Download or read book Seasonal Aeration Assisted Nitrification in a Pilot scale Constructed Wetland written by Britany H. MacFarlane and published by . This book was released on 2014 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supplemental aeration may be a viable treatment strategy for ammonia removal in the treatment wetlands at the Arcata Wastewater Treatment Facility (AWTF). Aeration may ameliorate adverse effects of seasonal low temperatures and high loading rates on ammonia removal by facilitating nitrification. This work compares ammonia removal for three pilot-scale treatment wetland porosity configurations to determine if submerged surface area limits nitrification during aeration treatment and cold climate conditions. A 144 cubic foot hydraulic flume with an aspect ratio of 14:1 (length:width), and planted with mature emergent macrophytes was used for study. The pilot-scale treatment wetland was fed secondary treated wastewater from the Arcata Wastewater Treatment Facility. The lowest porosity configuration (porosity: 0.60) demonstrated the highest ammonia removal performance. Higher porosity configurations (porosity: 0.75 and 0.86) demonstrated lower ammonia removal and nitrite production, suggesting aeration assisted nitrification may be limited by submerged surface area. Baseline (pre-aeration) ammonia removal for the pilot and full-scale treatment wetlands was compared to evaluate scale-up potential of the pilot-scale aeration system. A lack of similitude between pilot and fullscale baseline treatment performance suggests that differences in internal carbon and nitrogen loading may constrain direct use of pilot-scale system results for full-scale aeration system design.
Download or read book Enhanced Nitrification in Constructed Wetlands Using Ion Exchange and Biological Regeneration written by Mark R. Knoff and published by . This book was released on 2000-10 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constructed wetlands built in northern climates do not adequately remove nitrogen, especially ammoniacal nitrogen, in the winter. Clinoptilolite, an ion-exchange crystal, can be used to store ammonium from wetland effluents during the colder winter months when nitrification is limited by environmental constraints. The ammonium-sorbed clinoptilolite can be biologically regenerated during the summer months, when conditions are more conducive for nitrification. Laboratory scale and pilot scale studies were conducted to prove this hypothesis and develop design criteria for a clinoptilolite supplemental system. Ultimately, two small pilot scale clinoptilolite columns were built that utilized an in-situ nitrifying biomass (Nitrosomonas and Nitrobacter) and draw and fill technology. The study showed that ammonium-sorbed clinoptilolite can be bioregenerated using tap water, an in-situ nitrifying biomass, and draw and fill aeration. The process can remove almost 100% of the adsorbed ammonium. The nitrifying biomass can remove at least 94% of the ammonium as nitrate at ambient temperatures as low as 14 degrees centigrade.. Oxygen utilization is extremely efficient in the draw and fill bioregeneration scheme. The nitrifying biomass utilized from 68 - 95% of the available oxygen to oxidize the ammonium adsorbed by the clinoptilolite during the initial stages of regeneration. In practice, a clinoptilolite bed system will reduce constructed wetland design requirements. The design can be optimized for year-round BOD removal and summer-time nitrogen removal which will reduce the CW size under normal municipal waste conditions. Theoretically, a clinoptilolite bed system coupled with a CW system can be used to remove almost 100% of the wetland's effluent ammonia during the six month adsorption phase. After the ammonia is converted to nitrate, the nitrate can be used to decrease the influent BOD concentration into the CW.
Download or read book Treatment Wetlands written by Gabriela Dotro and published by IWA Publishing. This book was released on 2017-11-15 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Overview of Treatment Wetlands; Fundamentals of Treatment Wetlands; Horizontal Flow Wetlands; Vertical Flow Wetlands; French Vertical Flow Wetlands; Intensified and Modified Wetlands; Free Water Surface Wetlands; Other Applications; Additional Aspects.
Download or read book Vertical Flow Constructed Wetlands written by Alexandros Stefanakis and published by Newnes. This book was released on 2014-06-26 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vertical flow constructed wetlands for wastewater and sludge treatment represent a relatively new and still growing technology. Vertical Flow Constructed Wetlands is the first book to present the state-of-the-art knowledge regarding vertical flow constructed wetlands theory and applications. In this book, you will learn about vertical flow systems with information about application and performance. Vertical Flow Constructed Wetlands also includes information on how different countries are applying the technology, with design guidelines to illustrate best practices worldwide. A focus on water conservation through reuse of treated water showcases the benefit of vertical flow construction, which has greatly increased the attractiveness of the technology in recent years. - All state-of-the-art knowledge regarding vertical flow constructed wetlands gathered in one book - A review of various constructed wetland approaches, including information about applications and performance, helps clarify what is currently known about constructed wetland principles and design - Discussion of how to manage the treated wastewater leaving the vertical flow for increasing biodiversity, providing food and habitat for birds, and producing harvestable biomass or crops - Includes case studies of constructed wetlands in developing countries
Download or read book Wastewater Treatment in Constructed Wetlands with Horizontal Sub Surface Flow written by Jan Vymazal and published by Springer Science & Business Media. This book was released on 2008-07-15 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wetlands have been used for uncontrolled wastewater disposal for centuries. However, the change in attitude towards wetlands during the 1950s and 1960s caused the minimization of the use of natural wetlands for wastewater treatment (at least in developed countries). Constructed wetlands have been used for wastewater treatment for about forty years. Constructed wetland treatment systems are engineered systems that have been designed and constructed to utilize the natural processes for removal of pollutants. They are designed to take advantage of many of the same processes that occur in natural wetlands, but do so within a more controlled environment. The aim of this book is to summarize the knowledge on horizontal s- surface flow constructed wetlands (HF CWs) and objectively evaluate their treatment efficiency under various conditions. The information on this type of wastewater treatment technology is scattered in many publications but a comprehensive summary based on world-wide experience has been lacking. The book provides an extensive overview of this treatment technology around the world, including examples from more than 50 countries and examples of various types of wastewater treated in HF CWs.
Download or read book Treatment Wetlands written by Robert H. Kadlec and published by CRC Press. This book was released on 2008-07-22 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely revised and updated, Treatment Wetlands, Second Edition is still the most comprehensive resource available for the planning, design, and operation of wetland treatment systems. The book addresses the design, construction, and operation of wetlands for water pollution control. It presents the best current procedures for sizing these syste
Download or read book Feasibility Design Criteria and O M Requirements for Small Scale Constructed Wetland Wastewater Treatment Systems written by S. Wallace and published by IWA Publishing. This book was released on 2006-07-31 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The expanding use of decentralized wastewater management has resulted in an increased interest in small-scale wetland treatment systems. However, there is limited information available on the use, distribution of and performance of these small-scale systems. The purpose of this study was to address this knowledge gap by developing criteria for the feasibility, design, operation, and maintenance of small-scale wetland treatment systems. Monitoring data from the assembled small-scale wetland database was used to develop sizing criteria for FWS and VSB wetlands. Loading rates and corresponding effluent quality were developed for BOD, TSS, TKN, phosphorus, and fecal coliform bacteria. Where there was adequate data, the variation in monthly vs. annual average effluent concentration was assessed to provide a factor-of-safety approach to wetland sizing. Information on internal processes, hydraulic design, operation, maintenance, cost, and industrial applications of constructed wetlands is also presented in this report.
Download or read book EPA 625 1 written by and published by . This book was released on 1976-04 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constructed Wetlands for Pollution Control written by Robert H. Kadlec and published by IWA Publishing. This book was released on 2000-03-31 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents a comprehensive up-to-date survey of wetland design techniques and operational experience from treatment wetlands. This book is the first and only global synthesis of information related to constructed treatment wetlands. Types of constructed wetlands, major design parameters, role of vegetation, hydraulic patterns, loadings, treatment efficiency, construction, operation and maintenance costs are discussed in depth. History of the use of constructed wetlands and case studies from various parts of the world are included as well. Constructed Wetlands for Pollution Control will be indispensable for wastewater treatment researchers and designers, decision makers in public authorities, wetland engineers, environmentalists and landscape ecologists. Contents Biological methods for the treatment of wastewaters Types of constructed wetland Aplications of the technology Framework for interpreting and predicting water quality improvement Mechanisms and results for water quality improvement Design Plants and planting System start-up Economics Case studies Scientific and Technical Report No.8
Download or read book Land Treatment Systems for Municipal and Industrial Wastes written by Ronald W. Crites and published by McGraw Hill Professional. This book was released on 2000-03-17 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: A-Z guide to soil/plant/microbe-based wastewatertreatment Engineers and planners eager to benefit from the costefficiencies and convenience of land treatment of waste will find practical guidelines in this comprehensive manual. It covers soil hydraulics, vegetation selection, site selection, field investigations, preapplication treatment and storage, and transmission and distribution of wastewater. You're introduced to: Design procedures and appropriate uses for each of the three land treatment processes: soils, plants, and microbiological agents Special attributes of food processing wastewater, with 6 case studies The use of biosolids produced by mechanical treatment systems as crop nutrients Options for preapplication treatment, including ponds and constructed wetlands Much more
Download or read book Nitrification and Denitrification in the Activated Sludge Process written by Michael H. Gerardi and published by John Wiley & Sons. This book was released on 2003-03-19 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrification and Denitrification in the Activated Sludge Process, the first in a series on the microbiology of wastewater treatment, comprises the critical topics of cost-effective operation, permit compliance, process control, and troubleshooting in wastewater treatment plants. Avoiding the technical jargon, chemical equations, and kinetics that typically accompany such texts, Nitrification and Denitrification in the Activated Sludge Process directly addresses plant operators and technicians, providing necessary information for understanding the microbiology and biological conditions that occur in the treatment process. Of special interest to wastewater treatment plant operators are the bacteria that degrade nitrogenous wastes–the nitrifying bacteria–and the bacteria that degrade carbonaceous wastes–the cBOD-removing bacteria. Both groups of bacteria need to be routinely monitored and operational conditions favorably adjusted to ensure desired nitrification. Each chapter in this groundbreaking study offers a better understanding of the importance of nitrification and denitrification and the bacteria involved in these crucial processes. Chapters include: Organotrophs The Wastewater Nitrogen Cycle Nitrite Ion Accumulation Dissolved Oxygen Denitrifying Bacteria Gaseous End Products Free Molecular Oxygen The Occurrence of Denitrification
Download or read book Phytoremediation of Emerging Contaminants in Wetlands written by Prabhat Kumar Rai and published by CRC Press. This book was released on 2018-03-15 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytoremediation with wetland plants is an eco-friendly, aesthetically pleasing, cost-effective, solar-driven, passive technique that is useful for cleaning up environmental pollutants with low to moderate levels of contamination.
Download or read book Manual constructed wetlands treatment of municipal wastewaters written by and published by DIANE Publishing. This book was released on with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index Medicus written by and published by . This book was released on 2003 with total page 1616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Life Cycle Assessment of Wastewater Treatment written by Mu. Naushad and published by CRC Press. This book was released on 2018-03-15 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Life Cycle Assessment of Wastewater Treatment addresses in detail the required in-depth life cycle assessment of wastewater treatment. This is to meet the special demands placed upon wastewater treatment processes, due to both the limited quantity and often low quality of water supplies. Wastewater management clearly plays a central role in achieving future water security in a world where water stress is expected to increase. Life cycle assessment (LCA) can be used as a tool to evaluate the environmental impacts associated with wastewater treatment and potential improvement options. This unique volume will focus on the analysis of wastewater treatment plants (WWTPs), using a life cycle assessment (LCA) approach. Key Features: Focuses on the analysis of wastewater treatment plants using a life cycle assessment (LCA) approach Discusses unconventional water sources such as recycled wastewater, brackish groundwater and desalinated seawater Explains life cycle assessment in detail, which has become one of the reference methods used to assess the environmental performance of processes over their complete life cycle, from raw material extraction, infrastructure construction and operation to final dismantling Explores a technique (LCA) that is becoming increasingly popular amongst researchers in the water treatment field nowadays because of its holistic approach Based on the real life experiences, the subject of wastewater is presented in simple terms and made accessible to anyone willing to learn and experiment
Download or read book A Pilot Study on Municipal Wastewater Treatment Using a Constructed Wetland in Uganda written by Tom Okia Okurut and published by CRC Press. This book was released on 2000-01-01 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates the use of constructed wetlands as a cheaper and more effective alternative method of treating domestic wastewater in tropical environments. This book determines the technical viability of the model, with respect to treatment performance under different operating conditions and the economic competitiveness of technology in Uganda and across the region. The Pilot Constructed Wetland investigated in this study was situated at the National Water and Swerage Corporation's Jinja Sewage Works at Kirinya, Uganda. The study revealed the economic viability of constructed wetland systems in the tropical regions. These could be established at competitive costs with waste stabilisation ponds.
Download or read book Constructed Wetlands for the Treatment of Landfill Leachates written by George Mulamoottil and published by CRC Press. This book was released on 1998-09-29 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constructed wetlands are proving to be the best natural treatment system for landfill leachates. Most of the contaminants in landfill leachates are degraded in treatment wetlands. Potential for long-term sustainability and significant cost savings are attractive features of this eco-technology. Documentation of the experience in this use of constructed wetlands has been limited. Constructed Wetlands for the Treatment of Landfill Leachates is the first compilation of the results of research from North America and Europe. Originally presented at an international symposium, this collection of papers offers the most recent research findings from the leading researchers in this new and innovative natural treatment system. Specific issues addressed in the text include: leachate characteristics, and the potential for treatability by constructed wetlands wetland treatment, processes and transformation use of constructed wetlands in cold climatic conditions assessment of the tolerance of wetland plants to the toxicity of leachates role of plants in the treatments of leachates integrated wetland systems performance of different wetland treatment systems cost comparisons of wetland technology vs. traditional treatment technologies The potential for environmental contamination due to leachates from landfills is increasing, and there is an urgent need to find ways and means to treat leachates in a sustainable way Constructed Wetlands for the Treatment of Landfill Leachates will provide an invaluable source of information on the subject for scientists, engineers, practitioners, policy makers, and regulatory officials.
