Inderscience Publishers

The essential role of filling material in aerobic granular biomass generation in a periodic submerged biofilter

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The paper reports the results of a laboratory-scale investigation aimed at evaluating the influence of the filling material of a Sequencing Submerged Biofilter Reactor (SSBR) on granular biomass generation. The results showed that aerobic granular biomass generation was obtained only in the reactor filled with kmt-k1 carrier, since the features of this filling media are such that they generate a bed characterised by rather uniform internal and external small-sized pore volumes able to retain the released biofilm particles. Finally, the aerobic granule formation improved the biomass retention efficiency and reduced the excess sludge production.

Keywords: aerobic granulation, periodic submerged biofilters, filling material features, shear forces, biomass density, granular biomass production, sequencing submerged biofilter reactors, SSBR, biofilm particles, excess sludge, wastewater treatment

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