Organic Loading
Mostrando 25-36 de 78 artigos, teses e dissertações.
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25. DigestÃo anaerÃbica de Ãgua residuÃria de fecularia em reatores de leito fixo utilizando meio suporte de anÃis de bambu e PVC. / Anaerobic digestion of wastewater from starch in the fixed bed reactor using support medium of bamboo and polyrethane rings
O efluente lÃquido das fecularias causa sÃrios danos ao meio ambiente quando lanÃado sem tratamento, devido Ãs elevadas cargas orgÃnicas e à presenÃa de cianeto e Ãcido cianÃdrico, que interferem na cadeia respiratÃria dos seres vivos. Uma das alternativas de tratamento para esse resÃduo à a implantaÃÃo de reatores anaerÃbios, que podem permit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/07/2011
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26. Produção de biogás a partir de glicerol oriundo de biodiesel / Biogas production from glycerol generated on biodiesel industry
The Brazilian legislation demands the use of biodiesel mixed with diesel in an increasing rate. This raise on biodiesel production implies also on an increase on generation of glycerol, which is a liquid or semi-solid waste with high concentration of salts (approximately 46.1 g\ CL POT.-\ /L) and organic matter (1260 gCOD/L in average). Despite being widely
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2011
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27. Nanoparticle assisted coagulation of aqueous alumina suspensions
Colloidal processing of ceramics offers a high potential to achieve homogeneous microstructures with improved material properties. In this study, a novel forming method is investigated, which was already applied successfully for the fabrication of ceramic matrix composites (CMC), but is also considered to be a suitable direct casting technique for the fabric
Materials Research. Publicado em: 29/11/2011
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28. Start-up and steady-state conditions of an Anaerobic Hybrid Reactor (AHR) using mini-filters composed with two types of support medium operating under low loading rates
The present work aimed at studying the operational parameters of an Anaerobic Hybrid Reactor (AHR) removing organic matter of coffee wastewater with low concentration. The AHR was built similar to an UASB reactor, however the interior was filled with mini-filters composed by two types of support materials: expanded clay and rolled pebble. Three start-ups wer
Brazilian Archives of Biology and Technology. Publicado em: 2011-10
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29. Effect of hydraulic retention time on up-flow anaerobic stage reactor performance at constant loading in the presence of antibiotic tylosin
The present investigation was aimed at determining the impact of the macrolide antibiotic Tylosin in reduced HRT at constant organic loading rate (OLR) by varying feed substrate concentration in an up-flow anaerobic stage reactor (UASR). The antibiotic concentration was maintained at 200 mg.L-1, at constant OLR of 1.88 kg COD.m-3.d-1, by varying feed substra
Brazilian Journal of Chemical Engineering. Publicado em: 2011-03
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30. Ethyl oleate production by means of pervaporation-assisted esterification using heterogeneous catalysis
Pervaporation-assisted esterification of oleic acid and ethanol was investigated by means of heterogeneous acid catalysis with the aim of increasing the ethyl oleate yield. The experimental strategy comprised kinetic tests with Amberlyst 15 Wet (Rohm & Haas), the characterization of hydrophilic Pervap 1000 membrane (Sulzer) and the evaluation of the membrane
Brazilian Journal of Chemical Engineering. Publicado em: 2010-12
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31. Revisiting the influence of loading on organic material removal in primary facultative ponds
This paper investigated the influence of organic loading on BOD and COD removal in primary facultative ponds. The study was based on six full-scale pond plants in which average removals of unfiltered biochemical oxygen demand (BOD) and chemical oxygen demand (COD) were 72 and 50%, respectively. For filtered samples, the removals were 89 and 83%, respectively
Brazilian Journal of Chemical Engineering. Publicado em: 2010-03
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32. Soluble microbial product (SMP) characterization in bench-scale aerobic and anaerobic CSTRs under different operational conditions
This work presents results on the production and characterization (by both mass spectrometry and conventional chemical analyses) of Soluble Microbial Products (SMP) that accumulated in aerobic and anaerobic bench scale completely stirred tank reactors (CSTRs) fed with glucose or acetate under different hydraulic retention times (HRT) and temperatures. SMP ac
Brazilian Journal of Chemical Engineering. Publicado em: 2010-03
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33. Transformações na matéria orgânica nos sedimentos e águas eutrofizados da Represa Ibirité (Ibirité-Sarzedo, MG) tratados com nitrato de cálcio em microcosmos
Due to the growing concern with the environment and the welfare of future generations the search for the restoration of degraded areas and the reestablishment of equilibrium between the anthropogenic and natural environments are nowadays highlighted. The Ibirité Reservoir (Ibirité-Sarzedo, MG) is an example of water body impacted by the disorganized urbani
Publicado em: 2010
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34. Partially aerated attached biomass bed reactor applied to treatment sanitary sewage treatment / Reator com leito de biomassa aderida aerado parcialmente aplicado ao tratamento de esgoto sanitário
This work aimed to evaluate the performance of a full scale up-flow attached biomass bed reactor (159 M POT.3) and with continuous aeration at 7 m above bottom of the reactor to sanitary sewage treatment. The bed of the reactor was constituted for activated granular carbon, anthracite carbon and sand. The work was divided into two stages. In the first stage,
Publicado em: 2010
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35. Experimental and theoretical investigation of anaerobic fluidized bed biofilm reactors
This work presents an experimental and theoretical investigation of anaerobic fluidized bed reactors (AFBRs). The bioreactors are modeled as dynamic three-phase systems. Biochemical transformations are assumed to occur only in the fluidized bed zone. The biofilm process model is coupled to the system hydrodynamic model through the biofilm detachment rate; wh
Brazilian Journal of Chemical Engineering. Publicado em: 2009-09
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36. Estudo da dispersão de pigmentos orgânicos em resina de polipropileno para aplicação em fibras e filamentos / Study of dispersion of organic pigments in polypropylene resin for fiber and filaments applications
Polypropylene has become widely used in fiber and filament applications; most part of these applications use colorful pigments to satisfy aesthetic necessities, communication, identification and others. To achieve the effect of the needed color it is necessary that the pigment has been well dispersed and distribute in the polymer. The appropriate dispersion
Publicado em: 2009