The Wind, Waves and Water Centre promotes the development of modelling tools for research and consulting purposes. The numerical models developed and used by our Staff fall under the following major headings:


BIOFLOC is mechanistic model that describes the interaction between water, mineral particles (sediment) and microbial biomass suspended in aqueous environments.

Nutrient normally dissolved in natural water bodies are absorbed to the surface of clay minerals suspended in water. Here, microorganisms find nutrient, and grow much faster than as free-living organisms. Aggregate-attached microorganisms have an impact on the aggregation and breakup processes of the suspended particle matter (SPM) and normally result in improved aggregation efficiency. Overall, the particle size distribution in biomass-free conditions is different than in biomass-affected conditions, with biomineral aggregates in average larger than only-mineral or only-organic aggregates.

The interaction between mineral particles and microorganisms has an important effect on the sedimentation and transport processes, since biomineral flocs have largely lower excess density than biomass-free aggregates. In addition, biomineral flocs have very different shapes than mineral flocs, thus microorganisms alter the hydrodynamics behaviour of the SPM in water.

Nutrient cycling in aqueous environments strongly depends on the microbial activity of suspended microorganisms, which depends in itself on the interaction with the mineral phase. Nutrient and contaminant transport and consumption in

Water quality is largely dictated by the rates at which nutrients and contaminants are diluted and consumed by microorganisms and, therefore, the understanding of the behaviour of biomineral flocs is essential for predicting the potential risks of water contamination and bio-remediation.

BIOFLOC has proven capability to predict the average aggregate size of SPM in biomass affected conditions, the nutrient consumption rate, and the bioremediation potential in a range of hydrodynamics and nutrient load conditions.


Content from Centre pending.


Content from Centre pending.