Abstract
Two modified Ludzack-Ettinger (MLE)-type membrane-coupled bioreactors (MBRs) were investigated in this study for the purpose of removing both nitrogenous and carbonaceous pollutants from a synthetic wastewater. During the first MBR experiment, removal efficiencies were high (>90%) for chemical oxygen demand (COD) and ammonia, but total nitrogenous pollutant removal efficiency was poor (approximately 25%). Bacterial community analysis of ammonia oxidizing bacteria (AOB) by a nested PCR-DGGE approach detected two Nitrosomonas-like populations and one Nitrosospira-like population. During the initial portion of the second MBR experiment, COD and ammonia removal efficiencies were similar to the first MBR experiment until the COD of the influent wastewater was increased to provide additional electron donors to support denitrification. Total nitrogen removal efficiencies eventually exceeded 90%, with a hydraulic residence time (HRT) of 24 h and a recirculation ratio of 8. When the HRT of the MBR experiment was decreased to 12 h, however, ammonia removal efficiency was adversely affected. A subsequent increase in the HRT to 18 h helped improve removal efficiencies for both ammonia (>85%) and total nitrogenous compounds (approximately 7...Continue Reading
References
Aug 1, 1972·Analytical Biochemistry·E F Hartree
Mar 1, 1993·Applied and Environmental Microbiology·G MuyzerA G Uitterlinden
Aug 1, 1996·Journal of Bacteriology·B BaumannJ R Van Der Meer
Sep 1, 1996·Applied and Environmental Microbiology·A KonopkaR F Turco
Apr 1, 1997·Applied and Environmental Microbiology·G A KowalchukJ W Woldendorp
Feb 6, 1998·FEMS Microbiology Reviews·F von WintzingerodeE Stackebrandt
Dec 1, 2000·Applied and Environmental Microbiology·U PurkholdM Wagner
Jul 21, 2001·Journal of Industrial Microbiology & Biotechnology·T M LaParaJ E Alleman
Dec 26, 2001·Nucleic Acids Research·Dennis A BensonDavid L Wheeler
Feb 6, 2002·Water Research·S RosenbergerM Kraume
Aug 16, 2002·Current Opinion in Biotechnology·Michael Wagner, Alexander Loy
Oct 26, 2002·Microbial Ecology·T M LaParaA Konopka
Feb 7, 2003·Applied and Environmental Microbiology·David M StamperRachel N Jacobs
Feb 25, 2003·Biotechnology and Bioengineering·Christian G Klatt, Timothy M LaPara
Mar 20, 1996·Biotechnology and Bioengineering·K Brindle, T Stephenson
Mar 1, 2003·FEMS Microbiology Ecology·Arlene K RowanIan M Head
Citations
Jan 19, 2008·Journal of Industrial Microbiology & Biotechnology·Ruoyu D ChenTimothy M LaPara
Dec 23, 2006·Journal of Industrial Microbiology & Biotechnology·A Franco-RiveraJ Zamora-Castro
Feb 5, 2013·Biotechnology Progress·Asma Saeed, Muhammad Iqbal