Abstract

MATSUMOTO, Tsunao  and  SANCHEZ-ORTIZ, Iván Andrés. Performance of the anaerobic lagoons with dividing baffle and facultative of the wwtp of Santa Fe do Sul (São Paulo, Brazil). Rev. ing. univ. Medellín [online]. 2016, vol.15, n.29, pp.27-42. ISSN 1692-3324.  https://doi.org/10.22395/rium.v15n29a2.

The main objective of this research was to evaluate the performance of the sewage treatment plant (stp) of Santa Fe do Sul in the different climatic seasons. A bathymetric survey of the anaerobic and facultative lagoons was carried out to determine the sludge accumulation profiles and esti mate the hydraulic retention time of the units; Three-stage monitoring of the raw sewage and the ponds’ effluents for 3-months long each was carried out. The average removal of the biochemical oxygen demand (bod) was 78.6 %, lower than the minimum efficiency allowed by the current Brazilian legislation; the amount of fecal coliforms (fc) and the settleable solids volume exceeded the permitted values by the regulation. The stp needs maintenance on the anaerobic lagoon and a post-treatment system to guarantee additional bod, fc and solids removal on the final effluent.

Keywords : urban wastewater; waste stabilization ponds; performance evaluation.

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