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Rapid control of activated sludge bulking and simultaneous acceleration of aerobic granulation by adding intact aerobic granular sludge.

Abstract

The feasibility of rapidly controlling activated sludge bulking and accelerating aerobic sludge granulation was evaluated by adding intact aerobic granular sludge (AGS) to the bulking activated sludge (BAS) reactor. Two ratios of AGS to BAS (0.2 in the first reactor (R1), and 0.4 in the second reactor (R2)) were tested. The results indicate that the addition of AGS immediately improved the settling ability of BAS (sludge volume index at 30 min (SVI30) in R1 and R2 decreased from 173.1 mL/g to 130.8 and 91.3 mL/g, respectively) and gradually increased the biomass concentration (mixed liquor suspended solids (MLSS) in R1 and R2 increased to 4722 and 5190 mg/L, respectively), thus resolving the sludge bulking problem. Meanwhile, adding AGS not only promoted the BAS growth in aggregates, but also facilitated the selection of well-settling aggregates at an early stage. Consequently, the granulation process was significantly accelerated. The granulation time in R1 and R2 was 14 and 10 days, respectively, indicating that the higher ratio of AGS to BAS can result in the faster granulation. Partial nitrification could be maintained during the BAS granulation process when the initial inoculation of nitritation sludge was large enough. Additionally, the microbial community changed during the BAS granulation process. The genera Thauera and Zoogloea belonging to family Rhodobacteraceae were speculated to play an important role in the BAS granulation.

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  • Publisher Full Text
  • Authors+Show Affiliations

    ,

    Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.

    ,

    College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China.

    ,

    Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.

    ,

    Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.

    ,

    Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.

    ,

    Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.

    Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China. Electronic address: tanweilijun@zjut.edu.cn.

    Source

    The Science of the total environment 674: 2019 Jul 15 pg 105-113

    MeSH

    Aerobiosis
    Biomass
    Bioreactors
    Microbiota
    Nitrification
    Sewage
    Thauera
    Waste Disposal, Fluid

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    31004888

    Citation

    Zou, Jinte, et al. "Rapid Control of Activated Sludge Bulking and Simultaneous Acceleration of Aerobic Granulation By Adding Intact Aerobic Granular Sludge." The Science of the Total Environment, vol. 674, 2019, pp. 105-113.
    Zou J, Pan J, Wu S, et al. Rapid control of activated sludge bulking and simultaneous acceleration of aerobic granulation by adding intact aerobic granular sludge. Sci Total Environ. 2019;674:105-113.
    Zou, J., Pan, J., Wu, S., Qian, M., He, Z., Wang, B., & Li, J. (2019). Rapid control of activated sludge bulking and simultaneous acceleration of aerobic granulation by adding intact aerobic granular sludge. The Science of the Total Environment, 674, pp. 105-113. doi:10.1016/j.scitotenv.2019.04.006.
    Zou J, et al. Rapid Control of Activated Sludge Bulking and Simultaneous Acceleration of Aerobic Granulation By Adding Intact Aerobic Granular Sludge. Sci Total Environ. 2019 Jul 15;674:105-113. PubMed PMID: 31004888.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Rapid control of activated sludge bulking and simultaneous acceleration of aerobic granulation by adding intact aerobic granular sludge. AU - Zou,Jinte, AU - Pan,Jiyang, AU - Wu,Shuyun, AU - Qian,Mengjie, AU - He,Zhanfei, AU - Wang,Binbin, AU - Li,Jun, Y1 - 2019/04/03/ PY - 2019/02/12/received PY - 2019/03/29/revised PY - 2019/04/01/accepted PY - 2019/4/21/pubmed PY - 2019/5/15/medline PY - 2019/4/21/entrez KW - Activated sludge bulking KW - Aerobic granular sludge KW - Microbial community KW - Partial nitrification KW - Settling ability SP - 105 EP - 113 JF - The Science of the total environment JO - Sci. Total Environ. VL - 674 N2 - The feasibility of rapidly controlling activated sludge bulking and accelerating aerobic sludge granulation was evaluated by adding intact aerobic granular sludge (AGS) to the bulking activated sludge (BAS) reactor. Two ratios of AGS to BAS (0.2 in the first reactor (R1), and 0.4 in the second reactor (R2)) were tested. The results indicate that the addition of AGS immediately improved the settling ability of BAS (sludge volume index at 30 min (SVI30) in R1 and R2 decreased from 173.1 mL/g to 130.8 and 91.3 mL/g, respectively) and gradually increased the biomass concentration (mixed liquor suspended solids (MLSS) in R1 and R2 increased to 4722 and 5190 mg/L, respectively), thus resolving the sludge bulking problem. Meanwhile, adding AGS not only promoted the BAS growth in aggregates, but also facilitated the selection of well-settling aggregates at an early stage. Consequently, the granulation process was significantly accelerated. The granulation time in R1 and R2 was 14 and 10 days, respectively, indicating that the higher ratio of AGS to BAS can result in the faster granulation. Partial nitrification could be maintained during the BAS granulation process when the initial inoculation of nitritation sludge was large enough. Additionally, the microbial community changed during the BAS granulation process. The genera Thauera and Zoogloea belonging to family Rhodobacteraceae were speculated to play an important role in the BAS granulation. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/31004888/Rapid_control_of_activated_sludge_bulking_and_simultaneous_acceleration_of_aerobic_granulation_by_adding_intact_aerobic_granular_sludge L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(19)31519-0 DB - PRIME DP - Unbound Medicine ER -