Abstract：The research exploring the restorative effects of Ammonia nitrogen, the Chemical oxygen demand concentration, Hydraulic shear force, adding sludge and Activated carbon powder for disintegrating the aerobic granular sludge, got the results firstly that the influent COD concentration and activated sludge and activated carbon had great influence on the restorative effects, but the effect of a single repair method was not unsatisfactory; secondly, taking the way of responding surface analysis concluded that the restoration of coupling was the best way with the Influent COD of 340mg/L, the activated carbon of 4.64g/L and activated sludge quality concentrations 2900mg/L. With 17days of operation, the disintegration of AGS has gotten the positive restorative effects. Observing the morphology from the appearance and scanning electron microscopy, it was found that the filamentous bacteria have dominated the surface of AGS,. simultaneously, the pore and fissure were greatly reduced, and the sludge formed new AGS with activated carbon as crystal nucleusThe particle size increased rapidly from (0.89±0.5)mm to (2.19±0.4)mm, the rate of ammonia oxidation (in LVSS) has been increased from 2.49mg/(g·h) to 3.18mg/(g·h), which proved that the restoration of coupling had the positive and rapid effect on disintegrating AGS.
Wu L, Peng C, Peng Y, et al. Effect of wastewater COD/N ratio on aerobic nitrifying sludge granulation and microbial population shift[J]. Journal of Environmental Sciences (China), 2012,24(2):234-241.
Chen Y, Jiang W, Liang D T, et al. Aerobic granulation under the combined hydraulic and loading selection pressures[J]. Bioresource Technology, 2008,99(16):7444-7449.
[4]
Zheng Y, Yu H, Liu S, et al. Formation and instability of aerobic granules under high organic loading conditions[J]. Chemosphere, 2006,63(10):1791-1800.
[5]
Moy B, Tay J H, Toh S K, et al. High organic loading influences the physical characteristics of aerobic sludge granules[J]. Letters In Applied Microbiology, 2002,34(6):407-412.
Adav S S, Lee D J, Lai J Y. Effects of aeration intensity on formation of phenol-fed aerobic granules and extracellular polymeric substances[J]. Appl. Microbiol. Biotechnol., 2007, 77(1):175-182.
Wang X H, Zhang H M, Yang F L, et al. Improved stability and performance of aerobic granules under stepwise increased selection pressure[J]. Enzyme and Microbial. Technology, 2007, 41(3):205-211.
Tay J H, Liu Q S, Liu Y. The effects of shear force on the formation, structure and metabolism of aerobic granules[J]. Applied Microbiology And Biotechnology, 2001,57(1/2):227-233.
Nogueira R, Melo L F, Purkhold U, et al. Nitrifying and heterotrophic population dynamics in biofilm reactors:effects of hydraulic retention time and the presence of organic carbon[J]. Water Res., 2002,36(2):469-481.
Yan L, Hu H, Zhang S, et al. Arsenic tolerance and bioleaching fromrealgar based on response surface methodology by Acidithiobacillus ferrooxidans isolated from Wudalianchi volcanic lake, northeast China[J]. Electronic Journal of Biotechnology, 2017,25:50-57.
Liu Y, Yang S F, Liu Q S, et al. The role of cell hydrophobicity in the formation of aerobic granules[J]. Curr. Microbiol., 2003, 46(4):270-274.
[27]
Tay J H, Liu Q S, Liu Y. Characteristics of aerobic granules grown on glucose and acetate in sequential aerobic sludge blanket reactors[J]. Environmental Technology, 2002,23(8):931-936.
