Anaerobic Biodegradation of Monoaromatic Compounds
by Mostafa Elshahed (9783639082647)

Anaerobic Biodegradation of Monoaromatic Compounds
 

Mostafa Elshahed


Release Date: 01 September 2008
Format: Paperback
Pages: 180
Category: Microbiology
Publisher: VDM Verlag
ISBN: 9783639082647
ISBN-10: 3639082648



Toluic acids degradation was studied under methanogenic and sulfate-reducing conditions. All toluic acid isomers were degraded under sulfate-reducing conditions, with m-toluate degradation occurring at the fastest rate. Benzoate, isophthalate, and m-carboxybenzylsuccinate were detected in m-toluate-degrading enrichments, suggesting a fumarate addition mechanism for m-toluate degraation. The metabolism of benzoate by Syntrophus aciditrophicus in coculture with hydrogen-using microorganisms was studied. Cyclohexane carboxylate, cyclohex-1-ene carboxylate, pimelate, and glutarate transiently accumulated during growth with benzoate. S. aciditrophicus also metabolized benzoate in pure culture in the absence of hydrogen-utilizing partners or terminal-electron acceptors. A novel protocol was developed to determine whether the degradation of toluene under sulfate-reducing conditions depends on interspecies hydrogen transfer. Although the outcome of the experiments failed to support the tested hypothesis, the protocol will be useful to determine the role of interspecies hydrogen transfer in the degradation of different compounds in environmental samples.

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