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A steady-state model was developed to predict the biofilm thickness, microbial distribution and substrate fluxes based on the microbial interactions in multispecies biofilms under the action of an electric field. The experimental evaluations were carried out in completely mixed biofilm reactors where nitrifying bacteria compete with glucose-utilizing heterotrophs. The experimental results showed that...
The nitrifying bacteria in activated sludge and biofilms consisting of the bacteria immobilized on polypropylene packing were subjected to an electric current via two electrodes. In activated sludge, the metabolism of nitrifying bacteria was inhibited when the applied current was over 2.5 A m−2, whilst in biofilms, inhibition began when the current reached 5 A m−2. At 15 A m−2, the nitrification rate...
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