Journal of Industrial and Engineering Chemistry, Vol.31, 257-262, November, 2015
Influence of carbon/nitrogen ratio and non-aerated zone size on performance and energy efficiency of a partially-aerated submerged fixed-film bioreactor
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Performance and energy efficiency of an upflow partially aerated submerged fixed-film (UP/ASFF) bioreactor was evaluated during a 10-month operation period. Increasing loading rates at constant HRT and COD/N increased nitrogen removals. Increase of non-aerated zone could also improve the nitrogen removals up to 83%. Energy performance coefficient based on required electrical energy showed that the energy efficiency of the system increases at lower COD/N value and bigger non-aerated zone for simultaneous COD and nitrogen removal from the synthetic wastewater. The present study showed also similar performance for municipal wastewater, demonstrating the potential of UP/ASFF system to treat high-ammonium municipal wastewaters.
Keywords:Partially-aerated submerged fixed-film;bioreactor;Non-aerated zone size;COD removal;Nitrogen removal;Energy performance coefficient
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