Related Experiment Video
Updated: Feb 8, 2026
14:42
Biology of Microbial Communities - Interview
Published on: May 28, 2007
9.1K
[Microbial Communities and Sludge Specific Resistance in Two SBRs Treating Leachate]
Li-Yun Cai1, Ze-Bin Huang1, Zi-Wei Xu1
1Fujian Key University Laboratory of Estuarine Ecological Security and Environmental Health, School of Environmental Science and Engineering of Xiamen University TanKah Kee College, Zhangzhou 363105, China.
Huan Jing Ke Xue= Huanjing Kexue
|July 3, 2018
Summary
Sunlight significantly alters microbial communities in sludge treatment, impacting filtration performance. Exposure to sunlight favored beneficial bacteria and rotifers, improving sludge characteristics, while darkness led to fungal bulking and reduced performance.
Area of Science:
- Environmental Microbiology
- Water Treatment Engineering
- Biotechnology
Background:
- Municipal solid waste incineration leachate poses treatment challenges.
- Active sludge processes are crucial for wastewater treatment.
- Understanding microbial dynamics is key to optimizing sludge performance.
Purpose of the Study:
- To investigate the impact of sunlight on microbial communities.
- To correlate microbial changes with sludge filtration performance.
- To assess sunlight's role in treating incineration leachate.
Main Methods:
- Operation of two sequencing batch reactors (SBRs) under identical conditions, with one exposed to sunlight (SBR1) and the other in darkness (SBR2).
- High-throughput sequencing for microbial population analysis.
- Measurement of sludge specific resistance.
Main Results:
- Sunlight exposure (SBR1) led to higher bacterial abundance and the dominance of *Thauera*, alongside rotifer presence, improving sludge filtration.
- Dark conditions (SBR2) resulted in higher fungal abundance, dominated by *Trichosporon*, causing filamentous bulking and increased sludge resistance.
- Significant differences in fungal and bacterial communities were observed between SBR1 and SBR2 due to sunlight.
Conclusions:
- Sunlight exposure positively influences microbial community structure in sludge treatment.
- Sunlight enhances sludge filtration performance by modulating microbial populations.
- Sunlight is a critical factor affecting sludge characteristics and treatment efficiency.
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