Journal article

Optimising nitrogen recovery from reject water in a 3-chamber bioelectroconcentration cell

V Koskue, JM Rinta-Kanto, S Freguia, P Ledezma, M Kokko

Separation and Purification Technology | Published : 2021

Abstract

With the growing demand for macronutrients, such as nitrogen, and environmental issues related to their production, there is increasing need for efficient nutrient recycling. Reject waters from the dewatering of anaerobically digested sewage sludge are potential sources for nutrient recovery due to their high ammonium nitrogen (NH -N) concentration (ca. 1 g L ) and low volume (ca. 1% of incoming sewage). In this study, a 3-chamber bioelectroconcentration cell was used for NH -N recovery into a liquid concentrate from both synthetic and real reject water. NH -N recovery efficiency and rate were optimised based on NH -N loading rate, varying from 1.4 to 9.4 g L d with synthetic reject wate..

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