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Updated: Jun 22, 2026

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge

Published on: September 26, 2016

Aerobic granulation in sequencing batch reactors at different settling times.

Sunil S Adav¹, Duu-Jong Lee, Juin-Yih Lai

¹Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.

Bioresource Technology

|June 23, 2009

Summary

Controlling microbial communities with short settling times enhances aerobic granulation. Early granulation and enrichment of functional strains are achieved by optimizing settling periods.

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Area of Science:

Environmental microbiology
Wastewater treatment technologies

Background:

Aerobic granulation is a crucial process in wastewater treatment, forming dense microbial aggregates.
Controlling microbial community structure is key to efficient aerobic granulation.
Settling time is a critical operational parameter influencing granule formation.

Purpose of the Study:

To investigate the effect of different settling times on aerobic granulation.
To understand how settling times influence microbial community composition within granules.
To determine the optimal settling time for enhanced aerobic granulation.

Main Methods:

Aerobic granulation was induced using different settling times.
Microbial communities within the granules were analyzed.
Granule characteristics and stability were monitored.

Main Results:

Early aerobic granulation was observed at a settling time of 5 minutes.
Short settling times enriched functional microbial strains, excluding non-flocculating ones.
Initial settling time significantly impacts the efficiency of subsequent granulation.

Conclusions:

Optimizing settling time is an effective strategy to enhance aerobic granulation.
Short settling times promote the development of robust and efficient aerobic granules.
This approach facilitates the enrichment of desired microbial communities for improved wastewater treatment.