8 research outputs found
Removal of nitrogen, phosphorus, copper and zinc from swine breeding waste water by bermudagrass and cattail in constructed wetland systems
Desenvolvimento vegetativo de plantas e qualidade fisiológica de sementes de arroz produzidas em åreas de recuperação de pastagem
Preparation and characterization of a chitosan film with grape seed extract-carvacrol microcapsules and its effect on the shelf-life of refrigerated Salmon (Salmo salar)
Chitosan films with grape seed extract and carvacrol microcapsules (CMF) were prepared and their physico-chemical properties and effect on physico-chemical and microbiological parameters in refrigerated salmon were tested. CMF showed higher values of thickness (0.41 ± 0.04 mm), moisture content (13 ± 1 g water/100 g film), a (11 ± 3), b (12 ± 3), opacity (20 ± 1%), water vapor permeability (WVP) (4.4 ± 0.4) Ă 10â10 gPaâ1sâ1mâ1, oxygen permeability (O2P) (1.3 ± 0.3) Ă 10â12 gPaâ1sâ1mâ1 and carbon dioxide permeability (CO2P) (1.3 ± 0.3) Ă 10â12 gPaâ1sâ1mâ1 as compared to those of the chitosan control film (CCF). CMF showed lower values of L (66 ± 5) and water solubility (17 ± 1%). The salmon packed into CMF presented on the 7th day of storage a lower value of TVB-N (37 ± 4 mg N/100 g fish) as compared to the CCF (42 ± 3 mg N/100 g fish) and control samples (CS; 66 ± 7 mg N/100 g fish). The CMF showed lower values of pH and lightness after 7 days of storage as compared to CS and CCF. The CMF showed also lower values of mesophilic and psychrophilic bacteria and Pseudomonas spp, reaching the maximum limit allowed for the first two only on the 7th day of storage. CMF increases the shelf-life of refrigerated salmon to 4â7 days of storage due to the antimicrobial effect of the natural agents.SFRH/BPD/70036/2010info:eu-repo/semantics/publishedVersio
AnĂĄlise energĂ©tica em sistema de produção de suĂnos com aproveitamento dos desejos como biofertilizante em pastagem Energy analysis in a swine production system with use of manure as biofertilizer in pasture
O objetivo deste trabalho foi estimar a quantidade de energia para a produção de suĂnos, em ciclo completo, e o balanço energĂ©tico do sistema com reaproveitamento dos resĂduos gerados como biofertilizante, em ĂĄrea de pastagem, utilizando dados mĂ©dios de cinco ciclos, em granja comercial no municĂpio de Diamantina - MG. Quantificou-se o coeficiente energĂ©tico de cada componente envolvido no processo produtivo de suĂnos terminados, tratamento dos resĂduos e produção de pastagem de Brachiaria decumbens, nas formas de ração, trabalho humano, energia elĂ©trica, mĂĄquinas e equipamentos, combustĂveis e lubrificantes, instalaçÔes, produção de suĂnos vivos e produção de Brachiaria decumbens. A quantidade mĂ©dia de energia para produzir 1 kg de suĂno vivo foi de 53,35 MJ. De toda energia empregada no sistema, 76,03% (1.067.106,07 MJ) referem-se Ă s entradas e 23,97% (331.400 MJ) Ă s saĂdas, resultando em coeficiente de eficiĂȘncia energĂ©tica de 0,31. A energia transformada em suĂnos para abate correspondeu a 55,58% (184.200 MJ) das saĂdas, ao passo que a pastagem de Brachiaria decumbens assumiu o valor de 44,42% (147.200 MJ).<br>This work objective was to esteem the amount of energy employed in a complete cycle swine production and the energy balance of the system with utilization of the generated manure as biofertilizer in pasture area, by using five cycles' average data, in a commercial farm in Diamantina municipal district - MG Brazil. The energy coefficient of each involved component was quantified in the productive process of finished swine, residues treatment and Brachiaria decumbens pasture production, in the form of ration, human labor, electric power, machines and equipments, fuel and lubricants, buildings, finished swine production and Brachiaria decumbens production. The average quantity of energy to produce 1 kg of alive swine was of 53.35 MJ. Of total employed energy in the system 76.03% (1,067,106.07 MJ) refers to the inputs and 23.97% (331,400 MJ) refers to the outputs, resulting in an energy efficiency coefficient of 0.31. The energy converted in swine for abate corresponded to 55.58% (184,200 MJ) of the outputs, while the pasture of Brachiaria decumbens reached a value of 44.42% (147,200 MJ)