Water Recycle
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Cytogenotoxicity of SPL "(Spent Pot Liner" by plant root tip bioassays. / Citogenotoxidade do SPL (Spent Pot Liner) por meio de bioensaios vegetais em Ãpice radicular.
SPL (Spent Pot Liner) is a toxic solid waste generated by aluminum industry during the manufacturing of aluminum metal in electrolytic cells. It has a composition highly variable including fluoride salts, cyanides, metals and organic compounds. In Brazil, aluminum industries generate about 35,000 t of SPL per year. Some industries recycle this waste as feeds
Publicado em: 2008
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14. Reuso de agua em industria de reciclagem de embalagens plasticas : aspectos economicos e ambientais em modelo de escala real / Water reuse on plastics recycling pack industry : economical and enviromental aspects in real scale model
The discussion about technical, economical and environmental feasibility of water reuse in industrial process has been a constant concern. This thesis purposes a simplified alternative for waste water treatment seeking reuse in a plastic recycle industry. The water, in this case, is a prime component because it is the main element for the debris and impuriti
Publicado em: 2007
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15. Construction and evaluation of hydrocyclones models for wastewater treatment. / Construção e avaliação de modelos de hidrociclone para tratamento de agua residuaria.
In this work five different hydrocyclones were constructed based on geometry recommended by Rietema (1961) and Bradley (1965), for evaluation of the efficiency to separate emulsified oil from water. Its aim was to maximize the hydrocyclone efficiency as wastewater pre-depurator. Oil-in-water emulsions and solutions with particles of coal and Sacaromyces cere
Publicado em: 2007
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16. DESEMPENHO AMBIENTAL: ESTUDO DE CASO EM UMA INDÚSTRIA GRÁFICA / DESEMPENHO AMBIENTAL: ESTUDO DE CASO EM UMA INDÚSTRIA GRÁFICA
The concerning of the companies with the preservation of environment has increased significantly in the last years due to several requirements as: law demandings, sustainable development, protection to the internal market and also consumers more and more demanding. The environmental issues have been prevailing in the making-decision strategies in the technic
Publicado em: 2007
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17. Diagnóstico do consumo de água, da geração de efluentes e de resíduos sólidos em um laticínio de pequeno porte / Diagnosis the water consumption, the generation of effluents and solid residues from a small business producing dairy products
The new trend in the market is to reduce, to reuse and to recycle. Both large and small companies in different industries are adapting to this new scenario. In the interest of contributing to the new scenario, the general objective of this work was to make knowledge available on practices and / or procedures for the reduction of water consumption, the genera
Publicado em: 2007
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18. Simulation and optimization of sweetening and dehydration process of natural and refinary gas / Simulação e otimização dos processos de adoçamento e desidratação de gas natural e de refinaria
Two processes are widely used in the gas processing: sweetening and dehydration. Sweetening consists in removing acid gases, H2S and CO2, while dehydration is for water removing. The presence of these components causes several problems with the handling and transport of the gas like toxicity, corrosion and hydrate formation. So, it is clear the importance of
Publicado em: 2007
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19. Minimização do uso de água e efluentes com considerações econômicas e operacionais via programação matemática
A água é uma matéria-prima estratégica na indústria química, petroquímica e de alimentos, sendo utilizada em diversas etapas dos processos. Devido à importância econômica e ao impacto ambiental resultante do consumo da água na indústria, o uso racional da água vem sendo amplamente enfatizado. Nas últimas décadas, diversas metodologias foram pr
Publicado em: 2007
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20. Caracterização tecnológica de resíduos de construção e demolição. / Technological characterization of construction and demolition waste.
Construction and demolition waste (CDW) represents around 50% of the total solid waste and are essentially constituted by mineral fraction (>90%); therefore it?s possible to recycle it through mineral processing techniques. The development of different uses and the improvement of the typical technologies applied to CDW recycling are essential to achieve a sa
Publicado em: 2006
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21. Investigation geotechnical properties of a paper mill slugle. / Investigação sobre as características geotécnicas de um resíduo de papel.
The use of the residues generated by the paper industry as a geotechnical material, has become common practice in recent years. This practice is due to two important aspects: the economical and environmental aspects. The paper industry generates a significant amount of residue and with the increase of the costs related to the disposal of this material, there
Publicado em: 2002
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22. Estudo do efeito da agua na reação de oxidação catalitica de etanol para acetaldeido, visando redução de VOC
The kinetics of ethanol oxidation to acetaldehyde on Fe-Mo catalyst, was studied in a fixed bed tubular reactor, in the temperature range 235- 260 DEGREES C at atmospheric pressure. A search for the process improvement was made, by means of addition of water in the feed. Water act as vehicle to remove the heat and to reduce emissions of toxic organics in atm
Publicado em: 1995
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23. Redução fenilcetonas por fermento de pão imobilizado
We have studied the stereospecific reduction of phenylketones by IMBY (immobilized baker s yeast) that not only gives alcohols with high optical yields but can be reused in further reactions after regeneration of the cofator NADH. The chiral alcohols are valuable intermediates for pharmaceuticals synthesis. We have used chrysotile and montmorillonite as supp
Publicado em: 1992
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24. Bacteriological Evaluation of an Ultra-Pure Water-Distilling System
A prototype distillation and storage system with recycle for producing ultrapure water was monitored for bacteriological contamination during a period of 24 months. Naturally occurring Pseudomonas aeruginosa and P. cepacia were found to grow rapidly to levels of about 105/ml in water taken from the storage reservoir and also in commercially prepared distille