title: Modified kinetic-hydraulic UASB reactor model for treatment of wastewater containing biodegradable organic substrates.
abstract: This paper addresses a modified kinetic-hydraulic model for up-flow anaerobic sludge blanket (UASB) reactor aimed to treat wastewater of biodegradable organic substrates as acetic acid based on Van der Meer model incorporated with biological granules inclusion. This dynamic model illustrates the biomass kinetic reaction rate for both direct and indirect growth of microorganisms coupled with the amount of biogas produced by methanogenic bacteria in bed and blanket zones of reactor. Moreover, the pH value required for substrate degradation at the peak specific growth rate of bacteria is discussed for Andrews' kinetics. The sensitivity analyses of biomass concentration with respect to fraction of volume of reactor occupied by granules and up-flow velocity are also demonstrated. Furthermore, the modified mass balance equations of reactor are applied during steady state using Newton Raphson technique to obtain a suitable degree of freedom for the modified model matching with the measured results of UASB Sanhour wastewater treatment plant in Fayoum, Egypt.
authors.affiliation: Sanitary and Environmental Engineering, Civil Engineering Department, Faculty of Engineering, Cairo University, Cairo, Egypt E-mail: mostafaelseddek@yahoo.com.
authors.forename: Mostafa M
authors.initials: MM
authors.lastname: El-Seddik
authors.affiliation: Sanitary and Environmental Engineering, Civil Engineering Department, Faculty of Engineering, Cairo University, Cairo, Egypt E-mail: mostafaelseddek@yahoo.com.
authors.forename: Mona M
authors.initials: MM
authors.lastname: Galal
authors.affiliation: Engineering Mathematics Department, Faculty of Engineering, Cairo University, Cairo 12613, Egypt and NISC Research Center, Nile University, Giza, Egypt.
authors.forename: A G
authors.initials: AG
authors.lastname: Radwan
authors.affiliation: Sanitary and Environmental Engineering, Civil Engineering Department, Faculty of Engineering, Cairo University, Cairo, Egypt E-mail: mostafaelseddek@yahoo.com.
authors.forename: Hisham S
authors.initials: HS
authors.lastname: Abdel-Halim
mesh_terms: D018533:Biomass; D019149:Bioreactors; D004534:Egypt; D007700:Kinetics; D008962:Models, Theoretical; D012722:Sewage / Q000737:chemistry; D064091:Waste Disposal Facilities; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D012722:Sewage; D062065:Wastewater