7Yamamoto K. Household membrane bioreactor in domestic wastewater treatment. Wat. Sci. Tech. , 1993, 27 (1):171 -178.
8Masuda S. , Watanable Y. , Ishiguro M. Bio-film properties and simultaneous nitrification and denitrification in aerobic rotating biological contactors. Wat. Sci. Tech. , 1991,23(12) :1355 - 1363.
9Halling-Sorensen B. , Hjuler H. Simultaneous nitrification and denitrification with and upflow fixed bed reactor applying clinoptilolite as media. Wat. Treat. , 1992,7 : 77 -88.
10Moriyama K. , Sato K. , Harada Y. , et al. Simultaneous biological-removal of nitrogen and phosphorus using oxic-anaerobic-oxic process. Wat. Sci. Tech. ,1990,22 (7 -8) :61 -66.
