Análise da viabilidade da reciclagem de dejetos de bovinos com tratamento biológico, em sistema intensivo de produção de leite

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Biodigestão anaeróbia dos dejetos de suínos e bovinos e utilização do biofertilizante no capim-piatã

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Riscos potenciais de impacto ambiental negativo da suinocultura na bacia do córrego Bebedouro, Uberlândia-MG

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caldo de cana-de-açúcar na biodigestão anaeróbia com dejetos de vacas em lactação sob diferentes dietas

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Características fermentativas e econômicas da produção de biogás utilizando dejetos de cabras leiteiras

Pós-graduação em Zootecnia - FCAV

Produção e qualidade do biogás gerado com os dejetos de diferentes espécies animais

Pós-graduação em Zootecnia - FCAV

Resistência antimicrobiana e prevalência de sorovares de salmonella spp. isolados de fezes e linfonodos de suinos

Pós-graduação em Medicina Veterinária - FMVZ

Co-digestão dos dejetos de suínos e óleo vegetal de descarte: adição de microrganismos e lipases comercias

Pós-graduação em Zootecnia - FCAV

Análise da viabilidade do uso de biogás gerado a partir de dejetos bovinos em microturbinas para fins de geração, cogeração e trigeração de energia

The use of digesters has become an important alternative for the proper disposal of organic agricultural wastes, serving as a solution to some environmental and health problems. Furthermore, the process of digestion provides commercially valuable by products such as biogas and bio fertilizer. The generation of biogas from agricultural waste, and its use in power generation systems has aroused great interest in rural areas because it enables supply in whole or in large part the energy demand of ownership by reducing production costs. The advent of technology has brought new forms of energy conversion of biogas, as the use of micro turbines specifies to be fuelled with biogas derived from the decomposition of organic matter in digesters, since it has a low level of methane in its composition, and high degree of impurities such as hydrogen sulphide, which are harmful to equipment and reduce the calorific value of biogas. The use of micro turbines behind other advantages like low emissions, great fuel flexibility and low maintenance. This paper presents an analysis of the feasibility of using biogas generated from cattle manure in micro turbines to generate electricity. Behind also an assessment of the energy potential that each animal has on various uses of biogas, and forms of energy recovery from the exhaust gases of the micro turbine. Also conducts an evaluation of the energy savings that the use of biogas aggregates properties.

Desempenho e características dos dejetos produzidos por cabritos em diferentes idades e alimentados com diferentes proporções entre volumoso e concentrado

This study was conducted to evaluate the performance and characteristics of manure produced by Saanen goats with 90, 120 and 150 days of age and fed three diets, diets 1 = 80 % roughage (R) and 20 % concentrate (C), diets 2 = 60 % R and 40 % C, diets 3 = 40 % R and 60 % C. Were evaluated 24 goats (divided into three groups according to diet ) during the fattening stage, making up the collection of waste at 90, 120 and 150 days of age to quantify the mass of manure produced each day, beyond the content of N, P, K, Ca, Mg, Na, Fe, Cu, Zn and Mn. The animals were weighed weekly and during the collection of waste is evaluated the digestibility of DM, CP and NDF, in addition to the estimate of feed conversion and rate of waste. The best results of feed conversion coefficient of waste and the apparent digestibilities of DM, CP and NDF occurred at the age of 150 days and in animals fed diets containing higher proportions of concentrate. Insofar as the increased age of the animal and level of concentrate in the diets were verified higher production of faeces. All nutrients were also affected, with higher concentrations occurred in the feces of animals at 150 days old and fed with diet 40% R and 60% C.

Inclusão de cana-de-açúcar triturada em biodigestores abastecidos com dejetos de bovinos de corte confinado

The objective of this study was toevaluatethe effect of the co-digestion of triturated sugarcane with beef cattlerfeddlotmanure in continuous digestorsin the amount and quality of biogas and biofertilizer. To do so, the work was divided in three steps. The first and the second part lasted30 days each and evaluated the effect of the additionof 7% of triturated sugarcane in agreement with the followingtreatments:treatment, the digestors were supplied with a mixture of 0,250 kg of manure and 1,750 kg of water ;treatment 2, the digestors were supplied with a mixture of 0,250 kg of manure, 1,610 kg of water, and 0,140 kg of triturated sugarcane. To The third period lasted 30 days and evaluated the effect of adding 3.5% of sugarcane crushed. The data analyses was performed with randomized designusing SAS®program with level of significance of 5%. The digesters with sugarcane produced in the first period respectively 0.79, 0.0127, and 0.102 m3of total production, of biogas production per kilogram of substrate, and of total production per kilogram of manure versus 0.5, 0.0081, and 0.065 m3from the control treatment, respectively..In the thirdperiod,each variable had a total production of 0.76, 0.123, and 0.98 m3and the control treatment yielded 0.51, 0.065, and 0.0082 m3.In the second period,the total production per kilogram of solidand of volatile solids added were higher in the digesters without sugarcane (0.0093 and 0.438 m3) when compared to the digesters that had additionof 7% of cane(0.271 and 0.336 m3).

Co-digestão anaeróbia de dejetos de suínos, níveis de inclusão de óleo de descarte e microrganismos lipolíticos redução do impacto ambiental

The objective of this work for evaluating the potential of biogas and methane productions and still and reductions in levels of total solids (TS), volatile solids (VS) and neutral detergent fiber (NDF) of the co-digestion anaerobic digestion in digesters fed with swine manure plus disposal of oil and lyophilized microorganisms. For assay development substrates were prepared containing 4% TS, consisting of swine manure, disposal oil (the proportions 8, 10 and 12% oil content in relation to the substrate TS), lyophilized microorganisms (Biol-2000 ® - concentrations of 10 g/m3 and 15 g/m3 ), water for dilution of this waste and inoculum for batch digesters supply. There was no significant difference with respect to reductions in TS, VS and NDF constituents, providing very significant reductions in average 54.14; 62.79 and 49.16% respectively. Regarding the potential of biogas production, the highest yields occurred in digesters supplied with 10% oil and 15 g/m3 of Biol®, being 0.43 and 0.54 L of biogas per kg of TS and VS added, respectively, similar results were found when assessed the potential for methane production, with higher values (0.22 and 0.27 L of methane per kg of TS added and VS, respectively) obitidos the same treatment. The inclusion of 15 g/m3 in Biol® substrate composition containing swine manure and 10% of oil improves the yields of biogas and methane.

Anaerobic biodigestion of pigs feces in the initial, growing and finishing stages fed with diets formulated with corn or sorghum

Objetivou-se avaliar a produção e a qualidade do biogás e do biofertilizante obtidos em biodigestores abastecidos com dejetos de suínos, nas fases inicial, crescimento e terminação, alimentados com dietas formuladas à base de milho ou sorgo. Foram utilizados 20 biodigestores de bancada, com tempo de retenção hidráulica de 30 dias, e cargas diárias que continham 4,0 a 6,0% de sólidos totais (ST) e 3,6 a 5,2% de sólidos voláteis (SV). Nos efluentes dos biodigestores, foram verificados teores médios de ST variando de 1,6 a 2,0% e de SV entre 1,2 e 1,6%. As reduções médias de ST foram de 57,7 a 64,7% e de SV de 61,7 a 69,0%, sendo que houve diferença somente na fase de terminação, na qual as maiores reduções médias foram para biodigestores abastecidos com dejetos de animais alimentados com dietas à base de milho. Nos biodigestores abastecidos com dejetos de animais em fase inicial e de crescimento, alimentados com dietas formuladas à base de milho, foram verificadas maiores produções médias de biogás e os maiores potenciais médios de produção de biogás. Os potenciais médios obtidos foram 0,033; 0,181; 0,685; 0,788 e 1,132 m³ por kg de afluente, estrume, ST adicionados, SV adicionados e SV reduzidos, respectivamente. Não foram verificadas diferenças quanto ao teor médio de metano no biogás entre dietas e fases. As concentrações médias dos nutrientes N, P, K, Ca, Mg, Na, Fe, Mn, Zn e Cu no afluente e efluente dos biodigestores variaram entre as dietas e fases.

Redução de Bactérias Indicadoras de Poluição Fecal em Estrume de Aves de Postura Tratados por Biodigestão Anaeróbia

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Haematological and gill responses in parasitized tilapia from valley of Tijucas River, SC, Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)