Biochar from Acai agroindustry waste: Study of pyrolysis conditions

Sato, Michel Keisuke; Lima, Herdjânia Veras de; Costa, Aline Noronha; Rodrigues, Suelí; Pedroso, Augusto José Silva; Maia, C. M. B. de F.

doi:10.1016/j.wasman.2019.07.022

Cited by 61 publications

(15 citation statements)

References 15 publications

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“…Represented by a tradition of the Amazon region, the consumption of acai pulp is no longer simply for locals in the northern Brazilian states, since the knowledge regarding its anti-aging properties and the presence of bioactive compounds have spread to many countries of Europe, United States, Japan and China (Wycoff et al 2015;Yamaguchi et al 2015). Nevertheless, the considerable increase in the global demand for acai berry is accompanied by the large generation of waste, which is composed by a fibrous surface endocarp with cellulose (37%), lignin (48%) and extractives (15%), constituting up to 80% of the fruit (Sato et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Biochar produced from Amazonian agro-industrial wastes: properties and adsorbent potential of Cd2+ and Cu2+

Dias

Souza

Costa

et al. 2019

Biochar

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In the Amazon region, several residues that have been misused can serve as feedstocks for biochar production with the aim of recovering soils contaminated by heavy metals. However, these biochars need to be firstly tested for their adsorption capacity as well as their physicochemical attributes prior to field application. Therefore, this study aimed to characterize and evaluate the adsorption capacities of Cd 2+ and Cu 2+ of biochars produced from acai (BA), Brazil nut (BN), and palm kernel cake (BK) residues. Biochars were produced by slow pyrolysis at four different temperatures (400, 500, 600, and 700 °C). The physicochemical properties of the biochars, such as cation exchange capacity, ash, recalcitrance index, and aromaticity were enhanced with increased pyrolysis temperature. The adsorption capacities of Cd 2+ and Cu 2+ showed high correlations with the physicochemical properties of biochar, indicating the importance of these characteristics in the adsorption process. Furthermore, the adsorption of Cd 2+ and Cu 2+ also increased with the increase in the pyrolysis temperature. In a competitive system, Cd 2+ exhibited higher adsorption capacity than Cu 2+ for all biochars. In general, BN showed the highest adsorption capacity, followed by BK and BA. Biochars produced from the Amazonian residues have the potential to improve soil quality when used as amendments in the recovery of soils contaminated with Cd and Cu, representing an environmentally sound technology for the reuse of these residues.

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Section: Introductionmentioning

confidence: 99%

Biochar produced from Amazonian agro-industrial wastes: properties and adsorbent potential of Cd2+ and Cu2+

Dias

Souza

Costa

et al. 2019

Biochar

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“…2018encontraram o valor médio de 1,09 %, valores aproximados deste estudo. Esse resíduo já foi utilizado em estudos de produção de energia e o baixo teor de cinzas é importante para um rendimento satisfatório de energia (BUFALINO et al, 2018;PROTÁSIO et al, 2013;SATO et al, 2019).…”

Section: Resultsunclassified

Análise físico-química de diferentes resíduos agroindustriais para possível utilização na indústria

Martins

Souza

2020

BJD

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“…In association with the environmental research area, waste management and energy / biochemicals recovery technologies studies increased in recent years. The main works addressing açaí seed as raw material to develop energy recovery routes, follows: (i) extraction and evaluation of bioactive compounds; 3,31,32 (ii) hydrolysis to obtain sugars by hydrothermal and enzymatic treatment; 33–35 (iii) evaluation of physical properties to improve energetic attributes for combustion and fuel applications; 5,36,37 (iv) açaí seed gasification; 6 (v) activated carbon production; 28 (vi) pyrolysis; 7 and (vii) supercritical water hydrolysis followed by anaerobic digestion to improve biogas and methane production 20 …”

Section: Bibliometric Evaluationmentioning

confidence: 99%

“…However, the açaí industry faces the challenge of low fruit yield, where the fresh pulp, acclaimed as a nutraceutical or functional food, corresponds to only 10–15% by weight of the fruit 3–5 . Primarily, the solid by‐product, açaí seed, is destined for combustion, and, sometimes, it is not discarded in an environmentally suitable manner 6,7 . The biggest açaí producers are located in the North region of Brazil, in the ‘Legal Amazon’, which is, currently, threatened by the expansion of the agricultural frontier for cattle and soybean crops, the construction of highways, and new hydroelectric power plants 8,9 …”

Section: Introductionmentioning

confidence: 99%

Sustainable development in the Legal Amazon: energy recovery from açaí seeds

Maciel-Silva

Buller

Gonçalves

et al. 2021

Biofuels Bioprod Bioref

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The Brazilian açaí industry reached national and international prominence in the last few years. Its final product, mainly frozen pulp, became popular worldwide, accounting for a high market share, including exports. Nevertheless, the solid by‐products arising from the processing are not always discarded in an environmentally suitable manner. This review presents a scientometric analysis of açaí research in the last 27 years (1993 to 2019), applying a longitudinal bibliometric study. Through data analysis, it can be observed that Brazil and the USA are the countries that mostly contributed to the development of açaí research. Although Brazil has more publications, the USA presents more articles in partnership with 21 countries. The results also showed that few documents addressed renewable energy recovery with the following technologies: combustion, pyrolysis, supercritical water hydrolysis, and anaerobic digestion. Further analysis of the anaerobic digestion of the totality of açaí seeds generated in Brazil indicated that, theoretically, the electric energy from biogas burning could supply the whole frozen pulp industry requirement with an additional surplus for sales to the grid. Hence, electricity replacement contributes to greenhouse gas mitigation. The assessment of the potential electric energy generation illustrates how technological integration can be an innovative way to rethink the açaí production chain using a circular economy concept. Moreover, the technological advances could stimulate sustainable agro‐industrial intensification in areas such as the Legal Amazon, considered a hotspot for climate change mitigation. © 2021 Society of Industrial Chemistry and John Wiley & Sons Ltd.

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Biochar from Acai agroindustry waste: Study of pyrolysis conditions

Cited by 61 publications

References 15 publications

Biochar produced from Amazonian agro-industrial wastes: properties and adsorbent potential of Cd2+ and Cu2+

Biochar produced from Amazonian agro-industrial wastes: properties and adsorbent potential of Cd2+ and Cu2+

Análise físico-química de diferentes resíduos agroindustriais para possível utilização na indústria

Sustainable development in the Legal Amazon: energy recovery from açaí seeds

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