Advances in application of ultraviolet irradiation for biofilm control in water and wastewater infrastructure

Luo, Xiaoting; Zhang, Baoping; Lu, Yinghua; Mei, Yang; Shen, Liang

doi:10.1016/j.jhazmat.2021.126682

Cited by 58 publications

(29 citation statements)

References 131 publications

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“…3A ). A thick EPS sheath can increase the effective path lengths of absorbing radiation and can attenuate the level of UV radiation reaching the cells ( 35 ). Studies have reported that EPS can screen 67% of UVA, 69% of UVB, and 87% of UVC from transmitting ( 36 ).…”

Section: Discussionmentioning

confidence: 99%

Protection and Damage Repair Mechanisms Contributed To the Survival of Chroococcidiopsis sp. Exposed To a Mars-Like Near Space Environment

Zhang

et al. 2022

Microbiol Spectr

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Section: Discussionmentioning

confidence: 99%

Protection and Damage Repair Mechanisms Contributed To the Survival of Chroococcidiopsis sp. Exposed To a Mars-Like Near Space Environment

Zhang

et al. 2022

Microbiol Spectr

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“…In addition, excimer lamps and LEDs are the most used nowadays (Bergman, 2021; Hazell et al., 2019; Li et al., 2019). Mainly, because LEDs can emit various wavelengths, allowing for synergistic effects and optimizing the disinfection process (Linden et al., 2019; Luo et al., 2022).…”

Section: Sanitization Methods For Dry Food Processing Equipment In Lm...mentioning

confidence: 99%

“…To overcome the UV‐C limitations, studies have focused on synergy obtained from the combination of UV‐C with UV‐A against biofilms, due to greater penetration and ability to destroy the microbial membrane (Linden et al., 2019; Luo et al., 2022). Sequential UV‐A/UV‐C and pulsed irradiation using LED appears to have a good synergistic effect for the elimination of biofilms, with good prospects for the feasible implementation of this technology (Li et al., 2019; Luo et al., 2022). In addition, the UV‐C treatment also may be combined with other methods, such as benzoic acid and ozone (Ding et al., 2017; Watson et al., 2020).…”

Section: Sanitization Methods For Dry Food Processing Equipment In Lm...mentioning

confidence: 99%

Dry surface biofilms in the food processing industry: An overview on surface characteristics, adhesion and biofilm formation, detection of biofilms, and dry sanitization methods

Alonso

Gonçalves

Brito

et al. 2022

Comp Rev Food Sci Food Safe

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Bacterial biofilm formation in low moisture food processing (LMF) plants is related to matters of food safety, production efficiency, economic loss, and reduced consumer trust. Dry surfaces may appear dry to the naked eye, however, it is common to find a coverage of thin liquid films and microdroplets, known as microscopic surface wetness (MSW). The MSW may favor dry surface biofilm (DSB) formation. DSB formation is similar in other industries, it occurs through the processes of adhesion, production of extracellular polymeric substances, development of microcolonies and maturation, it is mediated by a quorum sensing (QS) system and is followed by dispersal, leading to disaggregation. Species that survive on dry surfaces develop tolerance to different stresses. DSB are recalcitrant and contribute to higher resistance to sanitation, becoming potential sources of contamination, related to the spoilage of processed products and foodborne disease outbreaks. In LMF industries, sanitization is performed using physical methods without the presence of water. Although alternative dry sanitizing methods can be efficiently used, additional studies are still required to develop and assess the effect of emerging technologies, and to propose possible combinations with traditional methods to enhance their effects on the sanitization process. Overall, more information about the different technologies can help to find the most appropriate method/s, contributing to the development of new sanitization protocols. Thus, this review aimed to identify the main characteristics and challenges of biofilm management in low moisture food industries, and summarizes the mechanisms of action of different dry sanitizing methods (alcohol, hot air, UV‐C light, pulsed light, gaseous ozone, and cold plasma) and their effects on microbial metabolism.

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“…Compared with UVB and UVA, UVC is considered to be the most effective band for disinfection. The mechanism of bacterial inactivation is based on the absorption of ultraviolet photons by genetic materials, which can inhibit the transcription and replication of cell genes by producing pyrimidine dimers [4] . However, due to the phenomenon of photoreactivation, the disinfection efficiency is well limited.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet light-emitting diodes inactivate microorganisms on contaminated surface

Shao

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Ultraviolet light emitting diode (UV-LED) is a hygienic treatment in effectively inactivating pathogenic microorganisms on surfaces and objects. However, how the combination types of different light influence the disinfection efficiency remains elusive. In this study, the effects of single and double wavelength on surface disinfection were assessed. Meanwhile, the effects of different radiation modes on surface disinfection were studied. The results showed that the dual-wavelength (UVA and UVC) had better disinfecting effect than the single wavelength. For the irradiation mode, UVA pre-treatment enhanced the inactivation effectiveness of microorganisms on surface. In detail, 367 nm UVA pre-treatment followed by 265 nm UVC worked better as the log inactivation of the dual-wavelength was more than 2 times higher than that from the sum of applying single exposure separately. Moreover, the radiational order had a significant impact on disinfection effect. In addition, extending the irradiation time could enhance the inactivation efficiency. In summary, this study provides a new insight into the development of surface disinfection technologies.

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Advances in application of ultraviolet irradiation for biofilm control in water and wastewater infrastructure

Cited by 58 publications

References 131 publications

Protection and Damage Repair Mechanisms Contributed To the Survival of Chroococcidiopsis sp. Exposed To a Mars-Like Near Space Environment

Protection and Damage Repair Mechanisms Contributed To the Survival of Chroococcidiopsis sp. Exposed To a Mars-Like Near Space Environment

Dry surface biofilms in the food processing industry: An overview on surface characteristics, adhesion and biofilm formation, detection of biofilms, and dry sanitization methods

Ultraviolet light-emitting diodes inactivate microorganisms on contaminated surface

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