990 resultados para Salvage (Waste, etc.)


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v. 1. ano de 1808 a 1811. 1836 -- v. 2. ano de 1812 a 1818 -- v. 3. ano de 1819 a 1822. 1837 -- v. 4 ano de 1823 a 1824. 1838 -- v. 5. ano a 1826. 1838 -- v. 6. ano de 1827 a 1828. 1841 -- v. 7. ano de 1829 a 1831 e índice. 1844.

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In this paper, an AC plasma arc reactorwithworkinggasofhydrogen is applied to destruct chemicalagents. The temperature attains 6000℃ in the arc area and over 2000℃ in the other space of the crucible. The Arsenic (As) contained chemical agent -Adams (DM) used in the experiment, was added into the plasmareactorwith the additives: Fe, CaO, and SiO_2, etc. Pyrolysis and destructionofchemicalagents occurs very quickly in the high-temperature reactor. Gaseous hydrogen was injected into the reactor to form a reductive environment, to reduce the formation of As_2O_3 etc. In the bottom of the crucible, the solid residues of toxicant and additives were melted and formed as vitrified slag. The off-gas was treated by a wet scrubber. The amounts of arsenic distributed in the off-gas, vitrified slag, waste water and solids (soot) were measured. The result shows DM is completely destructed in the plasmareactor. The Arsenic content in the off-gas, vitrified slag, waste water and soot are 0.052 mg/l, 3.0%, 10.44 mg/l, and 5.1% respectively, which will be disposed as the pollutant matters. The results show that the plasma technology is an environmentally friendly technology to destruct chemicals.

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Ponencia leída en el Foro de Comunicaciones IkasArt II (BEC Barakaldo, 2010.06.18)

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Ponencia leída en el Foro de Comunicaciones IkasArt II (BEC Barakaldo, 2010.06.18)

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(PDF contains 5 pages.)

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Voyage au Brésil narra a experiência de observar a vida e os costumes dos habitantes do Brasil e oferece um registro cheio de interesse sociológico e até científico. Segundo Rubens Borba de Moraes, " é obra valiosíssima sobre a Bahia colonial", sendo esta edição mais preciosa que a inglesa de 1805. A obra foi traduzida também para o alemão. Afonso de Taunay resume e comenta o livro de Lindley em Aventuras de Thomas Lindley.

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Analisa a viabilidade, do ponto de vista da constitucionalidade e juridicidade, da promulgação de leis que objetivam atribuir títulos de “capital nacional” a determinadas localidades, tais como “capital nacional da uva, ou “capital nacional da vela”, ou ainda “capital nacional do forró”. A matéria tem relevância devido à quantidade significativa de proposições que com esse objetivo tramitam na Casa.

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Titulo original : travels in brazil : in the years from 1809, to 1815.

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The utilization of waste waters in aquaculture were briefly reviewed. At the National Institute for Freshwater Fisheries Research (NIFFR), stocking density (20 to 160 fish/m super(3)) experiments using Sarotherodon galilaeus (without supplementary feeding) in floating cages were carried out in a sewage pond (0.4ha surface area). Cage culture of S. galilaeus was observed to have potentials in waste waters aquaculture. Recommendations were made on the execution of an intergrated waste water management and utilization.

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The scales and fins of some freshwater fish species (Sarotherodon galilaeus, Oreochromis niloticus, Tilapia zillii, Barbus callipterus, Hemichromis fasciatus) from Kainji Lake, Nigeria were analyzed for their organic and inorganic matter. The aim of such study is to determine the usefulness of these waste parts of the fish in fish feed preparation. In all instances, the inorganic matter was found to be quite high in the fish exoskeleton, and calcium formed the highest element in the scales and the fins. These waste materials are therefore, considered as possible replacement for mineral sources in fish feed and probably the feed for other livestock

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The importance of fish meal production as a means of reducing fish waste currently being experienced in the fisheries subsector is discussed. Cost estimate for Nigeria establishing a fish meal manufacturing plant and suggestions on rational execution of the project are presented. If properly located and well managed, the project will serve to convert fish waste to cash in the industrial fishery

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Waste water from some National Electric Power Authority (NEPA) housing units in Nigeria was fed to a 0.4 ha pond which was stocked with 2,200 Sarotherodon galilaeus fingerlings with a mean weight of about 36.0gm and 1000 Cyprinus carpio fingerlings with a mean weight of 10gm. This yielded after 10 months, over 2300 kg of harvestable fish plus over 20,000 Sarotherodon galilaeus fingerlings. The growth rate of C. carpio was not very encouraging possibly because of the type of plankton that colonised the pond. The S. galilaeus became stunted because of overpopulation as there were no carnivores to control their excessive breeding. The physico-chemical parameters were favourable for the growth of fish food organisms

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Nutrient digestibility and amino acid availability were assessed in sharp-toothed catfish, Clarias gariepinus, fingerlings fed diets containing soyabean flour (SF) - Poultry meat meal (PMM) blends (25:75. 50:50, and 75:25) and 0.5 of 1.0%, Cr sub(2)0 sub(3). There was agreement between the pattern of overall protein digestibility and average amino acid availability despite the variability in individual amino acid availability the best dry matter, lipid and protein digestibility coefficients, and amino acid availability values were obtained with diets containing 0.5% Cr sub(2)0 sub(3). Chromic Oxide inclusion level appeared to affect nutrient availability. Increased marker level resulted into decreased nutrient digestibility coefficients. Similarly, these diets generated lower fecal crude protein than those with 1.0% Cr sub(2)0 sub(3). However, the latter group recorded higher protein retention efficiency. Dry mailer and lipid of diets containing more soyabean flour seemed to be more digestible than those of poultry meat meal. Similar trend was observed for the apparent availability of the amino acids. This investigation has indicated that low level of marker was better in digestibility study. Utilization of more SF than PMM in the diets of this catfish was more beneficial and should be encouraged in the feed industries producing catfish diets towards a better feed and waste management strategies in this aquaculture operation