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Efficiency of organic nitrogen fertilisation of potato in Northeast Portugal IPB - Escola Superior Agrária
Rodrigues, M.A.; Coutinho, João; Martins, F..
The study was conducted over a 4 year period with the purpose of measuring N mineralization using an in situ incubation technique, following the application of farmyard manure, poultry manure or municipal solid waste. The results varied from –10 % (net immobilization) to +28 % (net mineralization) in relation to the total organic N applied. N fluxes were assessed through plant N analysis during the growing season and through determination of potato tuber dry weight (TDW), N uptake by tubers and the apparent N recovery (ANR) of added N at harvest. Organic material applications slightly increased TDW above the control treatment (9 to 25%), although the results indicate a shortage of N, where no N was added to the crop. The effect of organic fertilization on...
Tipo: Article Palavras-chave: Farmyard manure; Municipal solid waste; Poultry manure; Nitrogen mineralization; Nitrogen uptake; Solanum tuberosum L..
Ano: 2001 URL: http://hdl.handle.net/10198/2205
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A Flexible Inventory Model for MSW Recycling AgEcon
Louis, Garrick; Shih, Jhih-Shyang.
Most of the United States have laws mandating the recycling of municipal solid waste (MSW). In order to comply, municipalities recycle quotas of materials, without regard to fluctuating prices. An inventory system is proposed that allows municipalities to be sensitive to materials prices as they recycle in accordance with state mandates. A dynamic model is developed; it uses historical secondary material prices as exogenous inputs to minimize the net present value of MSW recycling system cost. The model provides a cost-effective method for municipalities to achieve their MSW recycling targets. The savings is approximately $1.43 per ton of MSW generated based on total MSW management costs of $13.5 per ton. The model also allows one to investigate the...
Tipo: Working or Discussion Paper Palavras-chave: Municipal solid waste; Recycling; Inventory; Optimization; Environmental Economics and Policy; Q2.
Ano: 2002 URL: http://purl.umn.edu/10459
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Applying the Miceli Model to Explain Cooperation in Municipal Solid Waste Management AgEcon
Tiller, Kelly; Jakus, Paul M..
As traditional methods of municipal solid waste management (MSWM) become increasingly expensive due to increased regulation, many local governments are considering cooperation as a waste management strategy. A theoretical model is used to specify a partial observability probability model to analyze the decision Tennessee counties made to form either a single-county solid waste region or a multi-county region. We find that, while economies of scale may be a factor in the consolidation decision, similarities and differences between counties in current individual provision levels of solid waste services, ability to pay for services, and expectations for future solid waste service demands are statistically more important.
Tipo: Journal Article Palavras-chave: Regional cooperation; Municipal solid waste; Waste management; Regionalization; Public Economics.
Ano: 2005 URL: http://purl.umn.edu/10244
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Improved sanitary landfill design using recirculation of anaerobically treated leachates: generation of advanced design criteria Electron. J. Biotechnol.
Schiappacasse,María Cristina; Palma,Juan; Poirrier,Paola; Ruiz-Filippi,Gonzalo; Chamy,Rolando.
In Latin Americ a, the most accepted disposal systems for Municipal Solid Waste (MSW) are landfills, which nowadays have low rates of stabilization. The objective of this study was to develop design criteria for sanitary landfills which lead to a reduction in the stabilization times of MSW, based on experiment results obtain from a pre-pilot scale operation of two sanitary landfills (0.5 Ton), one with recirculation of leachates treated in an anaerobic digester and the other with recirculation of untreated leachates. This was complemented by another pilot scale sanitary landfill (1440 Ton) with recirculation of leaches treated in an anaerobic filter, and additionally by a computer simulation of leachate generation through the water balance of a theoretical...
Tipo: Journal article Palavras-chave: Hydrological balance; Landfill; Leachate recycle; Municipal solid waste; Stabilization.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000300009
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Using Matching Estimators to Evaluate the Effect of Unit-Based Pricing on Municipal Solid Waste Disposal AgEcon
Wright, Christopher; Halstead, John M..
The delivery of municipal services for the collection, transfer, and disposal of household solid waste is often provided by local governmental units; typically at the town or city level. Unit-based pricing, also known as pay-as-you-throw (PAYT), is a residential solid waste collection program requiring households to pay a fee per bag of trash disposed. Unit-based pricing represents a significant departure from the historical practice of financing solid waste service from property tax revenues in which the marginal cost to a household for disposing solid waste is effectively zero. Local governments are motivated to adopt unit-based pricing for the purpose of creating a financial incentive for households to reduce the quantity of solid waste disposed and...
Tipo: Conference Paper or Presentation Palavras-chave: Propensity score matching; Unit-based pricing; Pay-as-you-throw; Municipal solid waste; Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/103812
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Techno-economic assessment of municipal solid waste gasification for electricity generation: a case study of Kampala City, Uganda CIGR Journal
Bernard, Kivumbi.
This study was aimed at assessing the techno-economic potential of municipal solid waste (MSW) generated in Kampala City for electricity production through gasification. The quantity, characteristics and gasification parameters were determined. In addition, the gasifier- engine system components were sized, and an economic analysis was conducted to obtain the net present value (NPV) and the payback period. This study found that 523 t/d of MSW is collected in Kampala City. The biomass component of MSW was found to be 459.5 t/d with moisture content of 71.09% on as-received basis. The physical characteristics of the gasified biomass included 11.8% moisture content, 88.2% total solids, 25.9% ash content and 57.7 kg/m3 bulk density. The resulting normalized...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Municipal solid waste; Biomass; Gasification; Economic analysis; Producer gas; Electricity.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3363
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