37 documents found, page 1 of 4
Água com turvação amarelo-acastanhada na torneira do consumidor: controlo e pr...
Poças, A.; Menaia, J.; Rosa, M. J.O aparecimento de água com turvação amarelo-acastanhada na torneira do consumidor é um problema com que se defrontam muitas entidades gestoras. É causa de insatisfação e desconfiança na qualidade do serviço prestado, e consequentemente de reclamações. O fenómeno é vulgarmente tido como resultado da corrosão de condutas metálicas, dado o aspeto ferruginoso e os elevados teores em ferro das partículas em suspensã...
Resilient Water Supply - Feddback from validation and demonstration in partner ...
Bruaset, S.; Menaia, J.; Sivertsen, E.PREPARED Enabling Change gathered urban utilities in Europe and worldwide to develop advanced strategies in meeting the upcoming challenges for water supply and sanitation brought by climate change. The project linked comprehensive research with development programmes in these utilities. The PREPARED vision provided significant synergistic opportunities that the utilities can utilise to improve their preparedne...
Guidelines for improved operation of drinking water treatment plants and mainte...
Rosa, M. J.; Menaia, J.; Poças, A.; Bruaset, S.Project PREPARED addresses the adaptation of the water sector to climate change effects. It has been anticipated that some of the impacts of climate change, such as rises in average temperature and sea level, will only become apparent after many years. However, climate change-driven events are already happening with increasing frequency and intensity. This is the case of extreme storm and rain events and heat, ...
Microsystin-LR and natural organic matter removal by biologically active carbon...
Mesquita, E.; Menaia, J.; Rosa, M. J.Microcystin-LR (MC-LR) occurrence in surface water bodies is a worldwide issue of increasing concern due to climate change/global warming and their resistance to conventional treatment. The biologically active carbon filters (BACs), where both adsorption and biodegradation take place, are a promising option for upgrading the treatment plants, but the synergistic effects occurring in BAC filters are a key to suc...
Impact of slurry management strategies on potential leaching of nutrients and p...
Fangueiro, D.; Surgy, S.; Napier, V.; Menaia, J.; Vasconcelos, E.; Coutinho, J.For farmers, management of cattle slurry (CS) is now a priority, in order to improve the fertilizer value of the slurry and simultaneously minimize its environmental impact. Several slurry pre-treatments and soil application methods to minimize ammonia emissions are now available to farmers, but the impact of such management strategies on groundwater is still unclear. A laboratory experiment was performed over ...
Discolouration loose deposits: balancing views and practices
Poças, A.; Menaia, J.; Vreeburg, J.; Rietveld, L.; Rodrigues, S.; Rebola, N.; Benoliel, M. J.Tap water discolouration incidents may occur due to resuspension of loose deposits (LD) that accumulate in drinking water distribution systems (DWDS), due to velocity increases or rapid changes. While lowering the consumers’ confidence in tap water’s safety, they are often a cause of customer complaints, especially when recurrent. Owing to the lack of knowledge on LD dynamics and build-up processes in DWDS, how...
Real-time monitoring and forecasting system for early warning of recreational w...
David, L. M.; Oliveira, A.; Rodrigues, M.; Fortunato, A. B.; Rogeiro, J.; Antunes, G. J.; Mota, T.; Costa, J.; Menaia, J.; Póvoa, P.; David, C.A new WebGIS platform for urban drainage management was developed based on the integration of catchment-to-receiving waters modelling and on real-time on-line monitoring networks. The platform is devoted to the surveillance and real-time decision support for urban drainage management, especially for issuing early warnings for faecal contamination in receiving waters. The water information forecast framework (WI...
Modeling of chlorine decay in drinking water supply systems using EPANET MSX
Monteiro, L.; Figueiredo, D.; Dias, S.; Freitas, R.; Covas, D.; Menaia, J.; Coelho, S. T.The modelling of chlorine residual in water supply systems is of great importance in managing disinfectant concentrations throughout the network. First order decay kinetics are currently often used to describe both bulk and wall chlorine consumption. However, more complex approaches have been proposed, namely a parallel, two-reactant second order decay model (2R model) that has been reported as yielding better ...
A qualidade da água nos sistemas de distribuição num contexto de gestão patrimo...
Poças, A.; Silva, M. S.; Monteiro, L.; Menaia, J.; Coelho, S. T.Os sistemas urbanos de água são projetados para garantir o fornecimento ininterrupto de água com qualidade numa perspetiva de longo prazo. A gestão patrimonial das infraestruturas (GPI) visa a gestão estratégica e sustentável do património existente em infraestruturas. O objetivo deste trabalho foi abordar a gestão da qualidade da água nos sistemas de distribuição num contexto de GPI. Para tal, foram definidos ...
Plataforma de previsão e monitorização em tempo real para gestão operacional de...
David, L. M.; Oliveira, A.; Rodrigues, M.; Fortunato, A. B.; Menaia, J.; Póvoa, P.; David, C.; Ferreira, F.; Costa, J.; Mota, T.; Rogeiro, J.; Jesus, G.Foi desenvolvida e implementada uma nova plataforma para gestão operacional de sistemas de drenagem urbana, com base num sistema de previsão que utiliza modelos integrados entre bacia de drenagem, ETAR e meio recetor, redes de monitorização com transmissão de dados em tempo real e um sistema de comparação automática entre dados monitorizados e resultados das previsões. Denominada WIFF (Water Information and For...