Biblioteca do Café

URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1

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2013 - 20142

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Autor: search.filters.author.Pereira, Erlon Lopes

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    Kinetic parameters of biomass growth in a UASB reactor treating wastewater from coffee wet processing (WCWP)
    (Instituto de Pesquisas Ambientais em Bacias Hidrográficas, 2014) Campos, Claudio Milton Montenegro; Prado, Marco Antonio Calil; Pereira, Erlon Lopes
    This study evaluated the treatment of wastewater from coffee wet processing (WCWP) in an anaerobic treatment system at a laboratory scale. The system included an acidification/equalization tank (AET), a heat exchanger, an Upflow Anaerobic Sludge Blanket Reactor (UASB), a gas equalization device and a gas meter. The minimum and maximum flow rates and volumetric organic loadings rate (VOLR) were 0.004 to 0.037 m3 d-1 and 0.14 to 20.29 kgCOD m-3 d-1, respectively. The kinetic parameters measured during the anaerobic biodegradation of the WCWP, with a minimal concentration of phenolic compounds of 50 mg L-¹, were: Y = 0.37 mgTVS (mgCODremoved)-1, Kd = 0.0075 d-1, Ks = 1.504mg L-1, μmax = 0.2 d-1. The profile of sludge in the reactor showed total solids (TS) values from 22,296 to 55,895 mg L-1 and TVS 11,853 to 41,509 mg L-1, demonstrating a gradual increase of biomass in the reactor during the treatment, even in the presence of phenolic compounds in the concentration already mentioned.
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    Characterization of the biomass of a hybrid anaerobic reactor (HAR) with two types of support material during the treatment of the coffee wastewater
    (Instituto de Tecnologia do Paraná - Tecpar, 2013-05) Silva, Vivian Galdino da; Campos, Cláudio Milton Montenegro; Pereira, Erlon Lopes; Silva, Júlia Ferreira da
    This study investigated the microbiology of a hybrid anaerobic reactor (HAR) in the removal of pollutant loads. This reactor had the same physical structure of an UASB reactor, however with minifilters inside containing two types of support material: expanded clay and gravel. Two hydraulic retention times (HRT) of 24h and 18h were evaluated at steady-state conditions, resulting in organic loading rates (OLR) of 0.032 and 0.018 kgDBO 5 m -3 d -1 and biological organic loading rates (BOLR) of 0,0015 and 0.001 kgDBO 5 kgSVT -1 d -1 , respectively. The decrease in concentration of organic matter in the influent resulted an endogenous state of the biomass in the reactor. The expanded clay was the best support material for biofilm attachment.