Abstract

VASQUEZ, Edgardo; TRAPOTE, Arturo  and  PRATS, Daniel. Elimination of pesticides with a membrane bioreactor and two different sludge retention times. Tecnol. cienc. agua [online]. 2018, vol.9, n.5, pp.198-217.  Epub Nov 24, 2020. ISSN 2007-2422.  https://doi.org/10.24850/j-tyca-2018-05-08.

This research evaluated the efficiency of a membrane bioreactor (MBR) to eliminate pesticides. It also demonstrated that the presence of pesticides did not influence the efficiency of elimination of organic matter. Sixteen pesticides were studied, which were used to dope a synthetic urban residual water. The research was carried out in a pilot scale MBR plant, operated at a sludge retention time (SRT) of 30 and 60 days, with a mass loading of 0.23 kgCOD∙kgVSS-1·d-1 and average flow of 5.44 L∙m-2h-1. The results showed that triazines and linuron have a lower degree of elimination, with the best results being 60 days TRC with values between 73% and 82%, while organochlorines were reduced in the order of 90% and 99%. This technology can result in an excellent effluent quality, allowing it to be reused and contributing to maintain the good ecological state of the receiving environment.

Keywords : Membrane bioreactor; chemical oxygen demand; micropollutants; pesticides; sludge retention time; heterotrophic biomass.

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