References
  -  D. Karadag, O.E. Köroğlu, B. Ozkaya, M. Cakmakci, A review
    on anaerobic biofilm reactors for the treatment of dairy industry
    wastewater, Process Biochem., 50 (2015) 262–271. 
-  W. Qasim, A.V. Mane, Characterization and treatment of
    selected food industrial effluents by coagulation and adsorption
    techniques, Water Resour. Ind., 4 (2013) 1–12. 
-  W. Janczukowicz, M. Zieliński, M. Dębowski, Biodegradability
    evaluation of dairy effluents originated in selected sections of
    dairy production, Bioresour. Technol., 99 (2008) 4199–4205. 
-  W. Dąbrowski, R. Żyłka, P. Malinowski, Evaluation of energy
    consumption during aerobic sewage sludge treatment in dairy
    wastewater treatment plant, Environ. Res., 153 (2017) 135–139. 
-  A. Khursheed, R.Z. Gaur, M.K. Sharma, V.K. Tyagi, A.A. Khan,
    A.A.A. Kazmi, Dependence of enhanced biological nitrogen
    removal on carbon to nitrogen and rbCOD to sbCOD ratios
    during sewage treatment in sequencing batch reactor, J. Clean.
    Prod., 171 (2018) 1244–1254. 
-  J. Struk-Sokolowska, Changes of COD fractions share during
    municipal wastewater treatment with big dairy wastewater
    participation, Rocz. Ochr. Środowiska., 13 (2011) 2015–2032. 
-  H.M. van Veldhuizen, M.C.M. van Loosdrecht, J.J. Heijnen,
    Modelling biological phosphorus and nitrogen removal in a full
    scale activated sludge process, Water Res., 33 (1999) 3459–3468. 
-  P.J. Roeleveld, M.C.M. van Loosdrecht, Experience with guidelines
    for wastewater characterisation in The Netherlands,
    Water Sci. Technol., 45 (2002) 77–87. 
-  Z. Dymaczewski, Charakterystyka frakcji organicznych ścieków
    miejskich pod kątem modelu osadu czynnego ASM2d [Analysis
    of organic fractions of municipal sewage according to activated
    sludge ASM2d model], Przem. Chem., 87 (2008) 440–442. 
-  W. Dąbrowski, M. Puchlik, Share of COD fractions in dairy
    wastewater in treatment plant using intensive removal of carbon,
    nitrogen and phosphorus, Annu. Set Environ. Prot., 12
    (2010) 735–746. 
-  S. Xu, B. Hultman, Experiences in wastewater characterization
    and model calibration for the activated sludge process, Water
    Sci. Technol., 33 (1996) 89–98. 
-  A. Carucci, E. Rolle, P. Smurra, Management optimisation of a
    large wastewater treatment plant, Water Sci. Technol., 39 (1999)
    129–136. 
-  M. Henze, W. Gujer, T. Mino, T. Matsuo, M.C. Wentzel, G.v.R.
    Marais, M.C.M. Van Loosdrecht, Activated sludge model
    No.2d, ASM2D, Water Sci. Technol., 39 (1999) 165–182. 
-  D. Brdjanovic, M.C. van Loosdrecht, P. Versteeg, C.M. Hooijmans,
    G.J. Alaerts, J.J. Heijnen, Modeling COD, N and P
    removal in a full-scale WWTP Haarlem Waarderpolder, Water
    Res., 34 (2000) 846–858. 
-  G. Koch, M. Kühni, W. Gujer, H. Siegrist, Calibration and validation
    of activated sludge model no. 3 for Swiss municipal
    wastewater, Water Res., 34 (2000) 3580–3590. 
-  J. Makinia, S.A. Wells, A general model of the activated sludge
    reactor with dispersive flow—I. model development and
    parameter estimation, Water Res., 34 (2000) 3987–3996. 
-  L. Rieger, G. Koch, M. Kühni, W. Gujer, H. Siegrist, The eawag
    bio-p module for activated sludge model no. 3, Water Res., 35
    (2001) 3887–3903. 
-  P. Ginestet, A. Maisonnier, M. Spérandio, Wastewater COD
    characterization: biodegradability of physico-chemical fractions,
    Water Sci. Technol., 45 (2002) 89–97. 
-  M. Wichern, M. Lübken, R. Blömer, K.-H. Rosenwinkel, Efficiency
    of the activated sludge model no. 3 for german wastewater
    on six different WWTPs, Water Sci. Technol., 47 (2003) 211–218. 
-  K. Gernaey, S. Jørgensen, Benchmarking combined biological
    phosphorus and nitrogen removal wastewater treatment processes,
    Control Eng. Pract., 12 (2004) 357–373. 
-  S. Myszograj, Z. Sadecka, COD fractions in mechanical-biological
    sewage treatment on the basis of sewage treatment plant In
    Sulechów, Annu. Set Environ. Prot., 6 (2004) 233–244. 
-  J. Makinia, K.-H. Rosenwinkel, V. Spering, Long-term simulation
    of the activated sludge process at the Hanover-Gümmerwald
    pilot WWTP, Water Res., 39 (2005) 1489–1502. 
-  P. Quevauviller, O. Thomas, A. Van der Beken, eds., Wastewater
    quality monitoring and treatment, John Wiley & Sons,
    Ltd, 2006. 
-  Z. Dymaczewski, Charakterystyka frakcji organicznych
    ścieków miejskich pod kątem modelu osadu czynnego ASM2d,
    Przem. Chem., 87 (2008) 440–442. 
-  I. Pasztor, P. Thury, J. Pulai, Chemical oxygen demand fractions
    of municipal wastewater for modeling of wastewater
    treatment, Int. J. Environ. Sci. Technol., 6 (2009) 51–56. 
-  Z. Sadecka, E. Płuciennik-Koropczuk, Frakcje ChZT w modelach
    biokinetycznych, in: Oczyszcz. Ścieków I Przeróbka
    Osadów Ściekowych, 3rd ed., Oficyna Wydawnicza Uniwersytetu
    Zielonogórskiego, Zielona Góra, 2009. 
-  M. Zawilski, A. Brzeziriska, Variability of COD and TKN
    fractions of combined wastewater, Polish J. Environ. Stud., 18
    (2009) 501–505. 
-  M. Huang, Y. Li, G. Gu, Chemical composition of organic
    matters in domestic wastewater, Desalination, 262 (2010)
    36–42. 
-  J. Struk-Sokolowska, J. Wiater, J. Rodziewicz, Wastewater
    organic compounds characterization on the basis of COD fractions,
    Gaz, Woda I Tech. Sanit., (2016) 92–98. 
-  APHA-AWWA-WEF, Standard Methods for the Examination
    of Water and Wastewater, 18th ed., Washington, USA, 1992. 
-  A. Stanisz, Podstawy statystyki dla prowadzących badania
    naukowe. Odcinek 21: Analiza korelacji. [The basics of statistics
    for conducting research. Episode 21: Correlation analysis],
    10 (2000) 176–181. 
-  A. Khursheed, R.Z. Gaur, A. Bhatia, A.A. Khan, V.K. Tyagi,
    A.A. Kazmi, Role of volume exchange ratio and non-aeration
    time in spillage of nitrogen in continuously fed and intermittently
    decanted sequencing batch reactor, Chem. Eng. J., 191
    (2012) 75–84. 
-  M. Zawilski, A. Brzezińska, Variability of COD and TKN
    fractions of combined wastewater, Polish J. Environ., 18
    (2009) 501–505. 
-  I. Pasztor, P. Thury, J. Pulai, Chemical oxygen demand fractions
    of municipal wastewater for modeling of wastewater
    treatment, Int. J. Environ. Sci. Technol., 6 (2009) 51–56. 
-  K. Gernaey, S. Jørgensen, Benchmarking combined biological
    phosphorus and nitrogen removal wastewater treatment processes,
    Control Eng. Pract., 12 (2004) 357–373. 
-  J. Rodziewicz, A. Mielcarek, W. Janczukowicz, A. Białowiec,
    A. Gotkowska-Płachta, M. Proniewicz, Ammonia nitrogen
    transformations in a reactor with aggregate made of sewage
    sludge combustion fly ash, Water Environ. Res., 88 (2016)
      715–723.