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Bioreactor landfill

About: Bioreactor landfill is a(n) research topic. Over the lifetime, 1184 publication(s) have been published within this topic receiving 28725 citation(s).
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Journal ArticleDOI
Abstract: The major potential environmental impacts related to landfill leachate are pollution of groundwater and surface waters. Landfill leachate contains pollutants that can be categorized into four groups (dissolved organic matter, inorganic macrocomponents, heavy metals, and xenobiotic organic compounds). Existing data show high leachate concentrations of all components in the early acid phase due to strong decomposition and leaching. In the long methanogenic phase a more stable leachate, with lower concentrations and a low BOD/COD-ratio, is observed. Generally, very low concentrations of heavy metals are observed. In contrast, the concentration of ammonia does not decrease, and often constitutes a major long-term pollutant in leachate. A broad range of xenobiotic organic compounds is observed in landfill leachate. The long-term behavior of landfills with respect to changes in oxidation-reduction status is discussed based on theory and model simulations. It seems that the somewhere postulated enhanced release of accumulated heavy metals would not take place within the time frames of thousands of years. This is supported by a few laboratory investigations. The existing data and model evaluations indicate that the xenobiotic organic compounds in most cases do not constitute a major long-term problem. This may suggest that ammonia will be of most concern in the long run.

1,857 citations

Journal ArticleDOI
01 Jun 2007-Renewable Energy
Abstract: Methane gas is a by-product of landfilling municipal solid wastes (MSW). Most of the global MSW is dumped in non-regulated landfills and the generated methane is emitted to the atmosphere. Some of the modern regulated landfills attempt to capture and utilize landfill biogas, a renewable energy source, to generate electricity or heat. As of 2001, there were about one thousand landfills collecting landfill biogas worldwide. The landfills that capture biogas in the US collect about 2.6 million tonnes of methane annually, 70% of which is used to generate heat and/or electricity. The landfill gas situation in the US was used to estimate the potential for additional collection and utilization of landfill gas in the US and worldwide. Theoretical and experimental studies indicate that complete anaerobic biodegradation of MSW generates about 200 Nm3 of methane per dry tonne of contained biomass. However, the reported rate of generation of methane in industrial anaerobic digestion reactors ranges from 40 to 80 Nm3 per tonne of organic wastes. Several US landfills report capturing as much as 100 Nm3 of methane per ton of MSW landfilled in a given year. These findings led to a conservative estimate of methane generation of about 50 Nm3 of methane per ton of MSW landfilled. Therefore, for the estimated global landfilling of 1.5 billion tones annually, the corresponding rate of methane generation at landfills is 75 billion Nm3. Less than 10% of this potential is captured and utilized at this time.

472 citations

Journal ArticleDOI
TL;DR: Additional research and technology development is needed before methane mitigation technologies utilizing microbial methane oxidation processes can become commercially viable and widely deployed.
Abstract: Landfill gas containing methane is produced by anaerobic degradation of organic waste. Methane is a strong greenhouse gas and landfills are one of the major anthropogenic sources of atmospheric methane. Landfill methane may be oxidized by methanotrophic microorganisms in soils or waste materials utilizing oxygen that diffuses into the cover layer from the atmosphere. The methane oxidation process, which is governed by several environmental factors, can be exploited in engineered systems developed for methane emission mitigation. Mathematical models that account for methane oxidation can be used to predict methane emissions from landfills. Additional research and technology development is needed before methane mitigation technologies utilizing microbial methane oxidation processes can become commercially viable and widely deployed.

405 citations

Journal ArticleDOI
TL;DR: Analysis and optimisation of the anaerobic digestion of the organic fraction of municipal solid waste and its role in bioreactor landfills.
Abstract: 1.Fundamentals of the anaerobic digestion process 2.Reactor sizing, process kinetics, and modelling of anaerobic digestionof complex waste 3.Analysis and optimisation of the anaerobic digestion of the organicfraction of municipal solid waste 4.Anaerobic digestion of the organic fraction of municipal solid waste:a perspective 5.Types of anaerobic digester for solid wastes 6.Characteristics of the OFMSW and behaviour of the anaerobic digestionprocess 7.Co-digestion of the organic fraction of municipal waste with otherwaste types 8.Pretreatments for the enhancement of anaerobic digestion of solidwastes 9.Use of hydrolysis products of the OFMSW for biological nutrientremoval in wastewater treatment plants 10.Products, impacts and economy of anaerobic digestion of OFMSW 11.Anaerobic digestion of organic solid waste in bioreactor landfills

357 citations

23 Sep 1997-
TL;DR: This book discusses the evolution of landfills for Waste Management Landfills as Bioreactors as well as the design of Landfill Treatment and Reclamation Strategies, and some of the strategies used to achieve this goal.
Abstract: Introduction Scope and Objectives The Evolution of Landfills for Waste Management Landfills as Bioreactors Regulatory Status Organization of the Book Modern Landfill Fundamentals Introduction Overview of Modern Sanitary Landfills Landfill Containment Systems Collection and Control of Leachate Leachate Collection and Storage Leachate and Gas Management at MSW Landfills Landfill Operation Strategies Landfill Bioreactor Studies Laboratory Scale Studies Pilot-Scale Bioreactor Studies Full-Scale Landfill Bioreactor Studies Summary Full-Scale Experiences with Bioreactor Landfills - Case Studies Introduction Southwest Landfill, Alachua County, Florida Central Facility Landfill, Worcester County, Maryland Winfield Landfill, Columbia County, Florida Pecan Row Landfill, Lowndes County, Georgia Lower Mount Washington Valley Secure Landfill, Conway, New Hamshire Coastal Regional Solid Waste Management Authority Landfill, Craven County, North Carolina Lemons Landfill, Stoddard County, Missouri Mill Seat Landfill, Monroe County, New York Yolo County Landfill, California Additional Full-Scale Efforts The Hydrodynamics of Leachate Recirculating Landfills Introduction Leachate Generation Moisture Movement Unsaturated Leachate Flow Mathematical Modeling of Leachate Recirculation Leachate Recirculation Field Testing The Impact of Leachate Recirculation of Leachate and Gas Characteristics Introduction Leachate Characteristics of Recirculating Landfills Leachate Treatment Implications Leachate Quantities Gas Production Landfill Bioreactor Design Introduction Liner/Leachate Collection System Leachate Storage Leachate Reintroduction Systems Leachate Recirculation System Design Final and Intermediate Caps Gas Collection Cell Construction Construction Costs Summary Landfill Bioreactor Operation Introduction Waste Characterization Oxidation Reduction Conditions Moisture Content Recirculation Strategies Effects of Waste Placement Rate Use of Old Cells Bioreactor Augmentation Daily and Intermediate Covers Settlement Monitoring When is the Waste Stable? Materials Recovery and Reuse from Bioreactor Landfills Introduction Landfill Treatment and Reclamation Strategies Mass Balance Design for Landfill Reclamation Methods of Landfill Reclamation Previous Experience with Landfill Reclamation Use of Reclaimed Materials Future Directions for Bioreactor Landfills References Index

341 citations

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No. of papers in the topic in previous years

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Topic's top 5 most impactful authors

Krishna R. Reddy

38 papers, 577 citations

Debra R. Reinhart

16 papers, 1.6K citations

Timothy G. Townsend

15 papers, 897 citations

Morton A. Barlaz

11 papers, 831 citations

Shi-Jin Feng

10 papers, 74 citations