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Nanda, Rahul (author)Gasketed Plate Heat Exchangers (GPHEs) are a sub-class of heat exchangers that enable heat transfer between 2 fluids via metal plates. A common problem encountered in all heat exchangers is fouling. Fouling can be described as the deposition and accumulation of unwanted materials such as scale, algae, suspended solids and insoluble salts on a...master thesis 2023
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Yuvaraj, Ananya (author)Lignocellulose is an abundant source of feedstock and consists of hemicellulose, cellulose, and lignin. Pre-treatment is done to fragment lignin and hydrolyse the hemicellulose and cellulose fractions into simple sugars which is then converted into bioplastics. The pre-treatment generates a mix of sugar solutions, lignin breakdown products and...master thesis 2023
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Zhou, Hanxiao (author)Constant flux MF/UF filtration is preferred in real-world applications because it <br/>provides more consistent permeate flow rates than fixed transmembrane pressure studies. Particularly, little is understood about the fouling of ceramic membranes in constant flux filtration modes by nano-sized O/W emulsions. In this study, the effects of...student report 2023
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Wang, Keyang (author)Ceramic ultrafiltration is a promising technology for water reclamation, but issues with membrane fouling and the removal of organic micro-pollutants have limited its development. Recent research has shown that catalysis-based ultrafiltration has the potential to address these problems. In this study, catalysis-modified (CuFe2O4 and Pd)...master thesis 2023
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Ruiter, Niels (author)The influence of surface roughness and shape on the submerged floating tunnel is investigated in wave and current conditions. The hydraulic forces caused by varying tunnel shapes and roughness designs are measured and analyzed.master thesis 2023
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Abunada, M.B.M. (author), Dhakal, Nirajan (author), Gulrez, Raffay (author), Li, L. (author), Abushaban, Almotasembellah (author), Smit, Herman (author), Moed, David (author), Ghaffour, Noreddine (author), Kennedy, M.D. (author)This study aims at applying and verifying the MFI-UF method to predict particulate fouling in RO plants. Two full-scale RO plants treating surface water, with average capacity of 800–2000 m<sup>3</sup>/h, were studied. Firstly, the MFI-UF of RO feed and concentrate was measured using 5–100 kDa membranes at same flux applied in the RO plants ...journal article 2023
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Zou, P. (author), Ruiter, N. (author), Bricker, J.D. (author), Uijttewaal, W.S.J. (author)The effects of surface roughness as induced by marine fouling on the hydrodynamic forces on a submerged floating tunnel (SFT) are experimentally and numerically investigated in detail at Reynolds numbers Re = 8.125 × 10<sup>3</sup>–5.25 × 10<sup>4</sup>. A sensitivity analysis to different roughness parameters including roughness height,...journal article 2023
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Abunada, M.B.M. (author), Dhakal, Nirajan (author), Andyar, William Z. (author), Li, Yuke (author), Ajok, Pamela (author), Ghaffour, Noreddine (author), Schippers, Jan C. (author), Kennedy, M.D. (author)This study aimed to calibrate and validate the MFI-UF method in order to ensure the accuracy of particulate fouling measurements in RO. Firstly, the MFI-UF calibration was examined using two solutions of standard particles (dextran and polystyrene). Two main criteria were investigated: (i) MFI-UF linearity with particle concentrations at both...journal article 2023
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Cruz, María Alejandra (author), Xu, Jiaqi (author), Foppen, J.W.A. (author), Pérez, Sandra (author), Vázquez-Suñé, Enric (author), Teixidó, Marc (author)Green infrastructure drainage systems are innovative treatment units that capture and treat stormwater. Unfortunately, highly polar contaminants remain challenging to remove in conventional biofilters. To overcome treatment limitations, we assessed the transport and removal of stormwater vehicle-related organic contaminants with persistent,...journal article 2023
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Kim, S. (author), Curko, Josip (author), Matosic, Marin (author), Herrera, Aridai (author), Lopez-Vazquez, Carlos M. (author), Brdjanovic, Damir (author), Garcia, H. (author)To investigate the influence of high-pressure and shear effects introduced by a concentrated oxygen supply system on the membrane filtration performance, a laboratory-scale membrane bioreactor (MBR) fed artificial municipal wastewater was operated continuously for 80 days in four phases equipped with different aerations systems: (P1) bubble...journal article 2023
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Begall, Moritz J. (author), Schweidtmann, A.M. (author), Mhamdi, Adel (author), Mitsos, Alexander (author)Computational Fluid Dynamics (CFD) is a powerful tool which can help with the geometry optimization of continuous milli-scale reactors, which often are highly complex devices. Attempting to perform this optimization by manually modifying and testing geometry configurations can however be tedious and computationally inefficient. Addressing...journal article 2023
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Shi, Can (author), Fan, Zheng (author), Connolly, David P. (author), Jing, Guoqing (author), Markine, V.L. (author), Guo, Y. (author)Railway ballast performance is dictated by a complex mix of mechanical properties. These effect its performance at the particle level for example in terms of particle degradation, but also at the track system level in terms of settlement and stability. Therefore this paper seeks to develop new understandings of ballast behaviour and identify...review 2023
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Yan, Bin (author), Vogt, Sarah J. (author), Blankert, Bastiaan (author), Vrouwenvelder, J.S. (author), Johns, Michael L. (author), Fridjonsson, Einar O. (author)Early fouling warning is important for the economical operation of membrane separation systems. In parallel multi-channel flow systems, flow re-distribution between channels due to fouling is often associated with maloperation. In the current research we use low magnetic field NMR to monitor multi-fiber hollow fiber membrane modules...journal article 2023
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Koohmishi, Mehdi (author), Guo, Y. (author)The occurrence of ballast contamination or fouling frequently results in a sudden decline in the capacity of railway ballasted tracks. Considering the various sources of ballast fouling, clay is the most severe one for causing a drastic reduction in the drainage capacity of the ballast layer. In the current study, we utilized a large-scale...journal article 2023
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Zou, P. (author), Ruiter, N. (author), Uijttewaal, W.S.J. (author), Chen, X. (author), Peters, D.J. (author), Bricker, J.D. (author)Marine biofouling is a major concern in the operational performance of submerged floating tunnels (SFTs). The objective of this research is to investigate the effects of marine fouling (represented by surface roughness) on the hydrodynamic behavior of SFTs, including the hydrodynamic forces on the SFT subject to current-only, wave-only, and...journal article 2023
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Khoshnood, Alireza (author), Maerefat, Mehdi (author), Imani, Gholamreza (author), Hooman, K. (author)Exhaust gas recirculation (EGR) systems have been successfully employed to reduce the NOx emissions in diesel engines. However, the fouling problem in EGR coolers challenges their capability to comply with stringent environmental regulations. A few numerical simulations have considered the fouling growth in EGR coolers. Those studies modeled...journal article 2023
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Adsorption and cake layer fouling in relation to Fenton cleaning of ceramic nanofiltration membranesLin, B. (author), Rietveld, L.C. (author), Yao, Lu (author), Heijman, Sebastiaan (author)Catalytic ceramic nanofiltration (NF) is a promising technology for direct wastewater reclamation, given its high separation selectivity and reactive surfaces for oxidative removal of fouling. A better understanding of the relation between fouling types and oxidative cleaning efficacy under high organic loading conditions is of practical...journal article 2023
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Xu, Yidan (author)Water scarcity and uneven distribution of water resources pose a significant challenge globally. Searching for alternative water resources could alleviate this issue. Municipal sewage reclamation with ceramic NF membrane has gained momentum nowadays. However, the inevitable fouling, especially organic fouling during membrane filtration, is the...master thesis 2022
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Vis, Anna (author)In this study simultaneous and continuous inline dosing of PAC and coagulant in UF was investigated. Surface water was directly treated with PAC-UF and performance of the system was assessed by looking at membrane fouling and organic micropollutants removal. Combining adsorption and membrane processes in one technique, hybrid membrane processes,...master thesis 2022
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Ophorst, Marleen (author)The aim of this research was to evaluate the feasibility of direct hollow fiber nanofiltration membranes for drinking water purposes. The experiments were performed on the dNF40 pilot provided by NXF. The fouling potential and the ion retention of the dNF40 pilot were determined by continuous filtration experiments using raw IJssellake water...master thesis 2022