Search results for "sanita"
showing 10 items of 855 documents
Effect of biomass features on oxygen transfer in conventional activated sludge and membrane bioreactor systems
2019
Abstract The aim of the present study was to compare the oxygen transfer efficiency in a conventional activated sludge and a membrane bioreactor system. The oxygen transfer was evaluated by means of the oxygen transfer coefficient and α-factor calculation, under different total suspended solids concentration, extracellular polymeric substances, sludge apparent viscosity and size of the flocs. The oxygen transfer coefficient and α-factor showed an exponential decreasing trend with total suspended solid, with a stronger oxygen transfer coefficient dependence in the conventional activated sludge compared to the membrane bioreactor. It was noted that the oxygen transfer coefficient in the conve…
Effect of biomass features on oxygen transfer in Conventional Activated Sludge and Membrane BioReactor systems
2018
The present study reports the results on the comparison between the oxygen transfer efficiency in a conventional activated sludge (CAS) and membrane bioreactor (MBR) system. The oxygen transfer was evaluated by means of the oxygen transfer coefficient (kLa)20 and α-factor calculation, under different operating conditions and with different activated sludge features, including total suspended solids (TSS) concentration, extracellular polymeric substances (EPS) content and composition, sludge viscosity and size of the flocs. The (kLa)20 and α-factor showed an exponential decreasing trends with TSS in the CAS and MBR, even if it was noted that the (kLa)20 dependence on TSS was stronger in the …
Approche démographique du risque sanitaire en Afrique
2015
International audience; ...
Analyse du système sanitaire nigérien
1984
référence interne : 84038
Histaprodifens: synthesis, pharmacological in vitro evaluation, and molecular modeling of a new class of highly active and selective histamine H(1)-r…
2000
A new class of histamine analogues characterized by a 3, 3-diphenylpropyl substituent at the 2-position of the imidazole nucleus has been prepared outgoing from 4,4-diphenylbutyronitrile (4b) via cyclization of the corresponding methyl imidate 5b with 2-oxo-4-phthalimido-1-butyl acetate or 2-oxo-1,4-butandiol in liquid ammonia, followed by standard reactions. The title compounds displayed partial agonism on contractile H(1) receptors of the guinea-pig ileum and endothelium-denuded aorta, respectively, except 10 (histaprodifen; 2-[2-(3, 3-diphenylpropyl)-1H-imidazol-4-yl]ethanamine) which was a full agonist in the ileum assay. While 10 was equipotent with histamine (1), methylhistaprodifen (…
Monitoraggio dell’adeguatezza prescrittiva dell’albumina per uso terapeutico nel triennio 2009-2011 presso una realtà ospedaliera di Palermo
2013
OBIETTIVI: L'elaborazione di una modulistica standardizzata di richiesta di albumina rientra tra gli strumenti di razionalizzazione delle risorse sanitarie, inteso sia come contenimento dei costi che come uso conforme alle raccomandazioni e linee guida internazionali; l'albumina infatti è un farmaco di elevato costo e dal frequente utilizzo in circostanze non appropriate e recenti evidenze scientifiche dimostrano come alcune delle indicazioni tradizionali mostrano uno sfavorevole rapporto costo/beneficio, e in altri casi addirittura provocano un aumento della mortalità nei pazienti non opportunamente trattati. METODI: A partire dal 2009, in un ospedale palermitano a gestione pubblico-privat…
Les cliniques privées en Algérie : l’émergence d’un nouvel acteur dans le paysage sanitaire
2015
En Algérie, le champ de la santé s’est modifié avec l’émergence et l’extension du secteur privé des soins à but lucratif surtout dans sa composante «cliniques privées» mettant ainsi fin à l’hégémonie pendant trois décennies du secteur public. Un système de soins hybride en a résulté où un secteur public caractérisé par de multiples dysfonctionnements semble nourrir un secteur privé en pleine croissance. Les cliniques privées comme nouvelle figure dans le paysage sanitaire représentent des innovations organisationnelles qui rompent avec les modes de fonctionnement anciens. De nouvelles façons de faire s’observent, des modalités de coopération inhabituelles et des modes de coordination inédit…
Effect of Temperature on N2O and NO Emission in a Partial Nitrification SBR Treating Reject Wastewater
2017
Temperature is a very important parameter during nitritation, having a direct effect on ammonia oxidation rate (AOR) and enzymatic activities which relate to both N2O and NO emission. This study aims at investigating the effect of temperature on AOR, N2O and NO production in an enriched ammonia oxidizing bacteria (AOB) sequencing batch reactor (SBR) performing partial nitrification (PN) of synthetic reject wastewater. To achieve that, a SBR was subject to several shifts in temperature (in the range of 30 to 15 °C, 5 °C for each decrease). Cycle studies, which contain two aeration phases, were conducted under each temperature. The results showed that AOR specific exponentially correlates wit…
Anaerobic moving bed biofilm reactor followed by aerobic granular sludge for brewery wastewater treatment
2018
Small and medium breweries discharging to municipal sewers without treatment generate significant loads with typical concentrations reported by Valta et al. (2014) as 2-6 g COD L-1, 25-80 mg TN L-1, 10-50 mg TP L-1, with pH between 4.5 and 12. Treatment of the high-strength wastewater requires specialized low footprint processes, such as aerobic granular sludge (AGS), capable of high-rate degradation, as well as simultaneous nitrogen and phosphorous removal (Wang et al., 2007). The objective of this study was to evaluate the start-up period of AGS receiving brewery wastewater after initial anaerobic pre-treatment.
Risque phytosanitaire (ARP) portant sur Fusarium oxysporum f. sp. cubense (agent pathogène responsable de la maladie de Panama) pour les départements…
2018
Risque phytosanitaire (ARP) portant sur [i]Fusarium oxysporum[/i] f. sp.[u] cubense[/u] (agent pathogène responsable de la maladie de Panama) pour les départements d'Outre-mer