Inactivation of chlorine-resistant bacterial spores in drinking water using UV irradiation, UV/Hydrogen peroxide and UV/Peroxymonosulfate: Efficiency and mechanism

Zeng, Fanzhe; Cao, Song; Jin, Wei; Zhou, Xu; Ding, Wanqing; Tu, Renjie; Han, Song-Fang; Wang, Changping; Jiang, Qijun; Huang, Hui; Ding, Feng

doi:10.1016/j.jclepro.2019.118666

Cited by 83 publications

(29 citation statements)

References 48 publications

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“…To mitigate the risk of CRB, researchers have recently proposed several combined disinfection processes such as UV/Cl 2 , UV/hydrogen peroxide, UV/peroxymonosulfate, etc. (Zhu et al, 2020;Zeng et al, 2020), although most of these processes were only explored on lab-scale. Future studies may focus on optimizing operation parameters to balance continuous disinfection ability and biofilm CRB control, and large-scale application of these technologies in the practical field.…”

Section: Outlook For Future Researchmentioning

confidence: 99%

Thermal energy recovery from chlorinated drinking water distribution systems: Effect on chlorine and microbial water and biofilm characteristics

Zhou

Ahmad

Hoek

et al. 2020

Environmental Research

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Thermal energy recovery from drinking water has a high potential in the application of sustainable building and industrial cooling. However, drinking water and biofilm microbial qualities should be concerned because the elevated water temperature after cold recovery may influence the microbial activities in water and biofilm phases in drinking water distribution systems (DWDSs). In this study, the effect of cold recovery on microbial qualities was investigated in a chlorinated DWDS. The chlorine decay was slight (1.1%-15.5%) due to a short contact time (~60 s) and was not affected by the cold recovery (p > 0.05). The concentrations of cellular ATP and intact cell numbers in the bulk water were partially inactivated by the residual chlorine, with the removal rates of 10.1%-16.2% and 22.4%-29.4%, respectively. The chlorine inactivation was probably promoted by heat exchangers but was not further enhanced by higher temperatures. The higher water temperature (25°C) enhanced the growth of biofilm biomass on pipelines. Principle coordination analysis (PCoA) showed that the biofilms on the stainless steel plates of HEs and the plastic pipe inner surfaces had totally different community compositions. Elevated temperatures favored the growth of Pseudomonas spp. and Legionella spp. in the biofilm after cold recovery. The community functional predictions revealed more abundances of five human diseases (e.g. Staphylococcis aureus infection) and beta-lactam resistance pathways in the biofilms at higher temperature. Compared with a previous study with a non-chlorinated DWDS, chlorine dramatically reduced the biofilm biomass growth but raised the relative abundances of the chlorine-resistant genera (i.e. Pseudomonas and Sphingomonas) in bacterial communities.

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Section: Outlook For Future Researchmentioning

confidence: 99%

Thermal energy recovery from chlorinated drinking water distribution systems: Effect on chlorine and microbial water and biofilm characteristics

Zhou

Ahmad

Hoek

et al. 2020

Environmental Research

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“…Indeed, the electrons stored on the CB of C-N-TiO 2 film participated in the reduction of O 2 to superoxide anions (O 2 − ), which directly attacked the plasmonic membrane of B. subtilis leading to its deactivation and hence the slight reduction of its colony-forming unit counts observed in Figure 8 b with SS/C-N-TiO 2 after 48 h. Similar investigations were carried out using different advance oxidations [ 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 ].…”

Section: Discussionmentioning

confidence: 71%

Anticorrosion Coated Stainless Steel as Durable Support for C-N-TiO2 Photo Catalyst Layer

et al. 2020

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The development of durable photocatalytic supports resistant in harsh environment has become challenging in advanced oxidation processes (AOPs) focusing on water and wastewater remediation. In this study, stainless steel (SS), SS/Ti (N,O) and SS/Cr-N/Cr (N,O) anticorrosion layers on SS meshes were dip-coated with sol gel synthesised C-N-TiO2 photo catalysts pyrolysed at 350 °C for 105 min, using a heating rate of 50 °C/min under N2 gas. The supported C-N-TiO2 films were characterised by scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Raman spectroscopy. The results showed that C-N-TiO2 was successfully deposited on anticorrosion coated SS supports and had different morphologies. The amorphous C and TiO2 were predominant in C-N-TiO2 over anatase and rutile phases on the surface of SS and anticorrosion supports. The C-N-TiO2 coated films showed enhanced photocatalytic activity for the decolouration of O.II dye under both solar and UV radiations. The fabricated C-N-TiO2 films showed significant antibacterial activities in the dark as well as in visible light. Herein, we demonstrate that SS/Ti(N,O) and SS/Cr-N/Cr(N,O) anticorrosion coatings are adequate photocatalytic and corrosion resistant supports. The C-N-TiO2 photo catalytic coatings can be used for water and wastewater decontamination of pollutants and microbes.

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“…Por tanto, existen muchas evidencias sobre la eficacia de UV en la desactivación de microrganismos en el agua de consumo humano. Zeng et al (2020), detallaron en su investigación en donde realizaron dos experimentaciones, una aplicando solo radiación ultravioleta y una segunda mesclando la radiación ultravioleta con la oxidación mediante peróxido de Hidrogeno, obteniendo mejores resultados en la segunda experimentación, esto aplicado a bacterias resistentes al Cloro, que se encuentran en aguas tratadas por cloración para su desinfección.…”

Section: Coliformes Termotolerantesunclassified

Radiación ultravioleta-c para desinfección bacteriana (coliformes totales y termotolerantes) en el tratamiento de agua potable

Bernedo

Mayhua²,

Gonzales³

et al. 2020

Rev. investig. altoandin.

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Radiación ultravioleta-c para desinfección bacteriana (coliformes totales y termotolerantes) en el tratamiento de agua potable Radiation ultraviolet-c for bacterial disinfection (total and thermotolerant coliforms) in the water treatment RESUMENEl estudio tuvo como objetivo evaluar la presencia de bacterias (coliformes totales y termotolerantes) en el tratamiento del agua haciendo uso de Radiación Ultravioleta clase C (UV-C), se realizó la

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Inactivation of chlorine-resistant bacterial spores in drinking water using UV irradiation, UV/Hydrogen peroxide and UV/Peroxymonosulfate: Efficiency and mechanism

Cited by 83 publications

References 48 publications

Thermal energy recovery from chlorinated drinking water distribution systems: Effect on chlorine and microbial water and biofilm characteristics

Thermal energy recovery from chlorinated drinking water distribution systems: Effect on chlorine and microbial water and biofilm characteristics

Anticorrosion Coated Stainless Steel as Durable Support for C-N-TiO2 Photo Catalyst Layer

Radiación ultravioleta-c para desinfección bacteriana (coliformes totales y termotolerantes) en el tratamiento de agua potable

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