title: Hydrothermal carbonization of olive mill wastewater.
abstract: Hydrothermal carbonization (HTC) is an emerging technology to treat wet biomasses aimed at producing a biochar material. Herein, olive mill wastewater (OMW) was subjected to HTC. Mass balance considerations provide evidence that the yield of biochar is low (~30%, w/w), which is associated with a low fraction of carbohydrates in OMW. The combination of different preparation schemes, pre-chromatographic derivatization reactions and GC/MS analysis for the analysis of organic compounds in aqueous HTC-solutions allowed to identify and quantify a wide array of analytes which belong either to intrinsic constituents of OMW or to characteristic HTC-breakdown products. Biophenols, such as hydroxyl-tyrosol (OH-Tyr), tyrosol (Tyr) account for the most abundant members of the first group. Most abundant breakdown products include phenol and benzenediols as well as short-chain organic acids. Secoiridoids, such as decarbomethoxy ligostride aglycon and decarbomethoxy oleuropein aglycon, all of them being typical components of OMW, are less abundant in HTC-solutions.
authors.affiliation: UFZ-Helmholtz Center for Environmental Research, Department of Environmental Engineering, Leipzig, Germany. juergen.poerschmann@ufz.de
authors.forename: J
authors.initials: J
authors.lastname: Poerschmann
authors.forename: I
authors.initials: I
authors.lastname: Baskyr
authors.forename: B
authors.initials: B
authors.lastname: Weiner
authors.forename: R
authors.initials: R
authors.lastname: Koehler
authors.forename: H
authors.initials: H
authors.lastname: Wedwitschka
authors.forename: F-D
authors.initials: FD
authors.lastname: Kopinke
mesh_terms: D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000737:chemistry*; D007220:Industrial Waste / Q000032:analysis*; D008970:Molecular Weight; D031658:Olea / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry; D012996:Solutions; D013696:Temperature; D062065:Wastewater / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D002244:Carbon; D007220:Industrial Waste; D009930:Organic Chemicals; D012996:Solutions; D062065:Wastewater; D014867:Water