; Souche locale; Valorisation; Valorization; Wheat straw