Download or read book Effectiveness of Chlorine Dioxide as a Wastewater Disinfectant written by James D. Berg and published by . This book was released on 1978 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chlorine dioxide is evaluated as an alternative to chlorine for use in the disinfection of municipal wastewater. Bench-scale experiments in three topic areas are discussed: first, two methods for counting bacteria, membrane filter and most probable number are compared. Secondly factors affecting the relatively inadequate performance of chlorine dioxide, based on kill of coliform bacteria, are investigated. Thirdly, the two disinfectants are compared according to inactivation of viruses in secondary effluent. The information from these experiments will ultimately be used to develop a concept for a continuous reactor system that will be tested on a pilot scale.

Download or read book Chlorine Dioxide for Wastewater Treatment written by Ernesto Marco Aieta and published by . This book was released on 1980 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chlorine dioxide for wastewater disinfection written by Paul V. Roberts and published by . This book was released on 1980 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book White s Handbook of Chlorination and Alternative Disinfectants written by Black & Veatch Corporation and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 1109 pages. Available in PDF, EPUB and Kindle. Book excerpt: New edition covers the latest practices, regulations, and alternative disinfectants Since the publication of the Fourth Edition of White's Handbook of Chlorination and Alternative Disinfectants more than ten years ago, the water industry has made substantial advances in their understanding and application of chlorine, hypochlorite, and alternative disinfectants for water and wastewater treatment. This Fifth Edition, with its extensive updates and revisions, reflects the current state of the science as well as the latest practices. Balancing theory with practice, the Fifth Edition covers such important topics as: Advances in the use of UV and ozone as disinfectants Alternative disinfectants such as chlorine dioxide, iodine, and bromine-related products Advanced oxidation processes for drinking water and wastewater treatment New developments and information for the production and handling of chlorine Latest regulations governing the use of different disinfectants For each disinfectant, the book explains its chemistry, effectiveness, dosing, equipment, and system design requirements. Moreover, the advantages and disadvantages of each disinfectant are clearly set forth. References at the end of each chapter guide readers to the primary literature for further investigation. Authored and reviewed by leading experts in the field of water and wastewater treatment, this Fifth Edition remains an ideal reference for utilities, regulators, engineers, and plant operators who need current information on the disinfection of potable water, wastewater, industrial water, and swimming pools.

Download or read book The Chlorine Dioxide Handbook written by Donald J. Gates and published by . This book was released on 1998 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Disinfection of Wastewater and Water for Reuse written by George Clifford White and published by . This book was released on 1978 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wastewater Disinfection written by and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Management of Legionella in Water Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-02-20 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Legionnaires' disease, a pneumonia caused by the Legionella bacterium, is the leading cause of reported waterborne disease outbreaks in the United States. Legionella occur naturally in water from many different environmental sources, but grow rapidly in the warm, stagnant conditions that can be found in engineered water systems such as cooling towers, building plumbing, and hot tubs. Humans are primarily exposed to Legionella through inhalation of contaminated aerosols into the respiratory system. Legionnaires' disease can be fatal, with between 3 and 33 percent of Legionella infections leading to death, and studies show the incidence of Legionnaires' disease in the United States increased five-fold from 2000 to 2017. Management of Legionella in Water Systems reviews the state of science on Legionella contamination of water systems, specifically the ecology and diagnosis. This report explores the process of transmission via water systems, quantification, prevention and control, and policy and training issues that affect the incidence of Legionnaires' disease. It also analyzes existing knowledge gaps and recommends research priorities moving forward.

Download or read book Health Risk Assessment written by and published by . This book was released on 1998 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Chlorine Dioxide as a Possible Disinfectant in Drinking Water Distribution Networks in Case of a Bioterrorism Attack written by Ahmed Amin Fouad Mohamed Hosni Aly Hassan and published by . This book was released on 2008 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The efficacy of chlorine dioxide as a disinfectant, in case of bioterrorism attack, in water networks was evaluated using Bacillus globigii as a surrogate to Bacillus anthracis, the main cause of anthrax. The efficacy of chlorine, the traditional disinfectant, was tested earlier and was shown to be deficient as a disinfectant in such a scenario. In a previous study, free available chlorine (FAC) concentrations were assessed to concentrations up to 75 mg/L and it was reported that the residual spore attachment after disinfection was 3.8x103 CFU/cm2. In this work, experiments in similar conditions to those carried out earlier by Szabo (2006) were conducted using chlorine dioxide as a disinfectant. The sectioning of biofilm depth into layers parallel to the substratum was also performed, prior to and during disinfection at concentrations of 15 and 25 mg/L chlorine dioxide, to study the attached spore stratification and change in viable spore fraction in each layer during disinfection. Preceding this, experiments were performed to assess the hypothesis of chlorine dioxide being a better disinfectant than chlorine and to establish a basis of comparison between chlorine and chlorine dioxide concentrations and attributes. Aqueous chlorine dioxide films on glass, plastic and aluminum, with and without surfactant, showed that the rate at which chlorine dioxide leaves the liquid phase to the gaseous phase was found to correlate with the film thickness. Chlorine dioxide was able to partition with and break through the caprylic acid layer at a very fast rate. These results supported the hypothesis that chlorine dioxide will not be hindered by extracellular polymeric substances (EPS) when disinfecting a biofilm layer. The bulk chlorine and chlorine dioxide experiments were performed with 1.0, 1.5 and 2.0 mg/L of both disinfectants in duplicates. Chlorine dioxide was able to achieve up to three log reductions of B. globigii in about two hours while chlorine reached 3 log reductions in 6 hours for 1.5 mg/L dosages. Data analysis using the Delayed Chick Watson model showed that both disinfectants experience a lag shoulder followed by a pseudo first order inactivation kinetics. The chlorine's lag shoulder, however, was one order of magnitude higher than that of chlorine dioxide. Watson plots showed that, for both disinfectants, exposure time and concentration play similar roles. Biofilm disinfection experiments were performed in duplicate at concentrations of 5, 10, 15 and 25 mg/L chlorine dioxide. The reduction in viable spore count reached 4 log reductions in periods up to 8 days, with residual spore count between 50 and 350 CFU/cm2 of coupon surface. The micro slicing study was performed before disinfection and during the disinfection phase with the 15 and 25 mg/L chlorine dioxide experiments. Prior to disinfection, the spores were almost equally distributed throughout the biofilm thickness. The slicing technique showed the ability of chlorine dioxide to start the disinfection simultaneously in all layers. The study also showed that a persistent population of spores was contained within the fourth layer in the 25 mg/L profile and within the second and fourth layers in the 15 mg/L profile. Chlorine dioxide performed as a better disinfectant in the scenario of a bioterrorism attack on drinking water networks. Better performance was shown in the bulk phase through a shorter lag period. It also showed the ability to act simultaneously on all biofilm layers and thus was less affected by rust and biofilm debris.

Download or read book Choosing Disinfection Alternatives for Water Wastewater Treatment Plants written by Frank R. Spellman and published by CRC Press. This book was released on 1999-06-29 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safe drinking water and effluent have long been dependent on the large-scale use of chlorine. Process Safety Management (PSM) and the Risk Management Program (RMP), safety regulations now enforced by OSHA and EPA are leading to serious reconsideration of chlorination as the preferred disinfection method. Renewed concern about the safety of chlorination by-products is also driving water and wastewater specialists and plant personnel to consider alternatives to traditional chlorine application. Choosing Disinfection Alternatives for Water/Wastewater Treatment is a practical explanation of all available disinfection technologies in light of management criteria: legal compliance, plant safety, effuent quality, and cost. This text is designed for all who must understand and act on the challenge of finding safe and equally effective methods of wastwater and water disinfection besides traditional chlorination.

Download or read book Chlorine Dioxide written by and published by American Water Works Association. This book was released on 2002 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water Treatment Manual written by and published by . This book was released on 19?? with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Results of an evaluation of the effectiveness of chlorine dioxide as a disinfectant for onsite household sewage treatement systems written by Christopher M. Kephart and published by . This book was released on 2011 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alternative Disinfectants and Oxidants Guidance Manual written by and published by . This book was released on 1999 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Distribution System Water Quality on Disinfection Efficacy written by Hé́lène Baribeau and published by American Water Works Association. This book was released on 2005 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Assesses the impact of dynamic water quality conditions in the distribution system on the inactivation of microorganisms in bulk water. Addresses questions about the usefulness of maintaining a secondary residual and the target level to be maintained. Bridges research related to distribution system water quality with that of microbial inactivation.

Download or read book Use of Chlorine Dioxide and Ozone for Control of Disinfection By products written by Peter Zhou and published by International Water Assn. This book was released on 2005 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal research objective, stated broadly