Coupled effect of torrefaction and blending on chemical and energy properties for combustion of major open burned agriculture residues in Thailand

A economia global é diretamente dependente dos combustíveis fósseis, consumindo um total de aproximadamente 70% destas fontes de energia. Contudo, as energias renováveis, principalmente os biocombustíveis produzidos pela biomassa estão ganhando espaço, com destaque para o capim-elefante, que vem se destacando na produção de bioetanol no Brasil. No entanto, antes de ocorrer a fermentação para a produção do bioetanol, a biomassa deverá passar por um processo chamado de pré-tratamento. Por isso, quando se analisa os processos químicos, a otimização nas variáveis para o pré-tratamento é fundamental, assim surge a necessidade de aplicar um sistema de modelagem matemática como a lógica nebulosa ou fuzzy. Diante desse contexto, o objetivo desse artigo é identificar como está configurado o estado do conhecimento sobre a aplicação da lógica fuzzy no pré-tratamento alcalino no capim-elefante. Com a realização da pesquisa utilizando a Revisão Bibliográfica Sistêmica (RBS), foi possível identificar diversas oportunidades da aplicação da lógica fuzzy nos pré-tratamentos alcalinos no capim-elefante. Dos 86 documentos analisados nesta pesquisa, 100% foram de artigos de pesquisa e de revisão bibliográfica, o que demonstra uma relevância na academia ao uso do capim-elefante na produção bioetanol e, da mesma forma, que as pesquisas sobre a aplicação de pré-tratamento nas biomassas vem ganhando importância nos últimos anos, sendo cada vez mais estudada e desenvolvida por pesquisadores da área. Apesar de não apresentar nenhum artigo com referência específica da utilização da lógica fuzzy no pré-tratamento alcalino do capim-elefante, isso abre um grande leque para novas pesquisas utilizando a lógica nebulosa.

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“…Artigo de revisão sobre a utilização da pirolise química nas biomassas lignocelulósicas (Kajina et al, 2018)…”

Section: Production Of Sugars From Grass Silage After Steam Explosion or Soaking In Aqueous Ammoniaunclassified

Lógica fuzzy aplicada ao pré-tratamento do capim-elefante: uma revisão bibliográfica sistemática

Godinho

Caneppele

2021

RSD

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“…This trend also reported for the torrefied agriculture residues; napier grass, rice straw, cassava stalks, and corn cob. The ash content of all these biomasses increase after imposed with torrefaction treatment in the range of 20 -30 % as compared to the untreated biomass [19]. Ash content of biomass is the inorganic compound left in the combustion crucible that do not involve in the combustion process.…”

Section: Proximate Analysis Of Torrefied Khaya Senegalensis Biomassmentioning

confidence: 99%

Torrefaction Temperature and Holding Time Effect on Khaya Senegalensis Biomass

Rahman

Ismail

Shaari

2021

ARFMTS

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Khaya senegalensis is fast growing plant, can be planted in marginal land and grow easily in Malaysia. Therefore, it has the potential to be developed as dedicated energy crops. This study was conducted to determine the effect of torrefaction in upgrading the quality of Khaya senegalensis biomass. Torrefaction has been known as one of the most promising pre-treatments for biomass. In this experiment, the biomass sample was torrefied in the muffle furnace at four different temperatures (225, 250, 275 and 300°C) and three durations (30, 60 and 90 minutes). The results show that both torrefaction temperature and duration posed strong impact on the biomass quality. It was found that the volatile matters of the biomass reduce significantly as the torrefaction severity increase. On the other hand, the ash and carbon content increase with the increasing temperature and duration. Most importantly the calorific value of the biomass sample amplifies to 22.26Mj/kg from 16.11Mj/kg of untreated sample when torrefied at 300°C for 90 minutes.

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Phosphorus and bioenergy recovery from anaerobic co-digestion of food waste and corn residues with digested sludge: effect of HRT and pre-treatment methods

Khaita,

Chinwetkitvanich,

Polprasert

et al. 2024

Clean Techn Environ Policy

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Organic wastes from the human ecosystem including food waste (FW), agricultural waste and digested sludge (DS) from wastewater treatment can be utilized as valuable materials in anaerobic co-digestion (AcoD) for the dual purpose of bioenergy production and phosphorus (P) recovery through a chemical precipitation process. In this study, AcoD using FW and corn residues (CS) with DS for simultaneous sustainable phosphate release and biogas production were investigated. Different hydraulic retention times (HRT) of 10, 20, and 30 days were investigated, and FW was grinded, while CS pre-treatment methods including physical (FWCS), chemical (FWCS-Chem), and thermal (FWCS-Temp) were considered. The substrates of FW and CS compositions were conducted with a total organic loading of 6 g volatile solids (VS)/L/d (5 FW/1 CS) with a carbon-to-nitrogen ratio (C/N) of 24. The results indicate that FWCS-Chem showed the highest cumulative biogas production simultaneously with P release at HRT 20 days with 7279 L/m3 and 29.67%, respectively. Moreover, the effluent from all digesters exhibited a Mg/P ratio above 1, suitable for struvite precipitation without an external Mg source. Accordingly, FW, FWCS, and FWCS-Chem achieved P recovery rates of 63.64%, 69.75%, and 70.19% at 20-day HRT, with corresponding P contents in solids of 9.45, 9.43, and 8.29%, respectively. These values are comparable to commercial phosphate fertilizer containing 8.80% P. Moreover, incinerating the precipitating solids offers high-quality P concentrations in solids of up to 15.52, 16.32, and 16.31%, respectively. Hence, 20-day HRT was found to be the optimal condition for FW, CS, and DS for anaerobic co-digestion, resulting in the highest biogas production, P release, and maximum financial return for P recovery. Graphical abstract Phosphorus and bioenergy recovery from anaerobic co-digestion of food waste and corn residues with digested sludge.

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Coupled effect of torrefaction and blending on chemical and energy properties for combustion of major open burned agriculture residues in Thailand

Cited by 14 publications

References 33 publications

Lógica fuzzy aplicada ao pré-tratamento do capim-elefante: uma revisão bibliográfica sistemática

Lógica fuzzy aplicada ao pré-tratamento do capim-elefante: uma revisão bibliográfica sistemática

Torrefaction Temperature and Holding Time Effect on Khaya Senegalensis Biomass

Phosphorus and bioenergy recovery from anaerobic co-digestion of food waste and corn residues with digested sludge: effect of HRT and pre-treatment methods

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