Journal article

Publication year: 2002

Pages: 677-684

Journal: Environmental Technology

Volume number: 23

Issue number: 6

ISSN: 0959-3330

DOI Link: https://doi.org/10.1080/09593332308618383

Publisher: Taylor and Francis Group

Abstract: 
Aerobic sludge granulation was achieved in an activated sludge process continuously fed with lime (Ca2+ 100 mg l(-1) influent) every other day. Eighteen days after lime addition, activated sludge granules with the size of 0.5-2.2 mm were formed, which occupied 10-25% of total sludge volume. Sludge volume index (SVI) was reduced to an average of 50 ml g(-1), which increased average sludge concentration to 3.6-5.0 gVSS l(-1), 1.6-2.1 times of that of control. Greenhouse gas NO emission was also significantly reduced: N2O concentration from the lime-addition reactor was 5-15 ppmv, 47-61% of that of control. Effluent PO.-P concentration was generally lower than 1 mgl(-1) when average influent PO4-P concentration was 6.07-6.37 mgl(-1) . Total phosphorus (TP) and total nitrogen (TN) removal efficiencies were around 89.6% and 14.5-16.1%, over 3.5 and 1 times higher than those of control, respectively. COD removal rate in the lime-addition reactor was 2.05-2.48 kgCODm(-3)d(-1), higher than 1-34-1.61kgCOD m(-3)d(-1) in the control.

Harvard Citation style: Wu, X., Guan, Y., Zhang, X., Huang, X. and Qian, Y. (2002) Phosphorus removal and greenhouse gas N₂O emission in a lime-induced aerobic sludge granule process, Environmental Technology, 23(6), pp. 677-684. https://doi.org/10.1080/09593332308618383

APA Citation style: Wu, X., Guan, Y., Zhang, X., Huang, X., & Qian, Y. (2002). Phosphorus removal and greenhouse gas N₂O emission in a lime-induced aerobic sludge granule process. Environmental Technology. 23(6), 677-684. https://doi.org/10.1080/09593332308618383