Development of model simulation based on BioWin and dynamic analyses on advanced nitrate nitrogen removal in deep bed denitrification filter
A pilot-scale deep bed denitrification filter using quartz sand as the filter media was operated under filtration velocity of 5.23 m/h. Nitrate, nitrite, ammonia, and total nitrogen removal rates were relatively high at influent C/N ratios of 4:1 and 5:1. A model was developed using software to simulate the processes operating in the filter and improve the related parameters in the actual operations. The normalized sensitivity coefficient and the mean square sensitivity measure were used for the sensitivity analysis. Results showed that the stoichiometric parameters were the most sensitive, which were related to methylotrophs and biofilm. Measured data were consistent with the simulations. Moreover, the order of significance of factors affecting nitrate nitrogen removal was as follows: influent chemical oxygen demand, influent nitrate nitrogen, and hydraulic retention time. Last, the denitrification dynamic model was obtained at influent C/N ratio of 5:1.
KeywordsDeep bed denitrification filter Advanced nitrate removal Influent C/N ratio Model simulation.
The study was supported by the Major Science and Technology Program for Water Pollution Control and Treatment [2012ZX07103-004] and the Science and Technology Project of Guizhou Province [No. Qiankehezhicheng (2017) 2859]. We also thank Dr. Xinying Chen from China Agricultural University for his help of BioWin software.
- 1.Takahashi Y, Mao-An DU, Wang YB, Nakamura M (2005) Effect of AGP value of effluent from wastewater treatment plant on quality of receiving waters. China Water Wastewater 21(1):98–100Google Scholar
- 14.Suthersan S, Ganczarczyk JJ (1986) Inhibition of nitrite oxidation during nitrification. Some observations. Water Pollut Res J Can 21(2):257–266Google Scholar
- 21.Walter WG (1998) Standard methods for the examination of water and wastewater. Am Public Health Assoc 17(9):2002–2016Google Scholar
- 22.Voets JP, Vanstaen H, Verstraete W (1975) Removal of nitrogen from highly nitrogenous wastewaters. Journal 47(2):394–398Google Scholar
- 28.Lidong S, Anhui H, Rencun J, Dongqing C, Ping Z, Xiangyang X, Baolan H (2012) Enrichment of anammox bacteria from three sludge sources for the startup of monosodium glutamate industrial wastewater treatment system. J Hazard Mater 199–200(2):193–199Google Scholar
- 30.Sun Yingxue HY, Sun Y (2012) Denitrification biological filter as tertiary treatment for nitrogen removal. Chin J Environ Eng 6(6):1857–1862Google Scholar
- 35.Xu Y, Qiu T, Han M, Li J, Wang X (2013) Optimization of solid-phase denitrification process using response surface methodology. Chin J Environ Eng 7(2):489–493Google Scholar