title: Co-composting of rose oil processing waste with caged layer manure and straw or sawdust: effects of carbon source and C/N ratio on decomposition.
abstract: Rose oil is a specific essential oil that is produced mainly for the cosmetics industry in a few selected locations around the world. Rose oil production is a water distillation process from petals of Rosa damascena Mill. Since the oil content of the rose petals of this variety is between 0.3-0.4% (w/w), almost 4000 to 3000 kg of rose petals are needed to produce 1 kg of rose oil. Rose oil production is a seasonal activity and takes place during the relatively short period where the roses are blooming. As a result, large quantities of solid waste are produced over a limited time interval. This research aims: (i) to determine the possibilities of aerobic co-composting as a waste management option for rose oil processing waste with caged layer manure; (ii) to identify effects of different carbon sources - straw or sawdust on co-composting of rose oil processing waste and caged layer manure, which are both readily available in Isparta, where significant rose oil production also takes place; (iii) to determine the effects of different C/N ratios on co-composting by the means of organic matter decomposition and dry matter loss. Composting experiments were carried out by 12 identical laboratory-scale composting reactors (60 L) simultaneously. The results of the study showed that the best results were obtained with a mixture consisting of 50% rose oil processing waste, 64% caged layer manure and 15% straw wet weight in terms of organic matter loss (66%) and dry matter loss (38%).
authors.affiliation: Department of Agricultural Machinery, Suleyman Demirel University, Isparta, Turkey emrah.onursal@gmail.com.
authors.forename: Emrah
authors.initials: E
authors.lastname: Onursal
authors.affiliation: Department of Agricultural Machinery, Suleyman Demirel University, Isparta, Turkey.
authors.forename: Kamil
authors.initials: K
authors.lastname: Ekinci
mesh_terms: D000332:Aerobiosis; D002244:Carbon / Q000378:metabolism; D001467:Hordeum; D007220:Industrial Waste / Q000032:analysis*; D008372:Manure / Q000032:analysis; D009584:Nitrogen / Q000378:metabolism; D009822:Oils, Volatile / Q000737:chemistry*; D028223:Pinus; D027826:Rosa / Q000737:chemistry*; D018505:Waste Management / Q000379:methods*; D014934:Wood / Q000032:analysis
chemical_list: D007220:Industrial Waste; D008372:Manure; D009822:Oils, Volatile; D002244:Carbon; D009584:Nitrogen
keywords: Organic matter loss; caged layer manure; dry matter loss; laboratory scale composting