Microbiology and biochemistry of anaerobic treatment.


Montañez Hernandez Lilia Ernestina1, García Lozano Marleny1, Peña Garcia Yadira1, Oropeza Navarro Ricardo2 & Balagurusamy Nagamani1*

1Laboratorio de Biorremediación, Escuela de Ciencias Biológicas, Universidad Autónoma de Coahuila, Carretera Torreón-Matamoros km.7.5, Torreón, Coah., México. 27000

2Instituto de Biotecnología /UNAM, Av. Universidad #2001, Col. Chamilpa, Cuernavaca, Mor., México. C.P. 62210


This chapter deals with biotransformation of nitrogen; sulfur compounds and methanogenesis during anaerobic treatment process. Under anaerobic conditions, nitrate, sulfate and carbonate are the major alternative acceptors of electrons to molecular oxygen for harnessing the energy by way of oxidation of organic compounds present in wastewater. Their availability and interactions affect the nature and efficiency of the treatment process, by way of either denitrification, dissimilatory nitrate reduction to ammonium, anammox, sulfate reduction or methanogenesis. Diversity of microorganisms involved and the biochemical mechanisms for each of the mentioned process are described. In addition, the importance of redox potential and the interactions involved among these different microbial groups is explained schematically.

In: Current Developments in Biotechnology & Bioengineering Volume IVA: Biological Treatment of Industrial Effluents. (Eds.) D.J. Lee, J. Jegatheesan, H.H. Ngo, P.C. Hallenbeck & A. Pandey. Elsevier, Amsterdam, Netherlands. pp.231-259. (ISBN: 978-0-444-63665-2).