Performance and Stability of Algal-Bacterial Aerobic Granular Sludge in Batch Column and Tubular Reactors

  • Sanha Kaizer Tajamul Basha
  • Caixing Tian
  • Zhongfang LeiEmail author
  • Zhenya Zhang
  • Kazuya Shimizu
Conference paper
Part of the Environmental Science and Engineering book series (ESE)


The effect of a tubular reactor design on nutrients removal and granular stability of algal-bacterial aerobic granular sludge (AB-AGS) was investigated. A batch tubular reactor and a column reactor were operated in parallel under different upflow air velocities, i.e., 1, 0.5 and 0 cm/s to compare their performance. Due to the virtue of its geometry, the tubular reactor required 3.25 times lower aeration rate as compared to the column reactor. Experimental results showed that even under lower aeration rates, the nutrients removal efficiency by the tubular reactor remained almost similar to the column reactor. A upflow air velocity of 0.5 cm/s provided the optimum condition for granular stability, achieving 83.5% of dissolved organic carbon removal and 71.5% of total nitrogen removal by the tubular reactor. There was a marked increase in chlorophyll a concentration in the tubular reactor, indicating faster algae growth, which could be attributed to the better light incidence capacity of the reactor design. Thus, a tubular reactor design can be a viable alternative for a novel low aeration wastewater treatment system.


Algal-bacterial aerobic granular sludge (AB-AGS) Tubular reactor Granular stability Nutrient removal Low aeration rate 


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© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Sanha Kaizer Tajamul Basha
    • 1
  • Caixing Tian
    • 1
  • Zhongfang Lei
    • 1
    Email author
  • Zhenya Zhang
    • 1
  • Kazuya Shimizu
    • 1
  1. 1.Graduate School of Life and Environmental SciencesUniversity of TsukubaTsukubaJapan

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