Bioelectrochemical Denitrification for the Treatment of Saltwater Recirculating Aquaculture Streams

ACS Omega
Elisa Marx SanderS Freguia

Abstract

Maintaining low concentrations of nitrogen compounds (ammonium, nitrate and nitrite) in recirculating aquaculture waters is extremely important for a larger and healthier fish production, as well as for water discharge purposes. Although ammonium removal from aquaculture streams is usually done within a nitrifying step, nitrate removal via denitrification is still partially limited by the low organic matter availability. Therefore, an easy-to-operate autotrophic denitrifying bioelectrochemical system is herein proposed for the treatment of seawater aquaculture streams. The nitrate-containing synthetic stream flows sequentially through a biological denitrifying cathode (placed at the lower portion of a tubular reactor) and an abiotic anode (generating electrons and oxygen from water splitting, at the upper portion). Experimental results with synthetic seawater showed that the system reached denitrification rates of 0.13 ± 0.01 kg N m-3 day-1, operating with minimum ammonium and nitrite accumulation, as well as minimum chlorine formation in the abiotic anode, despite the high chloride concentration. There results support the technical potential for simultaneous bioelectrochemical denitrification and partial re-oxygenation of aqua...Continue Reading

References

Jun 2, 2007·Environmental Science & Technology·Peter ClauwaertWilly Verstraete
May 10, 2008·Water Research·Bernardino VirdisJürg Keller
Jun 14, 2008·Biotechnology and Bioengineering·César I TorresBruce E Rittmann
Dec 9, 2008·Water Research·Stephan TaitDamien J Batstone
Aug 14, 2009·Environmental Science & Technology·Bernardino VirdisJürg Keller
Jan 20, 2012·Environmental Science & Technology·Sebastià PuigM Dolors Balaguer
Jul 26, 2012·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Damien J BatstoneEveline Volcke
Jul 5, 2013·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Jin-Tao LiYu-Mei Hua
Feb 24, 2015·Journal of Hazardous Materials·Anna Vilajeliu-PonsJesús Colprim

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Citations

Dec 2, 2020·Bioresource Technology·Narcís PousSebastià Puig
Feb 18, 2021·Environmental Science and Pollution Research International·Jilong RenRui Han

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Methods Mentioned

BETA
amplicon sequencing

Software Mentioned

Minteq MINTEQ
Minteq

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