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Updated: Nov 17, 2025
Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity
Published on: March 11, 2015
Biofilm development in a pilot-scale gravity sewer: Physical characteristics, microstructure, and microbial
Feixiang Zan1, Gang Guo2, Tianlong Zheng3
1School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China; Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong.
Sewer biofilms develop over 45 days, altering pipe characteristics and microbial communities. Understanding this biofilm formation is key for managing sewer maintenance and controlling sulfide production.
Area of Science:
- Environmental microbiology
- Wastewater engineering
- Material science
Background:
- Sewer biofilms cause environmental issues like toxic gas release and pipe corrosion.
- Investigating sewer biofilm formation is crucial for effective sewer operation and maintenance.
Purpose of the Study:
- To analyze the physical characteristics, microstructure, and microbial community changes in sewer biofilms.
- To understand the correlation between biofilm development and environmental impacts.
Main Methods:
- Pilot-scale gravity sewer experiment over 45 days.
- Analysis of physical properties (organic content, thickness, density).
- Microbial community analysis and microelectrode measurements.
Main Results:
- Biofilm growth led to increased organic content (62 g VS/m²), thickness (1.2 mm), and density (89 mg/cm³).
- Microbial communities shifted, promoting facultative bacteria and anaerobes.
- Mature biofilms developed anaerobic zones with significant sulfide production (-105 mV, 0.1 μmol/L).
Conclusions:
- Microbial community migration is linked to evolving biofilm physical characteristics and microstructure.
- Findings offer insights for sulfide control strategies in sewer maintenance.
