Characteristics of Critical Solid-Liquid Separation and Its Effect on the Performance of an Anaerobic Sequencing Batch Reactor Treating Municipal Sludge

Hur JM; Chang D; Chung TH

Korean Journal of Chemical Engineering, Vol.15, No.6, 596-602, November, 1998

Hur JM, Chang D, Chung TH

Solid-liquid separation and its type greatly affected the stability and performance of an anaerobic sequencing batch reactor (ASBR) for municipal sludge digestion. Flotation thickening occurred in the mesophilic ASBR, while solid-liquid separation in the thermophilic ASBR followed gravity thickening. Hydraulic retention times (HRT) and cycle period as well as type of thickening were key parameters governing sludge thickenability and critical solids accumulation. Thickened sludge bed volume was a critical operating variable in the ASBR with gravity thickening, which had poor performance because of the loss of thickened solids, and sludge interface disruption or instability of sludge bed due to internal gas evolution. A cyclic mutual effect between thickened volume and gas production was serious in gravity thickening, whereas it was insignificant in flotation thickening.

Keywords:Anaerobic Sequencing Batch Reactor;Municipal Sludge;Sludge Flotation. Solid-Liquid Separation;Thickenability

[References]

American Public Health Association, American Water Works Association, Water Environment Federation, "Standard Methods for the Examination of Water and Wastewater," Greenberg, A.E. Clesceri, L.S. and Eaton, A.D., eds., 18th Edition, APHa, Washing, D.C. (1992)
Benefield LD, Randall CW, "Biological Process Design for Wastewater Treatment," Prentice-Hall, Inc., Englewood Cliffs, New Jersey, U.S.A. (1980)
Chang D, Chung TH, "Development of a Novel Highrate Anaerobic Process using Sequencing Batch Reactors," Final Report to the Korea Research Foundation, Konkuk University, Seoul (1995)
Chung TH, Chang D, "Start-up of Thermophilic Digestion," Proc. 3rd WPCF/JSWA Joint Tech. Semi. Sewage Treat. Tech., Jap. Sewage Works Asso., Tokyo, 345 (1988)
Dague RR, Pidaparti SR, "Anaerobic Sequencing Batch Reactor Treatment of Swine Wastes," Proc. 46th Ind. Waste Conf., Purdue University, West Lafayette, Indiana, 751 (1992)
Earley JP, Ketchum LH, "Anaerobic Sequencing Batch Reactor Treatment of Coal Conversion Wastewater," In: Anaerobic Treatment of Industrial Wastewaters, Torpy, M.F., eds., Noyes Data Corp., New Jersey, 90 (1988)
Han JW, Chang D, Kim SS, J. Korea Soc. Water Waste, 8(1), 1 (1994)
Kennedy KJ, Sanchez WA, Hamoda MF, Droste RL, J. water Pollut. Control Fed., 63(1), 75 (1991)
Sung S, Dague RR, "Laboratory Studies and Modeling of the Anaerobic Sequencing Batch Reactor Processes," Proc. 65th Annual Water Environ. Fed. Conf., New Orleans, Lousiana, 1, 171 (1992)
Yim SS, Kwon YD, Korean J. Chem. Eng., 14(5), 354 (1997)

[Referenced By]

[1] American Public Health Association, American Water Works Association, Water Environment Federation, "Standard Methods for the Examination of Water and Wastewater," Greenberg, A.E. Clesceri, L.S. and Eaton, A.D., eds., 18th Edition, APHa, Washing, D.C. (1992)

[2] Benefield LD, Randall CW, "Biological Process Design for Wastewater Treatment," Prentice-Hall, Inc., Englewood Cliffs, New Jersey, U.S.A. (1980)

[3] Chang D, Chung TH, "Development of a Novel Highrate Anaerobic Process using Sequencing Batch Reactors," Final Report to the Korea Research Foundation, Konkuk University, Seoul (1995)

[4] Chung TH, Chang D, "Start-up of Thermophilic Digestion," Proc. 3rd WPCF/JSWA Joint Tech. Semi. Sewage Treat. Tech., Jap. Sewage Works Asso., Tokyo, 345 (1988)

[5] Dague RR, Pidaparti SR, "Anaerobic Sequencing Batch Reactor Treatment of Swine Wastes," Proc. 46th Ind. Waste Conf., Purdue University, West Lafayette, Indiana, 751 (1992)

[6] Earley JP, Ketchum LH, "Anaerobic Sequencing Batch Reactor Treatment of Coal Conversion Wastewater," In: Anaerobic Treatment of Industrial Wastewaters, Torpy, M.F., eds., Noyes Data Corp., New Jersey, 90 (1988)

[7] Han JW, Chang D, Kim SS, J. Korea Soc. Water Waste, 8(1), 1 (1994)

[8] Kennedy KJ, Sanchez WA, Hamoda MF, Droste RL, J. water Pollut. Control Fed., 63(1), 75 (1991)

[9] Sung S, Dague RR, "Laboratory Studies and Modeling of the Anaerobic Sequencing Batch Reactor Processes," Proc. 65th Annual Water Environ. Fed. Conf., New Orleans, Lousiana, 1, 171 (1992)

[10] Yim SS, Kwon YD, Korean J. Chem. Eng., 14(5), 354 (1997)