1. APHA (1992) Standard Methods for the Examination of Water and Wastewater (18th ed.). Port City Press, Baltimore
2. Danesh S. and Oleszkiewicz J. A. (1995) VFA production vs. VFA uptake in BNR-systems: The case for process separation. Proc. 68th Annu. Conference Water Environ. Federation, Vol. 1, pp. 723–732. Miami Beach, Florida
3. Dean J. A. (1987) Handbook of Organic Chemistry. McGraw-Hill
4. Elefsiniotis P. (1993) The effect of operational and environmental parameters on the acid-phase anaerobic digestion of primary sludge. Ph.D. thesis, The University of British Columbia, Vancouver, Canada
5. Primary fermentation of soluble and particulate organic matter for wastewater treatment;GonÇalves;Wat. Sci. Tech.,1994