Search results for "Ambiente"
showing 10 items of 1727 documents
Preliminary data on correlations between aberrant benthic foraminifera and metal concentrations in sediments from Palermo and Termini gulfs (Sicily)
2005
Estudio del compostaje como técnica para la eliminación de contaminantes emergentes
2017
Desde hace unos años está surgiendo una nueva clase de contaminantes químicos utilizados por el hombre con distintas finalidades y denominados contaminantes emergentes, entre los cuales se incluyen los productos farmacéuticos. Todos estos compuestos se encuentran en las aguas residuales, y como las estaciones de depuración de aguas residuales no están acondicionadas para eliminarlos, acaban liberándose en el medio ambiente. La mayor acumulación de estos compuestos se produce en los lodos que son utilizados en agricultura y compostaje. De hecho, se han encontrado fármacos de uso humano y fungicidas de aplicación agrícola en aguas superficiales, suelos, biosólidos e incluso en agua potable. E…
Use of rumen microorganisms to boost the anaerobic biodegradability of microalgae
2017
[EN] A laboratory bioreactor using rumen microorganisms to treat Scenedesmus spp. biomass was operated for 190 days. At first the bioreactor operated as a Rumen-like Fermenter (RF) with a Sludge Retention Time (SRT) of 7 days. The RF was subsequently transformed into an anaerobic digestion system including two configurations: continuously-stirred tank reactor and anaerobic membrane bioreactor in which different SRT values of up to 100 days were assessed. Methane production peaked at 214 mL CH4 g−1 CODIn with a SRT of 100 days. COD removal and BDP peaked at above 70% and 60%, respectively, at the highest SRT, with no pre-treatment prior to microalgae digestion. The waste sludge product…
Competencias en salud ambiental de los jóvenes valencianos
2017
En esta comunicación se presentan los resultados de un estudio desarrollado con jóvenes valencianos para conocer las competencias en salud ambiental que adquieren en su paso por la educación obligatoria. Para ello se elaboró un cuestionario, validado por un grupo de expertos y sometido a una prueba piloto. El cuestionario aborda su concepto de salud, así como las relaciones que son capaces de establecer entre la salud y el medio ambiente y plantea cinco problemas de salud ambiental. El cuestionario fue sometido a un análisis cuantitativo y cualitativo, considerando tres variables: tipología del centro (rural o urbano), nivel educativo y género. Los resultados muestran que el alumnado al fin…
Anaerobic treatment of urban wastewater in membrane bioreactors: evaluation of seasonal temperature variations
2014
The objective of this study was to evaluate the effect of seasonal temperature variations on the anaerobic treatment of urban wastewater in membrane bioreactors (MBRs). To this aim, sludge production, energy recovery potential, chemical oxygen demand (COD) removal and membrane permeability were evaluated in a submerged anaerobic MBR fitted with industrial-scale membrane units. The plant was operated for 172 days, between summer and winter seasons. Sludge production increased and energy recovery potential decreased when temperature decreased. COD removal and membrane permeability remained nearby stable throughout the whole experimental period.
BioMet14 XIV PharmacoBioMetallics Pisa, 24-25 ottobre 2014
2014
Associations of the FTO rs9939609 and the MC4R rs17782313 polymorphisms with type 2 diabetes are modulated by diet, being higher when adherence to th…
2012
Background: Although the Fat Mass and Obesity (FTO) and Melanocortin-4 Receptor (MC4R) genes have been consistently associated with obesity risk, the association between the obesity-risk alleles with type 2 diabetes is still controversial. In some recent meta-analyses in which significant results have been reported, the associations disappeared after adjustment for body mass index (BMI). However gene-diet interactions with dietary patterns have not been investigated. Our main aim was to analyze whether these associations are modulated by the level of adherence to the Mediterranean Diet (MedDiet). Methods: Case-control study in 7,052 high cardiovascular risk subjects (3,430 type 2 diabetes c…
“Budapest”, “Berlino”, “Tallinn”, “Intervenire negli spazi di abitazione privati per rigenerare la città pubblica”
2004
MANUTENZIONE DELL’AMBIENTE COSTRUITO: QUANTO RESTA DELLA NOTTE?
2021
Confrontando la manutenzione dell’ambiente costruito con la stessa attività riferita, in genere, ai prodotti manifatturieri, importanti caratteristiche specifiche emergono, sia nelle tecnologie di processo che di prodotto. Infatti, per le costruzioni lo stretto legame tra manutenzione e qualità acquisisce, in più, notevoli implicazioni di ordine sociale e collettivo, sia se applicata a edifici e spazi pubblici, sia se riferita all’edilizia residenziale privata. Nonostante ciò, tenendo conto della tendenza al “constructuring” che sembra indirizzare il futuro dell’edilizia sotto gli influssi della digitalizzazione, è ugualmente utile tener presente gli avanzamenti nel campo della manutenzione…
Design methodology for submerged anaerobic membrane bioreactors (AnMBR): A case study
2015
[EN] The main objective of this study is to propose guidelines for designing submerged anaerobic MBR (AnMBR) technology for municipal wastewater treatment. The design methodology was devised on the basis of simulation and experimental results from an AnMBR plant featuring industrial-scale hollow-fibre membranes. The proposed methodology aims to minimise both capital expenditure and operating expenses, and the key parameters considered were: hydraulic retention time, solids retention time, mixed liquor suspended solids concentration in the membrane tank, 20 C-standardised critical flux, specificgas demand per square metre of membrane area, and flow of sludge being recycled from the membrane …