Search results for "Environmental engineering"

Dealing with a Trauma Burdened Past: between Remembering and Forgetting

2017

Recognition that societies will not be able to build a future as long as they do not face the ‘demons of the past’ has become a kind of universal truth over the last decades of the 20th Century (Gibney et al., 2008, p. 1). This view, though challenging and ambiguous, is reflected in the globally present attempts to improve or rebuild relations within and between different communities at the domestic and international level. The question concerning, on the one hand, the essence and most essential elements and, on the other hand, the instruments and the limitations of rebuilding relations, as well as the political implications of those processes have become the broad area of interest and the …

Real-time optimization of the key filtration parameters in an AnMBR: Urban wastewater mono-digestion vs. co-digestion with domestic food waste

2018

[EN] This study describes a model-based method for real-time optimization of the key filtration parameters in a submerged anaerobic membrane bioreactor (AnMBR) treating urban wastewater (UWW) and UWW mixed with domestic food waste (FW). The method consists of an initial screening to find out adequate filtration conditions and a real-time optimizer applied to a periodically calibrated filtration model for minimizing the operating costs. The initial screening consists of two statistical analyses: (1) Morris screening method to identify the key filtration parameters; (2) Monte Carlo method to establish suitable initial control inputs values. The operating filtration cost after implementing the…

Direct electricity production from Avgas UL91 fuel

2016

As fuel for fuel cells can be used various substances, but generally fuel cells are powered by hydrogen. However, problems with the storage of hydrogen are the reason for the search of new fuels for fuel cells. The paper presents the possibility of using Avgas fuel as fuel for fuel cell. The Avgas does not have the feature of electrical conductivity, for this reason a detergent (nonionic surfactant) was used for dissolving fuel in an electrolyte. The work shows possible electrooxidation of Avgas fuel emulsion prepared on the basis of a nonionic surfactant on a platinum electrode in an aqueous solution of H2SO4. As non-ionic surfactant was used the detergent Syntanol DS-10. The emulsion was …

Possibility of fuel cell powering with grape seed oil

2015

In the last few years alternative energy sources have been fast developing. One of technical device using these sources is fuel cell. Fuel cell performs direct conversion of chemical fuel into electrical energy, without combustion and characterized by high efficiency. Most commonly fuel cells are powered by hydrogen. However, problems with the storage of hydrogen are the reason for the search of new fuels for fuel cells. Due to development of the renewable energy sources, the powering of high efficiency power sources with bio-fuels is very important. Vegetable oil is an alternative fuel for Diesel engines and for heating oil burners. Powering high efficiency power sources (like fuel cells) …

Possibility of using NiCO2O4 alloy as catalyst for fuel electrode of hydrazine fuel cell

2016

The work presents a possibility of the use of NiCo2O4 alloys as catalysts for electrooxidation of hydrazine. The research was done by the method of polarizing cuvers of electrooxidation of hydrazine in glass vessel in aqueous solution of KOH, on electrode with NiCo2O4 alloy as a catalyst. Conducted measurements show that there is a possibility of electrooxidation of hydrazine on NiCo2O4 electrode. The current density is low, but the price of the catalyst is much lower than platinum.

Stop Ni - Co jako katalizator anody ogniwa paliwowego zasilanego alkoholem metylowym

2016

Możliwość bezpośredniego zasilania ogniwa paliwowego biopaliwem

2017

Praca przedstawia analizę możliwości zasilania ogniw paliwowych biopaliwami. Analizy dokonano na podstawie rozpoznania pozycji literaturowych oraz badań własnych. Przeanalizowano wykorzystanie biogazu, wodoru pozyskanego metodami biologicznymi, wykorzystanie alkoholu metylowego oraz olejów roślinnych. Wykazano, że w przypadku metanolu istotnym jest poszukiwanie katalizatorów nie zawierających metali szlachetnych, natomiast w przypadku olejów roślinnych uzyskiwane wartości gęstości prądu nie pozwalają obecnie na zbudowanie ogniwa paliwowego o dużej wydajności. Wykazano, że jednak istnieje możliwość zasilania ogniw paliwowych biopaliwami, jednak konieczne są jednak, prace zmierzające do podwy…

Ogniwa paliwowe i mikrobiologiczne ogniwa paliwowe - zastosowanie druku 3D

2018

Technologie ogniw paliwowych i mikrobiologicznych ogniw paliwowych mogą stać się w przyszłości jednymi z dominujących technologii wytwarzania energii elektrycznej. Konieczne są więc badania związane z tymi technologiami. Technologią, która może usprawnić prowadzenie badań w tym zakresie jest technologia druku 3D. Pozwala ona na wykonywanie dowolnych kształtów w jednym egzemplarzu. Ponadto koszt projektu i wydruku jest stosunkowo niski. Dzięki tej technologii można znacznie przyspieszyć prowadzenie badań z zakresu ogniw paliwowych i mikrobiologicznych ogniw paliwowych. Praca przedstawia wykorzystanie druku 3D w badaniach nad ogniwami paliwowymi i mikrobiologicznymi ogniwami paliwowymi prowad…

Approche d'un territoire de montagne : occupations humaines et contexte pédo-sédimentaire des versants du col du Petit-Saint-Bernard, de la Préhistoi…

2014

As part of a multi-year programme, survey campaigns have been carried out on both slopes of the Petit-Saint-Bernard pass (2188 m, western Alps), at an altitude of between 750 and 3000 m. The method employed abandons ground-based surveying in favour of multiple manual surveys carried out on selected topographic contexts down to the base of the Holocene fill. The results obtained document the longterm development of the pedo-sedimentary dynamic and the occupation of the different altitude stages. The significance of the archaeological data collected is discussed in relation to the state of knowledge in a comparison area including the neighbouring valleys of the western Alps, to existing settl…

Shifts in plankton assemblages promoted by free water surface constructed wetlands and their implications in eutrophication remediation

2015

Abstract Two units of free water surface constructed wetlands (FWSCWs) were created in 2009 in a Mediterranean protected site, the Albufera de Valencia Natural Park, to treat eutrophic inflows to the Albufera de Valencia lagoon, the largest coastal lagoon in the Iberian Peninsula, affected by cultural eutrophication. Data of phytoplankton and zooplankton biomass and richness of the inflows and outflows corresponding to the first 3.5 years of operation of the system have been analyzed to evaluate the role of plankton in the eutrophication reversion. The FWSCWs significantly reduced the exported microalgal biomass, stimulated the potential mixotrophic groups of phytoplankton such as Euglenoph…