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| Registros recuperados: 59 | |
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| Báez Pérez, José Luis. |
| Se realizaron tres experimentos en biorreactores acoplados a trampas de gas para evaluar el efecto de Saccharomyces cerevisiae y fumarato de sodio en la fermentación in vitro de alfalfa. En el primero se evaluó la fermentación de alfalfa en medio de cultivo glucosa, celobiosa, almidón y fluido ruminal (GCAFR) usando trampas de gas con agua, solución salina ácida y solución de NaOH. Se midió producción de biogás, CH4, CO2, pH y bacterias totales (BT). El diseño experimental fue completamente al zar con arreglo factorial 2 x 3, y tres repeticiones por tratamiento. En el segundo experimento se evaluó el efecto de Yea sacc®, Procreatin 7® y Diamond V XP® en la fermentación in vitro de alfalfa. Se midió producción de CH4, ácidos grasos volátiles (AGV),... |
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Palavras-chave: Fermentación ruminal; Biogás; CH4; Saccharomyces cerevisiae; Fumarato de sodio; Rumen fermentation; Biogas; Sodium fumarate; Ganadería; Doctorado. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/85 |
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| Báez Pérez, José Luis. |
| Se realizaron tres experimentos en biorreactores acoplados a trampas de gas para evaluar el efecto de Saccharomyces cerevisiae y fumarato de sodio en la fermentación in vitro de alfalfa. En el primero se evaluó la fermentación de alfalfa en medio de cultivo glucosa, celobiosa, almidón y fluido ruminal (GCAFR) usando trampas de gas con agua, solución salina ácida y solución de NaOH. Se midió producción de biogás, CH4, CO2, pH y bacterias totales (BT). El diseño experimental fue completamente al zar con arreglo factorial 2 x 3, y tres repeticiones por tratamiento. En el segundo experimento se evaluó el efecto de Yea sacc®, Procreatin 7® y Diamond V XP® en la fermentación in vitro de alfalfa. Se midió producción de CH4, ácidos grasos volátiles (AGV),... |
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Palavras-chave: Fermentación ruminal; Biogás; CH4; Saccharomyces cerevisiae; Fumarato de sodio; Rumen fermentation; Biogas; Sodium fumarate; Ganadería; Doctorado. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/85 |
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| Ramírez Hernández, Irma Fabiola. |
| Las emisiones de metano (CH4) de las actividades ganaderas, como un gas de efecto invernadero, son estimadas para el desarrollo de inventarios. Sin embargo el aprovechamiento de la producción del CH4 a partir de excretas de animales rumiantes y no rumiantes, para la generación de energía, requiere de establecer condiciones de temperatura y humedad para eficientar la mayor producción de este gas, compuesto del biogás producido por la actividad microbiana. En este estudio, se desarrollaron cuatro experimentos para cuantificar la producción de CH4, con la fermentación controlada, en un sistema biorreactor-trampa. En el 1er experimento, se compararon diferentes excretas de animales rumiantes: estiércol de ganado lechero y en engorda, excretas de cabras y... |
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Palavras-chave: Biogás; Metano; Excretas; Rumiantes; Fermentación; Biogas; Metane; Manure; Ruminants; Fermentation; Doctorado; Hidrociencias. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/282 |
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| Miranda,Adélia P.; Lucas Junior,Jorge de; Thomaz,Maria C.; Pereira,Gener T.; Fukayama,Ellen H.. |
| The objective of this study was to evaluate the quality and the production of biogas and biofertilizer obtained from biodigester supplied with pig feces in the initial, growing and finishing stages, fed with diets formulated based on corn or sorghum. Twenty bench biodigesters were used with hydraulic retention time of 30 days and daily loads that contained 4 to 6% of total solids (TS) and 3.6 to 5.2% of volatile solids (VS). In the effluent of the biodigesters, mean levels of TS were observed ranging between 1.6 and 2.0% and of VS between 1.2 and 1.6%. The mean reductions of TS were 57.7 to 64.7% and of VS from 61.7 to 69.0%, and there was only difference in the finishing phase, in which the major averages reductions were produced by the biodigesters... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodigesters; Biogas; Pig feces; Environmental impact. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100006 |
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| Oliva-Merencio,Deny; Pereda-Reyes,Ileana; Schimpf,Ulrike; Koehler,Stefan; Silva,Ariovaldo J. da. |
| ABSTRACT This paper studied the effect of adding an enzyme (ellulose) on anaerobic digestion of maize silage. We compared materials at chopping lengths of 8 mm (MSL), 4mm (MSS) and natural size (Ms) under a mesophilic and discontinuous operation (batch process). Hence, we found the process to be significantly influenced by particle size. Moreover, the ellulose addition did not significantly impact biogas production after a 35-day digestion period. Ms and MSS displayed an improved response to all variables when compared with MSL and MSL+C, with significant differences. Studies on the refractory fraction at infinite time (R0) have demonstrated that the lowest values correspond to Ms and MSS (0.122 and 0.155, respectively). The Kinetic approach and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ellulose; Silage; Biogas; Kinetics; Biodegradability. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000500951 |
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| Konrad,Odorico; Koch,Fabio F.; Lumi,Marluce; Tonetto,Jaqueline F.; Bezama,Alberto. |
| In this study, was studied the biogas generation from swine manure, using residual glycerine supplementation. The biogas production by digestion occurred in the anaerobic batch system under mesophilic conditions (35°C), with a hydraulic retention time of 48 days. The experiment was performed with 48 samples divided into four groups, from these, one was kept as a control (without glycerin) and the other three groups were respectively supplemented with residual glycerine in the percentage of 3%, 6% and 9% of the total volume of the samples. The volume of biogas was controlled by an automated system for reading in laboratory scale and the quality of the biogas (CH4) measured from a specific sensor. The results showed that the residual glycerine has high... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogas; Residual glycerin; Swine manure; Renewable energy. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500004 |
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| Paes,Juliana L.; Alves,Thaís B. S.; Silva,Leonardo D. B. da; Marques,Anieli de S.; Dias,Valentina R. S.. |
| ABSTRACT One way of making livestock farming a more sustainable practice is to raise cattle organically. However, regardless of the production system, there is a generation of residues that can be converted into energy resources using biodigesters. This study aimed to evaluate the addition of inoculum in the anaerobic biodigestion of cattle manure under organic (OPS) and conventional production systems (CPS) in an Indian model biodigester. The physicochemical (pH, EC, TS, VS, DBO, and COD) and microbiological characteristics of the affluent and effluent, as well as the production, potential, and qualitative characteristics of the biogas, were evaluated. CPS showed higher reductions in TS, VS, BOD, and COD than OPS, with the highest effect of biogas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anaerobic biodigestion; Biogas; Starting point; Biofertilizer potential. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200146 |
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| Vicente Jr.,Donizete J.; Costa,Monica S. S. de M.; Costa,Luiz A. M.; Pereira,Dercio C.; Santos,Francielly T. dos. |
| ABSTRACT Considering the constant increase in the waste generation from poultry and pigs’ husbandries, the main contributions of this study were to verify the potential of biogas production through the anaerobic digestion and co-digestion of the residues generated by these two activities, as well as to highlight the recovery of the nutrients contained in the obtained digestate. The wastes used were poultry litters after six, seven and eight production lots, as well as the sifted wastewater from one Piglets Producer Unit (PPU). Higher biogas production (p <0.05) was observed in the treatments in which anaerobic codigestion was used with the swine wastewater (SW): 0.179; 0.158 and 0.117 m3 per kg of total solids (TS) added for poultry litters with six,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agroindustry; Digestate; Biogas; Waste treatments. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600961 |
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| Kuczman,Osvaldo; Tavares,Maria H. F.; Gomes,Simone D.; Guedes,Luciana P. C.; Grisotti,Geovane. |
| The cassava starch industries generate a large volume of wastewater effluent that, stabilized in ponds, wastes its biogas energy and pollutes the atmosphere. To contribute with the reversion of this reality, this manipueira treatment research was developed in one phase anaerobic horizontal pilot reactor with support medium in bamboo pieces. The reactor was excavated into the ground and sealed with geomembrane in HDPE, having a volume equal to 33.6 m³ and continuous feeding by gravity. The stability indicators were pH, volatile acidity/total alkalinity ratio and biogas production. The statistical analyses were performed by a completely randomized design, with answers submitted to multivariate analysis. The organical loads in COD were 0.556; 0.670; 0.678 and... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Biodigester; Biogas; Anaerobic digestion; Cassava; Cassava wastewater. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600021 |
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| Araujo,Izabela R. C.; Gomes,Simone D.; Tonello,Tamiris U.; Lucas,Shaiane Dal'Maso; Mari,Angelo G.; Vargas,Rodrigo J. de. |
| ABSTRACT The aim of this study was to evaluate the behavior of an anaerobic reactor of packed-bed and continuous flow, in relation to the biogas and methane production and the removal of organic load, from the wastewater of cassava starch extraction. For this purpose, were tested, in a reactor with a useful volume of 2.82 L and support mean of polypropylene filled with polyethylene foam, the organic loading rate (OLR) of 2.5, 5.0, 8.0 and 10.0 g L-1d-1. It was evaluated the removal of COD, the pH, the VA/TA ratio, the biogas and the methane production. It was concluded from this study that it is possible to produce biogas with methane percentages higher than 80% (maximum) and remove the organic load more than 90% under the tested conditions. In relation to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Methanogenic reactor; Anaerobic biodigestion; Biogas. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000200270 |
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| Santos,Tânia M. B. dos; Trevizan,Paula S. F.; Xavier,Cristiane A. N.; Kiefer,Charles; Ferraz,André L. J.. |
| ABSTRACT This study aimed to evaluate the efficiency of anaerobic digestion and biogas production by manure from pig supplemented with ractopamine over different periods. We used manure of 50 finishing pigs according to the following diets: without supplementation and supplemented with 20-ppm ractopamine during 7, 14, 21, 28 and 35 days pre-slaughter. Continuous bench biodigesters were used in the experiment. We measured biogas production and made analyses of total (TS) and volatile solids (VS), pH, total phosphorus (total P), total nitrogen (total N) and ammoniacal nitrogen (ammoniacal N) in samples of manure, affluent and effluent from biodigesters. The pH and ammoniacal N as indicator parameters of the process balance and stability were satisfactory.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Β-adrenergic; Biogas; Ractopamine hydrochloride; Environmental impact and nutrient partitioning. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000300399 |
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| Hirano,Marcio Y.; Silva,Celso L. da. |
| ABSTRACT The increase in confined cattle breeding reflects the modernization and automation of farming, which has significantly intensified in recent years and caused an increase in the energy demand of rural properties. This study investigated the use of biogas generated from dairy cattle manure confined in gas microturbines on a farm to generate electricity and the energy use of exhaust gases. At the end of the study, 6,195 to 16,077 kWh month-1 of electricity was obtained, which corresponds to 43.3% of the property's self-sufficiency energy demand. By performing an exhaust gas energy exploitation, between 6.8 and 13.6 m3 day-1 of water heated to 368 K can be produced, or between 11,880 and 23,661 kWh month-1 of cooling capacity can be obtained using a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy exploitation; Biogas; Dairy cattle; Microturbine. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400526 |
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| Sousa,Izabelle de P.; Rosa,André P.; Borges,Alisson C.; Renato,Natália dos S.. |
| ABSTRACT Pig farming stands out as an alternative for decentralized electrical energy production from the use of biogas energy. However, its use is still limited. Thus, this study aimed to estimate and map the biogas production, as well as determine the electric power originated by the use of biogas produced in covered lagoon biodigester from pig farms of different sizes in the state of Minas Gerais, Brazil. The research was based on data provided by the Instituto Mineiro de Agropecuária (IMA). Three forms of electric power were estimated, as follows: (i) total, (ii) current, and (iii) installed. They were estimated from the volume of manure generated at each development stage of the animals. The total electric power corresponded to 31 MW, while the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anaerobic digestion; Covered lagoon biodigester; Energy recovery; Biogas; Pig farming. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300396 |
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| Larsen,Andrea C.; Gomes,Benedito M.; Gomes,Simone D.; Zenatti,Dilcemara C.; Torres,Douglas G. B.. |
| The Brazil's Biodiesel Production and Use Program introduces biodiesel in the Brazilian energy matrix, bringing along the perspective of a growth of the glycerin offer, co-product generated in the proportion of 10 kg for each 100 L of biodiesel. The aim of this study was to evaluate the addition of crude glycerin in the anaerobic digestion of cassava starch industry effluent (cassava wastewater), in a horizontal semi-continuous flow reactor of one phase in laboratory scale. It was used a reactor with a 8.77 L of useful volume, a medium support for corrugated conduit of polyvinyl chloride (PVC), temperature of 261 ºC, fed with cassava wastewater and glycerin, with hydraulic detention times of 4 and 5 days and increasing volumetric organic load of 3.05;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cassava wastewater; Biodiesel; Biogas; Glycerol. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200013 |
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| Registros recuperados: 59 | |
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