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Chemical and Biochemical Engineering Quarterly, Vol. 31 No. 2, 2017.

Original scientific paper

https://doi.org/10.15255/CABEQ.2016.1026

Biological Nutrient Removal in an Intermittently Aerated Bioreactor

J. Derco orcid id orcid.org/0000-0002-8967-5965 ; Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
B. Urminská ; Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
A. Kovács ; Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
K. Šimkovič orcid id orcid.org/0000-0002-4238-5549 ; Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia

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Abstract

The extension of biological processes from carbonaceous impurities removal to nitrogen and phosphorus removal had an impact on the biological system configuration. The system must be well designed, optimized, and operated at its optimum in order to meet the ever more stringent effluent standards. An intermittently aerated completely mixed lab-scale activated sludge bioreactor (IACMB) has been used for modelling biological processes of nutrients removal. Concerning the nitrogen removal, the operating cycles 15–30 (15 minutes of aeration, 30 minutes of only mixing without aeration) and
30–30 were tested. For the experiments with luxury uptake processes, the operating cycles 15–45, 15–90, 30–60 and 15–75 were used. The cycle 15–75 was the most satisfactory with convenient lengths of aerobic, anoxic, and anaerobic period, high efficiency of
the nitrification and denitrification processes, and significant decrease in phosphorus concentration. The results have shown that the intermittently aerated bioreactors are suitable for nitrogen removal as well as luxury uptake of phosphorus. The main advantage is high flexibility in maintenance and control of biochemical environments in the bioreactor.







This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

denitrification; intermittently aerated completely mixed activated sludge bioreactor; luxury uptake; phosphorus; nutrient removal

Hrčak ID:

183957

URI

https://hrcak.srce.hr/183957

Publication date:

7.7.2017.

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