Navegando por Assunto "Reaproveitamento (sobras, refugos, etc.)"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Geração de energia elétrica a partir dos resíduos do processo de beneficiamento do óleo de palma: uma abordagem sustentável para a recuperação de áreas degradadas no Estado do Pará
(Universidade Federal do Pará, 2017-01-16) KÜHL, Ricardo Marino; ROCHA, Brigida Ramati Pereira da; http://lattes.cnpq.br/9943372249006341
The deforestation, mainly verified in the Amazon region, has declined, but deforested areas, due to anthropic actions such as agriculture, or pastures opening, are still a hindrance, since the resilience process requires time to act. In this bias, the Agroecological Zoning, Production and Management of Oil Palm Culture in Amazon (ZAE-Dendê), evaluated the degraded areas in the Legal Amazon, aiming the palm plantation to recover them, based on the best practices. The present work goes beyond, evaluating the implantation of palm oil as a way of recovering degraded areas in Pará; the power generation from palm oil processing residues; as well as analyzing carbon dioxide reducing potential. The methodology used, covered the selection of degraded areas in Pará as the study area. Based on theoretical references some data were consolidate: the production of fresh fruits bunches (FFB) per hectare, the amount of waste per tonne of FFB, power generated from the residues and CO2 value fixation and emission. The results related to the CO2 emissions and fixation showed that the palm oil culture has the potential to reduce a range from 180 to 500 million tons of CO2eq., in addition to avoiding emission of 550 to 2,204 million tons of CO2eq., in a production cycle (25 years). The power generation potential verified from the anaerobic digestion of the liquid effluent range from 212 to 531 TWh during a palm oil production cycle. These data attests palm oil residues to become an alternative energy resource, as well as an alternative to degraded areas recovery. Therefore, this work is a subsidy for an Integrated Resource Planning elaboration.
Acesso aberto (Open Access)
Reciclagem como alternativa para a eficiência e sustentabilidade econômica do setor de resíduos sólidos urbanos no município de Belém-PA
(Universidade Federal do Pará, 2018-05-28) SANJAD, Heitor Capela; PEREIRA, José Almir Rodrigues; http://lattes.cnpq.br/9918600634569244
In the research, classified as descriptive and exploratory, the technical efficiency and economic sustainability of the solid urban waste (SUW) sector of the city of Belém - PA was evaluated. The research divided into three stages had in its first phase the execution of the legal, operational and financial diagnosis of the municipality. Then, in the second stage, scenarios were established to recycle 10%, 25% and 50% of MSW generated in the municipality in the year 2017. In the last stage, the sales prices of recyclables were determined and the economic prospects were estimated in the proposed scenarios, besides the evaluation of the financial benefit that the selective collection can bring the public finances. The generation of 340,405.39 tons SUW was verified in the city of Belém, as well as the existing need to update the laws, elaboration of the planning tools and reformulation of the forms of collection of the services provided in the sector. It was also observed that the implementation of recycling of 10%, 25% and 50% of the total RSU mass generated in 2017 would reduce operating expenses by R $ 11,302,703.66, R $ 8,256,759.16 and R $ 56,513,518.32, respectively, in the proposed scenarios. With the work it was possible to conclude that recycling is an excellent alternative to improve infrastructure and reduce expenses in the SUW sector of the municipality of Belém.