8Kuba T,Van Loosdrecht M C M,Heijnen J J.Phosphorus and nitrogen removal with minimal COD requirement by integration of nitrification in a two-sludge system[J].Water Res,1996,30 (7):1702-1710.
9APHA.Standard Methods for the Examination of Water and Wastewater[M]..Washington:American Public Health Association,American Water Works Association and Water Environment Federation,1992.
10Yuan Zhiguo,Adrian Oehmen,Pernille Ingildsen.Control of nitrate recirculation flow in predinitrification systems[J].Water Sci Technol,2002,45 (4 -5):29 -36.