Download or read book Addition of GAC Caps and Ozonation to Conventional Filters for Improved Organics Control and Disinfection By product Reduction written by Emily Bridgehouse and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Granular activated carbon (GAC) caps are used in drinking water treatment facilities to help mitigate seasonal taste and odour events, however they may also provide additional water quality benefits, which have not been as widely examined. The objective of this pilot study was to compare filters utilizing GAC caps to conventional anthracite/sand filters in terms of disinfection by-product formation potential (DBP FP) reduction, organics removal and operational flexibility. Two different source waters (Otonabee River and Lake Erie) were examined such that differences in pre-treatment and organics composition may be considered. GAC caps employing biological and adsorptive filtration mechanisms, in combination with ozonation was observed to reduce HAA FP by 9±8 μg/L (12±10%) and DOC removal by 0.2 mg/L (6%) in Otonabee River samples. Application of GAC caps to the Lake Erie water system improved DOC reduction by 0.7±0.3 mg/L (44±17%) and DBP FP removal by 11±7 μg/L (33±19%) for HAAs and by 7±6 μg/L (23±17%) for THMs. As such, GAC caps may represent a cost-effective solution for facilities targeting specific components of regulatory importance.
Download or read book Pesticide Removal by Combined Ozonation and Granular Activated Carbon Filtration written by Ervin Orlandini and published by Routledge. This book was released on 2018-12-19 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research aimed to identify and understand mechanisms thar underlie the beneficial effect of ozonation on removal of pesticides and other micropollutants by Granular Activated Carbon (GAC) filtration. This allows optimization of the combination of these two processes, termed Biological Activated Carbon filtration. The study concluded that ozonation significantly improves removal of atrazine by GAC filtration not only due to the wellknown effect of oxidation of atrazine, but also due to the effect of partical oxidation of Background Organic Matter (BOM) present in water. Ozone-induced oxidation of BOM was found to improve adsorption of atrazine in GAC filters. Biodegradation of atrazine in these filters wasnot demonstrated. Higher GAC's adsorption capacity for atrazine and faster atrazine's mass transfer in filters with ozonated rather than non-ozonated influent were explained as due to ozonated BOM. Both can be attributed to enhanced biodegradability and reduced adsorbsbility of partially ozidated BOM compounds, resulting in their increased biodegradation and decreased adsorption in GAC filters.
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
Download or read book Evaluating Ozone and Granular Activated Carbon Treatment for Controlling of Disinfection By product Formation in a Central Florida Groundwater Supply written by Devon J. Higgins and published by . This book was released on 2021 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pilot investigation that compared ozone oxidation with an integrated ozone and granular activated carbon (GAC) process for the control of regulated disinfection by-products at the University of Central Florida’s water plant located at the Orlando campus has been completed. Treatment effectiveness was measured by monitoring the parameters pH, temperature, non-purgeable dissolved organic carbon (DOC), ultraviolet absorbance at a wavelength of 254 nm (UV254), specific ultraviolet absorbance (SUVA), excitation emission matrices (EEMs) and the associated formation of the DBP chemical groups total trihalomethanes (TTHMs) and haloacetic acids (HAAs). Groundwater that contained an average of 2.5 milligrams per liter (mg/L) DOC and 0.8 mg/L total sulfide was fed to a 15 gram/hour ozone contactor prior to being transferred to two parallel GAC pilot columns, each containing a different coal-based GAC material, either denoted Filtrasorb® (FS-400) or HPC-830 (HPC-830), with an apparent density of 0.54 and 0.36 grams per cubic centimeter, respectively. Stand-alone ozone treatment having an instantaneous ozone demand of 0.82 mg/L O3 provided a 6.0 mg/L O3 residual that when held for 30 minutes, followed by the addition of 5 mg/L Cl2 to represent disinfection, reduced 48-hour TTHM formation by 22 percent, however, increased 48-hour HAA formation by 67 percent. The integrated ozone-GAC process was found to consistently reduce 24-hour and 48-hour TTHM and HAA formation to below regulatory levels through the entirety of the 420 hours of operational run-time. Results for the integrated ozone-GAC process operating at a dose of 7.20 mg/L O3 both FS-400 and HPC-830 carbon types reached an average of 60% breakthrough for UV254 and DOC in the last 1000 bed volumes of the study. Projections with these results provided an estimated 30,000 EBV and 35,000 EBV for the FS-400 and HPC-830 carbon types, respectively, and could be achieved prior to bed DOC exhaustion.
Download or read book Analysis of Ozonation GAC Filtration at Fred Hervey Water Reclamation Plant for Disinfection By product Reduction written by Ravi Raj Yanamandala and published by . This book was released on 1994 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Use of Ozonation and Catalytic Ozonation Combined with Ultrafiltration for the Control of Natural Organic Matter NOM and Disinfection By products DBPS in Drinking Water written by Bhavana Sushilkumar Karnik and published by . This book was released on 2006 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Removal of Bromate and Perchlorate in Conventional Ozone GAC Systems written by Mary Jo Kirisits and published by American Water Works Association. This book was released on 2001 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimizing Ozonation for Turbidity and Organics TOC Removal by Coagulation and Filtration written by William C. Becker and published by American Water Works Association. This book was released on 1996-11 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ozone and GAC Treatment of a Central Florida Groundwater for Sulfide and Disinfectant By product Control written by Tara R. Lamoureux and published by . This book was released on 2013 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the combination of ozone and granular activated carbon (GAC) treatment for the removal of sulfide and disinfection byproduct (DBP) precursors in drinking water at the pilot-scale. The research conducted was performed at the Auxiliary (Aux) and Main Water Treatment Plants (WTPs) in Sanford, Florida. Both WTPs rely upon groundwater sources that contain total sulfide ranging from 0.02 to 2.35 mg/L and total organic carbon (TOC) ranging from 0.61 to 2.20 mg/L. The Aux WTP's raw water contains, on average, 88% more sulfide and 24% more TOC than the Main WTP. Haloacetic acids (HAA5) and total trihalomethanes (TTHMs) comprise the regulated forms of DBPs. HAA5 are consistently below the maximum contaminant level (MCL) of 60 [microgram]/L, while TTHM ranges from 70 to 110 [microgram]/L, at times exceeding the MCL of 80 [microgram]/L in the distribution system. Ozone alone removed total sulfide and reduced UV-254 by about 60% at the Aux Plant and 35% at the Main Plant. Producing an ozone residual of 0.50 mg/L prevented the formation of bromate while removing approximately 35 to 60% concentration of DBP precursors as measured by UV-254. Operating the GAC unit at an empty bed contact time (EBCT) of 10 minutes for the Aux Plant and 5.5 minutes for the Main Plant resulted in 75% and 53% of UV-254 reduction, respectively. The average 120 hour TTHM formation potential for the Aux and Main Plants were 66 [microgram]/L and 52 [microgram]/L, respectively, after treatment by ozone and GAC. GAC exhaustion was deemed to have occurred after seven weeks for the Aux Plant and eleven weeks for the Main Plant. The GAC columns operated in three phases: an adsorption phase, a transitional phase, and a biologically activated carbon (BAC) phase. The GAC adsorption phase was found to produce the lowest TTHMs; however, TTHMs remained less than 80 [microgram]/L during the BAC stage at each plant. BAC exhaustion did not occur during the course of this study. Ozone-GAC reduced chlorine demand by 73% for the Aux Plant and 10% for the Main Plant.
Download or read book Ozone Peroxide Advanced Oxidation in Combination with Biofiltration for Taste and Odour Control and Organics Removal written by Divyam Beniwal and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ozone (O3) prior to biofiltration can be an effective treatment strategy to achieve multiple drinking water quality goals. These goals include primary disinfection, improved removal of biodegradable organic carbon (generated as a result of ozonation), and oxidation of geosmin and MIB. However, O3 efficiency is dependent on source water characteristics, which impacts performance. This pilot study investigated the effectiveness of advanced oxidation incorporating O3 and hydrogen peroxide/ozone (H2O2/O3) with biofiltration (containing biologically active carbon (BAC) and anthracite) for geosmin and MIB control and disinfection by-product (DBP) precursor reduction. Application of 0.2 H2O2/O3 (mg/mg) prior to BAC resulted in optimal MIB and geosmin removal, especially in cold-water conditions (T = 10°C). In warmer temperatures (22°C), BAC alone was a suitable treatment technology for both geosmin and MIB. In terms of DBP precursor reduction, 0.1 H2O2/O3 (mg/mg) in combination with BAC was found to be the most effective treatment strategy with 37% THM and 10% HAA precursor reductions.
Download or read book Influence and Removal of Organics in Drinking Water written by Joel Mallevialle and published by CRC Press. This book was released on 1992-06-23 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use this new book to solve water treatment problems related to toxicity, taste and odor, and bacteria regrowth. Influence and Removal of Organics in Drinking Water presents the latest advances in oxidation technologies, ozonation, membrane technology, micropollutant removal, and filtration processes. Fundamental aspects of coagulation, flocculation, adsorption, ozonation, preozonation, and granular activated carbon are discussed. Filtration methods covered include biological filtration, membrane filtration, and ultrafiltration. The book will provide a useful reference for water treatment plant managers and operators, water engineers, water supply managers, and consultants.
Download or read book Pesticide Removal by Combined Ozonation and Granular Activated Carbon Filtration written by E. Orlandini and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Filtration Ozone and Activated Carbon written by and published by . This book was released on 2005 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technologies for Upgrading Existing Or Designing New Drinking Water Treatment Facilities written by and published by . This book was released on 1990 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical biological Implications of Using Chlorine and Ozone for Disinfection written by Robert M. Carlson and published by . This book was released on 1977 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry of Ozone in Water and Wastewater Treatment written by Clemens von Sonntag and published by IWA Publishing. This book was released on 2012-08-31 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Even though ozone has been applied for a long time for disinfection and oxidation in water treatment, there is lack of critical information related to transformation of organic compounds. This has become more important in recent years, because there is considerable concern about the formation of potentially harmful degradation products as well as oxidation products from the reaction with the matrix components. In recent years, a wealth of information on the products that are formed has accumulated, and substantial progress in understanding mechanistic details of ozone reactions in aqueous solution has been made. Based on the latter, this may allow us to predict the products of as yet not studied systems and assist in evaluating toxic potentials in case certain classes are known to show such effects. Keeping this in mind, Chemistry of Ozone in Water and Wastewater Treatment: From Basic Principles to Applications discusses mechanistic details of ozone reactions as much as they are known to date and applies them to the large body of studies on micropollutant degradation (such as pharmaceuticals and endocrine disruptors) that is already available. Extensively quoting the literature and updating the available compilation of ozone rate constants gives the reader a text at hand on which his research can be based. Moreover, those that are responsible for planning or operation of ozonation steps in drinking water and wastewater treatment plants will find salient information in a compact form that otherwise is quite disperse. A critical compilation of rate constants for the various classes of compounds is given in each chapter, including all the recent publications. This is a very useful source of information for researchers and practitioners who need kinetic information on emerging contaminants. Furthermore, each chapter contains a large selection of examples of reaction mechanisms for the transformation of micropollutants such as pharmaceuticals, pesticides, fuel additives, solvents, taste and odor compounds, cyanotoxins. Authors: Prof. Dr. Clemens von Sonntag, Max-Planck-Institut für Bioanorganische Chemie, Mülheim an der Ruhr, and Instrumentelle Analytische Chemie, Universität Duisburg-Essen, Essen, Germany and Prof. Dr. Urs von Gunten, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, and Ecole Polytechnique Federal de Lausanne, Lausanne, Switzerland.
Download or read book Controlling Disinfection By products and Microbial Contaminants in Drinking Water written by Robert M. Clark and published by DIANE Publishing. This book was released on 2001 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
