TY - JOUR
T1 - Electroflotation enables treatment of effluents generated during pyrolytic biomass revalorization
AU - Nicolau dos Santos, Gláucia
AU - José Alves Felisardo, Raul
AU - Gomes Galrão, Diego
AU - Paulo Rosa Barbosa, Marcus
AU - Menezes Santos, Roberta
AU - Francisco da Silva, Gabriel
AU - dos Santos Freitas, Lisiane
AU - Maria Egues Dariva, Silvia
AU - Garcia-Segura, Sergi
AU - Bezerra Cavalcanti, Eliane
N1 - Funding Information:
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brazil (CAPES) - Finance Code 001, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Tiradentes University (UNIT)/ PROCAPS for the scholarship granted.
Publisher Copyright:
© 2021
PY - 2021/12/15
Y1 - 2021/12/15
N2 - Wastewater produced during biomass revalorization contains high organic load. Organic compounds generated during pyrolysis of biomass are hardly removed by conventional treatments. If sustainable treatment of these effluents can be enforced, biomass revalorization would be an excellent sustainable approach for energy production. This work explores the competitiveness of electroflotation as emerging electrochemically-driven separation technology using a scaled-up continuous-flow electroflotation reactor (CFER). Electrogeneration of gas bubbles drives the separation of hydrophobic organic compounds from aqueous solution. Experimental designed was employed to optimize the operational variables (i.e., applied current density and sodium chloride concentration) at different flow rates. Under conditions of 3.5 mA cm−2, 2.0 g L-1 of NaCl, and flowrate of 100 L h−1, complete decolorization of effluent was obtained with a total organic abatement of 55%. Chromatographic analyses demonstrated complete removal of phenolic compounds. These results identify electroflotation as suitable and promising pre-treatment to decrease the high-organic loads of pyrolytic wastewater.
AB - Wastewater produced during biomass revalorization contains high organic load. Organic compounds generated during pyrolysis of biomass are hardly removed by conventional treatments. If sustainable treatment of these effluents can be enforced, biomass revalorization would be an excellent sustainable approach for energy production. This work explores the competitiveness of electroflotation as emerging electrochemically-driven separation technology using a scaled-up continuous-flow electroflotation reactor (CFER). Electrogeneration of gas bubbles drives the separation of hydrophobic organic compounds from aqueous solution. Experimental designed was employed to optimize the operational variables (i.e., applied current density and sodium chloride concentration) at different flow rates. Under conditions of 3.5 mA cm−2, 2.0 g L-1 of NaCl, and flowrate of 100 L h−1, complete decolorization of effluent was obtained with a total organic abatement of 55%. Chromatographic analyses demonstrated complete removal of phenolic compounds. These results identify electroflotation as suitable and promising pre-treatment to decrease the high-organic loads of pyrolytic wastewater.
KW - Effluent
KW - Electrochemical Treatment
KW - Electroflotation
KW - Pyrolysis
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U2 - 10.1016/j.seppur.2021.119458
DO - 10.1016/j.seppur.2021.119458
M3 - Article
AN - SCOPUS:85113304807
SN - 1383-5866
VL - 277
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 119458
ER -