Photobiological safety of lamps and lamp systems in agriculture

Semenov, А.; Сахно, Т. В.; Sakhno, Yuriy

doi:10.5604/01.3001.0015.0527

Cited by 3 publications

(1 citation statement)

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“…In practice, radiation intensity of at least 400 mJ/m 2 is required for the operation of fish incubators and RAS. In Ukraine, ozonation is the predominant method of water disinfection in aquaculture (Semenov et al, 2021a;Semenov et al, 2021b). In this report we present an example of an alternative solution -UV disinfection of water in aquaculture facility for caviar production.…”

Section: Introductionmentioning

confidence: 91%

Ultraviolet disinfection of water in recirculating aquaculture system: a case study at sturgeon caviar fish farm

Semenov

SEMENOVA²

2022

AAS

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In this report, we present a practical example of ultraviolet (UV) water disinfection in an aquaculture facility for sturgeon caviar production. Among the methods of water disinfection in recirculating aquaculture systems, the technical approaches using ozonation or ultraviolet radiation in combination with other methods are the most effective. However, improper use of ozonation can result in excessive ozone concentrations that can cause serious harm to fish and be harmful to the environment and personnel. Therefore, we describe an example of a reagent-free ultraviolet water disinfection system. Preliminary results show that filtration followed by ultraviolet irradiation inactivates microorganisms in fish tank water. Total microbial count, total coliform bacteria, and E. coli (CFU/m3) did not exceed the permissible values. The described UV system provides an irradiance of 180 W/m2. For a pool with a water volume of 300 m3, bacteriological purity of the water was achieved with 480 W of UV-light.

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Section: Introductionmentioning

confidence: 91%

Ultraviolet disinfection of water in recirculating aquaculture system: a case study at sturgeon caviar fish farm

Semenov

SEMENOVA²

2022

AAS

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A review on free space optical communication links: 5G applications

Mali,

Ratnam,

Ali

et al. 2024

Journal of Optical Communications

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Free space optical (FSO) communications has garnered significant attention as a potential substitute for radio frequency (RF) wireless communication in short and long range transmissions. Free-space optical (FSO) communication is a method where an optical beam is sent across an unguided channel, gaining favour in high-speed wireless networks due to its large optical bandwidth, fast data transmission, lack of licencing requirements, secure nature, and easy setup. Despite several inherent advantages that FSO has over existing radio frequency (RF) communication technologies, its link performance is severely hampered by atmospheric fog and turbulence, which not only reduce optical irradiance but also cause the modulated optical beam to deviate from its intended path, impacting the quality of the received signal. This review paper discusses FSO technology, channel impairments under varied atmospheric attenuation conditions, advantages, and applications. Various channel models in terms of probability density functions are described, which characterise the statistical nature of the irradiance fluctuations of optical transmission through scattering and atmospheric turbulence. Key objectives that need to be addressed in the near future, particularly in fifth-generation (5G) and beyond, includes enhancing capacity, boosting data rates, minimising latency, and enhancing service quality. Last but not the least, several uses of FSO that facilitates 5G and future technologies have also been covered in this study.

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Ultraviolet disinfection of activated carbon from microbiological contamination

Semenov

Hmelnitska

2022

Archives of Materials Science and Engineering

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This article aims to investigate the effectiveness of the use of ultraviolet radiation or a combination of ultraviolet radiation and ozonation in the inactivation of microorganisms in activated carbon "Silcarbon". Several experimental studies where ultraviolet light, a combination of UV radiation, and ozonation were used have been performed to disinfect "Silcarbon" from microbiological contaminants. Experimental results have shown that with pulsed xenon lamps and low-pressure mercury ozone lamps, satisfactory results can be obtained in which the total amount of yeast and mould fungi range from 50 CFU/g to 75 CFU/g. It is advisable to continue the study of powder materials, including drugs, on the content of microbiological contaminants to assess their compliance with regulatory requirements. The application of the proposed approach to the inactivation of microorganisms allows one to obtain a safe sorbent on the content of microbiological indicators and can be successfully used in any other field to disinfection powder materials using different modes of UV irradiation. The originality of the article's results proposes a method of disinfection of the sorbent "Silcarbon" from moulds and yeasts for therapeutic purposes in medicine.

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Photobiological safety of lamps and lamp systems in agriculture

Cited by 3 publications

References 0 publications

Ultraviolet disinfection of water in recirculating aquaculture system: a case study at sturgeon caviar fish farm

Ultraviolet disinfection of water in recirculating aquaculture system: a case study at sturgeon caviar fish farm

A review on free space optical communication links: 5G applications

Ultraviolet disinfection of activated carbon from microbiological contamination

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