Valorisation of solid waste as key opportunity for green city development in the growing urban areas of the developing world

Fetene, Yohannis; Addis, Taffere; Beyene, Abebe; Kloos, Helmut

doi:10.1016/j.jece.2018.11.023

Cited by 26 publications

(14 citation statements)

References 31 publications

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“…Em áreas em desenvolvimento ou pouco desenvolvidas, a economia circular também é apresentada como potencial para a valorização do lixo. Porém, com o intuito de amenizar uma problemática de maior proporção, dado que muitos países na África e na Ásia, por exemplo, ainda não contam com ordenação da destinação final de dejetos (FETENE et al, 2018).…”

Section: A Importância Da Valorização Dos Resíduos Orgânicos Na Conversão Em Energiaunclassified

Biodigester models used worldwide in the context of intelligent cities

Neres¹,

Ramos²,

Régis³

2021

RNGC

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RESUMOO desenvolvimento das cidades é marcado pelos desafios associados com a demanda de energia em seus diversos níveis, bem como pela necessidade de uma gestão eficiente de resíduos. Nos próximos 30 anos está previsto um aumento da populacional global e um aumento dessa população em áreas urbanas no mundo, acentuando tais gargalos. Nesse contexto, os resíduos orgânicos podem servir de fonte energética limpa e renovável a partir da produção do biogás, o qual é um sobproduto da digestão anaeróbia, e que pode ser convertido em energia elétrica e energia térmica, a partir de sua queima para uso em aquecimento e como combustível. Esse gás é produzido em biodigestores, equipamentos fechados em uma câmara com compartimentos de entrada de substrato e saída do produto final do processo. A partir de uma revisão bibliográfica, o presente estudo buscou os principais modelos de biodigestores utilizados na Europa, Ásia, África e América do Sul, visando apresentar o cenário atual da aplicação desses equipamentos no contexto de cidades inteligentes. Os resultados indicam uma diferença na instalação dos biodigestores entre os continentes. Enquanto a Europa conta com modelos de alta tecnologia, na África, por exemplo, são comuns biodigestores de estrutura e materiais básicos, tornando a produção de biogás ineficiente. Concluiu-se que, assim como observado com outras fontes energéticas e modelos de gestão de resíduos, os países com melhor estrutura e recursos, conseguem desenvolver melhor o uso dos biodigestores, aumentando sua qualidade de vida, enquanto países mais pobres não conseguem explorar totalmente o mesmo potencial de produtividade.

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Section: A Importância Da Valorização Dos Resíduos Orgânicos Na Conversão Em Energiaunclassified

Biodigester models used worldwide in the context of intelligent cities

Neres¹,

Ramos²,

Régis³

2021

RNGC

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“…Currently, plastic from agricultural activities and packaging is treated mostly by mechanical recycling, but the increase in the ecological footprint intrinsic to this treatment requires the use of new and more eco-friendly methods (Ragaert et al, 2017). Urban waste has been used in liquefaction, pyrolysis, incorporation of plastics in road laying (Zhao et al, 2020), production of carbon-infused waste-derived concrete and energy recovery (Fetene et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Use of dirty plastic waste as precursors for activated carbon production—A contribution to the circular economy

Cansado

Mourão

Nabais

et al. 2021

Water & Environment J

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The production of activated carbons (ACs) from dirty plastic wastes derived from the mechanical/biological treatment of urban solid wastes, disposable plastics and plastics used in agriculture is reported. The use of these precursors is innovative and contributes to the circular economy by the valorization of dirty plastics that are usually disposed in landfills. ACs were produced by physical activation, with air or CO 2 , and chemical activation, with KOH or K 2 CO 3 . ACs presented a BET (N 2 ) area and pore volume up to 723 m 2 /g and 0.32 cm 3 /g. Selected samples were tested for the 2,4-dichlorophenoxyacetic acid (MCPA) and 4-chloro-2-methyl-phenoxyacetic acid (2,4-D) removal from the liquid phase. PB-K 2 CO 3 -1:1-700 presented an apparent maximum adsorption capacity of 245 and 289 mg g À1 for MCPA and 2,4-D, respectively.

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“…According to the Brazilian urban sanitation information system (SNIS) latest report, 1,668 Southeastern cities voluntarily declared to have generated 10,488.30 t of waste from pruning and tree branches in 2018 (MDR, 2019). In the tropical urban Brazilian forest context, there is often incorrect disposal of the wood waste, such as dumping in irregular areas and landfills or open-air burning (Araújo et al, 2018;Fetene et al, 2018;Palharini et al, 2018). The higher carbon footprint scenario results of landfill disposal generating almost twice the amount of carbon dioxide than simple Development, v. 9, n. 9, e451997478, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i9.7478 incineration and four times compared to reutilization of the tropical urban forest waste wood in processed bioenergy products (Araújo et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…There are several reasons why the wood of common tropical urban forestry species are not the first option for bioenergy, or not as valued as others in the market, such as the lack of knowledge about their quality, heterogeneity and lack of utilization plans by municipal governments (Faraca et al, 2019;Meira, 2010;Pérez-Arévalo & Velázquez-Martí, 2018). In this context, the characterization of the tropical urban forest wood waste is necessary to attest their quality as an alternative bioenergy source since the biomass properties influences their conversion process (Boumanchar et al, 2019;Duarte da Silva et al, 2013;Fetene et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Energy potential of wood waste from a tropical urban forest

Klingenberg

Nolasco

Júnior

et al. 2020

RSD

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Urban tropical forest species generate large amounts of wood waste by pruning and removing urban trees, which can be an accessible source of biomass that could be used to generate energy instead of being disposed of irregularly. The objective of this study was to evaluate the potential for energy production of the wood residue of seven species most used in urban forestry in the State of São Paulo, Brazil, by determining the physical, chemical and energetic characteristics. Wood waste of 7 common urban forests species in the State of São Paulo were collected in the city of Piracicaba, characterized (humidity, basic density and bulk density), chemically (extract content, volatile materials, fixed carbon and ash content) and energetically (higher, lower, useful calorific power, density energy and thermogravimetric analysis). The highest value of basic density was found in the species Cenostigma pluviosum (653.76 kg/m³), all species had higher calorific values greater than 19 MJ/kg and the energy density of the species varied between 4.45 to 10,80 GJ/m³. The use of these wood residues for direct combustion is a viable alternative and can be considered as a solution to replace the incorrect disposal, which is still a common practice in many cities in developing countries.

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Valorisation of solid waste as key opportunity for green city development in the growing urban areas of the developing world

Cited by 26 publications

References 31 publications

Biodigester models used worldwide in the context of intelligent cities

Biodigester models used worldwide in the context of intelligent cities

Use of dirty plastic waste as precursors for activated carbon production—A contribution to the circular economy

Energy potential of wood waste from a tropical urban forest

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