title: Anaerobic digestion of wastewater from the fruit juice industry: experiments and modeling.
abstract: Anaerobic digestion of wastewater from the fruit juice industry was carried out in a batch digester. To study the effect of the pH values as well as the nutrient medium on the fermentation process, different parameters were monitored under mesophilic temperature, such as cumulative biogas volume, chemical oxygen demand (COD), total sugar, and biomass growth. It was found that for all cases, the COD concentration decreased with time. The lowest value reached was obtained when the nutrient medium was added; it was about 110 g/L after 480 h. In such cases, the COD removal reached about 80%; the highest cumulative biogas volume of about 5,515.8 NmL was reached after 480 h testing; and the lowest value reached was about 2,862.3 NmL in the case of peach-substrate containing sodium sulfite. The addition of nutrient medium improved the cumulative biogas production as well as the COD abatement. Measurement of the biogas composition highlighted three gaseous components, namely, methane (56.52%), carbon dioxide (20.14%), and hydrogen sulfide (23.34%). The modified Gompertz equation and the first-order kinetic model were used to describe the cumulative biogas production and the organic matter removal, respectively. A good agreement was found between simulated and experimental data.
authors.affiliation: Faculté de Génie Mécanique et Génie des Procédés, Laboratoire Phénomènes de transfert, Université des Sciences et de la Technologie Houari Boumediene (USTHB), Bab-Ezzouar, Algiers 16111, Algeria E-mail: souhaib.zerrouki@gmail.com.
authors.forename: Souhaib
authors.initials: S
authors.lastname: Zerrouki
authors.affiliation: Faculté de Génie Mécanique et Génie des Procédés, Laboratoire Phénomènes de transfert, Université des Sciences et de la Technologie Houari Boumediene (USTHB), Bab-Ezzouar, Algiers 16111, Algeria E-mail: souhaib.zerrouki@gmail.com.
authors.forename: Rachida
authors.initials: R
authors.lastname: Rihani
authors.affiliation: Faculté de Génie Mécanique et Génie des Procédés, Laboratoire Phénomènes de transfert, Université des Sciences et de la Technologie Houari Boumediene (USTHB), Bab-Ezzouar, Algiers 16111, Algeria E-mail: souhaib.zerrouki@gmail.com.
authors.forename: Fatiha
authors.initials: F
authors.lastname: Bentahar
authors.affiliation: Department of Soil Sciences and Agri-Food Engineering, Université Laval, Québec, QC G1V 0A6, Canada.
authors.forename: Khaled
authors.initials: K
authors.lastname: Belkacemi
mesh_terms: D000693:Anaerobiosis; D001628:Beverages / Q000032:analysis*; D056804:Biofuels / Q000032:analysis; D057919:Biological Oxygen Demand Analysis; D002245:Carbon Dioxide / Q000737:chemistry; D004063:Digestion; D007220:Industrial Waste / Q000032:analysis*; D007700:Kinetics; D008962:Models, Theoretical; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D056804:Biofuels; D002245:Carbon Dioxide; D007220:Industrial Waste; D062065:Wastewater