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Gonzales, A. (author)The overall objective of the present study was to investigate the effects of thermal pre-treatment of waste activated sludge (WAS) at 70 °C with addition of H<sub>2</sub>O<sub>2</sub> to enhance sludge hydrolysis and subsequent methane production during WAS anaerobic digestion. The research was divided into four parts: Firstly, a bibliographical...doctoral thesis 2022
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Ceron Chafla, P.S. (author)Anaerobic processes such as Anaerobic Digestion (AD) and mixed culture fermentation (MCF) are important technologies in the bioeconomy context since they can be used to convert (waste) biomass feedstock into gaseous energy carriers and chemical commodities, theoretically without the use of any additional energy source. AD is a multi-step...doctoral thesis 2022
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van Linden, N. (author)Ammonia (NH3) is one of world’s most-produced chemicals and is mostly used as a raw resource for fertilisers. From the used NH3-based fertilisers, almost half of the NH3 ends up in receiving water bodies, leading to eutrophication, eventually resulting in species diversity loss in the aquatic environment. To minimise environmental damage, total...doctoral thesis 2022
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Odriozola, Magela (author)Anaerobic membrane bioreactor (AnMBR) technology is increasingly researched for wastewater treatment in a circular economy scenario to recover nutrients, water, and biogas. AnMBR couples the advantages of anaerobic digestion, such as low sludge production, no aeration requirement and biogas production, with the benefits of membrane technology,...doctoral thesis 2022
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Muñoz Sierra, Julian (author)Industrial wastewaters generated in chemical industries are often characterized by extreme conditions, such as the presence of complex, recalcitrant, and toxic aromatic compounds, high temperature, and high salinity. The mentioned conditions predominantly occur when chemical industries reduce process water use or strive for closing water loops....doctoral thesis 2022
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Wei, P. (author)Excess sludge handling is as important as treating the wastewater in determining the operational performance and costs in modern municipal wastewater treatment plants (WWTPs). In practice, excess sludge handling is widely implemented using anaerobic digestion (AD), in which the organic matter inside the sludge is not only stabilised and partly...doctoral thesis 2021
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de Valk, S.L. (author)The overall objective of this thesis was to investigate ways to improve the extent and rate of waste activated sludge (WAS) hydrolysis by researching the WAS degrading activities and mechanisms of the aquatic worm Tubifex tubifex (T. tubifex) as a starting point. The WAS degrading aquatic worms were taken as a model “biochemical reactor” of...doctoral thesis 2021
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Riungu, J. (author)Globally, 2.7 billion people are using onsite sanitation systems, particularly in low income, high density settlements (LIHDS) in urban areas of developing countries. However, treatment technologies to manage the faecal sludge (FS) generated from these systems are often not in place, leading to high risks for environmental and public health. The...doctoral thesis 2021
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Kooijman, G. (author)Organic flocculants are typically only applied in the sludge line and sometimes in quaternary treatment of conventional sewage treatment plants (STPs) that aim for enhanced nutrient removal. However, with the ongoing societal changes directing towards a higher degree of circularity of resources and a higher degree of wastewater treatment demands...doctoral thesis 2020
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Thota Radhakrishnan, A.K. (author)Domestic wastewater streams from households implemented with source separation, vacuum toilets, and food waste disposers are highly concentrated with respect to the total suspended solids. The concentrated domestic slurries (CDS), which generally consist of faecal matter, urine, ground kitchen waste (GKW) and water, need to be transported from...doctoral thesis 2019
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Zahmatkesh, M. (author)In order to address the ambiguities and knowledge gaps in the HA removal by WRF, mechanisms of removal were explored in chapter 2. It was shown that the mechanisms of HA removal by WRF involves the degradation of HA to smaller molecules, conversion to FA and also biosorption of HA by fungal mycelia. Furthermore, the ability of laccase to...doctoral thesis 2018
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Sanchez Guilen, J.A. (author)On a global scale, sewage represents the main point-source of water pollution and is also the predominant source of nitrogen contamination in urban regions. The present research is focused on the study of the main challenges that need to be addressed in order to achieve a successful inorganic nitrogen post-treatment of anaerobic effluents in the...doctoral thesis 2016
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Ghasimi, D.S.M. (author)Fine sieves can be implemented as compact alternatives to primary clarification. Fine sieved fraction (FSF) is a heterogeneous substrate that mainly consists of fibers originating from toilet paper and thus contains a high cellulosic fraction. Resource recovery and energy neutral sewage treatment is nowadays focus of many water authorities. This...doctoral thesis 2016
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Özgün, H. (author)In recent years, anaerobic membrane bioreactor (AnMBR) technology has been increasingly researched for municipal wastewater treatment as a means to produce nutrient-rich, solids free effluents with low levels of pathogens, while occupying a small footprint. An AnMBR can be used not only for on-site wastewater treatment, but also for the...doctoral thesis 2015
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Dereli, R.K. (author)The success of anaerobic digestion relies on the presence of highly active methanogenic biomass, requiring effective retention of slow growing anaerobic microorganisms inside bioreactor by decoupling the hydraulic retention time (HRT) from solids residence time (SRT) or the employment of long SRTs in fully mixed systems. So far, flow through...doctoral thesis 2015
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Erşahin, M.E. (author)Anaerobic membrane bioreactors (AnMBRs) physically ensure biomass retention by the application of a membrane filtration process. With growing application experiences from aerobic membrane bioreactors (MBRs), the combination of membrane and anaerobic processes has received much attention and become more attractive and feasible, due to advantages...doctoral thesis 2015
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- Zhang, X. (author) doctoral thesis 2014
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- Yang, J. (author) doctoral thesis 2013
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Krzeminski, P. (author)Despite continuous developments in the field of MBR technology, membrane fouling together with the associated energy demand and related costs issues remain major challenges. The efficiency of the filtration process in an MBR is governed by the activated sludge filterability, which is still limitedly understood and is determined by the...doctoral thesis 2013