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Liu, G. (author), Tao, Yu (author), Zhang, Ya (author), Lut, M.C. (author), Knibbe, Willem Jan (author), van der Wielen, Paul (author), Liu, Wentso (author), Medema, G.J. (author), van der Meer, W.G.J. (author)Biofilm formation, loose deposit accumulation and water quality deterioration in drinking water distribution systems have been widely reported. However, the accumulation and distribution of harbored elements and microbes in the different niches (loose deposits, PVC-U biofilm, and HDPE biofilm) and their corresponding potential contribution to...journal article 2017
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Liu, Y. (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author)In this paper, the thick-level-set method is used to model stable and unstable (stick/slip) crack propagation in the dynamic double cantilever beam (DCB) test for unidirectional composite laminates. The thick-level-set method uses a predefined damage profile to describe the fracture process zone and allows<br/>for accurate evaluation of the...conference paper 2017
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Liu, G. (author), Zhang, Ya (author), van der Mark, E.J. (author), Magic-Knezev, Aleksandra (author), Pinto, Ameet (author), van den Bogert, Bartholomeus (author), Liu, Wentso (author), van der Meer, W.G.J. (author), Medema, G.J. (author)The general consensus is that the abundance of tap water bacteria is greatly influenced by water purification and distribution. Those bacteria that are released from biofilm in the distribution system are especially considered as the major potential risk for drinking water bio-safety. For the first time, this full-scale study has captured and...journal article 2018
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Liu, Y. (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author)The mode-I interlaminar fracture toughness of composite laminates under different loading rates can be measured by the double cantilever beam (DCB) test. It is observed from the DCB test of a unidirectional PEEK/carbon composite laminate that as the loading rate increases from quasi-static to dynamic range: (1) delamination crack growth...journal article 2018
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Sousi, Mohaned (author), Liu, G. (author), Salinas-Rodriguez, Sergio G. (author), Knezev, Aleksandra (author), Blankert, Bastiaan (author), Schippers, Jan C. (author), van der Meer, W.G.J. (author), Kennedy, M.D. (author)Ensuring the biological stability of drinking water is essential for modern drinking water supply. To understand and manage the biological stability, it is critical that the bacterial growth in drinking water can be measured. Nowadays, advance treatment technologies, such as reverse osmosis (RO), are increasingly applied in drinking water...journal article 2018
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Liu, Y. (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author)An asymptotic homogenization model considering wave dispersion in composites is investigated. In this approach, the effect of the microstructure through heterogeneity-induced wave dispersion is characterised by an acceleration gradient term scaled by a “dispersion tensor”. This dispersion tensor is computed within a statistically equivalent...journal article 2019
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Sousi, Mohaned (author), Salinas-Rodriguez, Sergio G. (author), Liu, G. (author), Schippers, Jan C. (author), Kennedy, M.D. (author), van der Meer, Walter (author)Measuring bacterial growth potential (BGP) involves sample pre-treatment and inoculation, both of which may introduce contaminants in ultra-low nutrient water (e.g., remineralized RO permeate). Pasteurization pre-treatment may lead to denaturing of nutrients, and membrane filtration may leach/remove nutrients into/from water samples....journal article 2020
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Liu, Y. (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author), Fan, J. T. (author)With a classical notched configuration, the damage process in the transverse plane of fiber-reinforced polymer composites are studied by a direct numerical simulation model (DNS). However, to avoid high computational costs the region in which the fiber/matrix microstructure is explicitly modeled must remain small. Therefore, away from the...journal article 2020
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Liu, G. (author), Zhang, Ya (author), Liu, X. (author), Hammes, Frederik (author), Liu, Wen Tso (author), Medema, G.J. (author), Wessels, Peter (author), van der Meer, W.G.J. (author)In the present study, triplicate rings of 360° pipe surfaces of an operational drinking water distribution pipe were swabbed. Each ring was equally divided into 16 parts for swabbing. The collected swabs were grouped into 3 sections and compared with the biofilm samples sampled by sonication of specimens from the same pipe. The results showed...journal article 2020
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Sousi, Mohaned (author), Liu, G. (author), Salinas-Rodriguez, Sergio G. (author), Chen, L. (author), Dusseldorp, Jos (author), Wessels, Peter (author), Schippers, Jan C. (author), Kennedy, M.D. (author), van der Meer, Walter (author)Although water produced by reverse osmosis (RO) filtration has low bacterial growth potential (BGP), post-treatment of RO permeate, which is necessary prior to distribution and human consumption, needs to be examined because of the potential re-introduction of nutrients/contaminants. In this study, drinking water produced from anaerobic...journal article 2020
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Chen, L. (author), Ling, Fangqiong (author), Bakker, Geo (author), Liu, Wen Tso (author), Medema, G.J. (author), van der Meer, W.G.J. (author), Liu, G. (author)Worldwide, it is common that the drinking water distribution systems (DWDSs) may be subjected to changes of supply water quality due to the needs of upgrading the treatment processes or switching the source water. However, the potential impacts of quality changed supply water on the stabilized ecological niches within DWDSs and the associated...journal article 2020
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Sousi, Mohaned (author), Salinas-Rodriguez, Sergio G. (author), Liu, G. (author), Dusseldorp, Jos (author), Kemperman, Antoine J.B. (author), Schippers, Jan C. (author), van der Meer, Walter G.J. (author), Kennedy, M.D. (author)The bacterial growth potential (BGP) of drinking water is widely assessed either by flow cytometric intact cell count (BGP<sub>ICC</sub>) or adenosine triphosphate (BGP<sub>ATP</sub>) based methods. Combining BGP<sub>ICC</sub> and BGP<sub>ATP</sub> measurements has been previously applied for various types of drinking water having high to low...journal article 2021
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Liu, Y. (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author), Ke, L. (author)The mode-I dynamic fracture energy and failure mechanisms of glass fiber-reinforced polymer composites are investigated with an embedded cell model of the single-edge-notched-tension (SENT) geometry. Under an applied dynamic loading, a crack may propagate in the embedded microstructure, accompanied by the development of a fracture process...journal article 2021
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Chen, L. (author), Zhai, Y. (author), van der Mark, Ed (author), Liu, G. (author), van der Meer, Walter (author), Medema, G.J. (author)Slow sand filters (SSFs) are widely applied to treat potable water; the removal of contaminants (e.g., particles, organic matter, and microorganism) occurs primarily in the top layer. However, the development of the microbial community and its metabolic function is still poorly understood. In the present study, we analyzed the microbial...journal article 2021
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Zhai, Yujia (author), Liu, G. (author), van der Meer, Walter G.J. (author)The presence of newly emerging pollutants in the aquatic environment poses great challenges for drinking water treatment plants. Due to their low concentrations and unknown characteristics, emerging pollutants cannot be efficiently removed by conventional water treatment processes, making technically, economically, and environmentally...journal article 2022
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Chen, L. (author), Li, Xuan (author), van der Meer, Walter (author), Medema, G.J. (author), Liu, G. (author)The aperiodic changes in the quantity and community of planktonic and particle-associated bacteria have hampered the understanding and management of microbiological water quality in drinking water distribution systems. In this study, online sampling was combined with the microbial fingerprint-based SourceTracker2 to capture and trace the...journal article 2022
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Fang, Jiaxing (author), Dai, Zihan (author), Li, Xiaoming (author), van der Hoek, J.P. (author), Savić, Dragan (author), Medema, G.J. (author), van der Meer, Walter (author), Liu, G. (author)Biofilm detachment contributes to water quality deterioration. However, the contributions of biofilm detachment from different pipes have not been quantified or compared. Following the introduction of partial reverse osmosis (RO) in drinking water production, this study analyzed particles at customers’ ends and tracked their origins to water...journal article 2023
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Yao, Mingchen (author), Zhang, Yue (author), Dai, Zihan (author), Ren, Anran (author), Fang, Jiaxing (author), Li, Xiaoming (author), van der Meer, Walter (author), Medema, G.J. (author), Rose, Joan B. (author), Liu, Gang (author)Premise plumbing plays an essential role in determining the final quality of drinking water consumed by customers. However, little is known about the influences of plumbing configuration on water quality changes. This study selected parallel premise plumbing in the same building with different configurations, i.e., laboratory and toilet...journal article 2023
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Wang, Xintu (author), Xu, Yanghui (author), Ou, Q. (author), Chen, Wenwen (author), van der Meer, W.G.J. (author), Liu, G. (author)The excessive use and accumulation of water-soluble polymers (WSPs, known as “liquid plastics”) in the environment can pose potential risks to both ecosystems and human health, but the environmental fate of WSPs remains unclear. Here, the adsorption behavior of WSPs with different molecular weight on kaolinite (Kaol) and montmorillonite (Mt)...journal article 2024