RESUMO
Parque Porcino de Ventanilla has an extension of 840ha with 2200 farmers dedicated to pig production. There is a lack of services in the area (i.e., water supply, electricity, or waste collection). Anaerobic treatment of pig manure would replace current dumping and incineration, reducing environmental pollution and hazards to public health, as well as providing an organic fertilizer and biogas. The objective of the present work was to study the viability of ambient temperature anaerobic digestion of pig manure diluted in urine, by means of on-site pilot scale reactors. The final goal was to establish design parameters for anaerobic digesters to be implemented; since it was part of a project to improve life conditions for the farmers through the incorporation of better management techniques. Experiments were carried out in a low-cost pilot plant, which consists of three anaerobic digesters (225L total volume), without heating or agitation, placed in a greenhouse. The start-up of the digestion process was performed with a mixture of temperature adapted pig manure-sludge and fresh rumen, and showed a good performance regardless of the dilution of pig manure with water or urine, which is a key parameter due to the scarcity of water in the area under study.
Assuntos
Reatores Biológicos , Fezes , Metano/metabolismo , Urina , Eliminação de Resíduos Líquidos/métodos , Animais , Poluição Ambiental/prevenção & controle , Peru , Projetos Piloto , Suínos , TemperaturaRESUMO
The lignin biodegradation process has an important role in the carbon cycle of the biosphere. The study of this natural process has developed mainly with the use of basidiomycetes in laboratory investigations. This has been a logical approach since most of the microorganisms involved in lignocellulosic degradation belong to this class of fungi. However, other microorganisms such as ascomycetes and also some bacteria, are involved in the lignin decaying process. This work focuses on lignin biodegradation by a microorganism belonging to the ascomycete class, Chrysonilia sitophila. Lignin peroxidase production and characterization, mechanisms of lignin degradation (lignin model compounds and lignin in wood matrix) and biosynthesis of veratryl alcohol are outstanding. Applications of C. sitophila for effluent treatment, wood biodegradation and single-cell protein production are also discussed.
Assuntos
Ascomicetos/metabolismo , Lignina/metabolismo , Biodegradação Ambiental , Hidrólise , Estrutura Molecular , PeroxidasesRESUMO
Neste trabalho analisam-se os aportes de W.R.Bion à psicanálise, tomando-se como eixo os termos novos que introduziu na teoria e seu uso pela comunidade psicanalítica. Discutem-se alguns destes termos (os mais usados e também os menos usados) assim como suas características estilísticas e implicações. Alerta-se para o risco de que se convertam em um jargão, mais para reforçar a identidade daquele que os usa do que por uma compreensão autêntica daquilo que o autor quis transmitir(au)
Assuntos
Teoria PsicanalíticaRESUMO
Neste trabalho analisam-se os aportes de W. R. Bion a psicanalise, tomando-se como eixo os termos novos que introduziu na teoria e seu uso pela comunidade psicanalitica. Discutem-se alguns destes termos (os mais usados e tambem os menos usados) assim como suas caracteristicas estilisticas e implicacoes. Alerta-se para o risco de que se convertam em um jargao, mais para reforcar a identidade daquele que os usa do que por uma compreensao autentica daquilo que o autor quis transmitir.
Assuntos
Psicanálise , Comportamento Exploratório , Tempo , Psicanálise , Comportamento Exploratório , PrevisõesRESUMO
Present day concepts about history, etiology, embriology, and management of gastroschisis are reviewed and a case is reported; it was treated in two surgical steps. A silastic net was applied and the intestinal loops were gradually introduced until the abdominal defect closed completely. Parenteral feeding was also given.