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Related Experiment Video

Updated: Jun 18, 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

Degrading high-strength phenol using aerobic granular sludge.

Kuo-Ling Ho¹, Yu-You Chen, Bin Lin

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

Applied Microbiology and Biotechnology

|November 11, 2009

Summary

This summary is machine-generated.

Aerobic granules effectively degrade high-strength phenol wastewater up to 5,000 mg/L, outperforming activated sludge. Pretreatment with acid or alkaline solutions maintained granule efficiency in phenol biodegradation.

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Area of Science:

Environmental Science
Microbiology
Biotechnology

Background:

High-strength phenol wastewater poses environmental challenges.
Conventional activated sludge processes show inhibition at phenol concentrations above 3,000 mg/L.
Aerobic granules offer a potential solution for recalcitrant wastewater treatment.

Purpose of the Study:

To evaluate the efficacy of aerobic granules in degrading high-strength phenol wastewater.
To compare the performance of aerobic granules with activated sludge in phenol biodegradation.
To assess the impact of acid or alkaline pretreatment on granule stability and function.

Main Methods:

Batch experiments utilizing acclimated aerobic granules.
Phenol concentration monitoring during degradation.
Analysis of microbial communities using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE).
Acid and alkaline pretreatment of granules.

Main Results:

Aerobic granules successfully degraded phenol up to 5,000 mg/L without significant inhibition.
Activated sludge showed inhibited biodegradation at phenol concentrations exceeding 3,000 mg/L.
Granules maintained acceptable phenol degradation rates after acid or alkaline pretreatment.
Microbial community analysis revealed distinct structures in granules versus activated sludge.

Conclusions:

Aerobic granules are a robust and effective solution for treating high-strength phenol wastewater.
Granule stability and performance are maintained even after chemical pretreatment.
Aerobic granulation technology presents a promising alternative to conventional activated sludge for recalcitrant organic pollutant removal.