Towards a more sustainable circular bioeconomy. Innovative approaches to rice residue valorization: The RiceRes case study

Overturf, Emily; Ravasio, Nicoletta; Zaccheria, Federica; Tonin, Claudio; Patrucco, Alessia; Bertini, Fabio; Canetti, Maurizio; Avramidou, K.; Speranza, Giovanna; Bavaro, Teodora; Ubiali, Daniela

doi:10.1016/j.biteb.2020.100427

Cited by 16 publications

(9 citation statements)

References 27 publications

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“…There have been many studies on the use of rice straw for the production of second-generation biofuel, and more recently even to other products like insulation materials, composites, biodegradable plastics and chemicals (Abraham et al 2016 ; Bilo et al 2018 ; Goodman 2020 ; Overturf et al 2020 ). The biodegradable bio-based plastics that are increasingly attracting interest to replace the fossil-based plastics are the microbial polyesters—polyhydroxyalkanoates (PHAs) (Bedade et al 2021 ; Naser et al 2021 ; Yadav et al 2021 ); their high rate of biodegradability even in marine environments lowers the risk of their accumulation as microplastics (Suzuki et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Polyhydroxyalkanoate production from rice straw hydrolysate obtained by alkaline pretreatment and enzymatic hydrolysis using Bacillus strains isolated from decomposing straw

Thược

Chung

Hatti‐Kaul

2021

Bioresour. Bioprocess.

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Rice straw is an important low-cost feedstock for bio-based economy. This report presents a study in which rice straw was used both as a source for isolation of bacteria producing the biodegradable polyester polyhydroxyalkanoate (PHA), as well as the carbon source for the production of the polymer by the isolated bacteria. Of the 100 bacterial isolates, seven were found to be positive for PHA production by Nile blue staining and were identified as Bacillus species by 16S rRNA gene sequence analysis. Three isolates showed 100% sequence identity to B. cereus, one to B. paranthracis, two with 99 and 100% identity to B. anthracis, while one was closely similar to B. thuringiensis. For use in PHA production, rice straw was subjected to mild alkaline pretreatment followed by enzymatic hydrolysis. Comparison of pretreatment by 2% sodium hydroxide, 2% calcium hydroxide and 20% aqueous ammonia, respectively, at different temperatures showed maximum weight loss with NaOH at 80 °C for 5 h, but ammonia for 15 h at 80 °C led to highest lignin removal of 63%. The ammonia-pretreated rice straw also led to highest release of total reducing sugar up to 92% on hydrolysis by a cocktail of cellulases and hemicellulases at 50 °C. Cultivation of the Bacillus isolates on the pretreated rice straw revealed highest PHA content of 59.3 and 46.4%, and PHA concentration of 2.96 and 2.51 g/L by Bacillus cereus VK92 and VK98, respectively.

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Section: Introductionmentioning

confidence: 99%

Polyhydroxyalkanoate production from rice straw hydrolysate obtained by alkaline pretreatment and enzymatic hydrolysis using Bacillus strains isolated from decomposing straw

Thược

Chung

Hatti‐Kaul

2021

Bioresour. Bioprocess.

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“…En route from soil to soil, a bio-product can also be made to serve an additional purpose-biochar from agro-wastes is used as an adsorbent in wastewater treatment before being sent back for soil amendment to fields [21]. On the other hand, Overturf et al (2020) [48], reporting on the progress of the RiceRes EU project, have shown that straw, husk and bran from the fields can also be valorised into building insulations, bio-fillers for polymerbased composites and food industry supplements, respectively. Defatted rice bran, the byproduct which remains after the production of rice bran oil, can be further valorised to bioethanol, biobutanol and lactic acid [22].…”

Section: Discussion-systematic Reviewmentioning

confidence: 99%

Circular Bio-economy—Paradigm for the Future: Systematic Review of Scientific Journal Publications from 2015 to 2021

Govindarajan

2021

Circ.Econ.Sust.

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While ‘renewable’ is the keyword in a bioeconomy and resource conservation is the motivation behind a circular economy, a circular bioeconomy is one in which waste streams from renewable bio-resources are looped back into the technosphere—open-loop or closed-loop recycling or conversion from matter to energy. This systematic review brings together 385 publications from 2015 to 2021, originating from 50 countries and appearing in 150 journals, into a coherent account of the status quo of published research on circular bioeconomy. The numbers bear testimony to the growing interest in this field of research. Germany is the leading contributor to the scientific literature base (10%), while the Journal of Cleaner Production (9%) tops the list of journals in the fray. The methodology adopted has been clearly explained, and the discussion has been segmented into sub-sections and sub-sub-sections to do justice to the diversity of the nature of the publications. A little flexibility in organisation of the flow of the text has been availed of, to improve readability. The circular bioeconomy can be visualised as a set of ‘many through many to many’ relationships, enabling both economies of scale and scope in the longer run. This calls for extensive collaboration and cooperation among the numerous stakeholders involved. Several barriers will have to be overcome. Technology impact assessments and sustainability risk appraisals need to be carried out in order to ensure and convince stakeholders that they are on the right path. But as one knows and will appreciate, challenges lurk where there exist opportunities to be availed of, to replace the take-make-use-dispose paradigm of a linear economy to the grow-make-use-restore alternative. Graphical abstract

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“…A eficiência energética resulta na redução do uso de fontes não sustentáveis, do uso de água e dos impactos ambientais negativos (ANCUŢA; SONIA, 2020; LASO et al, 2018;PAGOTTO;HALOG, 2016;PRINCIPATO et al, 2019). Um exemplo são as biorrefinarias (BOROWSKI, 2021), agentes relevantes na recuperação de energia limpa e renovável (OVERTURF et al, 2020;WEBER;TRIERWEILER;TRIERWEILER, 2020). É possível, mais especificamente, a utilização de sobras de grãos de café para produzir biodiesel, bioetanol, óleo, carvão ou biogás (SISTI et al, 2021).…”

Section: Análise De Conteúdounclassified

Estímulos e barreiras para a economia circular no setor alimentício

ALMEIDA

Aguiar

Jugend

2021

Revista PO: R. Eletr. de Eng. de Produção e Correlatas

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O objetivo deste artigo é identificar artigos acadêmicos que tratam da transição para a economia circular (EC) no setor alimentício e analisar os principais estímulos, barreiras e práticas envolvidas neste processo. Para isso, uma revisão sistemática de literatura foi conduzida, utilizando a base Scopus. A partir da análise bibliométrica, de rede de palavras-chave e de conteúdo, foi possível obter uma visão geral das discussões atuais sobre o tema, que apresenta um crescente interesse, com protagonismo de países europeus e do Brasil. Entre os principais estímulos, foram identificados a eficiência energética, as novas oportunidades de mercado, a colaboração com stakeholders, a ecoeficiência e as possíveis reduções de custos. Dentre as barreiras, foram cinco as principais: tecnológicas, financeiras, operacionais, aceitação dos consumidores e legislação. A redução do consumo de matéria prima e o uso de subprodutos foram as práticas mais abordadas pelos artigos, indicando que o setor alimentício ainda tem potencial para implementar outras estratégias em direção à EC, como resultado da manufatura eficiente e uso mais inteligente dos produtos.

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Towards a more sustainable circular bioeconomy. Innovative approaches to rice residue valorization: The RiceRes case study

Cited by 16 publications

References 27 publications

Polyhydroxyalkanoate production from rice straw hydrolysate obtained by alkaline pretreatment and enzymatic hydrolysis using Bacillus strains isolated from decomposing straw

Polyhydroxyalkanoate production from rice straw hydrolysate obtained by alkaline pretreatment and enzymatic hydrolysis using Bacillus strains isolated from decomposing straw

Circular Bio-economy—Paradigm for the Future: Systematic Review of Scientific Journal Publications from 2015 to 2021

Estímulos e barreiras para a economia circular no setor alimentício

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