Abstract

PACCO, Anyi et al. Proposal design parameters of a UASB reactor treating swine wastewater. Scientia Agropecuaria [online]. 2018, vol.9, n.3, pp.381-391. ISSN 2077-9917.  http://dx.doi.org/10.17268/sci.agropecu.2018.03.09.

The performance and efficiency of a UASB reactor of 1m3 was evaluated. It was fed with intensive pig farming wastewater, in order to obtain values of operating parameters, such as organic loading rate (OLR) and hydraulic retention time (HRT), to guide the industrial facilities design. To achieve this, the UASB reactor was operated under different hydraulic retention times (HRT). The UASB reactor efficiency on removal of total chemical oxygen demand (COD) and total suspended solids (TSS) was conditioned by the applied OLR and HRT, as well as the SST concentration in the influent. Applying a TRH equal to 4 days on the UASB reactor (average OLR of 1,6 kg COD.m-3.d-1.), the average total COD removal efficiency was 77,4%, while working with an HRT of 3 days, average OLR of 2,1 and 2,4 kg COD.m-3.d-1.), the average total COD removal reached average values of 72,1% and 70,7%, respectively, and the average TSS removal reached average values of 52,0% and 60,2%. Based on the results obtained, values suggested to be considered in UASB reactors design for the treatment of swine effluents similar to those presented in this study are OLR of 2,3 kg.m-3.d-1 and HRT equal to 3 days, to ensure the stability of the process.

Keywords : UASB reactor; wastewater; intensive pig farming.

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