Mathematical model for a batch aerated submerged biofilm reactor for organic carbon and nitrogen removal |
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Authors: | Yongik Choi Donald Hayes Kraig Johnson |
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Affiliation: | (1) Department of Environmental Engineering at Silla University, San 1-1, Gwaebop-dong, Sasang-gu, Busan, 617-736, Korea;(2) Department of Civil and Environmental Engineering at University of Utah, 84112 Salt Lake City, USA |
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Abstract: | An aerated submerged biofilm (ASBF) pilot plant has been developed. The present study optimized an inexpensive method of enhanced
wastewater treatment. Over a period of three and one half months, a total of 11 batch runs were performed. By the fourth run,
the biofilm had matured to the point that it consumed all the ammonia in 40 hours. The investigation aimed to present mathematical
models for describing the dynamic behaviors of the dissolved organic matter removal and nitrification in the Aerated Submerged
Biofilm (ASBF) for a batch reactor. Based on the experimental data from the batch system of the ASBF pilot plant, mathematical
models were developed to predict dissloved organic matter and ammonia nitrogen removal rates as a function of heterotrophic
and autotrophic bacteria populations, dissolved organic matter concentrations, ammonia nitrogen concentrations, dissolved
oxygen concentrations, and temperature. The mathematical models for dissolved organic matter and ammonia nitrogen removal
in ASBF include two differential equations reflecting heterotrophic and autotrophic bacteria populations, and a number of
kinetic parameters. Consequently, the results provide a better insight into the dynamic behaviors of heterotrophic and autotrophic
biofilm growth and their practical application to wastewater for dissolved organic matter and ammonia nitrogen removal process. |
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Keywords: | Autotrophic Bacteria Dissolved Oxygen Heterotrophic Bacteria Kinetic Parameters Mathematical Model |
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