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Photo-oxidation of Micro-and Nanoplastics

Physical, Chemical, and Biological Effects in Environments

Review - Yanghui Xu, Yanghui Xu, Q. Ou, Q. Ou, J.P. van der Hoek, J.P. van der Hoek, G. Liu, G. Liu, K.M. Lompe

Micro- and nanoplastics (MNPs) are attracting increasing attention due to their persistence and potential ecological risks. This review critically summarizes the effects of photo-oxidation on the physical, chemical, and biological behaviors of MNPs in aquatic and terrestrial envi ...

Multi-parametric assessment of biological stability of drinking water produced from groundwater

Reverse osmosis vs. conventional treatment

Journal article - Mohaned Sousi, Mohaned Sousi, G. Liu, G. Liu, Sergio G. Salinas-Rodriguez, L. Chen, Jos Dusseldorp, Peter Wessels, Jan C. Schippers, M.D. Kennedy, M.D. Kennedy, Walter G.J. van der Meer, Walter G.J. van der Meer

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/contamina ...

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 groundwater by RO and post-treatment (ion exchange, calcite contactors, and aeration) was compared with that produced by conventional treatment comprising (dry) sand filtration, pellet softening, rapid sand filtration, activated carbon filtration, and UV disinfection. The multi-parametric assessment of biological stability included bacterial quantification, nutrient concentration and composition as well as bacterial community composition and diversity. Results showed that RO permeate remineralised in the laboratory has an extremely low BGP (50 ± 12 × 103 ICC/mL), which increased to 130 ± 10 × 103 ICC/mL after site post-treatment. Despite the negative impact of post-treatment, the BGP of the finished RO-treated water was >75% lower than that of conventionally treated water. Organic carbon limited bacterial growth in both RO-treated and conventionally treated waters. The increased BGP in RO-treated water was caused by the re-introduction of nutrients during post-treatment. Similarly, OTUs introduced during post-treatment, assigned to the phyla of Proteobacteria and Bacteroidetes (75–85%), were not present in the source groundwater. Conversely, conventionally treated water shared some OTUs with the source groundwater. It is clear that RO-based treatment achieved an extremely low BGP, which can be further improved by optimising post-treatment, such as using high purity calcite. The multi-parametric approach adopted in this study can offer insights into growth characteristics including limiting nutrients (why) and dominating genera growing (who), which is essential to manage microbiological water quality in water treatment and distribution systems.@en

Effect of residual H2O2 from advanced oxidation processes on subsequent biological water treatmen

A laboratory batch study

Journal article - F. Wang, D. van Halem, G. Liu, G. Liu, K. Lekkerkerker, J.P. van der Hoek, J.P. van der Hoek

H2O2 residuals from advanced oxidation processes (AOPs) may have critical impacts on the microbial ecology and performance of subsequent biological treatment processes, but little is known. The objective of this study was to evaluate how H2O2 residuals influence sand systems with ...

Assessing the transition effects in a drinking water distribution system caused by changing supply water quality

An indirect approach by characterizing suspended solids

Journal article - L. Chen, L. Chen, Fangqiong Ling, Geo Bakker, Wen Tso Liu, G.J. Medema, G.J. Medema, W.G.J. van der Meer, W.G.J. van der Meer, G. Liu, G. Liu

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 ...

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 water quality deterioration risks were poorly documented. In the present study, such transition effects caused by changing the supply water quality that resulted from destabilization of biofilm and loose deposits in DWDS were investigated by analyzing the physiochemical and microbiological characteristics of suspended particles before (T0), during (T3-weeks) and after upgrading the treatments (T6-months) in an unchlorinated DWDS in the Netherlands. Our results demonstrated that after 6 months’ time the upgraded treatments significantly improved the water quality. Remarkably, water quality deterioration was observed at the initial stage when the quality-improved treated water distributed into the network at T3-weeks, observed as a spike of total suspended solids (TSS, 50–260%), active biomass (ATP, 95–230%) and inorganic elements (e.g. Mn, 130–250%). Furthermore, pyrosequencing results revealed sharp differences in microbial community composition and structure for the bacteria associated with suspended particles between T0 and T3-weeks, which re-stabilized after 6 months at T6-months. The successful capture of transition effects was especially confirmed by the domination of Nitrospira spp. and Polaromonas spp. in the distribution system at T3-weeks, which were detected at rather low relative abundance at treatment plant. Though the transitional effects were captured, this study shows that the introduction of softening and additional filtration did not have an effect on the water quality for the consumer which improved considerably after 6-months’ period. The methodology of monitoring suspended particles with MuPFiSs and additional analysis is capable of detecting transitional effects by monitoring the dynamics of suspended particles and its physiochemical and microbiological composition.@en

Microplastics in terrestrial ecosystem

Exploring the menace to the soil-plant-microbe interactions

Review - Yujia Zhai, Junhong Bai, Pengfei Chang, Pengfei Chang, Zhe Liu, Yaqi Wang, G. Liu, G. Liu, G. Liu, Baoshan Cui, Willie J.G.M. Peijnenburg, Willie J.G.M. Peijnenburg, Martina G. Vijver

Microplastics (MPs), miniscule plastic particles measuring less than 5 mm in size, have become a concern in terrestrial ecosystems, with primarily agricultural and wetland soils being the soils with highest plastic loadings. The adverse effect of MPs might lead to changes in phys ...

Microplastics in terrestrial ecosystem

Exploring the menace to the soil-plant-microbe interactions

Review - Yujia Zhai, Junhong Bai, Pengfei Chang, Pengfei Chang, Zhe Liu, Yaqi Wang, G. Liu, G. Liu, G. Liu, Baoshan Cui, Willie J.G.M. Peijnenburg, Willie J.G.M. Peijnenburg, Martina G. Vijver

Microplastics (MPs), miniscule plastic particles measuring less than 5 mm in size, have become a concern in terrestrial ecosystems, with primarily agricultural and wetland soils being the soils with highest plastic loadings. The adverse effect of MPs might lead to changes in phys ...

Potential impacts of changing supply-water quality on drinking water distribution

A review

Review - G. Liu, G. Liu, Ya Zhang, Willem Jan Knibbe, C. Feng, Wen Tso Liu, G.J. Medema, G.J. Medema, W.G.J. van der Meer, W.G.J. van der Meer

Driven by the development of water purification technologies and water quality regulations, the use of better source water and/or upgraded water treatment processes to improve drinking water quality have become common practices worldwide. However, even though these elements lead ...

Potential impacts of changing supply-water quality on drinking water distribution

A review

Review - G. Liu, G. Liu, Ya Zhang, Willem Jan Knibbe, C. Feng, Wen Tso Liu, G.J. Medema, G.J. Medema, W.G.J. van der Meer, W.G.J. van der Meer

Driven by the development of water purification technologies and water quality regulations, the use of better source water and/or upgraded water treatment processes to improve drinking water quality have become common practices worldwide. However, even though these elements lead ...

Potential impacts of changing supply-water quality on drinking water distribution

A review

Review - G. Liu, G. Liu, Ya Zhang, Willem Jan Knibbe, C. Feng, Wen Tso Liu, G.J. Medema, G.J. Medema, W.G.J. van der Meer, W.G.J. van der Meer

Driven by the development of water purification technologies and water quality regulations, the use of better source water and/or upgraded water treatment processes to improve drinking water quality have become common practices worldwide. However, even though these elements lead ...

Potential impacts of changing supply-water quality on drinking water distribution

A review

Review - G. Liu, G. Liu, Ya Zhang, Willem Jan Knibbe, C. Feng, Wen Tso Liu, G.J. Medema, G.J. Medema, W.G.J. van der Meer, W.G.J. van der Meer

Driven by the development of water purification technologies and water quality regulations, the use of better source water and/or upgraded water treatment processes to improve drinking water quality have become common practices worldwide. However, even though these elements lead ...

Potential impacts of changing supply-water quality on drinking water distribution

A review

Review - G. Liu, G. Liu, Ya Zhang, Willem Jan Knibbe, C. Feng, Wen Tso Liu, G.J. Medema, G.J. Medema, W.G.J. van der Meer, W.G.J. van der Meer

Driven by the development of water purification technologies and water quality regulations, the use of better source water and/or upgraded water treatment processes to improve drinking water quality have become common practices worldwide. However, even though these elements lead ...

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Journal article - Anran Ren, Anran Ren, Mingchen Yao, Mingchen Yao, Jiaxing Fang, Jiaxing Fang, Zihan Dai, Zihan Dai, Xiaoming Li, Xiaoming Li, Walter van der Meer, Walter van der Meer, G.J. Medema, G.J. Medema, G.J. Medema, Joan B. Rose, G. Liu, G. Liu, G. Liu

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bac ...

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bacterial communities of water and biofilm were explored, with a special focus on the lifetime development of biofilm communities and their key influencing factors. The 16S rRNA gene sequencing results showed that both the planktonic bacteria and biofilm were dominated by Proteobacteria. Among the 15,084 observed amplicon sequence variants (ASVs), the 33 core ASVs covered 72.8 %, while the 12 shared core ASVs accounted for 62.2 % of the total sequences. Remarkably, it was found that the species richness and diversity of biofilm communities correlated with pipe age. The relative abundance of ASV2 (f_Sphingomonadaceae) was lower for pipe ages 40–50 years (7.9 %) than for pipe ages 10–20 years (59.3 %), while the relative abundance of ASV10 (f_Hyphomonadaceae) was higher for pipe ages 40–50 years (19.5 %) than its presence at pipe ages 20–30 years (1.9 %). The community of the premise plumbing biofilm had significantly higher species richness and diversity than that of the service line, while the steel-plastics composite pipe interior lined with polyethylene (S-PE) harbored significantly more diverse biofilm than the galvanized steel pipes (S-Zn). Interestingly, S-PE was enriched with ASV27 (g_Mycobacterium), while S-Zn pipes were enriched with ASV13 (g_Pseudomonas). Moreover, the network analysis showed that five rare ASVs, not core ASVs, were keystone members in biofilm communities, indicating the importance of rare members in the function and stability of biofilm communities. This manuscript provides novel insights into real-world service lines and premise plumbing microbiology, regarding lifetime dynamics (pipe age 10–50 years), and the influences of pipe types (premise plumbing vs. service line) and pipe materials (S-Zn vs. S-PE).@en

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Journal article - Anran Ren, Anran Ren, Mingchen Yao, Mingchen Yao, Jiaxing Fang, Jiaxing Fang, Zihan Dai, Zihan Dai, Xiaoming Li, Xiaoming Li, Walter van der Meer, Walter van der Meer, G.J. Medema, G.J. Medema, G.J. Medema, Joan B. Rose, G. Liu, G. Liu, G. Liu

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bac ...

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bacterial communities of water and biofilm were explored, with a special focus on the lifetime development of biofilm communities and their key influencing factors. The 16S rRNA gene sequencing results showed that both the planktonic bacteria and biofilm were dominated by Proteobacteria. Among the 15,084 observed amplicon sequence variants (ASVs), the 33 core ASVs covered 72.8 %, while the 12 shared core ASVs accounted for 62.2 % of the total sequences. Remarkably, it was found that the species richness and diversity of biofilm communities correlated with pipe age. The relative abundance of ASV2 (f_Sphingomonadaceae) was lower for pipe ages 40–50 years (7.9 %) than for pipe ages 10–20 years (59.3 %), while the relative abundance of ASV10 (f_Hyphomonadaceae) was higher for pipe ages 40–50 years (19.5 %) than its presence at pipe ages 20–30 years (1.9 %). The community of the premise plumbing biofilm had significantly higher species richness and diversity than that of the service line, while the steel-plastics composite pipe interior lined with polyethylene (S-PE) harbored significantly more diverse biofilm than the galvanized steel pipes (S-Zn). Interestingly, S-PE was enriched with ASV27 (g_Mycobacterium), while S-Zn pipes were enriched with ASV13 (g_Pseudomonas). Moreover, the network analysis showed that five rare ASVs, not core ASVs, were keystone members in biofilm communities, indicating the importance of rare members in the function and stability of biofilm communities. This manuscript provides novel insights into real-world service lines and premise plumbing microbiology, regarding lifetime dynamics (pipe age 10–50 years), and the influences of pipe types (premise plumbing vs. service line) and pipe materials (S-Zn vs. S-PE).@en

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Journal article - Anran Ren, Anran Ren, Mingchen Yao, Mingchen Yao, Jiaxing Fang, Jiaxing Fang, Zihan Dai, Zihan Dai, Xiaoming Li, Xiaoming Li, Walter van der Meer, Walter van der Meer, G.J. Medema, G.J. Medema, G.J. Medema, Joan B. Rose, G. Liu, G. Liu, G. Liu

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bac ...

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bacterial communities of water and biofilm were explored, with a special focus on the lifetime development of biofilm communities and their key influencing factors. The 16S rRNA gene sequencing results showed that both the planktonic bacteria and biofilm were dominated by Proteobacteria. Among the 15,084 observed amplicon sequence variants (ASVs), the 33 core ASVs covered 72.8 %, while the 12 shared core ASVs accounted for 62.2 % of the total sequences. Remarkably, it was found that the species richness and diversity of biofilm communities correlated with pipe age. The relative abundance of ASV2 (f_Sphingomonadaceae) was lower for pipe ages 40–50 years (7.9 %) than for pipe ages 10–20 years (59.3 %), while the relative abundance of ASV10 (f_Hyphomonadaceae) was higher for pipe ages 40–50 years (19.5 %) than its presence at pipe ages 20–30 years (1.9 %). The community of the premise plumbing biofilm had significantly higher species richness and diversity than that of the service line, while the steel-plastics composite pipe interior lined with polyethylene (S-PE) harbored significantly more diverse biofilm than the galvanized steel pipes (S-Zn). Interestingly, S-PE was enriched with ASV27 (g_Mycobacterium), while S-Zn pipes were enriched with ASV13 (g_Pseudomonas). Moreover, the network analysis showed that five rare ASVs, not core ASVs, were keystone members in biofilm communities, indicating the importance of rare members in the function and stability of biofilm communities. This manuscript provides novel insights into real-world service lines and premise plumbing microbiology, regarding lifetime dynamics (pipe age 10–50 years), and the influences of pipe types (premise plumbing vs. service line) and pipe materials (S-Zn vs. S-PE).@en

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Journal article - Anran Ren, Anran Ren, Mingchen Yao, Mingchen Yao, Jiaxing Fang, Jiaxing Fang, Zihan Dai, Zihan Dai, Xiaoming Li, Xiaoming Li, Walter van der Meer, Walter van der Meer, G.J. Medema, G.J. Medema, G.J. Medema, Joan B. Rose, G. Liu, G. Liu, G. Liu

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bac ...

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bacterial communities of water and biofilm were explored, with a special focus on the lifetime development of biofilm communities and their key influencing factors. The 16S rRNA gene sequencing results showed that both the planktonic bacteria and biofilm were dominated by Proteobacteria. Among the 15,084 observed amplicon sequence variants (ASVs), the 33 core ASVs covered 72.8 %, while the 12 shared core ASVs accounted for 62.2 % of the total sequences. Remarkably, it was found that the species richness and diversity of biofilm communities correlated with pipe age. The relative abundance of ASV2 (f_Sphingomonadaceae) was lower for pipe ages 40–50 years (7.9 %) than for pipe ages 10–20 years (59.3 %), while the relative abundance of ASV10 (f_Hyphomonadaceae) was higher for pipe ages 40–50 years (19.5 %) than its presence at pipe ages 20–30 years (1.9 %). The community of the premise plumbing biofilm had significantly higher species richness and diversity than that of the service line, while the steel-plastics composite pipe interior lined with polyethylene (S-PE) harbored significantly more diverse biofilm than the galvanized steel pipes (S-Zn). Interestingly, S-PE was enriched with ASV27 (g_Mycobacterium), while S-Zn pipes were enriched with ASV13 (g_Pseudomonas). Moreover, the network analysis showed that five rare ASVs, not core ASVs, were keystone members in biofilm communities, indicating the importance of rare members in the function and stability of biofilm communities. This manuscript provides novel insights into real-world service lines and premise plumbing microbiology, regarding lifetime dynamics (pipe age 10–50 years), and the influences of pipe types (premise plumbing vs. service line) and pipe materials (S-Zn vs. S-PE).@en

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Journal article - Anran Ren, Anran Ren, Mingchen Yao, Mingchen Yao, Jiaxing Fang, Jiaxing Fang, Zihan Dai, Zihan Dai, Xiaoming Li, Xiaoming Li, Walter van der Meer, Walter van der Meer, G.J. Medema, G.J. Medema, G.J. Medema, Joan B. Rose, G. Liu, G. Liu, G. Liu

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bac ...

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bacterial communities of water and biofilm were explored, with a special focus on the lifetime development of biofilm communities and their key influencing factors. The 16S rRNA gene sequencing results showed that both the planktonic bacteria and biofilm were dominated by Proteobacteria. Among the 15,084 observed amplicon sequence variants (ASVs), the 33 core ASVs covered 72.8 %, while the 12 shared core ASVs accounted for 62.2 % of the total sequences. Remarkably, it was found that the species richness and diversity of biofilm communities correlated with pipe age. The relative abundance of ASV2 (f_Sphingomonadaceae) was lower for pipe ages 40–50 years (7.9 %) than for pipe ages 10–20 years (59.3 %), while the relative abundance of ASV10 (f_Hyphomonadaceae) was higher for pipe ages 40–50 years (19.5 %) than its presence at pipe ages 20–30 years (1.9 %). The community of the premise plumbing biofilm had significantly higher species richness and diversity than that of the service line, while the steel-plastics composite pipe interior lined with polyethylene (S-PE) harbored significantly more diverse biofilm than the galvanized steel pipes (S-Zn). Interestingly, S-PE was enriched with ASV27 (g_Mycobacterium), while S-Zn pipes were enriched with ASV13 (g_Pseudomonas). Moreover, the network analysis showed that five rare ASVs, not core ASVs, were keystone members in biofilm communities, indicating the importance of rare members in the function and stability of biofilm communities. This manuscript provides novel insights into real-world service lines and premise plumbing microbiology, regarding lifetime dynamics (pipe age 10–50 years), and the influences of pipe types (premise plumbing vs. service line) and pipe materials (S-Zn vs. S-PE).@en

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Journal article - Anran Ren, Anran Ren, Mingchen Yao, Mingchen Yao, Jiaxing Fang, Jiaxing Fang, Zihan Dai, Zihan Dai, Xiaoming Li, Xiaoming Li, Walter van der Meer, Walter van der Meer, G.J. Medema, G.J. Medema, G.J. Medema, Joan B. Rose, G. Liu, G. Liu, G. Liu

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bac ...

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bacterial communities of water and biofilm were explored, with a special focus on the lifetime development of biofilm communities and their key influencing factors. The 16S rRNA gene sequencing results showed that both the planktonic bacteria and biofilm were dominated by Proteobacteria. Among the 15,084 observed amplicon sequence variants (ASVs), the 33 core ASVs covered 72.8 %, while the 12 shared core ASVs accounted for 62.2 % of the total sequences. Remarkably, it was found that the species richness and diversity of biofilm communities correlated with pipe age. The relative abundance of ASV2 (f_Sphingomonadaceae) was lower for pipe ages 40–50 years (7.9 %) than for pipe ages 10–20 years (59.3 %), while the relative abundance of ASV10 (f_Hyphomonadaceae) was higher for pipe ages 40–50 years (19.5 %) than its presence at pipe ages 20–30 years (1.9 %). The community of the premise plumbing biofilm had significantly higher species richness and diversity than that of the service line, while the steel-plastics composite pipe interior lined with polyethylene (S-PE) harbored significantly more diverse biofilm than the galvanized steel pipes (S-Zn). Interestingly, S-PE was enriched with ASV27 (g_Mycobacterium), while S-Zn pipes were enriched with ASV13 (g_Pseudomonas). Moreover, the network analysis showed that five rare ASVs, not core ASVs, were keystone members in biofilm communities, indicating the importance of rare members in the function and stability of biofilm communities. This manuscript provides novel insights into real-world service lines and premise plumbing microbiology, regarding lifetime dynamics (pipe age 10–50 years), and the influences of pipe types (premise plumbing vs. service line) and pipe materials (S-Zn vs. S-PE).@en

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Journal article - Anran Ren, Anran Ren, Mingchen Yao, Mingchen Yao, Jiaxing Fang, Jiaxing Fang, Zihan Dai, Zihan Dai, Xiaoming Li, Xiaoming Li, Walter van der Meer, Walter van der Meer, G.J. Medema, G.J. Medema, G.J. Medema, Joan B. Rose, G. Liu, G. Liu, G. Liu

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bac ...

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bacterial communities of water and biofilm were explored, with a special focus on the lifetime development of biofilm communities and their key influencing factors. The 16S rRNA gene sequencing results showed that both the planktonic bacteria and biofilm were dominated by Proteobacteria. Among the 15,084 observed amplicon sequence variants (ASVs), the 33 core ASVs covered 72.8 %, while the 12 shared core ASVs accounted for 62.2 % of the total sequences. Remarkably, it was found that the species richness and diversity of biofilm communities correlated with pipe age. The relative abundance of ASV2 (f_Sphingomonadaceae) was lower for pipe ages 40–50 years (7.9 %) than for pipe ages 10–20 years (59.3 %), while the relative abundance of ASV10 (f_Hyphomonadaceae) was higher for pipe ages 40–50 years (19.5 %) than its presence at pipe ages 20–30 years (1.9 %). The community of the premise plumbing biofilm had significantly higher species richness and diversity than that of the service line, while the steel-plastics composite pipe interior lined with polyethylene (S-PE) harbored significantly more diverse biofilm than the galvanized steel pipes (S-Zn). Interestingly, S-PE was enriched with ASV27 (g_Mycobacterium), while S-Zn pipes were enriched with ASV13 (g_Pseudomonas). Moreover, the network analysis showed that five rare ASVs, not core ASVs, were keystone members in biofilm communities, indicating the importance of rare members in the function and stability of biofilm communities. This manuscript provides novel insights into real-world service lines and premise plumbing microbiology, regarding lifetime dynamics (pipe age 10–50 years), and the influences of pipe types (premise plumbing vs. service line) and pipe materials (S-Zn vs. S-PE).@en

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Journal article - Anran Ren, Anran Ren, Mingchen Yao, Mingchen Yao, Jiaxing Fang, Jiaxing Fang, Zihan Dai, Zihan Dai, Xiaoming Li, Xiaoming Li, Walter van der Meer, Walter van der Meer, G.J. Medema, G.J. Medema, G.J. Medema, Joan B. Rose, G. Liu, G. Liu, G. Liu

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bac ...

Although simulated studies have provided valuable knowledge regarding the communities of planktonic bacteria and biofilms, the lack of systematic field studies have hampered the understanding of microbiology in real-world service lines and premise plumbing. In this study, the bacterial communities of water and biofilm were explored, with a special focus on the lifetime development of biofilm communities and their key influencing factors. The 16S rRNA gene sequencing results showed that both the planktonic bacteria and biofilm were dominated by Proteobacteria. Among the 15,084 observed amplicon sequence variants (ASVs), the 33 core ASVs covered 72.8 %, while the 12 shared core ASVs accounted for 62.2 % of the total sequences. Remarkably, it was found that the species richness and diversity of biofilm communities correlated with pipe age. The relative abundance of ASV2 (f_Sphingomonadaceae) was lower for pipe ages 40–50 years (7.9 %) than for pipe ages 10–20 years (59.3 %), while the relative abundance of ASV10 (f_Hyphomonadaceae) was higher for pipe ages 40–50 years (19.5 %) than its presence at pipe ages 20–30 years (1.9 %). The community of the premise plumbing biofilm had significantly higher species richness and diversity than that of the service line, while the steel-plastics composite pipe interior lined with polyethylene (S-PE) harbored significantly more diverse biofilm than the galvanized steel pipes (S-Zn). Interestingly, S-PE was enriched with ASV27 (g_Mycobacterium), while S-Zn pipes were enriched with ASV13 (g_Pseudomonas). Moreover, the network analysis showed that five rare ASVs, not core ASVs, were keystone members in biofilm communities, indicating the importance of rare members in the function and stability of biofilm communities. This manuscript provides novel insights into real-world service lines and premise plumbing microbiology, regarding lifetime dynamics (pipe age 10–50 years), and the influences of pipe types (premise plumbing vs. service line) and pipe materials (S-Zn vs. S-PE).@en

G. Liu

Authored

Photo-oxidation of Micro-and Nanoplastics

Physical, Chemical, and Biological Effects in Environments

Multi-parametric assessment of biological stability of drinking water produced from groundwater

Reverse osmosis vs. conventional treatment

Effect of residual H2O2 from advanced oxidation processes on subsequent biological water treatmen

A laboratory batch study

Assessing the transition effects in a drinking water distribution system caused by changing supply water quality

An indirect approach by characterizing suspended solids

Microplastics in terrestrial ecosystem

Exploring the menace to the soil-plant-microbe interactions

Microplastics in terrestrial ecosystem

Exploring the menace to the soil-plant-microbe interactions

Potential impacts of changing supply-water quality on drinking water distribution

A review

Potential impacts of changing supply-water quality on drinking water distribution

A review

Potential impacts of changing supply-water quality on drinking water distribution

A review

Potential impacts of changing supply-water quality on drinking water distribution

A review

Potential impacts of changing supply-water quality on drinking water distribution

A review

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Bacterial communities of planktonic bacteria and mature biofilm in service lines and premise plumbing of a Megacity

Composition, Diversity, and influencing factors

Contributed

Thermal Energy Recovery from Drinking Water Distribution Systems

A study into microbial water quality and potential energy