APHA, 1998, AWWA, WEF, Standard Methods for the Examination of water and wastewater, 20th edition.
Boller, M., Gujer, W., Tschui, M., 1994, Parameters affecting nitrifying biofilm reactors, Water Science and Technology, 29(10-11), 1-11.
Chen, S., Ling, J., Blancheton, J. P., 2006, Nitrification kinetics of biofilm as affected by water quality factors, Aquacultural Engineering, 34(3), 179-197.
Choi, D. H., Bae, W., Park, S. J., Chung, J. W., 2003, Characteristics of wastewater treatment according to the variation of HRT and DO in biological aerated filter process, J. of KSEE, 25(11), 1337-1343.
Chung, J. C., 1994, Microbial aspects of the biofilm, J. of KSEE, 16(5), 589-600.
Hay, C. T., Khor, S. L., Darren, D. S., James, O. L., 2009, Influence of a prolonged solid retention time environment on nitrification/ denitrification and sludge production in a submerged membrane bioreactor, Desalination 245(1-3), 28-43.
Harremoes, P., 1982, Criteria for nitrification in fixed film reactors, Water Science and Technology, 14(1-2), 167-187.
Kim, M. H., Rah, S. W., Cho, K. K., Park, T. J., 2002a, Nitrogen removal reproducibility from weak organic sewage using pilot scale BNR process applied fixed biofilm, J. of KSEE, 24(6), 995-1003.
Kim, I. T., Park, J. N., Chung, W. S., Song, H. M., 2002b, Removal characteristics of the low concentration sewage discharged into stream by biofilm method, 2002 KSWW&KSWQ fall conference, D31-C34.
Lee, C. G., Kim, J. S., Kang, I. S., Lee, B. H., 1997, A study of attached biomass back washing in fixed film system, J. of the Korean environmental sciences society, 6(3), 219-224.
Lee, L. Y., Ong, S. L., Ng, W. J., 2004, Biofilm morphology and nitrification activities: recovery of nitrifying biofilm particles covered with heterotrophic outgrowth, Bioresource Technology, 95(2), 209-214.
Park, J. B, Park, S. K, Hur, H. W, Kang, H., 2009, Estimation of kinetic coefficient in submerged membrane bioreactor for biological nutrient removal, J. of KSEE, 32(2), 109-113.
Park, Y. S., Song, S. K., 1998, Influence of substrate on the micororganisms attachment and the biofilm growth, J. of KSEE, 20(11), 1579-1589.
Randall, C., Sen, D., 1996, Full-scale evaluation of an integrated fixed-film activated sludge(IFAS) process for enhanced nitrogen removal, Water Science and Technology, 33(12), 155-162.
Rim, J. M., Kwon, J. H., Han, D. J., 1995, Control of excessive biofilm for the treatment of high strength organic wastewater by biofilm process, Korean J. sanitation, 10(3), 67-77.
Ryu, H. D., Lee, S. I., 2006, Comparison of removal characteristics of organic matter, nitorgen and phosphorus in suspended-growth and hybrid processes with hydraulic retention time, J. of KSEE, 28(1), 15-25.
Semmens, M. J., Dahm, K., Shanahan, J., Christianson, A., 2003, COD and nitrogen removal by biofilms growing on gas permeable membranes, Water Research, 37(18), 4343-4350.
Shin, H. S., Lim, K. H., Lee, E. S., Choi, G. W., 1995, Removal of organic contaminants in water supplies by biofilm reactor, J. KSWQ, 11(4), 341-349.
Tijhuis, L., van Loosdrecht, M. C. M., Heijnen, J. J., 1994, Formation and growth of heterotrophic aerobic biofilms on small suspended particles in airlift reactors, Biotechnology Bioengineering, 44(5), 595-608.