Greenhouse gas emissions and N2o mitigation in beef cattle production on tropical pasture

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

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.

Fibra da cana-de-açúcar para suínos pesados em restrição alimentar qualitativa

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

Soil greenhouse gas emissions and their relations to soil attributes in a sugarcane area

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

Milho, amido ou caroço de algodão associados à glicerina bruta em dietas para ovinos

Pós-graduação em Zootecnia - FCAV

Fertilizantes e sistemas de irrigação: emissões de gases de efeito estufa no cultivo do milho

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Coprodutos do biodiesel na alimentação de cordeiros

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Energy sources in the supplementation of beef cattle grazing Brachiaria brizantha cv. Xaraés

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

Produção e emissão de gases de efeito estufa de bovinos alimentados com teores de concentrado

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Grão de soja moído e níveis de amido na terminação de tourinhos Nelore confinados

Pós-graduação em Zootecnia - FCAV

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.

Termometria em chamas utilizando a técnica de espalhamento Rayleigh

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Procedimento para homologação de sistemas ecoeficientes para obtenção de créditos de carbono

This paper deals with the homologation process for obtaining carbon credits through the Clean Development Mechanism (CDM), that regulates the greenhouse gases reductions under the rules of the Kyoto Protocol. The CDM evaluates projects through a project cycle, which begins with the preparation of the Project Design Document (PDD) until the project certification to receive Certified Emission Reductions (CERs), popularly known as carbon credits. This study analyzed the implementation of the system Burner Recorder System for Low Flows of Biogas (QRBBV), developed by Marcelino Junior & Godoy (2009), in an eco-friendly wastewater treatment mini-plant (miniEETERA), built at the site of UNESP - Guaratinguetá SP. The QRBBV system is low cost and high reliability, developed to burn the methane generated at sites of low and variable production of biogas, which is not economically justified their energy recovery. Currently, almost all wastewater generated at the site of the campus is being treated by miniEETERA and, as a result, the biogas originated by this activity is being released into the atmosphere. Therefore, the project activity aims to capture and burn the biogas generated by miniEETERA, reducing the negative effects caused by the methane emissions into the atmosphere and, thus, claim to receive carbon credits. This work aimed to demonstrate the project applicability under CDM through the study and preparation of the PDD, as well as an analysis of the entire project cycle required for homologation. The result of the work obtained an estimate of only 20 CERs per year and proved to be economically unviable for approval through the CDM, since the spending with the approval process would not be compensated with the sale of CERs, mainly due the low carbon price in the world market. From an environmental standpoint, the project is perfectly... (Complete abstract click electronic access below)