TY - GEN
T1 - A novel circulating fluidized bed-bioreactor in biological nutrient removal from municipal wastewater
AU - Chowdhury, N.
AU - Zhu, J.
AU - Nakhla, G.
AU - Islam, M. N.
PY - 2008
Y1 - 2008
N2 - The objective of this study was to examine the feasibility of a novel liquid-solid circulating fluidized bed bioreactor (LS-CFBBR) in municipal wastewater treatment. The CFBBR employs attached microbial films for biodegradation of both organics and nutrients, in both soluble and particulate forms, within a single circulating fluidized bed unit. This new technology combines the more compact and efficient fixed-film process with the recently developed biological nutrient removal (BNR) process that provide the additional removal of nitrogen and phosphorous. A lab-scale CFBBR has been demonstrated to treat synthetic wastewater and degritted municipal wastewater. The CFBBR was operated at an empty bed contact time (EBCT) of 0.82 hours with and without particle recirculation. Without particle recirculation, the CFBBR was able to achieve carbon (C), total nitrogen (N) and phosphorous (P) removal efficiencies of 94%, 80% and 65% respectively, whereas with particle recirculation, 91%, 78% and 85% removals of C, N and P were achieved. The system was able to generate tertiary effluent quality characterized by BOD5 <5 mg/L, TSS of <5 mg/L, ammonia-nitrogen <1 mg/L, total nitrogen <7 mg/L, phosphorus <1 mg/L. Combination of nitrification, denitrification and biological phosphorus removal in one unit saves space, reduces energy consumption and also produces less sludge, approximately 0.13 gVSS/gCOD, which is one-third of the conventional treatment processes.
AB - The objective of this study was to examine the feasibility of a novel liquid-solid circulating fluidized bed bioreactor (LS-CFBBR) in municipal wastewater treatment. The CFBBR employs attached microbial films for biodegradation of both organics and nutrients, in both soluble and particulate forms, within a single circulating fluidized bed unit. This new technology combines the more compact and efficient fixed-film process with the recently developed biological nutrient removal (BNR) process that provide the additional removal of nitrogen and phosphorous. A lab-scale CFBBR has been demonstrated to treat synthetic wastewater and degritted municipal wastewater. The CFBBR was operated at an empty bed contact time (EBCT) of 0.82 hours with and without particle recirculation. Without particle recirculation, the CFBBR was able to achieve carbon (C), total nitrogen (N) and phosphorous (P) removal efficiencies of 94%, 80% and 65% respectively, whereas with particle recirculation, 91%, 78% and 85% removals of C, N and P were achieved. The system was able to generate tertiary effluent quality characterized by BOD5 <5 mg/L, TSS of <5 mg/L, ammonia-nitrogen <1 mg/L, total nitrogen <7 mg/L, phosphorus <1 mg/L. Combination of nitrification, denitrification and biological phosphorus removal in one unit saves space, reduces energy consumption and also produces less sludge, approximately 0.13 gVSS/gCOD, which is one-third of the conventional treatment processes.
UR - http://www.scopus.com/inward/record.url?scp=84904808590&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84904808590
SN - 9783930400577
T3 - CFB 2008 - Proceedings of the 9th Int. Conference on Circulating Fluidized Beds, in Conjunction with the 4th International VGB Workshop "Operating Experience with Fluidized Bed Firing Systems"
BT - CFB 2008 - Proceedings of the 9th Int. Conference on Circulating Fluidized Beds, in Conjunction with the 4th International VGB Workshop "Operating Experience with Fluidized Bed Firing Systems"
PB - TuTech Innovation GmbH
T2 - 9th International Conference on Circulating Fluidized Beds, CFB 2008, in Conjunction with the 4th International VGB Workshop on Operating Experience with Fluidized Bed Firing Systems
Y2 - 13 May 2008 through 16 May 2008
ER -
