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| Lopes,Carla L.; Mees,Juliana B. R.; Sene,Luciane; Carvalho,Karina Q. de; Christ,Divair; Gomes,Simone D.. |
| This study aimed to evaluate the influence of airflow (0.25, 0.50 and 0.75 L.L-1.min-1) and cycle time (10.45 h, 14.25 h and 17.35 h) on a sequencing batch reactor (SBR) performance in promoting nitrification and denitrification of poultry slaughterhouse wastewater. The operational stages included feeding, aerobic and anoxic reactions, sedimentation and discharge. SBR was operated in a laboratory scale with a working volume of 4 L, keeping 25% of biomass retained inside the reactor as inoculum for the next batch. In the anoxic stage, C: N ratio was maintained between 5 and 6 by adding cassava starch wastewater. A factorial design (22) with five repetitions was designed at the central point to evaluate the influence of cycle time and airflow on total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrification; Denitrification; Response surface methodology; Fluorescent in situ hybridization. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300567 |
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| Mees,Juliana B. R.; Gomes,Simone D.; Boas,Márcio A. Vilas; Fazolo,Ajadir; Sampaio,Sílvio C.. |
| The objective of this research was to evaluate the performance of the aquatic macrophyte Eichhornia crassipes applied in situ in a slaughter house treatment system, located in the west of the Paraná state, Brazil, regarding the nutrients removal and organic matter. Moreover, it aimed to obtain data from the production, management and composting practices of the biomass generated in the system. During 11 months of macrophytes development, physic and chemical parameters were monitored and plant density was controlled by periodical removal of excess biomass, which was weekly monitored and it is expressed in kg of aquatic plant per m² covered area. The degradation of the macrophytes removed from the treatment system was evaluated at the pilot scale in eight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agroindustrial effluent; Nutrient removal; Water hyacinth; Composting; C:N ratio. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162009000300013 |
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| Kreutz,Cristiane; Passig,Fernando H.; Carvalho,Karina Q. de; Mees,Juliana B. R.; Gomes,Simone D.. |
| This paper sought to evaluate the behavior of an upflow Anaerobic-Aerobic Fixed Bed Reactor (AAFBR) in the treatment of cattle slaughterhouse effluent and determine apparent kinetic constants of the organic matter removal. The AAFBR was operated with no recirculation (Phase I) and with 50% of effluent recirculation (Phase II), with θ of 11h and 8h. In terms of pH, bicarbonate alkalinity and volatile acids, the results indicated the reactor ability to maintain favorable conditions for the biological processes involved in the organic matter removal in both operational phases. The average removal efficiencies of organic matter along the reactor height, expressed in terms of raw COD, were 49% and 68% in Phase I and 54% and 86% in Phase II for θ of 11h and 8h,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Kinetic; Cattle slaughterhouse; Combined treatment system. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000200015 |
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| Mees,Juliana B. R.; Gomes,Simone D.; Vilas Boas,Márcio A.; Gomes,Benedito M.; Passig,Fernando H.. |
| A sequential batch reactor with suspended biomass and useful volume of 5 L was used in the removal of nutrients and organic matter in workbench scale under optimal conditions obtained by central composite rotational design (CCRD), with cycle time (CT) of 16 h (10.15 h, aerobic phase, and 4.35 h, anoxic phase) and carbon: nitrogen ratio (COD/NO2--N+NO3--N) equal to 6. Complete cycles (20), nitrification followed by denitrification, were evaluated to investigate the kinetic behavior of degradation of organic (COD) and nitrogenated (NH4+-N, NO2--N and NO3--N) matter present in the effluent from a bird slaughterhouse and industrial processing facility, as well as to evaluate the stability of the reactor using Shewhart control charts of individual measures. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrifying activity; Kinetic constants; Nutrient removal; Quality control; Processing capacity. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000500013 |
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