Coffee residue as a valorization bio-agent for shelf-life extension of lactic acid bacteria under cryopreservation

Choi, In Seong; Ko, Seung Hee; Kim, Ho Myeong; Yang, Jung Eun; Jeong, Seul-Gi; Chang, Ji Yoon; Qi, Shi-Bo; Qi, Xin; Cui, Chengbi; Moon, Jae‐Hak; Park, Hae Woong

doi:10.1016/j.wasman.2020.09.025

Cited by 7 publications

(6 citation statements)

References 37 publications

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“…In particular, alkali-treated biochars compared with oxidative and acid-treated biochars have presented improved specific surface areas and total pore volumes, which are sufficient to remove pollutants in the aqueous solutions [20]. Over 600 million tons of ground coffee residues are disposed into the environment annually worldwide after the extraction process for coffee powder and instant coffee [21]. Ground coffee residues are known to contain a high concentration of carbohydrates (e.g., mannose, glucose, and galactose) and OH and C=O functional groups [22].…”

Section: Introductionmentioning

confidence: 99%

Effects of NaOH Activation on Adsorptive Removal of Herbicides by Biochars Prepared from Ground Coffee Residues

et al. 2021

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In this study, the adsorption of herbicides using ground coffee residue biochars without (GCRB) and with NaOH activation (GCRB-N) was compared to provide deeper insights into their adsorption behaviors and mechanisms. The physicochemical characteristics of GCRB and GCRB-N were analyzed using Brunauer–Emmett–Teller surface area, Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction and the effects of pH, temperature, ionic strength, and humic acids on the adsorption of herbicides were identified. Moreover, the adsorption kinetics and isotherms were studied. The specific surface area and total pore volume of GCRB-N (405.33 m2/g and 0.293 cm3/g) were greater than those of GCRB (3.83 m2/g and 0.014 cm3/g). The GCBR-N could more effectively remove the herbicides (Qe,exp of Alachlor = 122.71 μmol/g, Qe,exp of Diuron = 166.42 μmol/g, and Qe,exp of Simazine = 99.16 μmol/g) than GCRB (Qe,exp of Alachlor = 11.74 μmol/g, Qe,exp of Diuron = 9.95 μmol/g, and Qe,exp of Simazine = 6.53 μmol/g). These results suggested that chemical activation with NaOH might be a promising option to make the GCRB more practical and effective for removing herbicides in the aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Effects of NaOH Activation on Adsorptive Removal of Herbicides by Biochars Prepared from Ground Coffee Residues

et al. 2021

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“…Previously, coffee residue extract and citrus byproduct as cryoprotective agents increased LAB viability, and supercooling pretreatment also increased the cell viability by over 10% [10] , [12] , [16] . In this study, immediately after freeze-drying of the Leu.…”

Section: Resultsmentioning

confidence: 98%

“…Cryoprotective agents have been investigated for prolonging the shelf life of bacteria. Carbohydrates such as disaccharides (sucrose, lactose, trehalose), polymers (starch, maltodextrin,), and sugar alcohol (sorbitol) are primarily considered as protective agents for LAB preservation [3] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] . Low-molecular-weight agents such as disaccharides, and sugar alcohol, prevent protein denaturation during FD process, forming hydrogen bonds with polar head groups of cellular membrane.…”

Section: Introductionmentioning

confidence: 99%

Sonochemical application reduces monosaccharide levels and improves cryoprotective effect of Jerusalem artichoke extract on Leuconostoc mesenteroides WiKim33 during freeze-drying

Kim

Kim²,

Jeong³

et al. 2023

Ultrasonics Sonochemistry

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“…In a previous study, we found that the use of coffee residue extracts and SP powder as cryoprotective agents, with supercooling pretreatment, resulted cell viabilities of 48.8 and 81.2% for Leuconostoc mesenteroides WiKim32 and L. brevis WiKim0069, respectively, after 56 days of storage. 38,47 Also, the viability of micro-capsulated L. brevis WK12 and Lactobacillus lactis WK11 with SP was 62.8 and 44.5%, respectively, after 56 days of storage. 45 In addition, the viability of capsulated Lactobacillus delbrueckii subsp.…”

Section: Resultsmentioning

confidence: 98%

“…Insoluble sugar contents (rhamnose, arabinose, xylose, mannose, galactose, and glucose) in CP were analyzed using gas chromatography. Pretreatment and analysis were conducted using the method described by Choi et al 47 Also, the method validation was performed in accordance with AOAC's guidance. 49 4.2.…”

Section: Methodsmentioning

confidence: 99%

Efficient Citrus (Citrus unshiu) Byproduct Extract-Based Approach for Lactobacillus sakei WiKim31 Shelf-Life Extension

Kim¹,

Jeong²,

Hwang³

et al. 2021

ACS Omega

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Lactic acid bacteria produce various bioactive compounds widely used in human healthcare. However, studies on cryoprotective agents for the efficient storage of lactic acid bacteria after freeze-drying are still lacking. Here, we report the shelf-life extension effects of a highly efficient and eco-friendly cryoprotective agent and a cold adaptation method on Lactobacillus sakei WiKim31. Cold adaptation of L. sakei WiKim31 increased exopolysaccharide expression in response to abiotic stress. As a possible cryoprotective agent, the citrus byproduct (CP) contains a variety of sugars, amino acids, and cations, exhibiting high antioxidant activity. L. sakei WiKim31 powders formulated with CP or a mixture of soy powder (SP) and CP exhibited high cell viability at 58.3 and 76.3%, respectively, after 56 days of storage. These results indicate that CP can be efficiently used as a novel cryoprotective agent either alone or in combination with SP to improve the storage conditions of L. sakei WiKim31 and preserve it longer.

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Coffee residue as a valorization bio-agent for shelf-life extension of lactic acid bacteria under cryopreservation

Cited by 7 publications

References 37 publications

Effects of NaOH Activation on Adsorptive Removal of Herbicides by Biochars Prepared from Ground Coffee Residues

Effects of NaOH Activation on Adsorptive Removal of Herbicides by Biochars Prepared from Ground Coffee Residues

Sonochemical application reduces monosaccharide levels and improves cryoprotective effect of Jerusalem artichoke extract on Leuconostoc mesenteroides WiKim33 during freeze-drying

Efficient Citrus (Citrus unshiu) Byproduct Extract-Based Approach for Lactobacillus sakei WiKim31 Shelf-Life Extension

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