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- 저자 : Ileana Pereda-Reyes (검색결과 2 건)
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Tania Perez-Perez,Arletty Funcada-Martinez,Ania Cabrera-Diaz,Luis E. Guerra-Diaz,Deny Oliva-Merencio,Zhenia Milan,Ileana Pereda-Reyes 대한환경공학회 2022 Environmental Engineering Research Vol.27 No.5
Large pig farms generate enormous volumes of wastewater without proper treatment before discharge. High-rate anaerobic reactors as the expanded granular sludge bed (EGSB) are rarely reported for that purpose. In this study, an EGSB reactor with Cuban natural zeolite addition was evaluated for treating piggery wastewaters at lab scale. This study was conducted at different organic loading rate (OLR) ranging from 0.32 to 6.13 gCOD/Ld with a constant hydraulic retention time (HRT) of 12 h. The evolution of several control and operational parameters as the soluble chemical oxygen demand (COD) demonstrated a proper bioreactor performance to treat piggery wastewater. The results showed that the addition of natural zeolite at 40 gzeo/Lreactor in EGSB reactor results in COD efficiencies over 70%, despite of the fluctuations of fed wastewater characteristics. The kinetic study demonstrates that, the modified Stover-Kincannon model was found to be appropriate for EGSB reactor. The effluent soluble COD was predicted with high determination coefficient. The maximum removal rate constant (Umax) and saturation value constant (KB) were reported for a first time for the EGSB reactor with values of 10.2 and 11.8 gCOD/Ld, respectively. Methane yield for both, batch and continues experiments, were in the range from 214.5 to 299.8 mLCH4/gCOD.
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Santiago Maldonado-Saeteros,Ricardo J. Baquerizo-Crespo,Yunet Gomez-Salcedo,Osney Perez-Ones,Ileana Pereda-Reyes 대한환경공학회 2023 Environmental Engineering Research Vol.28 No.2
Anaerobic digestion (AD) is a biological treatment susceptible to temperature variations. The Arrhenius model and the Van´t Hoff-Arrhenius relationship analyze the temperature effect in AD first-order kinetic constant (k). Kinetic data is relevant for estimating the hydraulic retention time (HRT) in continuous reactors. This research aimed to evaluate the behavior of kinetic constants concerning temperature using the Arrhenius model and Van´t Hoff-Arrhenius relationship and analyze the influence of kinetic constants as estimators of the HRT. The evaluation of the temperature effect in AD analyzed k fit to the Arrhenius model and Van’t Hoff-Arrhenius relationship. The research used data of AD methane yield (B₀) kinetics from the literature, corresponding to macroalgae (MA) (25, 35, 45℃), swine manure (SM) (25, 30, 35℃), and co-digestion of chicken manure with sawdust and miscanthus (CM) (35, 40, 42℃). The Arrhenius model and Van´t Hoff-Arrhenius relationship fitted the data with reduced temperature intervals (ΔT = 5℃). The HRT analysis used a mass balance model considering 80% of the maximum B0 compared with the technical digestion time at 80 (T<SUB>80</SUB>) and 90% (T<SUB>90</SUB>) of the maximum B₀. The results indicate that the HRT calculation is sensitive for k below 0.13 d<SUP>-1</SUP>.
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