Investigation on the formation and kinetics of glucose-fed aerobic granular sludge |
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| Institution: | 1. Department of Environmental Science and Engineering, School of Civil and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China;2. College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150080, PR China;3. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;1. Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, CA 92521, USA;2. Atlantic Ecology Division, US Environmental Protection Agency, Narragansett, RI, 02882, USA;3. Department of Civil Engineering, University of New Mexico, Albuquerque, NM 87131-0001, USA;1. Université Clermont Auvergne, CS 60032, 63001 Clermont-Ferrand, France;2. Institut Pascal, UMR CNRS 6602 Team GePEB, Chemical Engineering, Applied Thermodynamics and Biosystems, BP 10448, F-63000 Clermont-Ferrand, France;3. Institut Pascal, UMR CNRS 6602 Team PHOTON, Photonics, Waves, Nanomaterials, BP 10448, F-63000 Clermont-Ferrand, France;4. Aix-Marseille Université, INRA, Polytech’ Marseille, UMR 1163 Biodiversité et Biotechnologie Fongiques, 163 Avenue de Luminy, CP225, 13288 Marseille Cedex 09, France;1. Department of Environmental Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan 316022, China;2. Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China;3. School of the Environment, Nanjing University, Nanjing 210023, China |
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| Abstract: | Aerobic granular sludge was cultivated in a glass sequencing batch reactor (SBR) with glucose synthetic wastewater. The spherical shaped granules were observed on 4th day with the mean diameter of 0.1 mm. With the increase of chemical oxygen demand (COD) concentration of the influent, aerobic granules grew matured, the size of which ranged from 1.2 to 1.9 mm. The aerobic granular sludge could sustain high organic loading rate (about 4.0 g COD L?1 d?1), with good settling ability (settling velocity 36 m/h) and high biomass concentration (MLSS 6.7 ±0.2 g/L). Experimental data indicated that the substrate utilization and biomass growth kinetics followed Monod's kinetics model approximately. The corresponding kinetic coefficients of maximum specific substrate utilization rate (k), half velocity coefficient (Ks), growth yield coefficient (Y) and decay coefficient (Kd) were 13.2 d?1, 275.8 mg/L, 0.183–0.250 mg MLSS/mg COD and 0.023–0.075 d?1, respectively, which made aerobic granules have short setup period, high rate of substrate utilization and little surplus sludge. |
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