title: Simultaneous removal of organic matter and nitrogen compounds by combining a membrane bioreactor and a membrane biofilm reactor.
abstract: Hydrogen-based membrane biofilm reactors (MBfR) have been applied to the denitrification of nitrate-containing water and wastewater. Adding an aerobic membrane bioreactor (MBR) to a MBfR provides significant nitrification and organic oxidation because most wastewater also contains a significant concentration of organic material and ammonium nitrogen. This study describes experiments that investigate the removal of organic and nitrogenous compounds in the combined MBR/MBfR system. The experiments demonstrate that the MBR/MBfR combination successfully performs COD oxidation and nitrogen removal for organic and ammonium loads in the ranges of 1000-4300gCOD/m(3)-d and 200-230gN/m(3)-d, respectively. Total-nitrogen removal was controlled by nitrification in the MBR, because the MBfR denitrified all of the NO(3)(-) provided by the MBR. The nitrate flux in the MBfR was in the range of 4-8gN/m(2)-d for cases of almost complete denitrification (>99 %); the H(2) flux was varied from 1.4 to 2.8gH(2)/m(2)-d.
authors.affiliation: Department of Environmental Engineering, Faculty of Engineering, Firat University, Elazig, Turkey. hhasar@firat.edu.tr
authors.forename: Halil
authors.initials: H
authors.lastname: Hasar
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D018929:Cell Culture Techniques / Q000295:instrumentation*; D045424:Complex Mixtures / Q000302:isolation & purification / Q000378:metabolism; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008567:Membranes, Artificial; D008954:Models, Biological; D017672:Nitrogen Compounds / Q000302:isolation & purification / Q000378:metabolism*; D009930:Organic Chemicals / Q000302:isolation & purification / Q000378:metabolism*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism; D018508:Water Purification / Q000379:methods*
chemical_list: D045424:Complex Mixtures; D008567:Membranes, Artificial; D017672:Nitrogen Compounds; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical