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Kinetic modeling of carbon and nutrients removal in an integrated rotating biological contactor-activated sludge system

  • A. Akhbari
  • A. A. L. ZinatizadehEmail author
  • P. Mohammadi
  • Y. Mansouri
  • M. Irandoust
  • M. H. Isa
Original Paper

Abstract

In this study, kinetics of biological carbon, nitrogen, and phosphorous removal from a synthetic wastewater in an integrated rotating biological contactor-activated sludge system was investigated. The experimental data obtained from varying four significant independent factors viz., hydraulic retention time, chemical oxygen demand for nitrogen to phosphorus ratio, internal recirculation from aerobic to anoxic zone and disks rotating speed were used for the process kinetic modeling. In order to obtain the bioprocess kinetic coefficients, Monod, first-order and Stover–Kincannon models were employed. As a result, Monod and Stover–Kincannon models were found to be the appropriate models to describe the bioprocess in the rotating biological contactor-activated sludge system as the determination coefficient for the first-order model obtained less than 0.79. According to the Monod model, growth yield, microbial decay rate, maximum specific biomass growth rate, and half-velocity constant coefficients were found to be 0.712 g VSS/g COD, 0.008/d, 5.54/d and 55 mg COD/L, respectively. From Stover–Kincannon model, the maximum total substrate removal rate constant and half-velocity constant were determined as 15.2, 10.98, 12.05 g/L d and 14.78, 7.11, 6.97 mg/L for chemical oxygen demand, nitrogen and phosphorus removal, respectively. The kinetic parameters determined in this study can be used to improve the design and operation of the biological contactor-activated sludge system in full scale.

Keywords

Nutrient removal Monod model First order model Stover–Kincannon model 

List of symbols

RBC

Rotating biological contactor

AS

Activated sludge

TKN

Total Kjeldahl nitrogen, mg/L

MLSS

Mixed liquor suspended solids, mg/L

COD

Chemical oxygen demand, mg/L

TN

Total nitrogen, mg/L

VSS

Volatile suspended solid, mg/L

SRT

Solid retention time, d−1

OLR

Organic loading rate, g/L d

Y

Growth yield coefficient, g VSS/g COD

kd

Microbial decay rate, d−1

μmax

Maximum specific biomass growth rate, g VSS produced/g VSS present d

ks

Half-velocity constant, mg/m3

Umax

Maximum substrate utilization rate constant, g/L d

rsu

Rate of change in the substrate concentration due to utilization, g/m3 d

rg

Rate of change in the biomass concentration, g/m3 d

K

Maximum specific substrate utilization rate, g COD/g VSS prod. d

X

Biomass concentration, g/m3

S0

Influent substrate concentration, g/m3

S

Substrate concentration, g/m3

μ

Specific biomass growth rate, g VSS produced/g VSS present d

k1

First-order nitrogen removal rate constant, d−1

Q0

Influent flow rates, m3/d

Q

Effluent flow rates, m3/d

Qw

Waste sludge flow rates, m3/d

Xe

Effluent biomass concentration, mg/L

Xw

Effluent biomass concentration, mg/L

V

Volume of the reactor, m3

rsu/x

Specific substrate utilization rate, g COD/g VSS d

ds/dt

Substrate removal rate, g/L d

Notes

Acknowledgments

The support provided by Kermanshah Water and Wastewater Company is greatly appreciated. The authors acknowledge the access to laboratory equipment provided by the Water and Power Industry Institute for Applied and Scientific Higher Education (Mojtama-e-gharb), Kermanshah which has resulted in this paper. The authors also wish to thank Mrs S. Kiani for her assistance (Technical Assistant of Water and Wastewater Laboratory).

References

  1. Akhbari A, Zinatizadeh AA, Mohammadi P, Irandoust M, Mansouri Y (2011) Process modeling and analysis of biological nutrients removal in an integrated RBC-AS system using response surface methodology. J Chem Eng 168:269–279CrossRefGoogle Scholar
  2. APHA, WPCF, AWWA (1999) Standard methods for the examination of water and wastewater, 20th edn. American Public Health Association (APHA), Washington, DCGoogle Scholar
  3. Borja R, Rincón B, Raposo F, Alba J, Mart’ın A et al (2003) Kinetics of mesophilic anaerobic digestion of the two-phase olive mill solid waste. J Biochem Eng 15:139–145CrossRefGoogle Scholar
  4. Brdjanovic D (1998) Modeling of biological phosphorus removal in activated sludge systems, IHE Delft, TU Delft. Balkema Publishers, USA, p 251Google Scholar
  5. Büyükkamacı N, Filibeli A (2002) Determination of kinetic constants of an anaerobic hybrid reactor. Process Biochem 38:73–79CrossRefGoogle Scholar
  6. Debik E, Coskun T (2009) Use of the static granular bed reactor (SGBR) with anaerobic sludge to treat poultry slaughterhouse wastewater and kinetic modeling. Biores Technol 100:2777–2782CrossRefGoogle Scholar
  7. Di Palma L, Verdone N (2009) The effect of disk rotational speed on oxygen transfer in rotating biological contactors. Biores Technol 100:1467–1470CrossRefGoogle Scholar
  8. Isik M, Sponza T (2005) Substrate removal kinetics in an upflow anaerobic sludge blanket reactor decolorising simulated textile wastewater. Process Biochem 40:1189–1198CrossRefGoogle Scholar
  9. Jime’neza AM, Borjab R, Martı’nc A, Raposob F et al (2006) Kinetic analysis of the anaerobic digestion of untreated vinasses and vinasses previously treated with Penicillium decumbens. J Environ Manag 80:303–310CrossRefGoogle Scholar
  10. Jin RC, Zheng P (2009) Kinetics of nitrogen removal in high rate anammox upflow filter. J Hazard Mater 170:652–656CrossRefGoogle Scholar
  11. Kaewsuk J, Thorasampan W, Thanuttamavong M, Tae Seo G et al (2010) Kinetic development and evaluation of membrane sequencing batch reactor (MSBR) with mixed cultures photosynthetic bacteria for dairy wastewater treatment. J Environ Manag 91:1161–1168CrossRefGoogle Scholar
  12. Kapdan IK, Aslan S (2008) Application of the Stover–Kincannon kinetic model to nitrogen removal by Chlorella vulgaris in a continuously operated immobilized photobioreactor system. J Chem Technol Biotechnol 83:998–1005CrossRefGoogle Scholar
  13. Metcalf L, Eddy H (2003) Wastewater Engineering, 4th edn. McGraw-Hill, New YorkGoogle Scholar
  14. Monod J (1949) The growth of bacterial cultures. Ann Rev Microbiol 3:371–376CrossRefGoogle Scholar
  15. Pala A, Bölükba Ö (2005) Evaluation of kinetic parameters for biological CNP removal from a municipal wastewater through batch tests. Process Biochem 40:629–635CrossRefGoogle Scholar
  16. Pathwardan AW (2003) Rotating biological contactors: a review. Ind Eng Chem Res 42:2035–2051CrossRefGoogle Scholar
  17. Pavlostathis SG, Giraldo-Gomez E (1991) Kinetics of anaerobic treatment. Water Sci Technol 24(8):35–59Google Scholar
  18. Pearson F, Pavlostathis SG, Giraldo E, Shiun-Chung C, Gautier M (1980) Toxic inhibition of anaerobic biodegradation. J Water Pollut Control Fed 52:472–482Google Scholar
  19. Pirsaheb M, Mesdaghin AR, Shahtaheri SJ, Zinatizadeh AA (2009) Kinetic evaluation and process performance of a fixed film bioreactor removing phthalic acid and dimethyl phthalate. J Hazard Mat 167:500–506Google Scholar
  20. Santos VA, Tramper J, Wijffels RH, Gewely MR (1998) Integrated nitrogen removal in compact systems by immobilized microorganisms: new-generation bioreactors. Biotechnol Annu Rev 4:315–386Google Scholar
  21. Sponza DT, Uluko A (2008) Kinetic of carbonaceous substrate in an upflow anaerobic sludge sludge blanket (UASB) reactor treating 2,4 dichlorophenol (2,4 DCP). J Environ Manag 86:121–131CrossRefGoogle Scholar
  22. Stover EL, Kin Cannon DF (1982) Rotating biological contactor scale-up and design. In: Proceedings of the 1st International Conference on Fixed Film Biological Processes, Kings IslandGoogle Scholar
  23. Weng CN, Molof AH (1974) Nitrification in the biological fixed-film rotating disk system. J Water Pollut Control Fed 46:1675–1685Google Scholar
  24. Yu HQ, Wilson F, Tay JH (1998) Kinetic analysis of an anaerobic filter treating soybean wastewater. Water Res 32:3341Google Scholar

Copyright information

© CEERS, IAU 2012

Authors and Affiliations

  • A. Akhbari
    • 1
  • A. A. L. Zinatizadeh
    • 2
    Email author
  • P. Mohammadi
    • 3
  • Y. Mansouri
    • 4
  • M. Irandoust
    • 5
  • M. H. Isa
    • 6
  1. 1.Sama Technical and Vocational Training CollegeIslamic Azad University, Kermanshah BranchKermanshahIran
  2. 2.Water and Wastewater Research Center (WWRC), Department of Applied Chemistry, Faculty of ChemistryRazi UniversityKermanshahIran
  3. 3.Department of Environmental Health Engineering-Kermanshah, Health Research Center (KHRC)Kermanshah University of Medical ScienceKermanshahIran
  4. 4.Young Researchers Club, Ilam BranchIslamic Azad UniversityIlamIran
  5. 5.Department of Analytical Chemistry, Faculty of ChemistryRazi UniversityKermanshahIran
  6. 6.Department of Civil EngineeringUniversity Teknologi PetronasPerakMalaysia

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