Óscar Jesús Prado Rubianes, María C. Veiga, Christian Kennes
A series of single- and multi-stage bioreactors were used for the removal of hazardous compounds commonly emitted from formaldehyde production in synthetic resinproducing factories, namely formaldehyde, methanol, dimethylether and carbon monoxide. An aerobic sludge obtained from the wastewater treatment facilities of one of these industries was used as biocatalyst, with good results. Also, carbon monoxide removal could be effectively performed by means of an Oligotropha carboxidovorans OM5 culture both in batch studies and in a biotrickling filter. A single-stage biotrickling filter was able to remove high concentrations of formaldehyde and methanol, and moderate concentrations of dimethylether. A three-stage system composed of three single bioreactors (BTF-BF-BTF) linked in series could carry on the removal of all four compounds, with elimination efficiencies around 100 % for both formaldehyde and methanol.
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