Exergy analysis of a laboratory-scale upflow anaerobic sludge blanket reactor with sulfate-reducing microorganisms to precipitate heavy metal ions (Cu, Fe, Zn, and Pb) using Aspen Plus (R)
Por:
Jose Leal-Gutierrez, Manuel, Bernal-Gonzalez, Marisela, del Carmen Duran-Dominguez-de-Bazua, Maria, Enrique Chavez-Castellanos, Angel, Rodolfo Bazua-Rueda, Enrique
Publicada:
1 mar 2022
Ahead of Print:
1 nov 2021
Categoría:
Chemical engineering (miscellaneous)
Resumen:
Bioreactors with sulfate-reducing microorganisms (SRM) are an option to
treat wastewater from the flotation operation of a mine containing
dissolved sulfate and metal ions. SRM degrade organic carbonaceous
substrates to obtain energy using sulfate ions as terminal electron
acceptor and generating hydrogen sulfide to precipitate metals as
sulfides. Exergy is a property to aid in the thermodynamic analysis of
processes. This study aims to develop an exergy analysis of a
laboratory-scale UASB reactor with SRM precipitating heavy metal ions
using an electrolyte model in Aspen Plus (R) process simulation software
fitted to experimental data. A simulation model of the biotransformation
of sulfates to sulfides and the precipitation of metals was developed
using Aspen Plus (R). The UASB reactor was split into ten stages to
observe the behavior of the compounds and their distribution throughout
the reactor. The thermodynamic model selected was the Unsymmetric NRTL
electrolyte activity coefficient model proposed by Chen and Evans, model
ENRTL-RK in Aspen. Biochemical reactions were simulated using
stoichiometric reactors with a double Monod kinetic model. The Aspen
Plus (R) electrolyte model demonstrated that simulating the behavior of
ionic species present in the streams of the laboratory scale UASB
reactor is feasible. Comparison of calculated values of the Aspen Plus
(R) simulation model and the laboratory scale UASB reactor experimental
data showed internal consistency and the Aspen Plus (R) simulation model
could represent them. Exergy analysis with thermodynamic procedures
calculated aqueous ionic solutions exergies. The results of the exergy
analysis demonstrated that they could provide insight for understanding
the performance of a biochemical reactor and its implications in
quantifying its environmental benefits. The second law efficiency
provides means for further optimization of the process.
Filiaciones:
Jose Leal-Gutierrez, Manuel:
Univ Nacl Autonoma Mexico, Labs Ingn Quim Ambiental & Quim Ambiental, Dept Ingn Quim, Fac Quim, Conjunto E Circuito Invest Cient S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
Bernal-Gonzalez, Marisela:
Univ Nacl Autonoma Mexico, Labs Ingn Quim Ambiental & Quim Ambiental, Dept Ingn Quim, Fac Quim, Conjunto E Circuito Invest Cient S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
del Carmen Duran-Dominguez-de-Bazua, Maria:
Univ Nacl Autonoma Mexico, Labs Ingn Quim Ambiental & Quim Ambiental, Dept Ingn Quim, Fac Quim, Conjunto E Circuito Invest Cient S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
Enrique Chavez-Castellanos, Angel:
Univ Nacl Autonoma Mexico, Labs Ingn Quim Ambiental & Quim Ambiental, Dept Ingn Quim, Fac Quim, Conjunto E Circuito Invest Cient S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
Rodolfo Bazua-Rueda, Enrique:
Univ Nacl Autonoma Mexico, Labs Ingn Quim Ambiental & Quim Ambiental, Dept Ingn Quim, Fac Quim, Conjunto E Circuito Invest Cient S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
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