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Wingelaar, Sander (author)
This research addresses the critical issue of the poor implementation of sanitation and its effect on community and environmental health in the Global South. To overcome the social, cultural, technical, and financial complexities underlying poor sanitation, the participation of local community members in sanitation planning processes is deemed...
master thesis 2023
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Thiruvenkatachari, Priyadarshini (author)
Elevated levels of ammonia in discharged water leads to eutrophication and potential toxicity in water bodies. To combat nitrogen pollution, strict ammonium discharge limits of 1 mgNH<sub>4</sub>-N/L standard is set by the water framework directory. In many cases, current wastewater treatment facilities struggle to consistently meet this...
master thesis 2023
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Li, Linghang (author)
Poly-hydroxy-alkanoate (PHA) is an intracellular polymer that can be used as an energy and carbon source by microorganisms. Measuring PHA is important for understanding the microbial metabolism of enhanced biological phosphorus removal (EBPR) and aerobic granular sludge (AGS) systems. There is a commonly used method to measure PHA, which is...
student report 2023
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Li, Linghang (author)
Aerobic granular sludge (AGS) is an innovative biotechnology extensively applied for treating municipal wastewater, and it can potentially treat sugar industry wastewater. Glucose is a prevalent substrate in sugar industry wastewater; nevertheless, the effect of glucose on AGS systems remains unexplored. In this study, an AGS reactor using...
master thesis 2023
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van der Loos, Luke (author)
Improving circularity and reducing greenhouse gas emissions can be achieved by utilizing secondary streams like Fischer-Tropsch biosludge, which is typically disposed of in landfills. Biochar, which has accumulated increased interest recently, has significant potential for decreasing carbon emissions and can be created from biosludge. This...
master thesis 2023
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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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van Egmond, Jessie Lynn (author)
For this thesis a hydrochemical groundwater survey was carried out on the Caribbean island of Curaçao in 2020 as part of the NWO SEALINK project. In order to be well-adapted against anthropogenic and natural pressures, Curaçao needs representative data, yet thorough hydrochemical datasets were only sparsely collected in the wet seasons of 1977...
master thesis 2023
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Tang, Anita (author)
Since its production concentrations of the manmade chemical compounds PFAS found in the environment has increased significantly. The properties created by incorporating these chemicals, make them attractive for industrial usage and for many consumer products. These chemicals bioaccumulate and are very persistent. With known adverse health...
student report 2023
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Kannan, Thanisha (author)
Being one of the oldest water treatment systems in the world, slow sand filters (SSFs) have played a big role in the water treatment sector due to their reliability and their effective physico-chemical and biological purification capabilities. They are still widely used as a disinfection step in many countries, especially those that do not use...
master thesis 2022
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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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Verloo, Helena (author)
The Good Roll, a company based in Amsterdam, produces 100% tree-friendly and sustainable toilet paper. Half of their profit goes to their foundation, building toilet facilities all over Ghana, called The Good Toilet. With the concept of The Good Toilet, they want to provide access to sanitation for all Ghanaians, with an economically viable...
student report 2022
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Lyu, Haozheng (author)
Fine sieved fraction (FSF) is a solid waste generated from wastewater treatment plants (WWTPs). Cellulose fiber is the most important component of FSF, which can be fermented into volatile fatty acids (VFAs) and then be used as carbon sources in biological nutrient removal (BNR). This thesis measured and evaluated the aerobic &amp; anaerobic...
master thesis 2022
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Nederveen, Tim (author)
Environmental guidelines (EU WFD) impose a strict effluent phosphate target on wastewater treatment plants (WWTP). An abundance of phosphate (and other nutrients) in a water body is called eutrophication. Eutrophication can lead to algal blooms which result in very low oxygen concentrations in the water. Other species, like fish and aquatic...
master thesis 2022
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Wang, Sihan (author)
Anaerobic digestion (AD) is an effective and economical in secondary sludge management. Thermal hydrolysis process (THP) is a reliable pre-treatment method to improve the biodegradability of sludge. Partial nitritation and anammox process (PN/A) is a suitable method used to remove nitrogen in reject water which has a low COD/N ratio. However,...
master thesis 2022
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Schoenmakers, Joris (author)
Due to the increasing impact of terrestrial agriculture on climate change, the attention of a myriad of industries is shifting towards the use of alternative, low-emission resources. Seaweed cultivation has presented itself as a contribution to the mitigation of the increased pressure on current resources. However, coastal and offshore marine...
master thesis 2022
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WANG, Zhouyuan (author)
Thermal hydrolysis (TH) has been widely applied to sewage sludge treatment to improve downstream anaerobic digestion (AD) by enhancing organic solids hydrolysis and subsequent biogas productivity. However, TH also has several drawbacks, including the formation of recalcitrant compounds, which are anaerobically non-biodegradable and even...
master thesis 2022
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Durry, Sebastian (author)
The hydrolysis of sludge solids especially for difficultly degradable sludges such as WAS is not fully understood, yet. The first-order hydrolysis rate was shown to function well for most easily degradable sludges and soluble substrates. This description for substrate hydrolysis in the context of anaerobic digestion has the benefit of being very...
master thesis 2022
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Phukan, Maitry (author)
Groundwater is a major source of drinking water containing various elements out of which arsenic(As) is one of the toxic elements present. It is present in the form of arsenite, Conventionally, As(III) can be effectively removed if it is pre-oxidized to arsenate, As(V), thereby not involving any chemical dosage. There are various techniques to...
student report 2022
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Sarah Jacob, Sarah (author)
Dormancy is a topic that is researched extensively for various microorganisms, especially in the field of medicine. However, not many studies have been conducted for the dormancy of microorganisms in the wastewater treatment sector. Treatment processes like the NEREDA® technology use Phosphate Accumulating Organisms (PAO) to remove phosphate...
master thesis 2021
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Spit, Tiza (author)
As antibiotics now save millions of human and animal lives annually, the World Health Organisation (WHO, 2019) declared Antibiotic Resistance (AR) as the number five most dangerous risk to global health. Several researchers mention WWTPs to be an important source for AR as the growth of bacteria is stimulated in an environment with a selective...
master thesis 2021
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