Biocatalysed sulphate removal in a BES cathode

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orcId Coma Bech, Marta​ ​ scopusId Coma Bech, Marta​ ​
Coma Bech, Marta
orcId Puig Broch, Sebastià​ ​ scopusId Puig Broch, Sebastià​ ​
Puig Broch, Sebastià
orcId Pous Rodríguez, Narcís​ ​ scopusId Pous Rodríguez, Narcís​ ​
Pous Rodríguez, Narcís
orcId Balaguer i Condom, Maria Dolors​ ​ scopusId Balaguer i Condom, Maria Dolors​ ​
Balaguer i Condom, Maria Dolors
orcId Colprim Galceran, Jesús​ researcherId Colprim Galceran, Jesús​ scopusId Colprim Galceran, Jesús​ ​
Colprim Galceran, Jesús
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Sulphate reduction in a biological cathode and physically separated from biological organic matter oxidation has been studied in this paper. The bioelectrochemical system was operated as microbial fuel cell (for bioelectricity production) to microbial electrolysis cell (with applied voltage). Sulphate reduction was not observed without applied voltage and only resulted when the cathodic potential was poised at -0.26 V vs. SHE, with a minimum energy requirement of 0.7 V, while maximum removal occurred at 1.4 V applied. The reduction of sulphate led to sulphide production, which was entrapped in the ionic form thanks to the high biocathode pH (i.e. pH of 10) obtained during the process ​
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