【正文】 998。 Keller et al., 1997。 Kagi and Uygur,2002). However, the MSBR system showed a higher TKNremoval efficiency than the SBR system because thetotal biosludge mass of the MSBR was higher than thatof the SBR system. Also, the biosludge of the MSBRsystem was more settled, because the SRT of the MSBRsystem was higher than the SRT of the SBR system (Metcalfamp。 Eddy, 1991。 Gebara, 1999。 Irvine and Busch, 1979。Keller et al., 1997).In application, the MSBR system could be suitable foruse in the treatment of milk industry wastewater due to thehigh organic carbon and nitrogen removal efficiencies, goodquality of biosludge, and low amount of excess biosludgewaste. The optimal removal efficiency of the MSBR systemwith milk industrial wastewater was observed under anorganic loading of up to 680 g BOD5/m3 d.AcknowledgementsThe author wishes to express deep thanks to theDepartment of Environmental Technology, King Mongkut’sUniversity of Technology Thonburi and the ChinSophonpanith Foundation for providing the researchmaterials, equipment and funds.ReferencesAPHA, AWWA, WPCF, 1995. Standard Method for Examination of Waterand Wastewater. American Public Health Association, Washington,DC, pp. 535–536.Barnett, ., Kerridge, ., Russell, ., 1994. Effluent treatment systemfor the dairy industry. Australian Biotechnology 4, 26–30.Bernet, ., Nicolas, D., Philipe, J., Moletta, R., 2000. Effects of oxygensupply methods on the performance of a sequencing batch reactor forhigh ammonia nitrification. Water Environmental Research 72, 195–200.Cecen, F., Orak, E., 1996. Nitrification of fertilizer wastewater in a biofilmreactor. Journal of Chemical Technology and Biotechnology 65, 229–238.Chudoba, P., Pannier, M., Truc, A., Pujol, R., 1998. A new fixed filmmobile bed bioreactor for denitrification of wastewater. Water Scienceand Technology 38 (8/9), 233–240.Department of Industrial Works, 2001. Fundamental of Pollution Prevention(Cleaner Technology) for Dairy Product and Drinking Milk.Department of industrial works, Ministry of Industry, Thailand. 11510 (Thai).Garrido, ., Omil, F., Arrojo, B., Mendez, R., Lema, ., 2001. Carbonand nitrogen removal from a wastewater of an industrial dairylaboratory with a coupled anaerobic filtersequencing batch reactorsystem. Water Science and Technology 43 (3), 249–256.Gebara, F., 1999. Activated sludge biofilm wastewater treatment system.Water Research 43 (1), 230–238.Helmer, C., Kunst, S., 1998. Simultaneous nitrification/denitrification in anaerobic biofilm system. Water Research 37 (4/5), 183–187.Ince, O., 1998. Performance of twophase anaerobic digestion system whentreating dairy wastewater. Water Research 32 (9), 2707–2713.Irvine, ., Busch, ., 1979. Sequencing batch biological reactor—an overview. Journal Water Pollution Control Federation 51 (2),235–243.Kagi, F., Uygur, A., 2002. Nutrient removal performance of a sequencingbatch reactor as a function of the sludge age. Enzyme and MicrobialTechnology 31, 842–847.Keller, J., Subramaniam, K., Gosswein, J., Greenfield, ., 1997. Nutrientremoval from industrial wastewater using single tank sequencing batchreactors. Water Science and Technology 35 (6), 137–144.Metcalf amp。 Eddy, 1991. Wastewater Engineering: Treatment DisposalReuse, third ed. McGrawHill, Singapore, pp. 529–756.Perle, M., Kimichic, S., Shelf, G., 1995. Some biochemical aspects of theanaerobic degradation of dairy wastewater. Water Research 29 (6),1549–1554.Rusten, B., Lundar, ., Eick, ., 1993. Chemical pretreatment of dairywastewater. Water Science and Technology 28 (2), 67–76.SAS Institute, 1996. The SAS System for Windows, Version . SASInstitute, Cary, NC.Shin, ., Lee, ., Seok, I., 1998. Pilot scale SBR and MF operation forthe removal of organic and nitrogen pounds from greywater. WaterScience and Technology 38 (6), 79–88.Sirianuntapiboon, S., Tondee, T., 2000. Application of packed cage RBCsystem for treating wastewater contaminated with nitrogenous pounds.Thammasat International Journal of Science and Technology 5(1), 28–39.Viraraghavan, T., 1994. Pollution control in the dairy industry. ProcessEngineering for Pollution Control and Waste May, 705–713.Wanner, J., Kucman, K., Grau, ., 1998. Activated sludgeprocess bined with biofilm cultivation. Water Research 22,207–215.Watanabe, Y., Okabe, S., Arata, T., Haruta, Y., 1994. Study on theperformance of an upflow aerated biofilter (UAB) in municipalwastewater treatment. Water Science Technology 30 (11), 25–35.Wilen, ., Balmer, P., 1998. Short term effects of dissolved oxygenconcentration on the turbidity of the supernatant of activated sludge.Water Science and Technology 38 (3), 25–33.Zayed, G., Winter, J., 1998. Removal of organic pollutants and of nitratefrom wastewater from the dairy industry by denitrification. AppliedMicrobiology and Biotechnology 49, 469–47