Volume 3 Number 2 K. Krongthamchat Environmental Health Science Department, Khon Kaen University, Khon Kaen, Thailand R. Riffat Civil and Environmental Engineering Department, George Washington University, Washington, DC, USA S. Dararat Environmental, Ecological and Energy Department, Thailand Institute of Scientific and Technological Research, Bangkok, Thailand Anaerobic Cobalt Digester sludge Halophilic methanogens Iron Nickel Baxter, R. M. and Gibbons, N. E., (1956); Effect of Sodium and Potassium Chloride on Certain Enzymes of Micrococcus Halodenitrificans and Pseudomonas Salinaria; Can. J. Microbiol.,; 2 (6), 599-606 (8 Pages) Hovious, J. C., (1973); Identification and Control of Petrochemical Pollutants Inhibitory to Anaerobic Processes; Environmental Protection Technology Series.,EPA-R2-73- 194, USEPA, Cincinnati, Ohio.,; Hulshoff-Pol, L. W., Van de Worp, J. J. M., Lettinga, G. and Beverloo, W. A., (1986); Physical Characterization of Anaerobic Granular Sludge. In: Anaerobic Treatment; A Grown-up Technology. Aquatech; Amsterdam.; , 89-101 (13 Pages) Krongthamchat, K., and Riffat, R., (2001); Organic, Biodegradation in Saline Wastewater Using Halophile-Supplemented Methanogenic Cultures; Proc. 9th World Congress Anaerobic Digestion: Anaerobic Conversion for Sustainability, Part 2, Antwerpen, Belgium.,; Macleod, R. A. and Onofrey, E., (1957); Nutrition and Metabolism of Marine Bacteria VI. Quantitative Requirements for Halides,Magnesium, Calcium, and Iron; Can. J. Microbiol.,; 3 (5), 753-759 (7 Pages) Mah, R. A., Smith, M. R. and Baresi, L., (1978); Studies on an Acetate-Fermenting Strain of Methanosarcina; Appl. Environ. Microbiol.,; 35 (6), 1174-1184 (11 Pages) Metcalf and Eddy., (2003); Wastewater Engineering: Treatment, Disposal and Reuse; 4th. Ed. McGraw Hill Inc., New York, USA.; Riffat, R. and Krongthamchat, K., (2006); Specific Methanogenic Activity (SMA) of Halophilic and Mixed Cultures in Saline Wastewater; Int. J. Environ. Sci. Tech.,; 2 (4), 291-299 (9 Pages) Speece, R. E., (1996); Anaerobic Biotechnology for Industrial Wastewaters; Archae Press., Nashville, TN, USA.; Speece, R. E., Parkin, G. F. and Gallagher, D., (1983); Nickel Stimulation of Anaerobic Digestion; Water Res.,; 17 (16), 677-683 (7 Pages) Takashima, M. and Speece, R. E., (1989); Mineral Requirements for High Rate Methane Fermentation of Acetate at Low SRT; J. Water. Pollut. Control. Fed.,; 61 (11-12), 1645-1650 (6 Pages)