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Eficiência de um sistema piloto de dessalinização de água salobra

Description: Article describes study which sought to evaluate the efficiency of pilot water desalination system treating brackish water which was obtained mixing fresh water and seawater up to reach 1,500 mg L-1 of total dissolved solids (TDS) concentration.
Date: March 16, 2020
Creator: Almeida, Juliano Penteado de; Kummer, Ana Carolina Barbosa; Carranza, Gabriel; Campos, Luiza Cintra; Széliga, Marcos Rogério; Acevedo, Miguel F. et al.
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Water Infrastructure Financing: History of EPA Appropriations

Description: The first section of this report includes a table that summarizes the history of appropriations for both wastewater and drinking water infrastructure programs. The next section discusses several historical developments in water infrastructure funding. The last section contains a detailed chronology of congressional activity regarding wastewater and drinking water infrastructure funding for each fiscal year since the 1987 CWA amendments.
Date: August 1, 2018
Creator: Ramseur, Jonathan L. & Tiemann, Mary
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federally Supported Water Supply and Wastewater Treatment Programs

Description: This report provides background information on the types of water supply and wastewater treatment projects traditionally funded by the federal government and the several existing programs to assist communities with water supply and wastewater treatment.
Date: April 26, 2018
Creator: Ramseur, Jonathan L.; Boyd, Eugene; Carter, Nicole T.; Cowan, Tadlock; Stern, Charles V.; Stubbs, Megan et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federally Supported Water Supply and Wastewater Treatment Programs

Description: This report provides background information on the types of water supply and wastewater treatment projects traditionally funded by the federal government and the existing programs to assist communities with water supply and wastewater treatment.
Date: November 28, 2017
Creator: Ramseur, Jonathan L.; Boyd, Eugene; Carter, Nicole T.; Cowan, Tadlock; Stern, Charles V.; Stubbs, Megan et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federally Supported Water Supply and Wastewater Treatment Programs

Description: This report provides background information on the types of water supply and wastewater treatment projects traditionally funded by the federal government and the several existing programs to assist communities with water supply and wastewater recycling and treatment.
Date: March 17, 2016
Creator: Copeland, Claudia; Carter, Nicole T.; Cody, Betsy A.; Stubbs, Megan & Tiemann, Mary
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Arduino Based Control System for a Brackish Water Desalination Plant

Description: Water scarcity for agriculture is one of the most important challenges to improve food security worldwide. In this thesis we study the potential to develop a low-cost controller for a small scale brackish desalination plant that consists of proven water treatment technologies, reverse osmosis, cation exchange, and nanofiltration to treat groundwater into two final products: drinking water and irrigation water. The plant is powered by a combination of wind and solar power systems. The low-cost c… more
Date: August 2015
Creator: Caraballo, Ginna
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Validation of an Integrated Hydrogen Energy Station

Description: This report presents the results of a 10-year project conducted by Air Products and Chemicals, Inc. (Air Products) to determine the feasibility of coproducing hydrogen with electricity. The primary objective was to demonstrate the technical and economic viability of a hydrogen energy station using a high-temperature fuel cell designed to produce power and hydrogen. This four-phase project had intermediate go/no-go decisions and the following specific goals: • Complete a technical ass… more
Date: October 26, 2012
Creator: Heydorn, Edward C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of Pulse Spark Discharges for Scale Prevention and Continuous Filtration Methods in Coal-Fired Power Plant

Description: The overall objective of the present work was to develop a new scale-prevention technology by continuously precipitating and removing dissolved mineral ions (such as calcium and magnesium) in cooling water while the COC could be doubled from the present standard value of 3.5. The hypothesis of the present study was that if we could successfully precipitate and remove the excess calcium ions in cooling water, we could prevent condenser-tube fouling and at the same time double the COC. The approa… more
Date: June 30, 2012
Creator: Cho, Young & Fridman, Alexander
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water Infrastructure Financing: History of EPA Appropriations

Description: The principal federal program to aid municipal wastewater treatment plant construction is authorized in the Clean Water Act (CWA). In appropriations legislation, funding for EPA (Environmental Protection Agency) wastewater assistance is contained in the measure providing funds for the Department of the Interior, Environment, and Related Agencies. This report summarizes, in chronological order, congressional activity to fund items in the State and Tribal Assistance Grants (STAG) account since 19… more
Date: January 30, 2012
Creator: Copeland, Claudia
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Final Report: Computer Simulation of Osmosis and Reverse Osmosis in Structured Membranes

Description: Molecular simulation methods were developed as part of this project to increase our fundamental understanding of membrane based separation systems. Our simulations clarified for example that steric (size) effects had a significant impact on the desalination membranes. Previously it was thought the separation was entirely driven by coulombic force (attractive/repulsive forces at the membrane surfaces). Steric effects played an important role, because salt ions in brackish water are never present… more
Date: January 3, 2012
Creator: Murad, Sohail
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Linking ceragenins to water-treatment membranes to minimize biofouling.

Description: Ceragenins were used to create biofouling resistant water-treatment membranes. Ceragenins are synthetically produced antimicrobial peptide mimics that display broad-spectrum bactericidal activity. While ceragenins have been used on bio-medical devices, use of ceragenins on water-treatment membranes is novel. Biofouling impacts membrane separation processes for many industrial applications such as desalination, waste-water treatment, oil and gas extraction, and power generation. Biofouling resul… more
Date: January 1, 2012
Creator: Hibbs, Michael R.; Altman, Susan Jeanne; Feng, Yanshu (Brigham Young University, Provo, Utah); Savage, Paul B. (Brigham Young University, Provo, Utah); Pollard, Jacob (Brigham Young University, Provo, Utah); Branda, Steven S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Process Design of Wastewater Treatment for the NREL Cellulosic Ethanol Model

Description: This report describes a preliminary process design for treating the wastewater from NREL's cellulosic ethanol production process to quality levels required for recycle. In this report Brown and Caldwell report on three main tasks: 1) characterization of the effluent from NREL's ammonia-conditioned hydrolyzate fermentation process; 2) development of the wastewater treatment process design; and 3) development of a capital and operational cost estimate for the treatment concept option. This wastew… more
Date: September 1, 2011
Creator: Steinwinder, T.; Gill, E. & Gerhardt, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Integrated Water Treatment Technology Solution for Sustainable Water Resource Management in the Marcellus Shale

Description: This Final Scientific/ Technical Report submitted with respect to Project DE-FE0000833 titled 'An Integrated Water Treatment Technology Solution for Sustainable Water Resource Management in the Marcellus Shale' in support of final reporting requirements. This final report contains a compilation of previous reports with the most current data in order to produce one final complete document. The goal of this research was to provide an integrated approach aimed at addressing the increasing water re… more
Date: April 30, 2011
Creator: Bruff, Matthew; Godshall, Ned & Evans, Karen
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

National Bioenergy Center Biochemical Platform Integration Project Quarterly Update, Number 28, Spring 2011

Description: Quarterly newsletter describing the activities of the National Bioenergy Center's Biochemical Platform Integration Project including ongoing research and goals. Issue topics: 33rd Symposium on Biotechnology for Fuels and Chemicals program sessions and special topic sessions; assessment of waste water treatment needs; and an update on new arabinose-to-ethanol fermenting Zymomonas mobilis strains.
Date: April 2011
Creator: National Renewable Energy Laboratory (U.S.)
Item Type: Refine your search to only Journal/Magazine/Newsletter
Partner: UNT Libraries Government Documents Department
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Cost Effective Recovery of Low-TDS Frac Flowback Water for Re-use

Description: The project goal was to develop a cost-effective water recovery process to reduce the costs and envi-ronmental impact of shale gas production. This effort sought to develop both a flowback water pre-treatment process and a membrane-based partial demineralization process for the treatment of the low-Total Dissolved Solids (TDS) portion of the flowback water produced during hydrofracturing operations. The TDS cutoff for consideration in this project is < 35,000 {approx} 45,000 ppm, which is th… more
Date: March 31, 2011
Creator: Henderson, Claire; Acharya, Harish; Matis, Hope; Kommepalli, Hareesh; Moore, Brian & Wang, Hua
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recovery of Water from Boiler Flue Gas Using Condensing Heat Exchangers

Description: Most of the water used in a thermoelectric power plant is used for cooling, and DOE has been focusing on possible techniques to reduce the amount of fresh water needed for cooling. DOE has also been placing emphasis on recovery of usable water from sources not generally considered, such as mine water, water produced from oil and gas extraction, and water contained in boiler flue gas. This report deals with development of condensing heat exchanger technology for recovering moisture from flue gas… more
Date: March 31, 2011
Creator: Levy, Edward; Bilirgen, Harun & DuPoint, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NASA Marshall Space Flight Center Improves Cooling System Performance: Best Management Practice Case Study #10: Cooling Towers (Fact Sheet)

Description: National Aeronautics and Space Administration's (NASA) Marshall Space Flight Center (MSFC) has a longstanding sustainability program that revolves around energy and water efficiency as well as environmental protection. MSFC identified a problematic cooling loop with six separate compressor heat exchangers and a history of poor efficiency. The facility engineering team at MSFC partnered with Flozone Services, Incorporated to implement a comprehensive water treatment platform to improve the overa… more
Date: February 1, 2011
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nanotechnology applications to desalination : a report for the joint water reuse & desalination task force.

Description: Nanomaterials and nanotechnology methods have been an integral part of international research over the past decade. Because many traditional water treatment technologies (e.g. membrane filtration, biofouling, scale inhibition, etc.) depend on nanoscale processes, it is reasonable to expect one outcome of nanotechnology research to be better, nano-engineered water treatment approaches. The most immediate, and possibly greatest, impact of nanotechnology on desalination methods will likely be the … more
Date: January 1, 2011
Creator: Brady, Patrick Vane; Mayer, Tom & Cygan, Randall Timothy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of Irrigating with Treated Oil and Gas Product Water on Crop Biomass and Soil Permeability

Description: Demonstrating effective treatment technologies and beneficial uses for oil and gas produced water is essential for producers who must meet environmental standards and deal with high costs associated with produced water management. Proven, effective produced-water treatment technologies coupled with comprehensive data regarding blending ratios for productive long-term irrigation will improve the state-of-knowledge surrounding produced-water management. Effective produced-water management scenari… more
Date: September 30, 2010
Creator: Brown, Terry; Morris, Jeffrey; Richards, Patrick & Mason, Joel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Safeguarding the Nation's Drinking Water: EPA and Congressional Actions

Description: The events of September 11, 2001, focused heightened attention on the security status of the nation's drinking water supplies and the vulnerability of this critical infrastructure sector to attack. This report reviews governmental and water utility efforts to improve drinking water security.
Date: September 30, 2010
Creator: Tiemann, Mary
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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TESTING GUIDELINES FOR TECHNETIUM-99 ABSORPTION ON ACTIVATED CARBON

Description: CH2M HILL Plateau Remediation Company (CHPRC) is currently evaluating the potential use of activated carbon adsorption for removing technetium-99 from groundwater as a treatment method for the Hanford Site's 200 West Area groundwater pump-and-treat system. The current pump-and-treat system design will include an ion-exchange (IX) system for selective removal of technetium-99 from selected wells prior to subsequent treatment of the water in the central treatment system. The IX resin selected for… more
Date: September 8, 2010
Creator: ME, BYRNES
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Computational and experimental platform for understanding and optimizing water flux and salt rejection in nanoporous membranes.

Description: Affordable clean water is both a global and a national security issue as lack of it can cause death, disease, and international tension. Furthermore, efficient water filtration reduces the demand for energy, another national issue. The best current solution to clean water lies in reverse osmosis (RO) membranes that remove salts from water with applied pressure, but widely used polymeric membrane technology is energy intensive and produces water depleted in useful electrolytes. Furthermore incre… more
Date: September 1, 2010
Creator: Rempe, Susan B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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