Bioelectrochemical ammonium recovery from wastewater: A review

Maria del Mar, Baeza Labat, Juan Antonio Baeza Labat, Albert Guisasola, Mariella Belen Galeano, Mira Sulonen, Zainab Ul Kausar

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Resum

Due to the anticipated rise in demand for ammonia, the search for viable methods for its recovery has intensified in recent years, as traditional ammonia production is a high energy intensive process. Bioelectrochemical systems (BESs) offer an alternative solution for ammonia recovery since they have shown lower energy demand (in terms of kJ g− 1 N recovered) at lab-scale than other methodologies. In BESs, the bioelectrochemically generated current drives the transport of NH4 + from the wastewater to a concentration chamber through a cation exchange membrane before its subsequent recovery. This paper describes the fundamentals and opportunities for bioelectrochemical ammonia recovery (either by stripping, absorption, or precipitation) in different BES devices such as microbial fuel cells, microbial electrolysis cells, microbial desalination cells and bioelectroconcentration cells and compares the performance of all the reported experimental works so far. Moreover, the most critical challenges (low current density, nature and quantity of the carbon source, inlet ammonium concentration, use of membranes, energy yield and recovery efficiency) have been detailed and discussed in view of better understanding the current bottlenecks for its scale-up and, thus, for its prompt industrial adoption.
Idioma originalEnglish
Número d’article144855
Nombre de pàgines13
RevistaChemical Engineering Journal
Volum472
DOIs
Estat de la publicacióPublicada - 15 de set. 2023

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