Biochemical Reactor
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. SONO-OXIDATIVE PRE-TREATMENT OF WASTE ACTIVATED SLUDGE BEFORE ANAEROBIC BIODEGRADATION
Abstract The effects of sonication, potassium ferrate (K2FeO4) oxidation and their simultaneous combination (called "sono-oxidative pre-treatment") on chemical properties and anaerobic digestion of waste activated sludge (WAS) were investigated and compared comprehensively. Based on chemical parameters, the optimum operating conditions were found to be 0.3 g
Braz. J. Chem. Eng.. Publicado em: 2017-01
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2. Enzyme kinetic modelling and analytical solution of nonlinear rate equation in the transformation of D-methionine into L-methionine in batch reactor using the new homotopy perturbation method
A mathematical model of biotransformation of D-methionine into L-methionine in the cascade of the enzymes such as, D-amino acid oxidase (D-AAO), L-phenylalanine dehydrogenase (L-PheDH) and formate dehydrogenase (FDH) is discussed. The model is based on a system of coupled nonlinear reaction equations under non steady-state conditions for biochemical reaction
Quím. Nova. Publicado em: 2016-12
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3. THE "CHEMICAL OXYGEN DEMAND / TOTAL VOLATILE ACIDS" RATIO AS AN ANAEROBIC TREATABILITY INDICATOR FOR LANDFILL LEACHATES
Abstract In some operational circumstances a fast evaluation of landfill leachate anaerobic treatability is necessary, and neither Biochemical Methane Potential nor BOD/COD ratio are fast enough. Looking for a fast indicator, this work evaluated the anaerobic treatability of landfill leachate from São Carlos-SP (Brazil) in a pilot scale Anaerobic Sequence B
Braz. J. Chem. Eng.. Publicado em: 2015-03
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4. AnSBBR with circulation applied to biohydrogen production treating sucrose based wastewater: effects of organic loading, influent concentration and cycle length
An anaerobic sequencing batch biofilm reactor (AnSBBR) containing immobilized biomass and operating with recirculation of the liquid phase (total liquid volume 4.5 L; treated volume per cycle 1.9 L) was used to treat sucrose-based wastewater at 30 ºC and produce biohydrogen. The influence of applied volumetric organic load was studied by varying the influen
Braz. J. Chem. Eng.. Publicado em: 2014-09
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5. Recuperação de enxofre elementar em reatores microaerados / Sulfur recovery in micro-aerobic reactors
The occurrence of biological sulfate reduction results in the formation of unwanted hydrogen sulfide, which can be removal under oxygen-limiting conditions. Detailed knowledge of this process remains unclear and the micro aeration process was prevented by technological limitations. For these reasons, the chemical and biological oxidation of sulfide was studi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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6. 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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7. Estudo do crescimento de Ceriporiopsis subvermispora em culturas submersas para a produção de inóculos destinados ao processo de biopolpação / Studies on the submerged culturing of Ceriporiopsis subvermispora for inocolum production used in biopulping processes
The present work evaluated suitable systems for producing Ceriporiopsis subvermispora mycelium in submerged cultures. Mycellium produced was used in subsequent inoculation of wood chips in biopulping processes. The development of appropriated technologies for producing large amounts of inoculum may be a key step in biopulping, since currently there are no es
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/08/2009
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8. 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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9. Study of the acetic bacteria nutritional necessity for the acid production / Estudo das necessidades nutricionais de bacterias aceticas para a produção de acido acetico
The acetical bacteria are used in vinegar production. The nutritional requirement of acetical bacteria is poorly known, and the maintenance of these microorganisms is too difficult. The reactors of submerged acetical fermentation promote conditions of physiologic stress: acidity (up to 10% p/v), alcohol (2%p/v) and oxygenation (0,4 vvm).These parameters are
Publicado em: 2009
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10. Modelagem matemática da degradação da glicose, com produção de hidrogênio, em um reator anaeróbio de leito fixo / Mathematical modeling of glycose degradation with hydrogen production in a fixed bed anaerobic reactor
Mathematical models bring benefits to the understanding of mechanisms involved on wastewater treatment processes because they provide interpretations and make possible performance predictions, evaluation of design alternatives, optimization of future plants or the improvement to existing systems. Therefore, in this work a mathematical model to describe the g
Publicado em: 2008
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11. HidrÃlise e oxidaÃÃo catalÃtica dos carboidratos do bagaÃo de cana-de-aÃÃcar em operaÃÃes descontÃnuas
In the local context, is clearly meet the need to enhance the sugarcane bagasse as biomass plant. Sugar cane bagasse is a waste coming from alcohol and sugar industries and available abundantly. This availability of sugarcane bagasse as raw material at low cost, combined with the feasibility of its recovery via chemical and biochemical processes, is the foun
Publicado em: 2008
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12. Air desinfection in restricted environments by combining action of titanium and ultraviolet light (TiO2/UV) / Desinfecção do ar em ambientes confinados pela ação combinada de dioxido de titanio e luz ultravioleta (TiO2/UV)
The populational growth and development of new technologies and equipments to improve quality of life can many times contribute to an increase of polluent agents and the proliferation of pathogenic ones. Respiratory-tract diseases in Brazil have been an important cause of concern and hospitable internations. Several biochemical processes are under research a
Publicado em: 2006