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Bravenboer, Bart (author), Bulte, Sergio (author), Helmich, Max (author), Knoop, Job (author), Neijenhuis, Ole (author), Wolf, Marijn (author)Growing concerns about elevated nitrate levels in natural springs on the southern slope of the Irazu Volcano, Cartago province in Costa Rica, were the driving force for a multi-disciplinary study on the problem. The region is characterized by its high agricultural output and steep slopes. More than sixty springs located in the area are managed...student report 2023
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Heegstra, Sjoerd (author)Interest in biogas has increased due to natural gas shortages and the energy transition. Most digesters in the EU have internal heating for process stability. Unheated reactors could potentially lower costs, but have decreased kinetics due to low operational temperatures, especially in winter. This raises the question how seasonal temperature...master thesis 2022
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Au, Hong Ting (author)A novel activated carbon-iron composite material has been developed as an adsorbent for water treatment. Due to its activated carbon (AC) content, the material could be used to remove pollutants such as organic micropollutants (OMP). Fast AC bed exhaustion makes adsorption a cost-intensive solution. Regeneration of AC is done off-site and...master thesis 2022
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Berenschot, Bastijn (author), Blok, Jesse (author), Gielen, Christiaan (author), Hammecher, Simon (author), Pierik, Laurens (author)Irmão is a beach restaurant located in the region of Lisbon in Portugal and has been taken over by the new owners one year ago. Since the takeover, the owners of Irmão have been trying to work in a sustainable way, but there is always room for improvement. In addition, Irmão may have to move 100 metres inland due to a possible change in local...student report 2021
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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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van Nes, Gijs (author)Many cities in Sub-Saharan Africa struggle to access reliable and adequate quantities of potable water for diverse water requirements. Under pressure of climatic change, urbanization and economic development, freshwater resources are becoming scarcer. These pressures combined with outdated infrastructure, pose a giant challenge to the Greater...master thesis 2021
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de Wit, Fleur (author)The aim of the research is to aid selection of Household Water Treatment and Storage (HWTS) technologies. By creating an overview of important criteria for choosing between HWTS in a certain context, information on trade-offs is gathered. To do so, an explorative assessment is made of HWTS preferences in various contexts.master thesis 2021
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YAO, Lu (author)Ceramic nanofiltration (NF) is a newly developed technology for municipal sewage reclamation for drinking water production, agricultural and industrial utilisation, but organic fouling limits it to pilot-scale application. Herein, Fenton-based cleaning catalysed by FeOCl pre-coat was performed on ceramic NF membrane to clean persistent gel-like...master thesis 2020
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Flambouris, Stelios (author)Arsenic in groundwater can constitute a persistent nuisance for water treatment facilities when it exceeds the admissible limit of 10 μg/L. Recently, a stricter limit has been set as a new challenging target by many companies in the Netherlands, which is below 1 μg/L. However, most of the groundwater treatment plants have been conventionally...student report 2020
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Roy, Mrinal (author)Human exposure to the toxic element arsenic due to consumption of arsenic contaminated water is still a global issue worldwide. Conventional treatment techniques are not very efficient at removing arsenite, which is the predominant species of arsenic in raw groundwater. Biological oxidation of arsenite by arsenic oxidizing bacteria (AsOB) has...master thesis 2019
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Floriana Ayumurti Kukuh, Ayu (author)In drinking water production, natural organic matter (NOM) is sometimes removed using ion exchange (IEX) resin. This treatment method has a limitation based on the exchanging capacity on the resin. Therefore, the resin needs to be regenerated when it is saturated with adsorbed NOM which leads to the production of brine. In general, NaCl is used...master thesis 2019
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- Versteeg, Pim (author), Tjia, Jacintha (author), Demetriades, Valerie (author), Caspers, Jochem (author) student report 2019
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Floriana Ayumurti Kukuh, Ayu (author)The quality of treated drinking water in the distribution network might deteriorate even though the quality of water leaving the treatment plant has been set to be at the highest level. Regrowth of microorganisms or known as microbiological instability is found to be one of the responsible causes for the change of the water quality. This...student report 2019
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Feng, Liying (author)Natural Organic Matter (NOM) is always present in the drinking water sources such as rivers, lakes and reservoirs. It causes several problems, including the unfavourable colour and odour of water, formation of disinfectant by-products and harmful microbial growth. In drinking water treatment, anion exchange (anion-IEX) is used for NOM removal....master thesis 2018
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Fajar Muhammad Rahman, F. (author)The new concept of sewer mining which utilizes the ceramic nanofiltration (C-NF) membranes offers a compact solution for water and other resources recovery. However, since it has very limited pre-treatment process, membrane fouling is a common problem due to the direct contact between the membrane and sewage water. Sewage water contains a lot of...master thesis 2018
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- Huijzendveld, T. (author) master thesis 2017
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Schep, B.A. (author), Roor, A.M. (author), Rottink, M.E. (author), Spielmann, P. (author), Waqué, A.E. (author), Van de Zande, B.J. (author)Ladysmith, a small city in KwaZulu-Natal (South Africa) had to deal with severe floods in the past. To prevent the city against floods like this, the Ladysmith Flood Protection Scheme was implemented in 1998. After the implementation of this scheme, there were still some floods. The goal of this project is to identify the causes of the floods...student report 2016
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Geul, K.R.A. (author)The well field in Noardburgum has been closed since the year 1993, due to the salinization of the groundwater. Upconing and lateral attraction of brackish groundwater caused the salinization of the groundwater. Currently, Vitens is looking for ways to reinstate the Noardburgum well field without the risk of salinization. The Fresh Keeper is...master thesis 2016
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Heinsbroek, A.R. (author)Nano Filtration (NF) is an advanced treatment process that is able to remove molecules and ions from water using special, synthetic, membrane modules. Under high pressure the so– called feed water enters the membrane module. Part of the water, the permeate, passes through the membrane wall while the rejected ions and molecules are flushed out...master thesis 2016
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Van Linden, N. (author)In the application of the Zero Liquid Discharge (ZLD) strategy, not a single drop of water leaves the waste water treatment plant (WWTP). In the recovery strategy of an actual full-scale ZLD WWTP, the focus lies on high quality water, which is fully recovered from reverse osmosis brine (RO-brine). A residual solid stream is generated and...master thesis 2016