TY - JOUR
T1 - enhanced removal of methyl tert-butyl ether by a bacterial consortium supplemented with yeast extract
AU - Guerrero-Barajas, C.
AU - Alanís-Sanchez, B. M.
AU - Flores-Ortíz, C. M.
AU - Cruz-Maya, J. A.
AU - Jan-Roblero, J.
N1 - Publisher Copyright:
© 2019 Revista Mexicana de Ingeniera Quimica. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Methyl tert-butyl ether (MTBE) is highly soluble in water and considered a contaminant. Although MTBE can be removed by microbial consortia its removal efficiency is low due to its toxic effect on microbial growth. An alternative to enhance the MTBE degradation efficiency is by cometabolism. Yeast extract (cometabolite) was studied in the EB-MTBE-24 consortium to enhance the MTBE degradation efficiency in cultures at 105 mg L-1 of MTBE and in cultures at 105 mg L-1 of MTBE supplemented with 100 and 500 mg L-1 of yeast extract (100YE and 500YE, respectively). The 100YE culture presented higher values of μmax = 0:07 ± 0:02 h-1, degradation efficiency of 77.63 ± 1.16% and a global degradation rate 0.90 ± 0.05 h-1 than the culture without YE addition. The 500YE culture presented the lowest MTBE degradation efficiency. The kinetics of MTBE degradation for the 100YE culture is described by first-order and pseudo-first-order reaction models. The cultivable fraction of the EB-MTBE- 24 consortium is constituted by Sphingobium barthaii C1, Gordonia polyisoprenivorans C2, and Ochrobactrum anthropi C3. The 100YE culture of the EB-MTBE-24 consortium possess a greater potential to degrade high MTBE concentrations at a high rate suggesting that the YE minimizes the MTBE inhibitory effect on microbial growth. Keywords: MTBE removal, bacterial consortium, cometabolism.
AB - Methyl tert-butyl ether (MTBE) is highly soluble in water and considered a contaminant. Although MTBE can be removed by microbial consortia its removal efficiency is low due to its toxic effect on microbial growth. An alternative to enhance the MTBE degradation efficiency is by cometabolism. Yeast extract (cometabolite) was studied in the EB-MTBE-24 consortium to enhance the MTBE degradation efficiency in cultures at 105 mg L-1 of MTBE and in cultures at 105 mg L-1 of MTBE supplemented with 100 and 500 mg L-1 of yeast extract (100YE and 500YE, respectively). The 100YE culture presented higher values of μmax = 0:07 ± 0:02 h-1, degradation efficiency of 77.63 ± 1.16% and a global degradation rate 0.90 ± 0.05 h-1 than the culture without YE addition. The 500YE culture presented the lowest MTBE degradation efficiency. The kinetics of MTBE degradation for the 100YE culture is described by first-order and pseudo-first-order reaction models. The cultivable fraction of the EB-MTBE- 24 consortium is constituted by Sphingobium barthaii C1, Gordonia polyisoprenivorans C2, and Ochrobactrum anthropi C3. The 100YE culture of the EB-MTBE-24 consortium possess a greater potential to degrade high MTBE concentrations at a high rate suggesting that the YE minimizes the MTBE inhibitory effect on microbial growth. Keywords: MTBE removal, bacterial consortium, cometabolism.
KW - Bacterial Consortium
KW - Cometabolism
KW - MTBE Removal
UR - http://www.scopus.com/inward/record.url?scp=85070466582&partnerID=8YFLogxK
U2 - 10.24275/uam/izt/dcbi/revmexingquim/2019v18n2/Guerrero
DO - 10.24275/uam/izt/dcbi/revmexingquim/2019v18n2/Guerrero
M3 - Artículo
AN - SCOPUS:85070466582
SN - 1665-2738
VL - 18
SP - 589
EP - 604
JO - Revista Mexicana de Ingeniera Quimica
JF - Revista Mexicana de Ingeniera Quimica
IS - 2
ER -