Searched for: subject%3A%22Aeration%22
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van Gent, Koen (author)
When waves break, air and water mix and small air bubbles are formed in the water, creating aeration. The mixture of air and water alters the behavior of the fluid. Traditionally, it has been assumed that aeration has a damping effect on impact, as exemplified by the use of air bubbles in the swimming pool below the Olympic 10m platform and...
master thesis 2023
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Buisma-Yi, S.C. (author), Meza Ramos, P.N. (author), Oonk, Hans (author), Gebert, J. (author)
In the Netherlands, three full-scale pilots have been in operation for approximately five years to understand the effects of leachate recirculation or aeration on waste stabilisation. This study employs the ratio of N2 to Ar in the landfill gas in comparison to the ratio in atmospheric air to derive the share of N2 that originates from...
conference paper 2023
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Gebert, J. (author), Meza Ramos, P.N. (author), Cruz Osorio, C.R. (author), Lammen, J.K. (author)
This study quantifies the share of aerobically produced carbon (aeration efficiency) during six years of a full scale landfill aeration project using the balance between methane and carbon dioxide in the bulk extracted gas. Aeration was realized by overextraction. Aeration enhanced carbon release in comparison to the anaerobic ‘base case’, as...
conference paper 2023
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Duarte Campos, L.A. (author), Rees-White, T. (author), Beaven, R.P. (author), Cruz Osorio, C.R. (author), Lammen, J.K. (author), Gebert, J. (author)
This paper presents the preliminary results of field trials conducted to investigate the air permeability of waste at the Braambergen landfill located near the city of Almere, the Netherlands. Pressure variations were monitored in surrounding wells during air extraction tests using differential pressure transducers. The magnitude of the pressure...
conference paper 2023
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Strubbe, Laurence (author), van Dijk, E.J.H. (author), Deenekamp, Pascalle J.M. (author), van Loosdrecht, Mark C.M. (author), Volcke, Eveline I.P. (author)
In the pursuit of reducing carbon footprint and in view of increasing energy prices, energy efficiency is more important than ever before. Batch-wise operated aerobic granular sludge reactors consume up to 50% less energy compared to conventional activated sludge systems because pumping energy is reduced and mixing equipment is not needed....
journal article 2023
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Piaggio, A.L. (author), Mittapalli, Srilekha (author), Calderon Franco, D. (author), Weissbrodt, D.G. (author), van Lier, J.B. (author), de Kreuk, M.K. (author), Lindeboom, R.E.F. (author)
This study investigates the effects, conversions, and resistance induction, following the addition of 150 μg·L<sup>−1 </sup>of two antibiotics, sulfamethoxazole (SMX) and trimethoprim (TMP), in a laboratory-scale micro-aerated anaerobic membrane bioreactor (MA-AnMBR). TMP and SMX were removed at 97 and 86%, indicating that micro-aeration did not...
journal article 2023
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Emeis, Ruben (author)
As part of the Dutch sustainable landfill project iDS, two compartments of the Dutch landfill Wieringermeer have been treated by in-situ aeration since 2017. The chosen method of aeration is over-extraction, where suction pressure is created causing ambient air to intrude into the landfill. Aeration induces enhanced settlement due to the...
master thesis 2022
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Arosquipa Nina, Yvan (author), Shi, Rui (author), Wüthrich, D. (author), Chanson, Hubert (author)
Self-aerated free-surface flow studies have a more recent history compared to classical fluid dynamics. Traditional velocimetry techniques are adversely affected by the presence of gas–liquid interfaces. In the present study, detailed air-water flow measurements were performed in a highly turbulent free-surface flow, and three velocimetry...
journal article 2022
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Meza Ramos, P.N. (author), Lammen, Hans (author), Cruz, Carmen (author), Heimovaara, T.J. (author), Gebert, J. (author)
In-situ aeration of landfills accelerates biodegradation of waste organic matter and hence advances waste stabilization. The spatial outreach of aeration greatly affects stabilization efficiency. This study analyzed the spatial variability of gas composition and flow in 230 wells spread over four compartments of a Dutch landfill which is...
journal article 2022
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Agostinho, Luewton L.F. (author), Pecnik, Rene (author), Woisetschläger, Jakob (author), de Kroon, Esther (author), Şişcanu, Nicolae (author), van de Griend, Maarten V. (author), Loiskandl, Willibald (author), Fuchs, Elmar C. (author)
Aeration is one of the most cost intensive steps in water and wastewater treatment due to the large energy requirement for the creation of large surfaces for sufficient gas exchange as well as for providing efficient liquid transport in order to exchange saturated liquid elements at the surface with unsaturated ones from the bulk. In this...
journal article 2022
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Nina, Yvan Arosquipa (author), Shi, Rui (author), Wüthrich, D. (author), Chanson, Hubert (author)
At hydraulic structures, some strong interactions may develop between fast flowing waters and the air adjacent to the water in motion that enhance the air-water transfer of atmospheric and volatile gases in the flow. In turn, in-stream structures may contribute to the aeration and re-oxygenation during overflow. The present study aims to...
journal article 2022
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Agung Kusumawardhana, Agung (author)
A reverse osmosis (RO) membrane followed by a packed tower aerator and rapid sand filter are used by an agricultural company in Emmen to treat brackish groundwater to supply water for growing crops and cleaning purposes. The iron removal by the treatment plant is sufficient most of the time throughout the year. However, the farmer periodically ...
master thesis 2021
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DONEPUDI, TEJA (author)
Experiments to characterise vortices in hyperbolic shaped funnels are being conducted at the Water Application Centre (WAC) in Wetsus. These have demonstrated their higher gas transfer rates in comparison to the conventional aeration systems presently in use. Depending on the imposed flow conditions, different regimes of...
master thesis 2021
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Bockstael, Marnix (author)
Marine structures can sustain damage due to violent wave impacts that are characterized by complex dynamics involving both water and air. Methods that predict impacts loads for structural design often assume the water as incompressible. These predictions can be inaccurate during impacts where air is entrained in water, as that greatly increases...
master thesis 2021
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van Turnhout, A.G. (author), Oonk, Hans (author), Scharff, Heijo (author), Heimovaara, T.J. (author)
In order to reduce the environmental and financial burden for future generations, approaches are needed to shorten aftercare of landfills. Aeration of the waste-body is a promising approach, however, the poor understanding of transport of gas and water through a waste-body makes it difficult to design an effective aeration strategy. The aim of...
journal article 2020
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Guleria, Tavishi (author)
This study aims to look at the effect of introducing controlled amounts of oxygen on biogas quantity and quality during anaerobic digestion. The anaerobic digestion process is studied, specifically, it’s biochemical processes, to understand the effect of addition of oxygen. Anaerobic sludge is aerated to mimic DAF (Dissolved Air Flotation)...
student report 2019
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van Dijk, Tim (author)
In 2013, Brabant Water (BW) adopted a new goal of &lt;1 μg/l for As level in the drinking water, resulting in the need to enhance As removal at seven water treatment plants (WPT’s), including WTP Prinsenbosch (As = 2.6 μg/l). Earlier experiences of BW at WTP Dorst had shown that dosing of NaMnO4 to an aeration-filtration system efficiently...
master thesis 2018
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van der Eijk, Martin (author)
A substantial part of structural damage for conventional vessels is caused by complex free surface events like slamming, breaking waves and green water. These events lead to the interaction of air and water where air can be entrained in water. The resulting air bubbles can considerably affect the evolution of the pressure caused by hydrodynamic...
master thesis 2018
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Bost, Vera (author)
Control of wastewater treatment plants has received more attention as a method to improve nutrient removal processes. Improved nutrient removal, results in an increased effluent quality, whilst minimising the energy consumption. Aeration control of oxidation ditches often focuses on adjusting the aeration intensity based on the nitrogen removal...
master thesis 2018
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van Turnhout, A.G. (author), Brandstätter, Christian (author), Kleerebezem, R. (author), Fellner, Johann (author), Heimovaara, T.J. (author)
Long-term emissions of Municipal Solid Waste (MSW) landfills are a burden for future generations because of the required long-term aftercare. To shorten aftercare, treatment methods have to be developed that reduce long-term emissions. A treatment method that reduces emissions at a lysimeter scale is re-circulation of leachate. However, its...
journal article 2018
Searched for: subject%3A%22Aeration%22
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