Infección por Mycobacterium avium en perros: revisión del tema y presentación de un caso clínico

Los perros son naturalmente resistentesa las infecciones por el complejo Mycobacteriumavium-intracellulare (MAC); sinembargo, existe una predisposición enciertas razas, así como en algunos individuosen particular. La presentación clínicamas frecuente se caracteriza por cuadrosgastrointestinales con compromiso delinfonódulos superficiales y profundos.El diagnóstico confirmatorio constituyeun desafío para el veterinario clínicoe involucra tinciones específicas (ZiehlNeelsen), cultivos diferenciales y métodosmoleculares. Existen diferentes protocolosantibióticos para el tratamiento siendo elpronóstico, en muchos casos, reservado. Elobjetivo de este trabajo fue realizar unarevisión sobre la infección por MAC encaninos así como la presentación de uncaso clínico de un canino joven de razaSchnnauzer Miniatura oriundo de BuenosAires, Argentina.Fil: Borrás, Pablo Jesús. No especifíca;Fil: Iachini, Ricardo. No especifíca;Fil: Di Sarli, Cecilia. No especifíca;Fil: Fernandez, Federico. No especifíca;Fil: Martinez Vivot, Marcela. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias; ArgentinaFil: Mondillo, Gabriel. No especifíca;Fil: Marfil, Maria Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias; ArgentinaFil: Falzioni, Elvira. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias; ArgentinaFil: Barandiaran, Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias; Argentin

Resource recovery from pig manure via an integrated approach : a technical and economic assessment for full-scale applications

MARIS, Bernard. Des Économistes Au-dessus de Tout Soupçon, ou la GrandeMascarade des Prédictions. Paris, Albin Michel, 1990

Resource recovery from pig manure via an integrated approach : a technical and economic assessment for full-scale applications

Intensive livestock farming cannot be uncoupled from the massive production of manure, requiring adequate management to avoid environmental damage. The high carbon, nitrogen and phosphorus content of pig manure enables targeted resource recovery. Here, fifteen integrated scenarios for recovery of water, nutrients and energy are compared in terms of technical feasibility and economic viability. The recovery of refined nutrients with a higher market value and quality, i.e., (NH4)(2)SO4 for N and struvite for P, coincided with higher net costs, compared to basic composting. The inclusion of anaerobic digestion promoted nutrient recovery efficiency, and enabled energy recovery through electricity production. Co-digestion of the manure with carbon-rich waste streams increased electricity production, but did not result in lower process costs. Overall, key drivers for the selection of the optimal manure treatment scenario will include the market demand for more refined (vs. separated or concentrated) products, and the need for renewable electricity production

Resource recovery from pig manure via an integrated approach : a technical and economic assessment for full-scale applications

Intensive livestock farming cannot be uncoupled from the massive production of manure, requiring adequate management to avoid environmental damage. The high carbon, nitrogen and phosphorus content of pig manure enables targeted resource recovery. Here, fifteen integrated scenarios for recovery of water, nutrients and energy are compared in terms of technical feasibility and economic viability. The recovery of refined nutrients with a higher market value and quality, i.e., (NH4)(2)SO4 for N and struvite for P, coincided with higher net costs, compared to basic composting. The inclusion of anaerobic digestion promoted nutrient recovery efficiency, and enabled energy recovery through electricity production. Co-digestion of the manure with carbon-rich waste streams increased electricity production, but did not result in lower process costs. Overall, key drivers for the selection of the optimal manure treatment scenario will include the market demand for more refined (vs. separated or concentrated) products, and the need for renewable electricity production

The ManureEcoMine pilot installation : advanced integration of technologies for the management of organics and nutrients in livestock waste

Manure represents an exquisite mining opportunity for nutrient recovery (nitrogen and phosphorus), and for their reuse as renewable fertilisers. The ManureEcoMine proposes an integrated approach of technologies, operated in a pilot- scale installation treating swine manure (83.7%) and Ecofrit (R) (16.3%), a mix of vegetable residues. Thermophilic anaerobic digestion was performed for 150 days, the final organic loading rate was 4.6 kgCOD m(-3) d(-1), with a biogas production rate of 1.4 Nm(3) m(-3) d(-1). The digester was coupled to an ammonia side- stream stripping column and a scrubbing unit for free ammonia inhibition reduction in the digester, and nitrogen recovery as ammonium sulphate. The stripped digestate was recirculated daily in the digester for 15 days (68% of the digester volume), increasing the gas production rate by 27%. Following a decanter centrifuge, the digestate liquid fraction was treated with an ultrafiltration membrane. The filtrate was fed into a struvite reactor, with a phosphorus recovery efficiency of 83% (as orthophosphate). Acidification of digestate could increment the soluble orthophosphate concentration up to four times, enhancing phosphorus enrichment in the liquid fraction and its recovery via struvite. A synergistic combination of manure processing steps was demonstrated to be technologically feasible to upgrade livestock waste into refined, concentrated fertilisers