Biological Filters: Trickling and RBC Design

Microbial populations of autotrophic nitrifying microorganisms were developed, that can withstand the inhibitory factors present in the aquaculture environment and function well in their presence. These microorganisms were further developed to possess high affinity to biofilter solid supports, such as plastic beads, enabling us to attach them to the supports in a strong and long-lasting way. By pre-coating these microorganisms onto biofilter solid supports, the start up time needed to operate nitrifying filters was practically eliminated. The activity of the microbially pre-coated biofilter solid supports was better than that of un-coated, conventional biofilter solid supports, and lasted for many months in fresh and seawater rearing facilities.

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