Disinfection Efficiency And Dose Measurement Of Polychromatic Uv Light

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Disinfection Efficiency and Dose Measurement of Polychromatic UV Light

Author : Karl G. Linden
Publisher : IWA Publishing
ISBN 13 : 1843398400
Total Pages : 140 pages
Book Rating : 4.8/5 (433 download)

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Book Synopsis Disinfection Efficiency and Dose Measurement of Polychromatic UV Light by : Karl G. Linden

Download or read book Disinfection Efficiency and Dose Measurement of Polychromatic UV Light written by Karl G. Linden and published by IWA Publishing. This book was released on 2004-01-01 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is currently intense interest in the use of ultraviolet technology for helping to meet future regulations relating to improved microbial inactivation and decreased disinfection byproducts (DBPs). Much of this interest has been fueled by recent research indicating the effectiveness of UV technologies for the inactivation of Cryptosporidium. This scientific discovery, combined with proposed regulations concerning DBPs in the United States, has resulted in a need to evaluate the feasibility and effectiveness of UV irradiation for use as a disinfectant for drinking water.The objectives of this project were to:(1) develop and evaluate physical, chemical, and biological methods for calculating effective germicidal UV dose from medium-pressure (MP) and Pulsed-UV (P-UV) lamps;(2) establish a UV dose/log inactivation relationship for specific bacterial and viral indicators for MP and P-UV lamps;(3) determine the extent of photoreactivation and dark repair of heterotrophic bacteria after treatment by MP and P-UV lamps; and(4) compare the ability of MP and P-UV lamps to inactivate Cryptosporidium. Originally published by AwwaRF for its subscribers in 2003 This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below

Inactivation of Pathogens with Innovative UV Technologies

Author :
Publisher : American Water Works Association
ISBN 13 : 9781583213414
Total Pages : 112 pages
Book Rating : 4.2/5 (134 download)

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Book Synopsis Inactivation of Pathogens with Innovative UV Technologies by :

Download or read book Inactivation of Pathogens with Innovative UV Technologies written by and published by American Water Works Association. This book was released on 2004 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research studied low pressure(LP), low pressure-high-output (LPHO, medium pressure(MP) and pulsed (PUV) UV Systems and their effects on various pathogens. Among the findings were: bacteria is more susceptible to UV light than viruses; some strains of E.coli had different dose responses without explanation; adenovirus serotypes 40 and 41 are highly resistant to UV inactivation and a residual disinfection process is recommended to follow UV disinfection. All details of the study and models are discussed thoroughly.

Microbial Decontamination in the Food Industry

Author : Ali Demirci
Publisher : Elsevier
ISBN 13 : 0857095757
Total Pages : 841 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis Microbial Decontamination in the Food Industry by : Ali Demirci

Download or read book Microbial Decontamination in the Food Industry written by Ali Demirci and published by Elsevier. This book was released on 2012-06-26 with total page 841 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of creating microbiologically-safe food with an acceptable shelf-life and quality for the consumer is a constant challenge for the food industry. Microbial decontamination in the food industry provides a comprehensive guide to the decontamination problems faced by the industry, and the current and emerging methods being used to solve them.Part one deals with various food commodities such as fresh produce, meats, seafood, nuts, juices and dairy products, and provides background on contamination routes and outbreaks as well as proposed processing methods for each commodity. Part two goes on to review current and emerging non-chemical and non-thermal decontamination methods such as high hydrostatic pressure, pulsed electric fields, irradiation, power ultrasound and non-thermal plasma. Thermal methods such as microwave, radio-frequency and infrared heating and food surface pasteurization are also explored in detail. Chemical decontamination methods with ozone, chlorine dioxide, electrolyzed oxidizing water, organic acids and dense phase CO2 are discussed in part three. Finally, part four focuses on current and emerging packaging technologies and post-packaging decontamination.With its distinguished editors and international team of expert contributors, Microbial decontamination in the food industry is an indispensable guide for all food industry professionals involved in the design or use of novel food decontamination techniques, as well as any academics researching or teaching this important subject. Provides a comprehensive guide to the decontamination problems faced by the industry and outlines the current and emerging methods being used to solve them Details backgrounds on contamination routes and outbreaks, as well as proposed processing methods for various commodities including fresh produce, meats, seafood, nuts, juices and dairy products Sections focus on emerging non-chemical and non-thermal decontamination methods, current thermal methods, chemical decontamination methods and current and emerging packaging technologies and post-packaging decontamination

Food Processing Technologies

Author : Amit K. Jaiswal
Publisher : CRC Press
ISBN 13 : 1482257556
Total Pages : 760 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Food Processing Technologies by : Amit K. Jaiswal

Download or read book Food Processing Technologies written by Amit K. Jaiswal and published by CRC Press. This book was released on 2016-08-05 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: The processing of food generally implies the transformation of the perishable raw food to value-added products. It imparts benefits, such as the destruction of surface microflora, and inactivation of deleterious enzymes, such as peroxidase, leading to a greater shelf life of the food. It also enhances color and texture while maintaining quality of products and makes them edible. However, it also has an inevitable impact on nutritional quality attributes, such as increase or decrease in certain vitamins and bioactive metabolites among others. Food Processing Technologies: Impact on Product Attributes covers a range of food processing technologies and their effect on various food product attributes, such as bioactive compounds, safety, and sensory and nutritional aspects of the food upon processing. There are eight major parts in the book. Part I covers the conventional processing technologies. Parts II, III, IV, and V deal with various novel processing technologies, including impingement processing technologies, electro-magnetic processing technologies, physico-mechanical processing technologies, and electro-technologies. Part VI introduces chemical processing technologies. Part VII comprise irradiation processing technology, and the final part is focused on biological processing technology, detailing the application of enzymes in food processing. Numerous studies were carried out to find the impact of these processing technologies on various aspects of food and associated health promotion properties. Both positive and negative results were obtained based on nature of foods, processing type, and duration of processing, and this book covers these results in depth.

Novel Food Preservation and Microbial Assessment Techniques

Author : Ioannis S. Boziaris
Publisher : CRC Press
ISBN 13 : 1466580755
Total Pages : 470 pages
Book Rating : 4.4/5 (665 download)

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Book Synopsis Novel Food Preservation and Microbial Assessment Techniques by : Ioannis S. Boziaris

Download or read book Novel Food Preservation and Microbial Assessment Techniques written by Ioannis S. Boziaris and published by CRC Press. This book was released on 2014-04-14 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for minimally processed foods has resulted in the development of innovative, non-thermal food preservation methods, such as high-pressure sonication, ozone, and UV treatment. This book presents a summary of these novel food processing techniques. It also covers new methods used to monitor microbial activity, including spectroscopic methods (FT-IR and Raman), molecular and electronic noses, and DNA-based methods.

Food Packaging and Preservation

Author : Amit K. Jaiswal
Publisher : Academic Press
ISBN 13 : 0323886205
Total Pages : 353 pages
Book Rating : 4.3/5 (238 download)

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Book Synopsis Food Packaging and Preservation by : Amit K. Jaiswal

Download or read book Food Packaging and Preservation written by Amit K. Jaiswal and published by Academic Press. This book was released on 2023-11-24 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Food Packaging and Preservation: Antimicrobial Materials and Technologies provides a scaffolded introduction to principles of biological science (food contamination and their effect on human health) as well as nanomaterials, natural antimicrobials and emerging non-thermal processing methods. The book's goal is to help users develop sustainable usage of these materials and technologies. It is designed to help researchers in food technology, materials science, nanoscience, and polymer science, but it will also be ideal for researchers and developers who develop antimicrobial technologies for food industry applications, in particular food packaging and the preservation of food products. Thoroughly explores the application of nanomaterials, nanocomposites, antimicrobial materials from natural sources, and emerging non-thermal processing technologies Covers nanomaterials, natural extracts and their usage in micro and nanoemulsion form Examines non- thermal processing methods and their combinations for food packaging and food preservation

Ultraviolet disinfection guidance manual

Author :
Publisher : DIANE Publishing
ISBN 13 : 1428900195
Total Pages : 478 pages
Book Rating : 4.4/5 (289 download)

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Book Synopsis Ultraviolet disinfection guidance manual by :

Download or read book Ultraviolet disinfection guidance manual written by and published by DIANE Publishing. This book was released on 2003 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Ultraviolet Disinfection Handbook

Author : James R. Bolton
Publisher : American Water Works Association
ISBN 13 : 1613000774
Total Pages : 167 pages
Book Rating : 4.6/5 (13 download)

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Book Synopsis The Ultraviolet Disinfection Handbook by : James R. Bolton

Download or read book The Ultraviolet Disinfection Handbook written by James R. Bolton and published by American Water Works Association. This book was released on 2011-01-12 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ultraviolet Light in Water and Wastewater Sanitation (2002)

Author : Willy J. Masschelein
Publisher : CRC Press
ISBN 13 : 1351355716
Total Pages : 188 pages
Book Rating : 4.3/5 (513 download)

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Book Synopsis Ultraviolet Light in Water and Wastewater Sanitation (2002) by : Willy J. Masschelein

Download or read book Ultraviolet Light in Water and Wastewater Sanitation (2002) written by Willy J. Masschelein and published by CRC Press. This book was released on 2017-11-22 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several general books are available on ultraviolet light and its applications. However, this is the first comprehensive monograph that deals with its application to water and wastewater treatment. There is a rapidly growing interest in using UV light in water sanitation due to the increased knowledge of the potential health and environmental impacts of disinfection byproducts. Ultraviolet Light in Water and Wastewater Sanitation integrates the fundamental physics applicable to water and wastewater sanitation, the engineering aspects, and the practical experience in the field. The text analyzes the concerns associated with this application of UV light and brings together comprehensive information on the presently available UV technologies applicable to water and wastewater treatment including: lamp technologies, criteria of evaluation and choice of technology; fundamental principles; performance criteria for disinfection; design criteria and methods; synergistic use of UV and oxidants (advanced oxidation); and functional requirements and potential advantages and drawbacks of the technique. Ultraviolet Light in Water and Wastewater Sanitation is the only treatise currently available combining fundamental knowledge, recommendations for design, evaluations of performance, and future prospects for this application. Water and wastewater treatment professionals, water utility employees, governmental regulators, and chemists will find this book an essential and unique reference for a technology which has received growing regulatory acceptance.

Sci-tech News

Author :
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Sci-tech News by :

Download or read book Sci-tech News written by and published by . This book was released on 2005 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ultraviolet Germicidal Irradiation Handbook

Author : Wladyslaw Kowalski
Publisher : Springer Science & Business Media
ISBN 13 : 3642019994
Total Pages : 504 pages
Book Rating : 4.6/5 (42 download)

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Book Synopsis Ultraviolet Germicidal Irradiation Handbook by : Wladyslaw Kowalski

Download or read book Ultraviolet Germicidal Irradiation Handbook written by Wladyslaw Kowalski and published by Springer Science & Business Media. This book was released on 2010-01-12 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference covers technical information on ultraviolet germicidal irradiation and its application to air and surface disinfection and the control of pathogens and allergens. Its main focus is airborne microbes and surface contamination applications.

Fate and Persistence of Pathogens Subjected to Disinfection

Author : Karl G. Linden
Publisher : IWA Publishing
ISBN 13 : 1843396998
Total Pages : 124 pages
Book Rating : 4.8/5 (433 download)

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Book Synopsis Fate and Persistence of Pathogens Subjected to Disinfection by : Karl G. Linden

Download or read book Fate and Persistence of Pathogens Subjected to Disinfection written by Karl G. Linden and published by IWA Publishing. This book was released on 2004-01-01 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disinfection of wastewater is a necessary treatment process for protecting the public from potential exposure to pathogenic microorganisms because many wastewater effluents are discharged into water bodies that may be used for recreation or as future drinking water supplies. Two common forms of disinfection are chlorine and ultraviolet (UV) light. However, microorganisms differ in their susceptibility to UV and chlorine disinfectants. It is necessary to understand how different classes of pathogens respond to UV and chlorine disinfection processes in wastewater to better develop strategies for optimizing the treatment of pathogens in wastewater. It is also recognized that water quality may impact disinfection effectiveness, such as protection of pathogen by particles and disinfectant demand. This study investigated bacteria, viruses and protozoan pathogens. All species of bacteria tested were susceptible to both UV and chlorine, despite differences in antibiotic resistance and tendency to aggregate. Upon exposure to disinfection conditions that could indicate viability of the bacteria tested, but not culturability using common methods, it was found that UV and chlorine were effective in eliminating the capability of viable but non-culturable bacteria to resuscitate and become re-infective. Clostridium spores were resistant to free chlorine and UV disinfection but found to be susceptible to long exposure to monochloramine. Cryptosporidium was resistant to all chlorine forms but very susceptible to UV irradiation. Pathogenic and indicator viruses tested were very susceptible to free chlorine and UV disinfection. UV radiation throughout the 200 to 300 nm range was effective for inactivation of viruses and C. parvum, but wavelengths between 260-270 nm and below 220 nm appeared to be more effective for viruses, suggesting a possible advantage for polychromatic UV sources. Sequential disinfection strategies were proposed and tested to enhance inactivation of various microorganisms. One scenario integrated UV disinfection followed by dynamic chloramination through addition of free chlorine and subsequent transformation to combined chlorine. Further, disinfection of microorganisms in wastewater presents challenges that are inherent to the water matrix, such as pathogens associated with particles. UV and chlorine were both effective for disinfection of coliform in wastewater but chlorine was found to be more effective during long contact times for inactivation of particle associated coliform. In addition to coliform, both Cryptosporidium parvum and Salmonella typhimurium were identified as being particle associated in wastewater using molecular approaches developed to detect microbes in environmental samples

Fluence Monitoring in UV Disinfection Dystems

Author : G. IJpelaar
Publisher : International Water Assn
ISBN 13 : 9781843399582
Total Pages : 76 pages
Book Rating : 4.3/5 (995 download)

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Book Synopsis Fluence Monitoring in UV Disinfection Dystems by : G. IJpelaar

Download or read book Fluence Monitoring in UV Disinfection Dystems written by G. IJpelaar and published by International Water Assn. This book was released on 2006 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report develops an online fluence meter. The meter is based on a UV-sensitive chemical that forms a photocatalytic product with a relation to the applied UV dose. The report proceeds to find naturally-occurring substances or chemicals to be dosed while reacting with UV-C light (200-285 nm) and produces measurable photocatalytic products in the 0-1,000 J/m2 dose range. To properly disinfect water, UV sensors enable the UV dose to be monitored. However, these sensors only detect 254 nm UV light, which is unsatisfactory for UV systems equipped with medium-pressure lamps. Moreover, these sensors are not very accurate, break down easily, and have to be recalibrated frequently. Therefore, the readings of each individual sensor have to be computed with Computational Fluid Dynamics (CFD) to be able to calculate the UV dose. Producing a clear and mathematically useful relation between the concentration of the photo product and the applied UV dose required that the system be dosed with either naturally-occurring compounds or toxicologically acceptable chemicals. The chemicals selected were investigated by performing collimated beam tests. Although several parameters affected the UV dose in UV disinfection systems, only the variation in water quality was taken into account in this research.

Practical Aspects of UV Disinfection

Author : Erin D. Mackey
Publisher : American Water Works Association
ISBN 13 : 1583211748
Total Pages : 202 pages
Book Rating : 4.5/5 (832 download)

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Book Synopsis Practical Aspects of UV Disinfection by : Erin D. Mackey

Download or read book Practical Aspects of UV Disinfection written by Erin D. Mackey and published by American Water Works Association. This book was released on 2001 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluates long-term performance and feasibility of UV disinfection and develops criteria for selecting technology designed to prevent against Cryptosporidium . Chapters provide background information, describe the materials and methods used, discuss the inactivations of microorganisms by

Ultraviolet Light in Water and Wastewater Sanitation

Author : Willy J. Masschelein
Publisher : CRC Press
ISBN 13 : 1420032178
Total Pages : 193 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Ultraviolet Light in Water and Wastewater Sanitation by : Willy J. Masschelein

Download or read book Ultraviolet Light in Water and Wastewater Sanitation written by Willy J. Masschelein and published by CRC Press. This book was released on 2016-04-19 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several general books are available on ultraviolet light and its applications. However, this is the first comprehensive monograph that deals with its application to water and wastewater treatment. There is a rapidly growing interest in using UV light in water sanitation due to the increased knowledge of the potential health and environmental impact

Book Review Index

Author :
Publisher :
ISBN 13 :
Total Pages : 1426 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Book Review Index by :

Download or read book Book Review Index written by and published by . This book was released on 2006 with total page 1426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every 3rd issue is a quarterly cumulation.

Encyclopedia of Microbiology

Author : Thomas M. Schmidt
Publisher : Academic Press
ISBN 13 : 0128117370
Total Pages : 3248 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Encyclopedia of Microbiology by : Thomas M. Schmidt

Download or read book Encyclopedia of Microbiology written by Thomas M. Schmidt and published by Academic Press. This book was released on 2019-09-11 with total page 3248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of Microbiology, Fourth Edition, Five Volume Set gathers both basic and applied dimensions in this dynamic field that includes virtually all environments on Earth. This range attracts a growing number of cross-disciplinary studies, which the encyclopedia makes available to readers from diverse educational backgrounds. The new edition builds on the solid foundation established in earlier versions, adding new material that reflects recent advances in the field. New focus areas include `Animal and Plant Microbiomes’ and ‘Global Impact of Microbes`. The thematic organization of the work allows users to focus on specific areas, e.g., for didactical purposes, while also browsing for topics in different areas. Offers an up-to-date and authoritative resource that covers the entire field of microbiology, from basic principles, to applied technologies Provides an organic overview that is useful to academic teachers and scientists from different backgrounds Includes chapters that are enriched with figures and graphs, and that can be easily consulted in isolation to find fundamental definitions and concepts