TY - JOUR
T1 - Biotransformation and biodegradation of N-substituted aromatics in methanogenic granular sludge
AU - Razo-Flores, Elías
AU - Donlon, Brian
AU - Lettinga, Gatze
AU - Field, Jim A.
N1 - Funding Information:
This research was supported by the Consejo Nacional de Ciencia y Tecnologı́a from México. Support from the Human Capital and Mobility Program of the EC is also appreciated (B.D.).
PY - 1997/7
Y1 - 1997/7
N2 - N-Substituted aromatic compounds are environmental contaminants associated with the production and use of dyes, explosives, pesticides and pharmaceuticals. In this article, we examine the potential of anaerobic granular sludge from anaerobic treatment systems towards the detoxification, transformation, and mineralization of nitroaromatic and azo compounds, Nitroaromatics and azo dyes with strong electron withdrawing are highly inhibitory to acetoclastic methanogenic bacteria. However, nitro and azo substituted aromatics are readily reductively detoxified in methanogenic consortia to their respective aromatic amines, which are several orders of magnitude less toxic. This reductive detoxification has allowed the successful operation of anaerobic reactors for the treatment of highly toxic aromatic compounds. In the course of the experiments it was discovered that some aromatic airlines were mineralized. These results indicate that some N- substituted aromatic compounds can be completely mineralized and serve as a carbon and energy source for anaerobic bacteria.
AB - N-Substituted aromatic compounds are environmental contaminants associated with the production and use of dyes, explosives, pesticides and pharmaceuticals. In this article, we examine the potential of anaerobic granular sludge from anaerobic treatment systems towards the detoxification, transformation, and mineralization of nitroaromatic and azo compounds, Nitroaromatics and azo dyes with strong electron withdrawing are highly inhibitory to acetoclastic methanogenic bacteria. However, nitro and azo substituted aromatics are readily reductively detoxified in methanogenic consortia to their respective aromatic amines, which are several orders of magnitude less toxic. This reductive detoxification has allowed the successful operation of anaerobic reactors for the treatment of highly toxic aromatic compounds. In the course of the experiments it was discovered that some aromatic airlines were mineralized. These results indicate that some N- substituted aromatic compounds can be completely mineralized and serve as a carbon and energy source for anaerobic bacteria.
KW - Anaerobic biodegradation
KW - Anaerobic biotransforrnation
KW - Anaerobic granular sludge
KW - Aromatic amine
KW - Azo dye
KW - Nitroaromatic
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U2 - 10.1016/S0168-6445(97)00031-4
DO - 10.1016/S0168-6445(97)00031-4
M3 - Article
C2 - 9340000
AN - SCOPUS:0030771764
VL - 20
SP - 525
EP - 538
JO - FEMS Microbiology Reviews
JF - FEMS Microbiology Reviews
SN - 0168-6445
IS - 3-4
ER -