Download or read book Chemical and Structural Characterization of Material Formed in Constructed Wetlands Treated with Metal Based Coagulants and Their Effects on Wetland Vegetation written by Yan Ling Liang and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sacramento-San Joaquin Delta (Delta) provides two-thirds of the drinking water used by Californians. Various issues affecting water quality have resulted from the regions agricultural activities. There is a need to mitigate the effect of agricultural practices to meet ever increasingly strict regulations on drinking water quality and in conserving this resource. An on-site coagulation wetland system was implemented to reduce dissolved organic carbon (DOC) in the agricultural drainage water being released back into the Delta channels. This model wetland system was used to assess DOC removal effectiveness, coagulated material stability and vegetative health impacts of on-site coagulation water treatment on Delta islands. Two coagulation treatments were studied, polyaluminum chloride (PAC) and ferric sulfate (FeSO4), and compared to a control treatment, which did not receive any coagulants. Results from these investigations provided a better understanding of the substances produced by on-site coagulation systems and the systems’ viability to be used for water treatment and carbon sequestration purposes without negatively impacting native Typha spp. populations. The first study investigated the nature of control material, PAC and FeSO4 coagulated materials being formed upon coagulation and collected in sediment traps and at inflows to tests the hypothesis that PAC and FeSO4 coagulation will result in coagulated materials that are similar to control material in size, component and structure but differ in elemental nature. The second study investigated the bonding nature of coagulant metals to organic matter and comparisons were made to control material (inflow flocs and sediment trap material). This second study tested the hypotheses that PAC and FeSO4 coagulated materials (sediment trap material and inflow flocs) will consist of the similar functional groups as control material, and both coagulants will bind to organic matter through similar mechanisms. The last study investigated the effect of coagulated material accumulation on Typha spp. populations within the constructed wetlands to test the hypotheses that coagulation will not reduce nutrient availability to support Typha growth over two growing cycles and soil nutrient content will be correlated to plant biomass, allometrics and nutrient content. These studies demonstrated that control material, PAC and FeSO4 coagulated material were similar in their component composition and particle size, but differed slightly in structural and chemical aspects. PAC sediment trap material was found to be more stable compared to FeSO4 sediment trap material under conditions studied. PAC sediment trap material was unlikely to re-disperse back into solution when subjected to long term reducing redox conditions. Coagulation treatment with PAC and FeSO4 were demonstrated to be viable options for on-site water treatment that will not disrupt the normal growth of Typha populations over a two-year period. This body of research supported the use of both PAC and FeSO4 for the use in on-site coagulation wetland systems for the dual purpose of wetland restoration and water treatment for a continuous period of two years. These coagulation systems represent a feasible option for complying with agricultural drainage water regulations and in helping improve the water quality of the Delta channels.
Download or read book A System Dynamics Model of the Bioavailability of Metals in Constructed Wetland Sediment written by Timothy S. Wood and published by . This book was released on 2007 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constructed wetlands used for storm water treatment accumulate metals primarily in their sediment. This sediment has the potential to produce toxic effects in benthic organisms at some period in time. Bioavailability of metals in sediment is directly linked to pore water metal activity. The mechanisms that influence pore water metal activity are included in physical, chemical, and biological processes. A system dynamics model was developed to represent these processes and the major influences affecting pore water metal activity in a treatment wetland receiving storm water influent. The model structure and behavior was tested and validated using several system dynamics validation techniques. The model was run using the metals Pb, Cu, and Cd. The model indicated that the chemical processes of acid-volatile sulfide (AVS) and organic carbon in binding metal in reduced sediment were the greatest influences in controlling metal bioavailability. The effect of bioturbation, as represented in the model, was negligible. Amount of organic carbon in the sediment seems to play the greatest role in controlling metal bioavailability in the long run. This model provides a platform for guiding future research in sediment toxicology, specifically in treatment wetlands.
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 Aquatic Organic Matter Fluorescence written by Paula G. Coble and published by Cambridge University Press. This book was released on 2014-07-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: A core text on principles, laboratory/field methodologies, and data interpretation for fluorescence applications in aquatic science, for advanced students and researchers.
Download or read book Coagulation and Flocculation in Water and Wastewater Treatment written by John Bratby and published by IWA Publishing. This book was released on 2016-04-15 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coagulation and Flocculation in Water and Wastewater Treatment provides a comprehensive account of coagulation and flocculation techniques and technologies in a single volume covering theoretical principles to practical applications. Thoroughly revised and updated this new edition has been progressively modified and increased in scope to cater for the requirements of practitioners involved with water and wastewater treatment. New topics in this new edition include : • activated sludge bulking and foaming control and enhanced bioflocculation; • algae removal and harvesting; • dissolved organic nitrogen (DON) removal; • inorganics removal; • turbidity and its measurement; • wastewater treatment by coagulation and chemically enhanced primary treatment (CEPT). The book presents the subject logically and sequentially from theoretical principles to practical applications. Successive chapters deal with, in turn, properties of materials present in waters and wastewaters; characteristics and types of coagulants commonly in use; mechanisms and practical implications of destabilization of waterborne material using metal coagulants and polyelectrolytes; considerations and requirements for coagulant addition at the rapid mixing stage; theoretical and practical considerations of flocculation; and details of experimental procedures for assessing primary coagulants, flocculant aids, sludge conditioners, and flocculation parameters. Numerous examples are included as appropriate. Treatment and disposal of sludges resulting from coagulation-flocculation related operations is dealt with in an Appendix. This important topic has been separated from the main text to avoid disturbing the continuum of the presentation. Coagulation and Flocculation in Water and Wastewater Treatment is a readable and useful resource for the water scientist and engineer. It is a convenient reference handbook providing numerous examples and appended information and it is a vital text for course material for undergraduate and postgraduate students.
Download or read book Soil Survey of Sacramento County California written by Arlene J. Tugel and published by . This book was released on 1993 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Peatlands and Climate Change written by Maria Strack and published by . This book was released on 2008 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Peat Society IPS established a joint IPS Working Group on Peatlands and Climate Change in the end of the year 2005. The Working Group's task was to compile information into a summary of available knowledge to help the IPS and other actors to understand the role of peatlands and peat within the current context of global climate change.
Download or read book Coagulation and Flocculation in Water and Wastewater Treatment written by John Bratby and published by IWA Publishing. This book was released on 2006-10-15 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coagulation and Flocculation in Water and Wastewater Treatment provides a comprehensive account of coagulation and flocculation techniques and technologies in a single volume covering theoretical principles to practical applications. Thoroughly revised and updated since the 1st Edition it has been progressively modified and increased in scope to cater for the requirements of practitioners involved with water and wastewater treatment. A thorough gamut of treatment scenarios is attempted, including turbidity, color and organics removal, including the technical aspects of enhanced coagulation. The effects of temperature and ionic content are described as well as the removal of specific substances such as arsenic and phosphorus. Chemical phosphorus removal is dealt with in detail, Rapid mixing for efficient coagulant utilization, and flocculation are dealt with in specific chapters. Water treatment plant waste sludge disposal is dealt with in considerable detail, in an Appendix devoted to this subject. Invaluble for water scientists, engineers and students of this field, Coagulation and Flocculation in Water and Wastewater Treatment is a convenient reference handbook in the form of numerous examples and appended information.
Download or read book Treatment of Heavy Metals in Constructed Wetlands written by Poh Eng Lim and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wetland Technology written by Guenter Langergraber and published by IWA Publishing. This book was released on 2019-10-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water quality standards across the world are being re-written to promote healthier ecosystems, ensure safe potable water sources, increased biodiversity, and enhanced ecological functions. Treatment wetlands are used for treating a variety of pollutant waters, including municipal wastewater, agricultural and urban runoff, industrial effluents, and combined sewer overflows, among others. Treatment wetlands are particularly well-suited for sustainable water management because they can cope with variable influent loads, can be constructed of local materials, have low operations and maintenance requirements compared to other treatment technologies, and they can provide additional ecosystem services. The technology has been successfully implemented in both developed and developing countries. The first IWA Scientific and Technical Report (STR) on Wetland Technology was published in 2000. With the exponential development of the technology since then, the generation of a new STR was facilitated by the IWA Task Group on Mainstreaming Wetland Technology. This STR was conceptualized and written by leading experts in the field. The new report presents the latest technology applications within an innovative planning framework of multi-purpose wetland design. It also includes practical design information collected from over twenty years of experience from practitioners and academics, covering experiments at laboratory and pilot-scale up to full-scale applications. Scientific and Technical Report No.27
Download or read book Anaerobic Digestion Processes written by Nigel Horan and published by Springer. This book was released on 2018-04-18 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents new application processes in the context of anaerobic digestion (AD), such as phosphorus recovery, microbial fuel cells (MFCs), and seaweed digestion. In addition, it introduces a new technique for the modeling and optimization of AD processes. Chapters 1 and 2 review AD as a technique for converting a range of organic wastes into biogas, while Chapter 3 discusses the recovery of phosphorus from anaerobically digested liquor. Chapters 4 and 5 focus on new techniques for modeling and optimizing AD. Chapters 6 and 7 then describe the state of the art in AD effluent treatment. The book’s final three chapters focus on more recent developments, including microbial fuel cells (MFCs) (Chapter 8), seaweed production (Chapter 9), and enzyme technologies (Chapter 10).
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 Nano and Bio Based Technologies for Wastewater Treatment written by Elvis Fosso-Kankeu and published by John Wiley & Sons. This book was released on 2019-05-21 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents recent challenges related to new forms of pollution from industries and discusses adequate state-of-the-art technologies capable to remediate such forms of pollution. Over the past few decades the boom in the industrial sector has contributed to the release in the environment of pollutants that have no regulatory status and which may have significant impact on the health of humans and animals. These pollutants also referred to as "emerging pollutants", are mostly aromatic compounds which derive from excretion of pharmaceutical, industrial effluents and municipal discharge. It is recurrent these days to find water treatment plants which no longer produce water that fits the purpose of domestic consumption based on newly established guidelines. This situation has prompted water authorities and researchers to develop tools for proper prediction and control of the dispersion of pollutants in the environment to ensure that appropriate measures are taken to prevent the occurrence of outbreaks due to sudden load of these pollutants in the water system. The chapters in this book cover a wide range of nano and bio-based techniques that have been designed for the real time detection of emerging contaminants in environmental water sources, geochemical models that are continuously improved for the prediction of inorganic contaminants migration from the mine solid wastes into ground and surface waters. Remediation strategies are also discussed and include effective techniques based on nanotechnology, advanced membrane filtration, oxidative and bio-degradation processes using various types of nanocatalysts, biocatalysts or supporting polymer matrices which are under advanced investigations for their implementation at large scale for the removal of recalcitrant pollutants from polluted water. Nano and Bio-Based Technologies for Wastewater Treatment: Prediction and Control Tools for the Dispersion of Pollutants in the Environment is divided is two sections. The first section covers the occurrence of emerging pollutants in environmental water while the second section covers state-of-the-art research on the removal of emerging pollutants from water using sustainable technologies. A total of 13 chapters addressing various topics related to the two sections are essentially based on recent developments in the respective field which could have a significant impact on the enhancement of the performance of wastewater treatment plants around the world, and especially in developing countries where access to clean and safe water remains a daily challenge.
Download or read book Subsurface Flow Constructed Wetlands for Wastewater Treatment written by Sherwood C. Reed and published by . This book was released on 1993 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Water Recharge Using Waters of Impaired Quality written by National Research Council and published by National Academies Press. This book was released on 1994-02-01 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: As demand for water increases, water managers and planners will need to look widely for ways to improve water management and augment water supplies. This book concludes that artificial recharge can be one option in an integrated strategy to optimize total water resource management and that in some cases impaired-quality water can be used effectively as a source for artificial recharge of ground water aquifers. Source water quality characteristics, pretreatment and recharge technologies, transformations during transport through the soil and aquifer, public health issues, economic feasibility, and legal and institutional considerations are addressed. The book evaluates three main types of impaired quality water sourcesâ€"treated municipal wastewater, stormwater runoff, and irrigation return flowâ€"and describes which is the most consistent in terms of quality and quantity. Also included are descriptions of seven recharge projects.
Download or read book Hydrologic Treatments Affect Gaseous Carbon Loss from Organic Soils Twitchell Island California October 1995 December 1997 written by Robin L. Miller and published by . This book was released on 2000 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
