1- Ramakrishnan, A., and Gupta, S.K. (2006). “Anaerobic biogranulation in a hybrid reactor treating phenolic waste.”
J. of Hazardous Materials,
137, 1488-1495.
2- Zhou, W., Imai, T., Ukita, M., Sekine, M., and Higuchi, T. (2005). “Triggering forces for anaerobic granulation in UASB reactors. ” Process Biochemistry, 41, 36-43.
3- Jeong, H.S., Kim, Y.H., Yeom, S.H., Song, B.K., and Lee, S.I. (2004). “Facilitated UASB granule formation using organic–inorganic hybrid polymers. ” Process Biochemistry, 40, 89-94.
4- Li, J., Hu, B., Pingm, Z., Qaisar, M., and Mei, L. (2007). “Filamentous granular sludge bulking in a laboratory scale UASB reactor.” Bioresource Technology, 99, 3431-3438.
5- Shayegan, J., Yousefnejad, M. S., and Hemmati, A. (2010). “A survey of sludge granulation theories under anaerobic conditions.” J. of Water and Wastewater, 76, 44-55. (In Persian)
6- Bhunia, P., and Ghangrekar, M.M. (2007). “Required minimum granule size in UASB reactor and characteristics variation with size.” Bioresource Technology, 98, 994- 999.
7- Mehdizadeh, H., and Shayegan, J. (2003). “The effect of sulfate concentration on COD removal and sludge granulation in UASB reactors.” J. Iran Chem. Eng., 16(1),1-9.
8- Yu, H.Q., Tay, J.H., and Fang, H.H.P. (1999). “Effects of added powdered and granular activated carbons on start-up performance of UASB reactors.” Environ. Technol., 20, 1095-1101.
9- Yan, Y. G., and Tay, J. H. (1997). “Characterization of the granulation process during UASB start-up.” Water Research, 31(1), 1573 - 1580.
10- Ghangrekar, M. M., Asolekar, S.R., and Joshi, S.G. (2005).“Characteristics of sludge developed under different loading conditions during UASB reactor start-up and granulation.” Water Research, 39(6), 1123-1133.
11- Holshaff, L. W. (1983). “Granulation in UASB Reactors.” Water Res. Tech., 15, 291-304.
12- Sharma, J., and Singh, R. (2001). “Effect of nutrients supplementation on anaerobic sludge development and activity for treating distillery effluent.” Bioresource Technology, 79, 203-206.
13- Yu, H.Q., Fang, H.H.P., and Tay, J.H. (2001). “Enhanced Sludge granulation in upflow anaerobic sludge blanket (UASB) reactor by aluminum chloride.” Chemosphere, 44, 31-36.
14- Yu, H.Q., Tay, J.H., and Fang, H.H.P. (2001). “The roles of calcium in sludge granulation during UASB reactor start-up.” Water Research, 35 (4), 1052- 1060.
15- Taheri Shahraini, H. (2000). “Stability of thermophilic up- flow anaerobic sludge blanket (UASB) reactor with temperature shocks.” J. of Water and Wastewater, 35, 2-8. (In Persian)