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Anaerobic-aerobic sequential biofilters packed with polyurethane/polypyrrole-co-polyaniline and constructed wetland for municipal wastewater treatment - RIIIT
Anaerobic-aerobic sequential biofilters packed with polyurethane/polypyrrole-co-polyaniline and constructed wetland for municipal wastewater treatment
Due to the growing demand and the current water problems, efficient and economical wastewater treatment systems are required to promote the reuse of this resource. The objective of this work was to evaluate the performance of a sequential system consisting of two anaerobic-aerobic biofilters and a constructed wetland at different hydraulic retention times (HRT) in treating municipal wastewater (MWW). The biofilters were packed with polyurethane/polypyrrole-co-polyaniline composites as support for biofilm formation. The constructed wetland contained tezontle as substratum for Canna indica plants. The parameters analyzed were chemical oxygen demand (COD), biochemical oxygen demand (BOD5), fecal coliforms (FC), helminth eggs (HE) and total solids (TS). It was observed that the removal of these parameters increased in direct proportion to the HRT, achieving up to 93% removal efficiency for COD, 99% for BOD5, 28% removal in TS, FC decreased from 1×106± 1 to 1×101± 1 MPN/100 mL and HEs decreased from being uncountable to 3 ± 3 HE/L, operating at a HRT of 9.9 days.
Keywords: biofilter, composites, Canna indica, constructed wetland, municipal wastewater treatment.
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