1. Amatya, P.L., 1996. Anaerobic treatment of tapioca starch industry wastewater by bench scale upflow anaerobic sludge blanket (UASB) reactor. M. Eng. Thesis. AIT. Bangkok. Thailand.
2. Standard Methods for the Examination of Water & Wastewater;APHA (American Public Health Association),1995
3. Monitoring biofilter clogging: biochemical characteristics of the biomass;Bihan;Water Res.,2000
4. Bodkhe, S.Y., 2003. Concept and application of a novel anaerobic reactor system for decentralised sewage treatment. In: The Proceedings of 5th GVC-Abwasser Kongress, Bremen (FRG), during Sept. 22–24, 2003, Vol. 2, pp. 557–563.
5. Low temperature treatment of domestic sewage in upflow anaerobic sludge blanket and anaerobic hybrid reactors;Elmitwalli;Water Sci. Technol.,1999