Abstract

GALINDO, Andres; TONCEL, Enrique  and  RINCON, Nancy. Evaluation of a biological filter as post-treatment wastewater unit using sea shells as support material. Rev. ion [online]. 2016, vol.29, n.2, pp.39-50. ISSN 0120-100X.  https://doi.org/10.18273/revion.v29n2-2016003.

In this research the efficiency of a biological filter (BF) is evaluated on a pilot scale, using seashells as support material (SM) for post-treatment of municipal wastewater (MWW) that came from pretreatment anaerobic-aerobic. The filter was subjected to various organic loadings, with hydraulic retention times (HRT) covered: 12.85; 10.71; 8.57 and 6.43h. The monitored parameters were: pH, carbonate and total alkalinity, temperature, chemical oxygen demand (COD), biochemical oxygen demand (BOD), volatile fatty acids (VFA), total Kjeldahl nitrogen (TKN), total phosphorus, total suspended solids (TSS), volatile (VSS) and fixed (SSF). The best removal efficiencies of organic matter were obtained TRH 10.71h recording CDOT, CODS and BOD5,20 removals, in the order of 51.5; 48.6 and 39.23%. However, the best efficiency in removing suspended solids was observed in the HRT of 6.43h (TSS, 29%, SSV, 23.8% and SSF, 50%). Despite receiving pretreatment, the number of total and fecal coliforms FB influent were high, showing orders up to 107MPN/100ml, the greater efficiencies in the removal of total and fecal coliforms were 97,24 and 94.63%, respectively, recorded in the TRH 12.85h. It is evident that the shells (Arca zebra) are sustainable SM and with these as MS achieve satisfactory reductions of organic matter in the treatment of ARM.

Keywords : Biological filter; municipal wastewater (ARM); seashells.

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