Download or read book An Economic and Performance Evaluation of Air stripping and Granular Activated Carbon for the Removal of Organic Contaminants Based on Pilot and Full Scale Studies at Wausau WI written by James M. Miller and published by . This book was released on 1988 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1989 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimization and Economic Evaluation of Granular Activated Carbon for Organic Removal written by and published by Amer Water Works Assn. This book was released on 1989 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Granular Activated Carbon written by Clark and published by CRC Press. This book was released on 1989-10-01 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new book presents design, cost, and performance information on the application of GAC in drinking water, including the use of GAC both in the U.S. and overseas. Various design concepts for the unit operations that make up the GAC process are presented in 11 comprehensive, complete chapters, including a special chapter that provides cost equations and comparative cost studies for full scale application of GAC.
Download or read book A Pilot Plant Study on the Removal of Organic Contaminants from Drinking Water Using Granular Activated Carbon written by Dennis R. Weiss and published by . This book was released on 1980* with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Two stage Granular Activated Carbon Treatment written by Leon S. Directo and published by . This book was released on 1978 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feasibility Study of Granular Activated Carbon for Dissolved Organic Nitrogen Removal from Wastewater Treatment Plant Effluent written by Alexander R. Mayorga and published by . This book was released on 2016 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some wastewater treatment plants must meet very low concentrations of total nitrogen in their discharged water with the maximum daily load at Truckee Meadows Water Reclamation Facility (TMWRF) being 500 lbs/day for total nitrogen. For this project, data previously collected from influent and final effluent were analyzed to establish trends of dissolved organic nitrogen (DON) concentration and total organic nitrogen (TON) concentrations throughout the year. These measurements indicate significant portions of DON contributing to the TON in both influent and effluent samples; with the influent DON composing 44% of the influent TON, and the effluent DON composing 91.5% of the effluent TON. Treatment processes aimed at removing dissolved organic nitrogen may serve to reduce TON in the effluent and provide a factor of safety so treatment plants do not exceed daily limits of total nitrogen loads. Determining DON behavior throughout the treatment processes of TMWRF was accomplished by collecting samples from the influent, primary effluent, secondary effluent, denitrification effluent, and final effluent. DON concentrations varied greatly throughout the first three processes while denitrification and final effluent were the most stable and consistent having averages of 1.25±0.18 mg N/L and 1.21±0.19 mg N/L respectively. Granular activated carbon (GAC) was used as a treatment process for the removal of DON from the final effluent. Analysis for overall effectiveness of this approach includes testing seven GAC products from various suppliers and examining them using isotherm experimentation to determine amounts of DON removed from the final effluent. Based on the isotherm data, three products were selected for column testing. A final GAC product was then selected and used to optimize the column operational parameters. A 12-minute empty bed contact time (EBCT) with an aspect ratio of 30:1 exhibited the best performance and removed 29% of DON in the column life. The GAC adsorbed 6.17 mg-N for every gram of GAC when operated to 6,000 bed volumes. Microbial activity occurred in both column tests and may have metabolized some DON. Regeneration of GAC was performed thermally at 850 oC and chemically with formic acid. The regenerated GAC performance was analyzed using the Freundlich isotherm curve. An economic evaluation on a full-scale column operating was done using the column test results and design parameters. The economic evaluation was done for a column to treat 1 million gallons per day of final effluent from TMWRF and would have an estimated annual cost of $600,000 per year without regeneration. Adsorption of DON onto GAC has revealed to be effective and have potential for wastewater treatment at TMWRF.
Download or read book Cost Estimates for Removal of Total Organic Carbon and Disinfection By products Using Packed Tower Aeration and Granular Activated Carbon Adsorption written by James Helfrich and published by . This book was released on 2008 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study provides cost estimates of construction and operation for granular activated carbon (GAC) adsorption of total organic carbon (TOC), and packed tower aeration (PTA) for air stripping of trihalomethanes (THMs). Costs were developed by employing software published by the United States Environmental Protection Agency (USEPA) through its Drinking Water Research Division (DWRD). Cost estimation for both methods required preliminary GAC and PTA designs based on data collected in the field and from earlier published sources, as well as modifications to the software used in this study. The resultant designs were focused on compliance with certain aspects of the Stage 2 Disinfection By-Product Rule (Stage 2 DBPR) for THM and haloacetic acid (HAA) concentrations in drinking water. Formation of disinfection by-products (DBPs) occurs when natural organic matter (NOM) found in water sources reacts with disinfectants, typically chlorine based, that are used for the inactivation of water-borne pathogens. DBPs included several groups of compounds that, when ingested, are known to be carcinogenic and have been linked to other serious health effects. Two principle locations were used in this study to represent a medium system (serving 10,000 to 99,999 people) and a large system (serving 100,000 or more people). Overall system cost estimates for GAC adsorption were between 24 and 41 cents per 1000 gallons with an apparent economy of scale existing for larger systems. Investigations into GAC reactivation suggest that off-site reactivation is more cost effective for small to medium systems while some type of on-site reactivation would be a more cost effective method for larger systems. Overall PTA system cost estimates were between 8 and 9.6 cents per 1000 gallons. Both methods are effective at THM control while GAC adsorption has the added ability to reduce non-volatile DBPs and naturally occurring material (NOM), as well as reducing taste and odor problems if present.
Download or read book Performance Evaluation of Granular Activated Carbon System at Pantex Rapid Small scale Column Tests to Simulate Removal of High Explosives from Contaminated Groundwater written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A granular activated carbon (GAC) system is now in operation at Pantex to treat groundwater from the perched aquifer that is contaminated with high explosives. The main chemicals of concern are RDX and HMX. The system consists of two GAC columns in series. Each column is charged with 10,000 pounds of Northwestern LB-830 GAC. At the design flow rate of 325 gpm, the hydraulic loading is 6.47 gpm/ft[sup 2], and the empty bed contact time is 8.2 minutes per column. Currently, the system is operating at less than 10% of its design flow rate, although flow rate increases are expected in the relatively near future. This study had several objectives: Estimate the service life of the GAC now in use at Pantex; Screen several GACs to provide a recommendation on the best GAC for use at Pantex when the current GAC is exhausted and is replaced; Determine the extent to which natural organic matter in the Pantex groundwater fouls GAC adsorption sites, thereby decreasing the adsorption capacity for high explosives; and Determine if computer simulation models could match the experimental results, thereby providing another tool to follow system performance.
Download or read book In Place Electrically Heated Regeneration of Vapor Phase Activated Carbon written by and published by . This book was released on 1990 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force is using the air stripping process to remove a variety of volatile organic contaminants from groundwater. Vapor-phase granular activated carbon (GAC) has proven successful in treating the contaminated air stream emanating from air stripping columns. but conventional regeneration methods are expensive, require transfer of the carbon. and degrade the carbon. The objective of this experimental program was to determine the feasibility of using electrically-heated processes for the in-place regeneration of vapor-phase GAC. Two processes were considered, namely microwave heating and electric resistance heating using the carbon itself as the resistance. The microwave heating equipment used gave nonuniform heating over the length of the carbon column and was not pursued further. Electric resistance, or Rintoul, heating is a commercially proven process that has been applied to the high-temperature regeneration of liquid-phase GAC in special purpose furnaces. The experimental program demonstrated that the Rintoul process can be efficiently applied to low-temperature, low energy, in-place regeneration of vapor-phase GAO. Repeated loading and regeneration of the carbon column showed no loss of adsorption capacity. Two methods of collecting TCE in a concentrated form were also successfully tested. Both processes involved recovery of the TCE in a condensate. jg.
Download or read book Air Stripping Oxidation and Activated Carbon Adsorption Studies for Removal of Taste and Odor Organics from Water written by Shala Lalezary-Craig and published by . This book was released on 1987 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sefer ha me oref kolel she elot u teshuvot written by מוסס בן מנחם כנז and published by . This book was released on 1820 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Granular Activated Carbon Type on Adsorber Performance and Scale Up Approaches for Volatile Organic Compound Removal written by Meredith Elyse Fotta and published by . This book was released on 2012 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Removal of Organic Chemical Contaminants by Granular Activated Carbon written by Garry Reinhold Aronberg and published by . This book was released on 1977 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting the Performance of Activated Carbon Filters at Low Concentrations Using Accelerated Test Data written by Ali Khazraei Vizhemehr and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Activated Carbon Surface Chemistry and Pore Structure on the Adsorption of Trace Organic Contaminants from Aqueous Solution written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objectives of this research were (1) to identify activated pore structure and surface chemistry characteristics that assure the effective removal of trace organic contaminants from aqueous solution, and (2) to develop a procedure to predict the adsorption capacity of activated carbons from fundamental adsorbent and adsorbate properties. To systematically evaluate pore structure and surface chemistry effects on the adsorption of organic micropollutants from aqueous solution, a matrix of activated carbon fibers (ACFs) with three activation levels and four surface chemistry levels was prepared and characterized. In addition, three commercially available granular activated carbons (GACs) were studied to verify whether correlations developed for the ACF matrix are valid for adsorbents that are typically used for water treatment. BET surface area, pore size distribution, elemental composition, point of zero charge and infrared spectroscopy data were obtained to characterize the adsorbents. The results showed that the ACF matrix prepared in this study permits a fairly independent evaluation of surface chemistry and pore structure effects on organic contaminant adsorption from aqueous solution. Methyl tertiary-butyl ether (MTBE), a relatively hydrophilic adsorbate, and trichloroethene (TCE), a relatively hydrophobic adsorbate, served as adsorbate probes. To evaluate the effects of natural organic matter (NOM) on MTBE and TCE adsorption capacities, isotherm experiments were conducted in ultrapure water and Sacramento-San Joaquin Delta water. With respect to surface chemistry, both single-solute isotherms and isotherms in the presence of NOM indicated that hydrophobic adsorbents more effectively removed TCE and MTBE from aqueous solution than hydrophilic adsorbents. Enhanced water adsorption on polar surface sites explained the poorer performance of the hydrophilic adsorbents. Based on the elemental composition of the low-ash carbons evaluated in this study, act.
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:
