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Related Experiment Video

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Real-time Imaging and Quantification of Fungal Biofilm Development Using a Two-Phase Recirculating Flow System

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Published on: October 18, 2018

Microbial film development in a trickling filter.

W N Mack¹, J P Mack, A O Ackerson

¹Institute of Water Research and Department of Microbiology, Michigan State University, 48824, East Lansing, Michigan.

Microbial Ecology

|November 19, 2013

Summary

Biofilm development in wastewater filters involves bacterial attachment, matrix formation, and invasion by protozoa and algae. This complex ecosystem eventually detaches due to microbial activity and physical forces, initiating a new cycle.

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Area of Science:

Environmental microbiology
Wastewater treatment technologies
Biofilm science

Background:

Biofilms play a critical role in wastewater treatment processes.
Understanding the sequential development of biofilms is essential for optimizing filter efficiency.
Trickling filters are widely used in wastewater treatment, relying on biofilm formation.

Purpose of the Study:

To visualize and describe the sequential stages of biofilm development in a trickling wastewater filter.
To identify the key microbial players and their interactions during biofilm formation and maturation.

Main Methods:

Utilized transmission electron microscopy (TEM) and scanning electron microscopy (SEM).
Observed the physical and biological changes occurring on a hard surface within the filter over time.

Main Results:

Biofilm development begins with debris deposition and bacterial cell attachment, followed by matrix production.
Protozoa colonize the bacterial layer, feeding on bacteria, while algae proliferate on the matrix.
Competition for resources leads to bacterial aerial colony formation, and eventual biofilm detachment due to microbial degradation and physical forces.

Conclusions:

Biofilm development in trickling filters is a dynamic, multi-stage process involving bacteria, protozoa, and algae.
The cycle of biofilm formation, maturation, and detachment is crucial for the self-sustaining operation of trickling filters.
Further research can optimize conditions to enhance biofilm stability and treatment efficacy.