Abstract
Aerobic granules to treat wastewater containing methylene blue (MB) were successfully developed in a sequencing batch reactor (SBR) using activated sludge as inoculum. After cultivation for 87days, stable aerobic granules were obtained with a clearly defined shape and a diameters ranging from 2 to 4mm. After granulation, the removal efficiencies of MB and chemical oxygen demand (COD) reached 56% and 93%, respectively. Specific MB biodegradation rates followed the Haldane model and the associated kinetic parameters were as follows: Vmax=184.15mgL−1h−1, Ks=209.96mgL−1, and Ki=21.23mgL−1. The aerobic granules proved to be a feasible and effective way to degrade MB-containing wastewater.
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