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A review on the advances of nitrifying biofilm reactors and their removal rates in wastewater treatment.

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Chaali, Mona; Naghdi, Mitra; Brar, Satinder Kaur; Avalos-Ramírez, Antonio (2018). A review on the advances of nitrifying biofilm reactors and their removal rates in wastewater treatment. Journal of Chemical Technology & Biotechnology , vol. 93 , nº 11. p. 3113-3124. DOI: 10.1002/jctb.5692.

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Résumé

wastewaters and these reactors are resistant against toxic environment. Bioreactors, such as sequencing batch biofilm, moving bed biofilm, and etc. are advanced techniques to treat various types of wastewaters with diverse operating conditions. Ammonium oxidizing bacteria (AOB), nitrite oxidizing bacteria (NOB) and Anammox (anaerobic ammonium oxidation) bacteria are reported to be responsible for nutrient removal. In recent decades, the performance of these systems is widely studied and compared for a number of wastewater treatment applications. In general, they are particularly suitable, for high‐rate nitrification and nitrogen removal. The efficiency of these reactors has been confirmed in the laboratory and large‐scale plants. Their efficiency depends on surface area of the biocarrier, the filling percent volume of biofilm carriers, organic loading and diffused aeration supply. 50% to 98% removal in chemical oxygen demand removal was reported for <12 h of hydraulic retention time, 0.2 mg/L to 6.5 mg/L dissolved oxygen concentration and temperature range of 15‐35 °C. Also, the ratio of nitrate to ammonium conversion was from 0.2 to 90 and N₂ conversion was from 0 mg to 8.5 mg. This review studied each of these bioreactors in the removal of nutrients (N, P, and O) from different wastewaters and compared them to conventional treatment. The review also includes the relevant studies on laboratory and pilot scales bioreactors to enhance their performance and reduce their costs.

Type de document: Article
Mots-clés libres: high ammonia wastewater; biological reactor; nitrification; denitrification; support media
Centre: Centre Eau Terre Environnement
Date de dépôt: 27 août 2018 20:37
Dernière modification: 10 mai 2019 04:00
URI: http://espace.inrs.ca/id/eprint/7279

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