Orange peels: from by‐product to resource through lactic acid fermentation

Ricci, Annalisa; Díaz, Ana Belén; Caro, Ildefonso; Bernini, Valentina; Galaverna, Gianni; Lazzi, Camilla; Blandino, Ana

doi:10.1002/jsfa.9958

Cited by 42 publications

(34 citation statements)

References 36 publications

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“…Lactic acid bacteria (LAB), a heterogeneous group with recognition as Qualified Presumption of Safety (QPS)-status by EFSA, are the most important microorganisms associated with fermentation and thus exploited for industrial bioprocesses. Recently, the exploitation of LAB strains to valorise by-products and waste into high value added products has been described but their potential on bio-transformations is still an untapped biotechnology resource [19][20][21]. Different metabolites of industrial interest, such as bioactive molecules, can be produced by lactic acid fermentation starting from low-cost substrates.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Biomasses from Lactic Acid Fermentation of Black Soldier Fly Prepupae and Related By-Products

et al. 2020

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Worldwide, thousands of insect species are consumed as food or are used as feed ingredients. Hermetia illucens, ‘black soldier fly’, is one of them, and a large amount of puparia and dead adults flies are accumulated during rearing. These materials represent important wastes but no studies are still present in the literature regarding their functional properties and potential reuse. Lactic acid bacteria (LAB) are a heterogeneous group of bacteria contributing to various industrial applications, ranging from food fermentation, chemicals production to pharmaceuticals manufacturing. A LAB feature of industrial interest is their ability to produce antimicrobial metabolites. Considering the scientific and commercial interest in discovering novel antimicrobials, this work will be direct towards fermentation of insect-derived biomasses: puparia and adults insect at the end of life cycle. To the best of our knowledge, the in vitro antimicrobial activity of fermented insects is tested for the first time. This study aimed also to evaluate differences in the composition between fermented and unfermented insects, and to study whether the fermentation and the type of LAB used played a crucial role in modifying the composition of the substrate. Results firstly highlighted fermentability of this species of insects, showed that fermented black soldier flies puparium possess a high antimicrobial activity against tested pathogens. Moreover, result of chemical composition showed that fermented biomass had a higher percentage of fat and a more complex fatty acids profile.

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Section: Introductionmentioning

confidence: 99%

Antimicrobial Biomasses from Lactic Acid Fermentation of Black Soldier Fly Prepupae and Related By-Products

et al. 2020

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“…According to Rezzadori et al ., 6 residues from orange juice production generally have no economic value, and the most common utilization of orange bagasse is for animal feed, accounting for up to 70–80% of production; however, the bitter taste reduces its palatability 1 . Other uses have also been reported in the literature, including the extraction of bioactive compounds such as carotenoids, polyphenols and flavonoids, 7,8 energy production, 9,10 ethanol 11 and fermentation substrate for lactic acid production 12 …”

Section: Introductionmentioning

confidence: 99%

Valorization of orange bagasse through one‐step physical and chemical combined processes to obtain a cellulose‐rich material

et al. 2020

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BACKGROUND Orange bagasse (OB) is an agroindustrial residue of great economic importance that has been little explored for the extraction of cellulose. The present study aimed to investigate different combinations of chemical (sodium hydroxide, peracetic acid and alkaline peroxide) and physical (autoclaving and ultrasonication) treatments performed in one‐step processes for cellulose extraction from OB and to characterize the materials obtained according to their composition, morphology, crystallinity and thermal stability. RESULTS The processing yields ranged from 140 to 820 g kg−1, with a recovery of 720–1000 g kg−1 of the original cellulose. Treatments promoted morphological changes in the fiber structure, resulting in materials with higher porosity, indicating partial removal of the noncellulosic fractions. The use of combined chemical treatments (NaOH and peracetic acid) with autoclaving was more efficient for obtaining samples with the highest cellulose contents. CONCLUSION Therefore, ACSH (processed by autoclaving with NaOH) was the most effective one‐step treatment, resulting in 71.1% cellulose, 0% hemicellulose and 19.0% lignin, with a crystallinity index of 42%. The one‐step treatments were able to obtain materials with higher cellulose contents and yields, reducing reaction times and the quantity of chemical reagents employed in the overall processes compared to multistep conventional processes. © 2020 Society of Chemical Industry

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“…For this reason, the use of renewable feedstock as lignocellulosic biomass is a promising alternative for green chemical production. So, several lignocellulosic materials have been used as raw materials, such as, orange peels, sugarcane molasses, apple pomace, rice bran, wheat straw, etc . Generally, hydrolysates from lignocellulose used for lactic acid fermentation are supplemented with all other components of the MRS media except for the primary carbon source.…”

Section: Resultsmentioning

confidence: 99%

Feasibility of exhausted sugar beet pulp as raw material for lactic acid production

et al. 2020

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BACKGROUND Exhausted sugar beet pulp pellets (ESBPP), a sugar industry by‐product generated after sugar extraction in the sugar production process, have been used as a raw material for lactic acid (LA) production via hydrolysis and fermentation by Lactobacillus casei. To design a more cost‐effective process, simultaneous saccharification and fermentation (SSF) of ESBPP is proposed in the present study. The effects of pH control, nutrient supplementation and solid addition in fed‐batch SSF on lactic acid production were investigated. RESULTS The highest LA concentration (26.88 g L–1) was reached in fed‐batch SSF at a solid/liquid loading of 0.2 g mL–1, with pH control (by adding 30 g L–1 CaCO3 to the medium) and nutrient supplementation (by adding 20 mL of MRS medium per 100 mL of buffer). Under these conditions, a maximum productivity of 0.63 g L−1 h−1 was achieved, which is 2.7 times higher than that attained in the control experiment (SSF inoculated at time 0 h). However, a slightly lower LA yield was obtained, revealing the need of an increasing dose of enzymes at high solid loading SSF. CONCLUSION An efficient fed‐batch SSF strategy with pH control and MRS supplementation is described in the present study, attaining higher LA productivity compared to separate hydrolysis and fermentation and SSF. © 2020 Society of Chemical Industry

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Orange peels: from by‐product to resource through lactic acid fermentation

Cited by 42 publications

References 36 publications

Antimicrobial Biomasses from Lactic Acid Fermentation of Black Soldier Fly Prepupae and Related By-Products

Antimicrobial Biomasses from Lactic Acid Fermentation of Black Soldier Fly Prepupae and Related By-Products

Valorization of orange bagasse through one‐step physical and chemical combined processes to obtain a cellulose‐rich material

Feasibility of exhausted sugar beet pulp as raw material for lactic acid production

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