1. APHA, AWWA and WPCF, Standard methods for the examination of water and wastewater. 19th. Ed. Washington DC, 1995
2. Dinsdale, R. M., F. R. Hawkes, D. L. Hawkes, Comparison of mesophilic and themophilic upflow anaerobic sludge blanket reactors treating instant coffee production wastewater. Wat. Res., 31: 163–169, 1997
3. De Man, A. W. A, Anaerobic purification of raw sewage with the aid of granular sludge in UASB reactors. Report Agricultural University of Wageningen, Department of Water Pollution Control, 1990
4. Haskoning and Euroconsult, Monitoring report of the 5 MLD UASB treatment plant at Kanpur-Technical Report, 1990
5. Tchobanoglous, G., Burton, F. L., Wastewater engineering: Treatment, disposal and reuse. 3rd. Ed., New York, McGraw Hill, 394–426, 1991