Simplified process of extraction of polyphenols from agroindustrial grape waste

Grape marc, also known as grape pomace, is one of the most investigated bio-wastes derived mainly from grape skin and seeds, which is produced as a by-product of winemaking on the million-ton scale annually. Presently, the most important high-value use of grape pomace is in the production of oenological tannins, widely-used additives in the food and beverage industry. This article studies the possible use of grape waste in the plastic industry, as request of the consumer for green plastics with regards to environmental impact, and in the case of packaging, to improve the shelf-life and safety of the products contained. 4 white grape varieties and 4 red grape varieties (most cultivated grape varieties in Romania) were taken into study, processed using different technological methods and the spent material (grape skins and seeds) were analysed regarding their total phenolic compounds and total tannins.

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Production of ligninolytic enzymes by Pleurotus eryngii through solid state fermentation using grape waste

New Biotechnology ◽

10.1016/j.nbt.2012.08.292 ◽

2012 ◽

Vol 29 ◽

pp. S104

Author(s):

Merve Akpinar ◽

Raziye Ozturk Urek

Keyword(s):

Solid State ◽

Solid State Fermentation ◽

Ligninolytic Enzymes ◽

Pleurotus Eryngii ◽

Grape Waste

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Production of Cellulolytic Enzymes by Aspergillus phoenicis in Grape Waste using Response Surface Methodology

Applied Biochemistry and Biotechnology ◽

10.1007/s12010-008-8190-7 ◽

2008 ◽

Vol 152 (2) ◽

pp. 295-305 ◽

Cited By ~ 11

Author(s):

Lucas André Dedavid e Silva ◽

Fernanda Cortez Lopes ◽

Silvana Terra Silveira ◽

Adriano Brandelli

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Cellulolytic Enzymes ◽

Aspergillus Phoenicis ◽

Grape Waste

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Statistical Modeling and Kinetic Studies on the Adsorption of Reactive Red 2 by a Low-Cost Adsorbent: Grape Waste-Based Activated Carbon Using Sulfuric Acid Activator-Assisted Thermal Activation

Adsorption Science & Technology ◽

10.1155/2021/8404197 ◽

2021 ◽

Vol 2021 ◽

pp. 1-13

Author(s):

Seyyed Alireza Mousavi ◽

Davood Shahbazi ◽

Arezoo Mahmoudi ◽

Parviz Mohammadi ◽

Tooraj Massahi

Keyword(s):

Activated Carbon ◽

Statistical Modeling ◽

Low Cost ◽

Dye Adsorption ◽

Kinetic Studies ◽

Type I ◽

Order Kinetic ◽

Grape Waste ◽

Pseudosecond Order ◽

Reactive Red 2

The efficiency of activated carbon produced from grape waste as a low-cost, nontoxic, and available adsorbent to remove Reactive Red 2 from aqueous solution has been investigated. The prepared activated carbon has been characterized by FTIR, SEM, and BET. The results of characterization indicate the successful conversion of grape waste into mesoporous AC with desirable surface area consist of different functional groups. The results of statistical modeling displayed high R 2 value of 0.97% for dye removal that shows the developed model has acceptable accuracy. The effect of independent variables indicated that the highest adsorption (96.83%) obtained at pH 3, adsorbent dosage of 12.25 g/L, and initial dye concentration of 100 mg/L when the adsorption time was 90 min. The results of isotherms modeling showed that the data fit well with the Langmuir (type II). The kinetic studies using pseudofirst-order and pseudosecond-order models pointed out that the type (I) of pseudosecond-order kinetic model provided the best fit to the adsorption data. Parameters of thermodynamics including Gibbs energy ( Δ G ° ) and k o were calculated. The values of Δ G ° indicated that the dye adsorption of RR2 is spontaneous. The agricultural wastes due to special points such as low-cost, availability, and high ability to produce an adsorbent with high efficiency to remove dye can be proposed for water and wastewater treatment.

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