Search results for "SANITARIA"
showing 10 items of 520 documents
A mathematical model for wastewater modification processes assessment in a stabilization reservoir
2012
The paper presents a mathematical model for the simulation of the ecological status of a wastewater stabilization reservoir (WSR). WSRs are hypertrophic aquatic systems devoted to storage of water resources in warm countries where shortage conditions have quite often to be faced. Several factors that affect the stabilization reservoir effluent quality were taken into account: hydraulics and hydrology, solar radiation, atmospheric reaeration, algae, zooplankton, organic matter, pathogen bacteria, and sediment-water interaction. The model quantifies the specific influence of each factor on effluent quality, evaluating the correlation between the different considered factors. State variables i…
Roadmapping the Transition to Water Resource Recovery Facilities: The Two Demonstration Case Studies of Corleone and Marineo (Italy)
2022
The current exploitation of freshwater, as well as the significant increase in sewage sludge production from wastewater treatment plants (WWTPs), represent nowadays a critical issue for the implementation of sustainable development consistent with the circular economy concept. There is an urgent need to rethink the concept of WWTPs from the conventional approach consisting in pollutant removal plants to water resource recovery facilities (WRRFs). The aim of this paper is to provide an overview of the demonstration case studies at the Marineo and Corleone WRRFs in Sicily (IT), with the final aim showing the effectiveness of the resources recovery systems, as well as the importance of plant o…
Zeolites for the nutrient recovery from wastewater
2023
To meet the growing food demand of the world population, excessive use of chemical fertilizers is occurring to improve soil fertility and crop production. The excessive use of chemical fertilizers is not economically and environmentally sustainable. Indeed, from one hand, due to the increasing demand of fertilizers is rising their costs whereas, on the other hand, the accumulation of fertilizers in wastewaters is altering the homeostasis of the ecosystems thus causing serious damages to human health [1,2]. The recovery of nutrients, such as nitrogen (N) and phosphorus (P), from wastewaters is a good option to counteract both economic and environmental issues raised by the excessive use of f…
Didáctica de las ciencias experimentales y sociales
2004
Resumen basado en la publicación ; Este artículo ha sido concebido como contribución a la Década de la Educación para el desarrollo sostenible, instituida por Naciones Unidas para el período 2005-2014 En este artículo se delibera sobre que entre los contenidos curriculares escolares se encuentran temas de anatomía y fisiología del cuerpo humano donde se suelen tratar cuestiones de higiene y prevención de la enfermedad, pero ¿es esto educación para la salud?. De la misma forma, en los programas de conocimiento del medio y de ciencias de la naturaleza y biología se contemplan aspectos relativos al medio, los ecosistemas, las relaciones entre sus componentes, el equilibrio existente, y se estu…
Development of an aerobic digestion model for the assessment of greenhouse gases production (AeDMG1): Calibration and validation
2015
The increasing interest in greenhouse gas emissions from WWTPs has been leading to new tools for their designing and managing. The activated sludge models have been modified in order to consider on – site emissions from nitrification and denitrification, in particular. The biological nitrogen removal processes have been mainly assessing due to nitrous oxide (N2O) production as intermediate. The IPCC suggests that N2O contributes to climate change because it has a global warming potential 298-fold stronger than carbon dioxide. Even if the mathematical modelling is wide regarding the activated sludge models for greenhouse gases, a model for aerobic digestion is still not available. In this pa…
Il fenomeno delle dipendenze patologiche: alcol e droghe illecite. Protocollo di analisi delle sostanze di abuso nei liquidi biologici con finalità d…
2011
Estrategia de intervención sanitaria para mejorar la incidencia y prevalencia de la lactancia materna
2018
Introducción: Diferentes organismos nacionales e internacionales y autores con conocimientos en salud infantil, refrendan la afirmación de que la lactancia materna es el mejor alimento que pueden recibir neonatos y lactantes y, que no proporcionársela, perjudica a ellos, a la madre, a la sociedad y al planeta. Se destaca la necesidad de la alimentación con lactancia materna exclusiva hasta los 6 meses de edad y complementaria hasta que el niño ha cumplido al menos dos años. Esto se ha reflejado en diferentes publicaciones, estudios y guías de práctica clínica que exponen la evidencia científica. No obstante, pese a estas recomendaciones y múltiples campañas de apoyo y fomento a la lactancia…
Influence of the Oxic-Settling-Anaerobic (OSA) Process on Methane Production by Anaerobic Digestion of Sewage Sludge
2023
The present study evaluated different sludge-reduction mechanisms in the oxic-settling-anaerobic (OSA) process in terms of their effects on methane productivity by anaerobic digestion of sewage sludge. Two different layouts were investigated for the sludge return from an anaerobic side-stream reactor (ASSR) to the anoxic (scheme A) or the aerobic (scheme B) reactor of a pre-denitrification plant. Biochemical methane-potential (BMP) assays performed on the excess sludge revealed that scheme A promoted an overall increase of methane production in the OSA (20 mLCH4 gVSS−1d−1, +19%), although compared with a control CAS plant a significant decrease in the excess sludge production (3…