Methane Oxidation in Landfill Cover Soils 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 Methane Oxidation in Landfill Cover Soils PDF full book. Access full book title Methane Oxidation in Landfill Cover Soils by Gunnar Borjesson. Download full books in PDF and EPUB format.
Author: Gunnar Borjesson
Publisher: Coronet Books
ISBN: 9789157652980
Category : Landfill gases
Languages : en
Pages : 110
Get Book Here
Book Description
Author: Gunnar Borjesson
Publisher: Coronet Books
ISBN: 9789157652980
Category : Landfill gases
Languages : en
Pages : 110
Get Book Here
Book Description
Author: Muna AlBanna
Publisher:
ISBN:
Category : University of Ottawa theses
Languages : en
Pages : 344
Get Book Here
Book Description
Author: Helene A. Hilger
Publisher:
ISBN:
Category : Landfill gases
Languages : en
Pages : 458
Get Book Here
Book Description
Author: David Kightley
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 42
Get Book Here
Book Description
Author: Koenraad Mahieu
Publisher:
ISBN: 9789059891548
Category :
Languages : en
Pages : 123
Get Book Here
Book Description
Author: Kittipon Chittanukul
Publisher:
ISBN: 9789742732899
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Niloofar Parsaeifard
Publisher:
ISBN:
Category : Global warming
Languages : en
Pages : 208
Get Book Here
Book Description
Methane (CH4) is one of the major greenhouse gases (GHG) generated in landfills and has a global warming effect 28 times more than carbon dioxide (CO2). Therefore, decreasing methane emissions into the atmosphere from landfills is critically important. In the upper portions of a landfill cover, methane is exposed to oxygen and oxidized aerobically to carbon dioxide while passing through the cover soil; this lowers the overall contribution of the landfill to climate change. However, because of the low permeability of the landfill cover, no aerobic oxidation occurs in the bottom of the cover because oxygen cannot penetrate to those depths. One possibility for increasing the overall oxidation of methane through landfill covers is to increase anaerobic oxidation of methane (AOM) in the lower depths. Although AOM has been studied by previous researchers in fresh water, sea water, and peat soil, no previous study has focused on AOM in landfill cover soil.In this study, anaerobic oxidation of methane (AOM) in the landfill cover soil was studied.Specific objectives were: 1. To evaluate the ability of alternate electron acceptors (besides oxygen) to facilitate anaerobic methane oxidation in clay soil, using batch tests. Different concentrations of the electron acceptors such as sulfate, nitrate, and iron were evaluated. 2. To study the effect of environmental conditions such as different moisture contents,nutrients, and methane concentrations on anaerobic oxidation of methane through batch tests, as well as the effect of methane generation inhibitor. 3. Using the most promising electron acceptor concentrations determined from Objective 1,to measure rates of anaerobic oxidation of methane in clay landfill covers via column tests, which includes realistic conditions of gas flow, cover thickness, and cover compaction. Compaction, permeability, sieve, hydrometer, liquid limit, plastic limit, and electronspectroscopy for chemical analysis tests were conducted to characterize the soil. Batch tests were conducted in 125 mL glass Wheaton bottles with 17 g soil. Electron acceptors (red mud containing iron, iron chloride, iron oxide, hematite, sodium nitrate, potassium nitrite, sodium sulfate, manganese oxide, and ammonium chloride) were added to the soil, along with water(20% or 47% moisture content), nutrient solution, and/or methane generation inhibitor, as appropriate. After flushing the reactors with nitrogen gas, landfill gas (LFG) (50% methane, 50%carbon dioxide) was injected. Methane concentration in the headspace of the reactors was measured over time using a gas chromatograph. Maximum oxidation rate was also calculated using Michaelis-Menten kinetics. Batch tests results showed that sulfate, nitrate, and a combination of sulfate+iron could remove more methane compared to the control test over the long-term and had higher maximum oxidation rates. Hence, they were chosen for testing in columns. Moreover, according to the batch tests, methane removal decreased in the reactors with no added nutrients, lower moisture content, and low initial concentration of methane. The results also showed that adding inhibitor increased methane removal in some reactors while it lowered AOM in other reactors.In columns, the soil was compacted to create a 2-foot layer of cover soil. Methane entered the column at a flux of 179.4 gCH4 m-2 day-1 from the bottom and passed through the cover.Oxidation rate was obtained by measuring methane concentration at the port, where gas entered the column, and at the end of the anoxic zone.The results of column tests showed that at a higher landfill gas flow rate, there was no significant difference in methane removal in the anoxic zone of the columns; however, at a lower flow rate, methane removal in the column amended with sulfate + iron had the highest (around 10%) removal of methane in the anoxic zone, followed by the column that contained sulfate. The results showed H2S gas at the headspace of these two columns, which indicated that sulfate reducing bacteria were likely responsible for methane removal in the anoxic zone of the columns.
Author: Raffaello Cossu
Publisher: Elsevier
ISBN: 0124078818
Category : Science
Languages : en
Pages : 1190
Get Book Here
Book Description
Solid Waste Landfilling: Concepts, Processes, Technology provides information on technologies that promote stabilization and minimize environmental impacts in landfills. As the main challenges in waste management are the reduction and proper treatment of waste and the appropriate use of waste streams, the book satisfies the needs of a modern landfill, covering waste pre-treatment, in situ treatment, long-term behavior, closure, aftercare, environmental impact and sustainability. It is written for practitioners who need specific information on landfill construction and operation, but is also ideal for those concerned about the possible return of these sites to landscapes and their subsequent uses for future generations. Includes input by international contributors from a vast number of disciplines Provides worldwide approaches and technologies Showcases the interdisciplinary nature of the topic Focuses on sustainability, covering the lifecycle of landfills under the concept of minimizing environmental impact Presents knowledge of the legal framework and economic aspects of landfilling
Author: Julie Thea Thomsen
Publisher:
ISBN:
Category :
Languages : en
Pages : 43
Get Book Here
Book Description
Author: Nathiya Tanthachoon
Publisher:
ISBN:
Category : Landfill final covers
Languages : en
Pages : 362
Get Book Here
Book Description
