Granular Biofilms
Granular Biofilms - Related Videos
06:10
Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge
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Cited by 201 •
2016
The protocol provides a methodology to solubilize aerobic granular sludge in order to extract alginate-like extracellular polymers (ALE).
04:34
Isolating and Culturing Murine Cerebellar Granular Neuron Progenitors
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2025
This video demonstrates the isolation and cultivation of cerebellar neural progenitor cells from a mouse pup's cerebellum. Cerebellar granule neuron progenitors are isolated and purified through differential adhesion, effectively removing astrocytes. These cultured progenitors subsequently differentiate into cerebellar granule neurons.
09:03
Growth of Mycobacterium tuberculosis Biofilms
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Cited by 79 •
2012
Mycobacterium tuberculosis forms drug tolerant biofilms when cultured in certain conditions. Here we describe methods for culturing M. tuberculosis biofilms and determining the frequency of drug tolerant persisters. These protocols will be useful for further studies into the mechanisms of drug tolerance in M. tuberculosis.
10:17
Methodologies for Studying B. subtilis Biofilms as a Model for Characterizing Small Molecule Biofilm Inhibitors
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Cited by 28 •
2016
This study presents the development of reproducible methodologies to study biofilm inhibitors and their effects on Bacillus subtilis multicellularity.
03:57
Microtiter Dish Biofilm Formation Assay
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Cited by 2243 •
2011
The assay describes a rapid means to measure early biofilm formation in bacteria and fungi. This method uses a microtiter plate as the substratum for microbial biofilm formation, and the biofilm is visualized using crystal violet strain. The assay provides either a qualitative or quantitative assay for early biofilm formation.
FAQs
Limited diffusion is the key mechanism that organizes a granule. As substrates and oxygen move inward, chemical gradients develop, allowing aerobic, anoxic, and anaerobic zones to coexist. This spatial separation lets different microbial activities transform organic matter, nitrogen, and pollutants within one aggregate at once.
The EPS matrix gives cells a shared structural environment that helps maintain the granule’s compact form. Because microorganisms produce it themselves, its presence links community organization with physical stability. In treatment systems, this structure contributes to strong settling and helps the biofilm withstand fluctuating conditions more effectively.
Internal zoning supports coordinated metabolism by placing microbial activities in different chemical conditions inside the same aggregate. Aerobic, anoxic, and anaerobic regions can therefore operate alongside one another rather than requiring completely separate communities. This arrangement enables transformations of organic matter, nitrogen, and other pollutants, making the granule relevant to integrated environmental processing.
Formation and stability determine whether the organized microbial community can function reliably in a reactor. Understanding these properties helps researchers and engineers relate granule structure to settling behavior, layered activity, and resistance to changing conditions. That knowledge informs treatment design aimed at maintaining effective environmental processing rather than simply creating microbial aggregates.
In wastewater treatment, granular biofilms provide the biological foundation for aerobic granular sludge and related reactor systems. Their compact structure supports layered microbial activity while their strong settling properties help maintain biomass within the treatment process. These characteristics can improve reactor performance and support treatment of organic matter, nitrogen, and other pollutants.
Granular biofilm systems can improve reactor performance while reducing space and energy demands. Their dense, well-settling aggregates concentrate microbial activity and support several chemical zones within the same community. For environmental biotechnology, this combination makes them useful for developing more compact treatment processes that remain effective under fluctuating conditions.