Abstract

RESTREPO, Alfoncina; C. RODRIGUEZ, Diana  and  A. PENUELA, Gustavo. Efficiency of an SBR reactor for the removal of the organic matter present in the wastewater of a flower dyeing industry. Rev. ion [online]. 2021, vol.34, n.1, pp.47-59.  Epub Jan 01, 2021. ISSN 0120-100X.  https://doi.org/10.18273/revion.v34n1-2021005.

The implementation of an SBR reactor (Sequencing Batch Reactor- for its acronym in English and Sequential Reactor in Discontinuous- in Spanish) was carried out for the removal of organic matter present in the wastewater of a flower dyeing company. Physicochemical parameters were analyzed to evaluate the efficiency of the process and biomass monitoring through sedimentation tests and microscopic observations. The SBR system was operated using a static filling phase for 2 h, a reaction step for 8 h (4 h of aeration and 4 h of mixing) and finally a sedimentation step for 2 h, for a total of 12 hours per cycle and 2 cycles per day and two azo dyes (C1 and C2) widely used in the flower dyeing industry were evaluated, temporarily varying the concentration of organic matter in terms of COD with values of 3.0 g/L.d and 7.0 g/L.d The experimental results and statistical analysis allowed to analyze the behavior of the SBR reactor, concluding that both colorants behaved statistically the same in the removal of total organic carbon (TOC), with an average removal value of 92.02% for C1 and 94.60% for C2 with a loading of 3.0 g COD/L.d and 96.69% for C1 and 98.30% for C2 with a loading of 7.0 g COD/L.d The biomass presented a low SVI, indicating a good sedimentability for both the tests carried out with C1 and C2. Finally, the microorganisms identified in the biomass allowed to corroborate the efficiency of the treatment system, since rotifers and fixed ciliates with C1 and free ciliates with C2 abounded, which are indicators of good efficiency in the treatment processes and, in turn, high sludge age indicators, which contrasts with the sludge age used in this study (θc = 15 d).

Keywords : Dyes; Organic material; Biological processes; Aerobic reactor; Anaerobic reactor.

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