Aerobic biological pretreatment of municipal solid waste with a high content of putrescibles: effect on landfill emissions

2013 ◽  
Vol 31 (8) ◽  
pp. 783-791 ◽  
Author(s):  
Spyridoula Gerassimidou ◽  
Alexandros Evangelou ◽  
Dimitrios Komilis
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Biological Pretreatment ◽  
Landfill Emissions

Effect of plastic fragments on hydraulic characteristics of pretreated municipal solid waste

2006 ◽  
Vol 43 (12) ◽  
pp. 1333-1343 ◽  
Author(s):  
Mingliang Xie ◽  
Dirk Aldenkortt ◽  
Jean-Frank Wagner ◽  
Gerhard Rettenberger
Keyword(s):  
Fluid Flow ◽  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Conceptual Model ◽  
Hydraulic Properties ◽  
Thin Sheet ◽  
Biological Pretreatment ◽  
Soil Material

A systematic study was undertaken of the granular composition and hydraulic properties of municipal solid waste (MSW) produced by mechanical–biological pretreatment (MBP–MSW) from three different treatment plants with the aim of evaluating the potential application of MBP–MSW as an alternative barrier material for landfill final cover systems. Despite its coarse granular composition, MBP–MSW has low hydraulic conductivity. Long-term permeability tests show that the hydraulic conductivity decreases with time. The most likely explanation for the long-term changes in permeability is the swelling of organic material contained within the compost. In the case of saturated flow, the virtually impermeable plastic fragments embedded in the material impede fluid flow. In the unsaturated case, such fragments slow down the drying process by disrupting fluid flow and allowing pooling of water above horizontally oriented fragments. The larger the number and size of the plastic fragments, the greater the influence on hydraulic conductivity and shrinkage. These processes can be better understood with the newly developed conceptual model, the thin-sheet model. Based on this conceptual model, laboratory tests were undertaken to compare natural soil material with mixtures of soil material and plastic fragments. Corresponding numerical simulations of some experiments verified the influence of plastic fragments on the hydraulic properties of MBP–MSW.Key words: mechanical–biological pretreatment, municipal solid waste (MSW), thin-sheet model, plastic fragment, hydraulic conductivity, drying test.

scholarly journals The municipal solid waste landfill as a source of ozone-depleting substances in the United States and United Kingdom

2009 ◽  
Vol 9 (5) ◽  
pp. 22803-22831
Author(s):  
E. L. Hodson ◽  
D. Martin ◽  
R. G. Prinn
Keyword(s):  
United States ◽  
United Kingdom ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
The United States ◽  
Least Square ◽  
Industrialized Countries ◽  
Spatial Coverage ◽  
Landfill Emissions ◽  
National Estimates

Abstract. This study provides observation-based national estimates of CFC-11, CFC-12, CFC-113, and 1,1,1-trichloroethane emissions for the United States (US) and United Kingdom (UK) from municipal solid waste (MSW) landfills. The scarcity of national estimates has lead to the assumption that a significant fraction of the lingering ozone-depleting substance (ODS) emissions, which have been detected in industrialized countries, could be emitted from landfills. Spatial coverage was achieved through sampling at seven landfills in Massachusetts and through data provided by nine UK landfills. Linear least square regressions of recovered ODS vs. CH4 were used in combination with national estimates of landfill CH4 emissions to estimate 2006 national US and UK ODS landfill emissions. The ODS landfill emission estimates were then compared to recent estimates of total US and UK ODS emissions. US ODS landfill emissions were 0.4%–0.9% (0.006–0.09 Gg/year) of total US emissions. UK ODS landfill emission estimates were 1% (0.008 Gg/year) and 6% (0.03 Gg/year) of total UK CFC-11 and CFC-12 emissions, respectively. This indicates that landfills are only a minor source of lingering ODS emissions in the US, but may be more significant for CFC-12 emissions in the UK. The implications are that the majority of current ODS emissions in industrialized countries are likely coming from equipment still in use.

scholarly journals The municipal solid waste landfill as a source of ozone-depleting substances in the United States and United Kingdom

2010 ◽  
Vol 10 (4) ◽  
pp. 1899-1910 ◽  
Author(s):  
E. L. Hodson ◽  
D. Martin ◽  
R. G. Prinn
Keyword(s):  
United States ◽  
United Kingdom ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
The United States ◽  
Least Square ◽  
Industrialized Countries ◽  
Spatial Coverage ◽  
Landfill Emissions ◽  
National Estimates

Abstract. This study provides observation-based national estimates of CFC-11, CFC-12, CFC-113, and 1,1,1-trichloroethane emissions for the United States (US) and United Kingdom (UK) from municipal solid waste (MSW) landfills. The scarcity of national estimates has lead to the assumption that a significant fraction of the lingering ozone-depleting substance (ODS) emissions, which have been detected in industrialized countries, could be emitted from landfills. Spatial coverage was achieved through sampling at seven landfills in Massachusetts and through data provided by nine UK landfills. Linear least square regressions of recovered ODS vs. CH4 were used in combination with national estimates of landfill CH4 emissions to estimate 2006 national US and UK ODS landfill emissions. The ODS landfill emission estimates were then compared to recent estimates of total US and UK ODS emissions. US ODS landfill emissions are 0.4%–1% (0.006–0.09 Gg/year) of total US emissions. UK ODS landfill emission estimates are 1% (0.008 Gg/year) and 6% (0.03 Gg/year) of total UK CFC-11 and CFC-12 emissions, respectively. This indicates that landfills are only a minor source of lingering ODS emissions in the US, but may be more significant for CFC-12 emissions in the UK. The implication is that the majority of current ODS emissions in industrialized countries is likely coming from equipment still in use.

Evaluating landfill leachate treatment by organic municipal solid waste-derived biochar

2021 ◽  
Author(s):  
Matthew James Bentley ◽  
Michelle Solomon ◽  
Brooke Marten ◽  
Kyle Shimbaku ◽  
Sherri Cook
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Landfill Leachate ◽  
Organic Micropollutants ◽  
Organic Fraction ◽  
Leachate Treatment ◽  
Landfill Emissions ◽  
And Control

Transforming the organic fraction of municipal solid waste (OFMSW) into biochar to reduce fugitive landfill emissions and control organic micropollutants (OMP) during landfill leachate treatment could provide a new circular...

Biological pretreatment of municipal solid waste prior to landfilling

2013 ◽  
Vol 11 (4) ◽  
pp. 510-517
Keyword(s):  
Natural Convection ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Landfill Gas ◽  
Operating Conditions ◽  
Biological Pretreatment ◽  
Leachate Recirculation ◽  
Organic Matters ◽  
Factors Affecting ◽  
Pre Treatment

The conventional landfilling does not promote sustainable waste management due to uncontrolled emissions which potentially degrade the environment. In this regard, pre-treatment of municipal solid waste prior to landfilling significantly enhance waste stabilization and provides various advantages. So in this regard pre-treatment methods of municipal solid waste were investigated. The major objectives of biological pretreatment are to degrade most easily degradable organic matters of MSW in a short duration under controlled conditions so as to produce desired quality for landfill; and to enhance methanogenic condition in the landfill. Factors affecting the choice of pretreatment processes include the composition of MSW, retention times, odor emissions, fate of toxic chemicals and costs. To investigate the economical pretreatment method prior to landfilling for developing countries four pretreatment simulators were developed at bench scale in the laboratory at different operating conditions forced aeration and leachate recirculation (APSFALR), aerobic pretreatment simulator by natural convection of air with leachate recirculation (APSNCLR), aerobic pretreatment simulator by natural convection of air (APSNC) and anaerobic simulator (AS).The organic matter, pH, temperature, settlement, leachate quantity and quality were monitored regularly. In the leachate quality BOD5, COD, NH4-N, pH and trace metals were analyzed. The molecular size distribution of dissolved organic matters (DOM) in leachate was determined after the pretreatment of 45 days. The results of these methods are compared. The APSNCLR method is economically effective method to reduce the organic matters, leachate COD and BOD5. With the biological pretreatment significant amount of easily biodegradable matters and volume of solids are reduced due to the decomposition of the waste. Landfilling of pretreated waste improves landfill behavior, characteristics, and operation. Leachate quantity, quality and landfill gas emissions also would be reduced. It is predicted by the comparison of carbon content in the fresh and pretreated MSW that resultantly increases the landfill age and decreases in aftercare monitoring period. The volumes of the solids were reduced and density increased significantly in eight weeks pretreatment of MSW due to biodegradation of organic matters. The BOD, COD5 and NH4-N content also reduced significantly as compared to the anaerobic simulator. Pretreatment simulators results are compared and concluded that pretreatment with passive aeration and leachate recirculation is better as compared to the other pretreatment simulators.

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