Nutrient Removal and Greenhouse Gas Emissions from 20 Year Old Constructed Wetlands Receiving Tile Drainage Water: a Biogeochemical Analysis PDF Download
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Languages : en
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Author: Juan Pablo Silva Vinasco
Publisher: CRC Press
ISBN: 1000293203
Category : Science
Languages : en
Pages : 195
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Book Description
Ecotechnologies for wastewater treatment (EWWT) have been used as a cost-effective alternative to conventional wastewater treatment methods for improving the removal of organic carbon, nutrients and pathogenic microorganisms from wastewater. However, due to biochemical transformations of organic matter and nutrients EWWT are net sources of CO2, CH4 and N2O greenhouse gases (GHGs), which may be transferred into the atmosphere contributing to global warming. Greenhouse Gas Emissions from Ecotechnologies for Wastewater Treatment provides scientific information about greenhouse gas, such as CO2, CH4 and N2O, generation and emissions from different municipal EWWT. The main EWWT considered in this book are anaerobic ponds, facultative ponds, duckweed-based ponds, and a freshwater natural wetland perturbed by anthropogenic activities such as wastewater discharge and nutrients from agricultural run-off. The book includes a full literature review of recent publications about GHGs emissions from EWWT. It also introduces the calculation of GHGs flux using a static chamber technique. Besides, the book presents information on the influence of environmental factors such as temperature, pH, DO, and nutrients on GHG emissions produced in EWWT under tropical conditions. This book will be a useful reference for researches and students interested in the broader area of water and climate change subjects. The publication may also be of interest to policy makers concerned with climate change, water sector planning, and wastewater treatment.
Author: Karlen Hanke
Publisher:
ISBN:
Category : Agricultural chemicals
Languages : en
Pages : 100
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Book Description
Within the Great Lakes region, agricultural non-point source nitrogen (N) and phosphorus (P) contamination contribute to algal blooms and decreased water quality, particularly from tile-drained landscapes. These water quality challenges are accompanied by anthropogenically induced increases in greenhouse gases within the atmosphere, which are leading to changes in climate, which may in turn exacerbate water quality issues by changing hydrological and biogeochemical cycling. This may be particularly important during the non-growing season (NGS), during which most of the annual nutrient export and flow occurs in the Great Lakes region. However, hydrologic and biogeochemical processes during the NGS are less well understood compared to the growing season. The implementation of beneficial management practices (BMP) such as controlled tile drainage (CD) have the potential to mitigate both current and future water quality issues. However, there is little information on the potential water quality tradeoffs associated with this particular practice under both contemporary and future climates. Such information is necessary before CD may be widely recommended and adopted as a BMP. In this thesis, the Soil Water Assessment Tool (SWAT) model was used to demonstrate the potential for CD to reduce nutrient losses in midwestern Ontario, under both current and future climates, and to understand the processes affecting nutrient export responses through the analyses of the water balance, flow regimes, and weather patterns, and to examine seasonal differences in these variables. In this study, two Soil Water Assessment Tool (SWAT) models were applied at varying scales. One was generated for the Medway Creek watershed, near London, ON, to understand the impact of climate change on water quality and quantity by forcing the model with a bias corrected general circulation model (GCM) ensemble. The second SWAT model was run at the field scale, for a field site near Londesborough, ON to understand the potential water quality tradeoffs associated with CD for a field with low-sloped clay loam soil. Results indicate that future changes in climate will cause shifts in seasonal water budgets, resulting in much greater nutrient export during the NGS and an overall increase in annual nutrient losses by the 2080-2100 period. These changes will be driven by precipitation quantity, but also changing precipitation characteristics (timing, form, magnitude, and frequency) and temperature, which will influence runoff pathways. The use of CD will not mitigate water quality issues and will instead exacerbate TP losses in runoff by increasing soil moisture and consequently increasing surface runoff. Although reductions of tile flow were greater than the simulated increases in surface runoff, the approximately 10X greater TP concentrations in surface runoff resulted in an overall increase in simulated edge-of-field TP losses. This will be particularly problematic where CD is used both during the NGS and growing season. This thesis has provided an improved understanding of the impacts of climate change on water quality in the MCW, and has demonstrated that CD has little potential to mitigate water quality issues in the present or future. This thesis has also demonstrated that understanding nutrient export processes during the NGS will be increasingly important for increasing BMP efficacy, reducing NPS contamination, and the occurrence of harmful algal blooms.
Author: Christian Schaum
Publisher: IWA Publishing
ISBN: 1780408358
Category : Science
Languages : en
Pages : 592
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Book Description
This comprehensive book provides an up-to-date and international approach that addresses the Motivations, Technologies and Assessment of the Elimination and Recovery of Phosphorus from Wastewater. This book is part of the Integrated Environmental Technology Series.
Author: Houma Bachari Fouzia
Publisher: BoD – Books on Demand
ISBN: 1838808116
Category : Technology & Engineering
Languages : en
Pages : 170
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Book Description
Many of the pollutants discharged into the sea are directly or indirectly the result of human activities. Some of these substances are biodegradable, while others are not. This study is devoted to monitoring areas of the environment. Methods assessment is based on monitoring data and an evaluation of the impact of pollution.Surveillance provides a scientific basis for standards development and application. The methodology of marine pollution control is governed by algorithms and models. A monitoring strategy should be put in place, coupled with an environmental assessment concept, through targeted research activities in areas identified at local and regional levels. This concept will make it possible to diagnose the state of "health" of these zones and consequently to correct any anomalies. Monitoring of the marine and coastal environment is based on recent methods and validated after experiments in the field of marine pollution.
Author: P. A. Matson
Publisher: John Wiley & Sons
ISBN: 1444313819
Category : Science
Languages : en
Pages : 408
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Book Description
Trace gases are those that are present in the atmosphere at relatively low concentrations. Small changes in their concentrations can have profound implications for major atmospheric fluxes, and thereore, can be used as indicators in studies of global change, global biogeochemical cycling and global warming. This new how-to guide will detail the concepts and techniques involved in the detection and measurement of trace gases, and the impact they have on ecological studies. Introductory chapters look at the role of trace gases in global cycles, while later chapters go on to consider techniques for the measurement of gases in various environments and at a range of scales. A how-to guide for measuring atmospheric trace gases. Techniques described are of value in addressing current concerns over global climate change.
Author: Gabriela Dotro
Publisher: IWA Publishing
ISBN: 1780408765
Category : Science
Languages : en
Pages : 172
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Eutrophication
Languages : en
Pages : 258
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Author: Robert H. Kadlec
Publisher: IWA Publishing
ISBN: 9781900222051
Category : Science
Languages : en
Pages : 156
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Book Description
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
Author: Julie K. Cronk
Publisher: CRC Press
ISBN: 1420032925
Category : Nature
Languages : en
Pages : 484
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Book Description
A detailed account of the biology and ecology of vascular wetland plants and their applications in wetland plant science, Wetland Plants: Biology and Ecology presents a synthesis of wetland plant studies and reviews from biology, physiology, evolution, genetics, community and population ecology, environmental science, and engineering. It provides a
