Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 164, Issue 2-3, Pages 1223-1227Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2008.09.034
Keywords
Aerobic granular sludge; Domestic wastewater; Simultaneous nitrification and denitrification
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The performance of a sequencing batch reactor (SBR) seeded with aerobic granular sludge was studied. The lab-scale SBR treating domestic wastewater operated at a volumetric loading rate (VLR) of 0.75-3.41 kg COD/(m(3) d). The granule stability was related to the organic loading, and high loading would be favorable for granule stability. Analysis of typical cycle showed that granular sludge had good ability to simultaneously remove nitrogen and phosphorus. Most organic substances were removed at the anaerobic stage. At the aerobic stage, simultaneous nitrification and denitrification (SND) happened with phosphorus absorption. The SBR had good removal performance for organic matter and phosphate. However, the total nitrogen (TN) removal performance was ordinary, with average removal efficiency of about 52%. Batch experiments indicated that increases of influent C/N ratio and a large percentage of granule in the sludge were conducive for SND in SBR. (C) 2008 Elsevier B.V. All rights reserved.
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