Browsing by Issue Date, starting with "2018-06-20"
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- Screening of Solid Waste as Filler Material for Constructed WetlandsPublication . Mateus, D. M. R.; Pinho, Henrique J. O.The reuse of solid waste can contribute to reducing Earth’s resource depletion, directly through use in the original production processes or by valorisation in alternative applications. In the present work, ten solid wastes were evaluated as candidates for filling material in constructed wetlands (CWs). For that purpose, physical characterization, leaching and adsorptiontests were conducted. Limestone fragments and brick fragments resulting from construction activities, coal slags resulting from power plants, snail shells resulting from the food and catering industry, and cork granulates resulting from the cork industry have potential for use as CW fillers. These five materials have adequate physical properties and some capacity to adsorb phosphorous and organic compounds from wastewater. On the other hand, crushed eggshells resulting from egg farms, dealcoholized grape pomaces resulting from alcohol distilleries, olive seeds waste from olive-oil mills, and pine bark fragments and wood pellets resulting from forestry cleaning activities, wood mills and pulp mills did not demonstrate sufficient potential to be used as CW fillers, either because they have very low adsorption capacities or leach compounds in contact with water, or because they have less adequate physical properties. None of the tested solid wastes showed the ability to adsorb nitrogen compounds. Although the five selected materials do not present a special capability for adsorption of nitrogen, phosphorous and organic compounds, they can all be valued as CW fillers, representing a way to reduce the amount of solid waste sent to landfills.
- Combination of various solid wastes with fragmented limestone as filler for constructed wetlands used for wastewater treatmentPublication . Mateus, D. M. R.; Graça, Nuno; Alves, Ana; Pinho, Henrique J. O.This study aims to contribute to the development of eco-efficient constructed wetlands through the concept of circular economy and the use of waste to treat waste Combinations of five solid wastes were evaluated as filler materials for CWs used for wastewater treatment To evaluate the combined capability of the waste materials to wastewater treatment, five sets of unplanted lab-scale CWs were established The CWs were operated in a discontinuous mode for three successive fill and drain cycles The highest COD removal rate was obtained for a CW filled with limestone and cork waste 90.3+/-0.9%. The highest total nitrogen removal rate was obtained for a CW filled with limestone and clay brick fragments 84.8+/-0.1%. Total phosphorus removal percentage of 91.8+/-0.1% was achieved for a control CW filled with limestone It was observed that layer packed solid waste combination fillings are adequate in improving COD removal in limestone based CWs, and that all but the limestone snail shells filling have a very good performance for total nitrogen and total phosphorus removal from wastewater.
- Diesel Engine Condition Monitoring Due to Different Operation AreasPublication . Lampreia, Suzana Paula Gomes Fernando da Silva; Lobo, Victor J. A. S.; Requeijo, José GomesWhen a ship design is developed, its engines are installed accordingly the owner requisites and the environment conditions in the designated operation area. Usually they are not adapted to sail all over the world. This implies that in some cases the power output cannot be the same for the safety of the engine, If a engine was conceived to operate on 16ºC of ocean sea, when it navigates on a 36ºC ocean, the engine power must be limited in order to not provoke major damage. Due to the fact, in this study two diesel engines will be monitor with online data collection and statistical treatment. The statistic treatment will be with the univariate control charts. With the engines operating on a range of ocean temperatures form 16ºC to 36ºC, the power limitatiom and the systems must be flexible due the use of the engines and consequently the use of ships over sea.
- Whey protein supplementation in the elderlyPublication . Ramos, Rita; Pereira, Paula; Domingos, Josefa; Godinho, Catarina
- Benefits of the clinical pilates program in lower back pain in young handball playersPublication . Sousa, Ana Luísa; Mateus, Ana Rita; Semedo, Anexvandra; Casinha, Jéssica; Moleirinho-Alves, Paula; Pereira, Ângela Maria
- Participation of the agonist and antagonist knee extensor muscles in drop kick, placing kick and up and under kick, in rugby athletesPublication . Dias, Inês; Godinho, Leonor Mira; Pinho, Miguel; Sá, Tiago de; Sousa, João Paulo; Pereira, Ângela Maria
- Posturographic changes in university students with temporomandibular dysfunctionPublication . Batista, Ana Madalena; Evangelho, Carolina; Elias, Joana; Silva, Patrícia; Sousa, João Paulo; Pereira, Ângela Maria
- Dental caries incidence in a sample of endurance sports athletesPublication . Carvalho, Marta; Júdice, André; Manso, Cristina; Rozan, Cecília; Vicente, Filipa; Família, Carlos; Oom, Madalena; Mendes, José João; Godinho, Catarina
- Co-amorphization of olanzapine for solubility enhancementPublication . Costa, Nuno F. da; Fernandes, Ana Isabel; Pinto, João F. Pinto
- Effect of dry needling vs manual myofascial therapy at the trigger points in temporomandibular dysfunctionPublication . Neto, Alcídeo; Sousa, Dina; Batanete, Margarida; Caveirinha, Vasco; Moleirinho-Alves, Paula; Pereira, Ângela Maria