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Essential oil production of lemongrass (Cymbopogon citratus) under organic compost containing sewage sludge AGRIAMBI
d'Ávila,Júlia V.; Martinazzo,Ana P.; Santos,Fabiana S. dos; Teodoro,Carlos E. de S.; Portz,Adriano.
ABSTRACT One of the main urban polluting agents are the sewers, which even with proper treatment end up generating a polluting waste, the sewage sludge. One of the options for the disposal of this sludge is the use in agriculture, due to its high content of organic matter and nutrients. This study aimed to use urban sewage sludge for lemongrass cultivation and essential oil production. The plants were grown in soil containing different organic compost doses (0, 5, 10, 20, 40 and 60 t ha-1), formed from the sewage sludge composting process and waste of urban vegetation pruning. At harvest, plants were analyzed for the concentration of nutrients, chlorophyll content, number of tillers, biomass production, essential oil content and the microbiological quality...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solid waste; Medicinal plant; Composting; Mineral nutrition.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000900811
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Extended Product Responsibility: An Economic Assessment of Alternative Policies AgEcon
Palmer, Karen L.; Walls, Margaret.
Extended Product Responsibility embodies the notion that agents along a product chain should share responsibility for the life-cycle environmental impacts of the product, including those associated with ultimate disposal. Extended Producer Responsibility is a narrower concept which places responsibility on producers and focuses primarily on post-consumer waste disposal. Manufacturer "take-back" requirements are the policy lever most often associated with Extended Producer Responsibility. In this paper, we discuss alternative incentive-based policies that are consistent with the objectives of Extended Product and Producer Responsibility. We argue that an upstream combined product tax and recycling subsidy (UCTS) is generally more cost-effective and imposes...
Tipo: Working or Discussion Paper Palavras-chave: Solid waste; Extended product responsibility; Recycling; Unit pricing; Environmental Economics and Policy; Q2; H2.
Ano: 1999 URL: http://purl.umn.edu/10830
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Hydraulic conductivity and soil-sewage sludge interactions Rev. Bras. Ciênc. Solo
Ferreira,Silvio Romero de Melo; Oliveira,Joaquim Teodoro Romão de; Messias,Arminda Saconi; Silva,Hannelore Alves e; Nascimento,Aline Elesbão do; Feitosa,Maria Célia Alves.
One of the main problems faced by humanity is pollution caused by residues resulting from the production and use of goods, e.g, sewage sludge. Among the various alternatives for its disposal, the agricultural use seems promising. The purpose of this study was to evaluate the hydraulic conductivity and interaction of soil with sandy-silty texture, classified as Spodosols, from the Experimental Station Itapirema - IPA, in Goiana, state of Pernambuco, in mixtures with sewage sludge from the Mangueira Sewage Treatment Station, in the city of Recife, Pernambuco at rates of 25, 50 and 75 Mg ha-1. Tests were conducted to let water percolate the natural saturated soil and soil-sludge mixtures to characterize their physical, chemical, and microstructural properties...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solid waste; Soil physical and chemical properties; Environment.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500011
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Mathematical modeling for the management of the carrying capacity of aquaculture enterprises in lakes and reservoirs PAB
Bueno,Guilherme Wolff; Bureau,Dominique; Skipper-Horton,James Owen; Roubach,Rodrigo; Mattos,Flávia Tavares de; Bernal,Francisco Ernesto Moreno.
Abstract: Flooded areas of reservoirs and artificial lakes have been increasingly used for fish production; however, the waste generated by aquaculture has become a concern for the sustainable development of this activity. One of the main strategies adopted by management and regulatory agencies is the use of hydrodynamic models that calculate the carrying or nutrient load capacity of a particular water body and the effect of fish farming. These models are precise in the development of optimal strategies for feeding and waste calculation. This review paper addresses this topic and describes the methodology developed for the analysis and simulation of the carrying capacity for fish production, based on the integration of the Fish-PrFEQ nutritional...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrodynamic modeling; Mass balance; Nutritional bioenergetics; Solid waste; Sustainable aquaculture..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900695
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Organic compost and wastewater on the initial growth of oilseed plants AGRIAMBI
Pereira,Júlia S.; Guimarães,Jean P.; Lopes,Riuzuani M. B. P.; Farias,Maria S. S. de; Lima,Vera L. A. de; Azevedo,Carlos A. V. de.
ABSTRACT The study was conducted in two experiments in greenhouse of the CTRN/UFCG, aiming to evaluate the use of organic compost from household garbage and irrigation with treated domestic wastewater on the growth of castor bean 'BRS-188/Paraguaçu' and sunflower 'Embrapa 122-V2000'. Both experiments were conducted a randomized block design in 6 x 2 factorial scheme, with three replicates, which corresponded to six doses of organic compost (0, 1.2, 2.0, 2.8, 3.6 and 4.4 kg pot-1, equivalent to 0, 60, 100, 140, 180 and 220 kg N ha-1) and two types of water (freshwater and wastewater). It was found that the organic compost doses significantly influenced the growth of sunflower and castor bean in all evaluations, except for stem diameter. The maximum plant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Castor bean; Sunflower; Solid waste.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000600501
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Policies to Encourage Recycling and "Design for Environment": What to Do When Markets Are Missing AgEcon
Calcott, Paul; Walls, Margaret.
Several studies have shown the efficiency of both a Pigovian tax on waste disposal and a deposit-refund instrument, that is a combined output tax and recycling subsidy. The efficiency of these instruments, however, critically depends on households being paid for recycling. In reality, although most households have access to curbside recycling services, they are not paid for the items they set out at the curb. All items placed in a recycling bin are thus of equal value to a household, and there is no incentive for producers to make their products any more recyclable than what is necessary to be eligible for the bin. This paper characterizes the constrained (second-best) optimum that exists with the missing recycling market and solves for a modified...
Tipo: Working or Discussion Paper Palavras-chave: Solid waste; Regulatory policy; Regulatory design; Environmental Economics and Policy; H21; Q28.
Ano: 2000 URL: http://purl.umn.edu/10567
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Processo de gestão de resíduos sólidos na Embrapa Mandioca e Fruticultura do município de Cruz das Almas-BA. Repositório Alice
CONCEIÇÃO, K. S.; SOUZA, S. P..
Este trabalho teve como objetivo acompanhar o gerenciamento dos resíduos sólidos da Embrapa Mandioca e Fruticultura, no município de Cruz das Almas, Bahia de acordo com o modelo proposto no Plano de Resíduos Sólidos da Unidade, visando assim, minimizar a produção de resíduos e proporcionar aos mesmos, a adequada coleta, armazenamento, tratamento, transporte e destinação final
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Resíduo sólido; Cooperativa; Pesagem; Solid waste; Cooperatives.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1011012
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The Cost of Reducing Municipal Solid Waste AgEcon
Palmer, Karen L.; Sigman, Hilary; Walls, Margaret.
This paper explores public policies for reduction of municipal solid waste. We parameterize a simple model of waste disposal using supply and demand elasticities from the economics literature and 1990 prices and quantities of recyclable and recycled materials. Using this model, we calculate the waste reduction in response to three public policies: (i) deposit/ refunds, (ii) advance disposal fees, and (iii) recycling subsidies. The results illustrate the effects of the three policies on source reduction and recycling of five recyclable materials that comprise 56 percent of municipal solid waste: aluminum, glass, paper, plastic, and steel. The calculated responses provide information about the cost of reducing municipal solid waste through various policies....
Tipo: Working or Discussion Paper Palavras-chave: Solid waste; Deposit/refund; Recycling subsidy; Secondary materials; Environmental Economics and Policy; Q2; H2.
Ano: 1996 URL: http://purl.umn.edu/10898
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The Determinants of Household Recycling: A Material Specific Analysis of Recycling Program Features and Unit Pricing AgEcon
Jenkins, Robin R.; Martinez, Salvador A.; Palmer, Karen L.; Podolsky, Michael J..
This paper examines the impact of two popular solid waste programs on the percent recycled of several different materials found in the residential solid waste stream. We examine a unique, national, household-level data set containing information on the percent recycled of five different materials: glass bottles, plastic bottles, aluminum, newspaper, and yard waste. We find that access to curbside recycling has a significant and substantial positive effect on the percentage recycled of all five materials and that the level of this effect varies across different materials. The length of the recycling program's life has a significant and positive effect on two of the five materials and a mandatory recycling requirement does not affect any materials. The level...
Tipo: Working or Discussion Paper Palavras-chave: Solid waste; Recycling; Unit pricing; Incentives; Environmental Economics and Policy; Q28; H31.
Ano: 1999 URL: http://purl.umn.edu/10798
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Upstream Pollution, Downstream Waste Disposal, and the Design of Comprehensive Environmental Policies AgEcon
Walls, Margaret; Palmer, Karen L..
Many environmentalists and policymakers are shifting their focus from media-specific pollution problems to product-specific, life-cycle environmental problems. In this paper, we develop a model of production and consumption that incorporates life-cycle environmental externalities-specifically, an upstream manufacturing byproduct, air or water pollution from manufacturing, and downstream solid waste disposal. We then use the model to derive optimal government policies to address all three externalities. We assume throughout that a Pigovian tax on waste disposal is precluded because of the potential for illegal dumping. We then examine four cases: one in which Pigovian taxes on the upstream externalities are feasible, one in which such taxes are infeasible,...
Tipo: Working or Discussion Paper Palavras-chave: Life-cycle externalities; Solid waste; Deposit-refund; Environmental Economics and Policy; Q28.
Ano: 2000 URL: http://purl.umn.edu/10837
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