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Accelerating Aerobic Sludge Granulation by Adding Dry Sewage Sludge Micropowder in Sequencing Batch Reactors

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Listed:
  • Jun Li

    (College of Biological and Environmental Engineering, Zhejiang University of Technology, No.18 Chao Wang Road, Hangzhou 310014, China
    College of Civil Engineering and Architecture, Zhejiang University of Technology, No.18 Chao Wang Road, Hangzhou 310014, China)

  • Jun Liu

    (College of Biological and Environmental Engineering, Zhejiang University of Technology, No.18 Chao Wang Road, Hangzhou 310014, China)

  • Danjun Wang

    (College of Civil Engineering and Architecture, Zhejiang University of Technology, No.18 Chao Wang Road, Hangzhou 310014, China)

  • Tao Chen

    (College of Civil Engineering and Architecture, Zhejiang University of Technology, No.18 Chao Wang Road, Hangzhou 310014, China)

  • Ting Ma

    (College of Civil Engineering and Architecture, Zhejiang University of Technology, No.18 Chao Wang Road, Hangzhou 310014, China)

  • Zhihong Wang

    (Zhejiang Zone King Engineering Technology Co. Ltd., 14B, Hangzhou 310000, China)

  • Weilong Zhuo

    (Zhejiang Zone King Engineering Technology Co. Ltd., 14B, Hangzhou 310000, China)

Abstract

Micropowder (20–250 µm) made from ground dry waste sludge from a municipal sewage treatment plant was added in a sequencing batch reactor (R2), which was fed by synthetic wastewater with acetate as carbon source. Compared with the traditional SBR (R1), aerobic sludge granulation time was shortened 15 days in R2. Furthermore, filamentous bacteria in bulking sludge were controlled to accelerate aerobic granulation and form large granules. Correspondingly, the SVI decreased from 225 mL/g to 37 mL/g. X-ray Fluorescence (XRF) analysis demonstrated that Al and Si from the micropowder were accumulated in granules. A mechanism hypotheses for the acceleration of aerobic granulation by adding dry sludge micropowder is proposed: added micropowder acts as nuclei to induce bacterial attachment; dissolved matters from the micropowder increase abruptly the organic load for starved sludge to control overgrown filamentous bacteria as a framework for aggregation; increased friction from the movement of micropowder forces the filaments which extend outwards to shrink for shaping granules.

Suggested Citation

  • Jun Li & Jun Liu & Danjun Wang & Tao Chen & Ting Ma & Zhihong Wang & Weilong Zhuo, 2015. "Accelerating Aerobic Sludge Granulation by Adding Dry Sewage Sludge Micropowder in Sequencing Batch Reactors," IJERPH, MDPI, vol. 12(8), pages 1-10, August.
    • Handle: RePEc:gam:jijerp:v:12:y:2015:i:8:p:10056-10065:d:54588
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    Cited by:

    1. Omar Alagha & Ahmed Allazem & Alaadin A. Bukhari & Ismail Anil & Nuhu Dalhat Mu'azu, 2020. "Suitability of SBR for Wastewater Treatment and Reuse: Pilot-Scale Reactor Operated in Different Anoxic Conditions," IJERPH, MDPI, vol. 17(5), pages 1-13, March.

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