Development of a Catalytic Membrane Reactor for the Removal of Nitrate from Drinking Water PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Development of a Catalytic Membrane Reactor for the Removal of Nitrate from Drinking Water PDF full book. Access full book title Development of a Catalytic Membrane Reactor for the Removal of Nitrate from Drinking Water by G. Strukul. Download full books in PDF and EPUB format.
Author: G. Strukul
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 3
Get Book Here
Book Description
Author: G. Strukul
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 3
Get Book Here
Book Description
Author: S. Adham
Publisher: IWA Publishing
ISBN: 9781843398998
Category : Science
Languages : en
Pages : 0
Get Book Here
Book Description
The objectives of this project were to evaluate the performance of an innovative hydrogen-fed membrane biofilm reactor (MBfR) for nitrate and perchlorate removal, and identify the system operational and design parameters that affect the biological reduction process. The MBfR contained hollow-fiber membranes within a cylindrical module. Hydrogen was fed to the fibers filling the inside and passively diffusing through the membrane avoiding the formation of a hydrogen atmosphere and serving as an electron donor for the biofilm growing on the outside of the hollow fibers. The biofilm within the reactor was developed from the indigenous bacteria present in the groundwater and was not artificially inoculated or amended. Following the MBfR, an aeration process was employed to oxygenate the water in preparation for its introduction into a distribution system as a drinking water source. A subsequent media filter captured any sloughed biomass and provided a support for aerobic organisms to remove any residual dissolved hydrogen. Process Demonstration The MBfR process was demonstrated at pilot-scale to reduce perchlorate contaminated groundwater (55 ?g/L) to below the current 4 ?g/L California Department of Health Services (CaDHS) perchlorate action limit. The simultaneous removal of influent dissolved oxygen and nitrate to below detection limits was also observed. Their removal has been observed with the MBfR system operated at system flow rates corresponding to theoretical hydraulic residence times between 15 and 60 minutes. In addition, measured hydrogen consumption closely matches theoretical calculations based on stoichiometry and anaerobic biomass development. Microbial Ecology Bench-scale investigations into the microbial ecology of the mixed cultures in MBfRs revealed that perchlorate reducing bacteria (PCRB) were found to be present in a denitrifying system that had not been previously exposed to perchlorate. However, a dominant PCRB species increased from 14 to 21 percent of total bacteria when 100-?g/L perchlorate was added to the influent. Increasing perchlorate reduction led to further increases in the dominant PCBR and the perchlorate-removal capacity of MBfRs. Another important finding is that oxygen alone can serve as a primary acceptor for perchlorate reduction, and that the oxygen reduction appeared to be more favorable for perchlorate reduction than was nitrate reduction. Ultimately, full-scale application MBfR technology could effectively and economically be used to replace costly treatment technologies currently used by municipalities to treat perchlorate-contaminated drinking water sources. This research defined the critical parameters and operating conditions required for full-scale application and provided an extensive review of the critical water quality issues considered for drinking water by CaDHS and other state primacy agencies. In addition, this project has direct relevance to the application of biological treatment for the removal of nitrate (or other biologically reducible compounds) from contaminated groundwater. For a long time, biological denitrification has long been used in wastewater treatment, but not in drinking water treatment. Due to concerns about operating a biological process in a water treatment plant, nitrate removal in the United States has been largely limited to ion-exchange or membranes, both of which are expensive processes and can generate difficult to handle residuals. The results obtained in this study looked at simultaneous biological perchlorate removal and denitrification. Originally published by AwwaRF for its subscribers in 2004. This publication can be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
Author: Angelo Basile
Publisher: John Wiley & Sons
ISBN: 1118906802
Category : Technology & Engineering
Languages : en
Pages : 348
Get Book Here
Book Description
Uniquely focussed on the engineering aspects of membrane reactors Provides tools for analysis with specific regard to sustainability Applications include water treatment, wastewater recycling, desalination, biorefineries, agro-food production Membrane reactors can bring energy saving, reduced environmental impact and lower operating costs
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Madison Bertoch
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
Get Book Here
Book Description
Palladium-based bimetallic catalysts hold promise as an alternative water treatment technology for nitrate (NO3-), but practical application requires development of a flow-through reactor that efficiently delivers hydrogen (H2) from the gas phase into water, where it serves as the electron donor for NO3- reduction. In this work, a trickle bed reactor (TBR) was fabricated and evaluated to address this challenge. A series of batch experiments with Pd-In/[greek small letter gamma]-Al2O3 catalysts were conducted in excess H2 to identify a highly active catalyst for the TBR. A 0.1wt%Pd-0.01wt%In on 1 mm [greek small letter gamma]-Al2O3 catalyst was selected due to its high activity and support size that promotes a uniform liquid distribution in a packed bed. The TBR was packed with the same catalyst, and various liquid and gas flow rates were tested to evaluate apparent catalyst activity. Influent and effluent NO3- concentrations were used to calculate apparent zero-order rate constants, and they generally increased with H2 flow rate. Above 900 mL/min, a change in flow regime from pulse to bubble flow was observed, and the calculated zero-order rate constants decreased. An optimal catalyst activity in the TBR of 19.5 mg NO3-/min[bullet=black small circle]g Pd was obtained at a liquid flow rate of 900 mL/min and H2 flow rate of 320 sccm, which is ~22% of the activity obtained in the batch reactor by the same catalyst, indicating H2 mass transfer limitations. A reactive transport model was developed and used to quantify H2 mass transfer rate coefficients from the liquid to gas phase. Mass transfer coefficients initially decrease and then stabilize as the H2 flow rate increases. At elevated H2 flow rates, the highest mass transfer coefficients were obtained at the 900 mL/min liquid flow rate, in agreement with activity trends. Evaluation of a larger range of liquid and gas flow rates is warranted to determine if H2 mass transfer in the TBR can be further enhanced.
Author: Harriet Nash
Publisher: Springer
ISBN: 0412586207
Category : Science
Languages : en
Pages : 204
Get Book Here
Book Description
Groundwater quality monitoring and testing is of paramount importance both in the developed and developing world. This book presents a series of papers illustrating the varied nature of current research into groundwater quality. Urban and rural supplies are covered through a case history approach, and the importance of remedial action to prevent deterioration is emphasized.
Author: Bingzhi Dong
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110593157
Category : Technology & Engineering
Languages : en
Pages : 573
Get Book Here
Book Description
This book provides an up-to-date overview on the membrane technology for the drinking water treatment. The applications of PVDF-TiO2 nanowire hybrid ultrafiltration membrane, nanofiltration membrane, forward osmosis membrane, etc. in water treatment are discussed in detail. With abundant practical examples, the book is an essential reference for scientists, students and engineers in municipal engineering, environmental engineering, chemical engineering, environmental chemistry and material science.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Angelo Basile
Publisher: John Wiley & Sons
ISBN: 1118906829
Category : Technology & Engineering
Languages : en
Pages : 344
Get Book Here
Book Description
Uniquely focussed on the engineering aspects of membrane reactors Provides tools for analysis with specific regard to sustainability Applications include water treatment, wastewater recycling, desalination, biorefineries, agro-food production Membrane reactors can bring energy saving, reduced environmental impact and lower operating costs
Author: Angelo Basile
Publisher: Elsevier
ISBN: 044313877X
Category : Technology & Engineering
Languages : en
Pages : 304
Get Book Here
Book Description
Current Trends and Future Developments on (Bio)-Membranes: Recent Achievements in Chemical Processes in Membrane Reactors introduces and analyzes chemical processes done in membrane reactors. The book highlights their performance and provides an overview of recent achievements in structural development of membrane reactor systems during chemical processes. Starting from chemical processes aspects and fundamentals of membrane reactor systems, via modeling, experimental and design concepts, to practitioners’ perspective and good application examples, the book sheds light and gives a broad but very detailed view through a point-of-view typical of an industrial engineer. This is a key reference for R&D managers in industry interested in the development of chemical processes by membrane reactor technologies as well as academic researchers and postgraduate students working in the wider area of the strategic chemical, separation, and purification processes. Focuses on the best strategies for carrying out membrane reactor processes Analyzes critical aspects of conversion, selectivity, and yield in membrane reactor systems Includes all developments of transport phenomena/chemical kinetics in various chemical processes in membrane reactor systems Provides a practitioners’ perspective on the fundamentals, applications, modeling, experimental, and design concepts of membrane reactor systems
