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Možnosti využití výlisků z hroznů révy vinné
Kapičáková, Tereza
Grapevine is known for the production of wine or other products made from grapes. Recently, however, are starting to get to market products which are formed from the waste components in winemaking. These are the products of stem, marc and seeds of grapes. Known as oil, vinegar and flour from the seeds of grapes. It is also used in cosmetics. Expanded production is a sophomore and grappa from the marc. Marc and of stem is also used for fertilizer or feed.
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Representation of biologically active substances in the grape seeds (Vitis vinifera L.)
Horníčková, Štěpánka ; Hejtmánková, Alena (advisor) ; Vlastimil, Vlastimil (referee)
Seeds of 41 white and 22 blue vine varieties cultivated on six vine-growing areas were assessed as a by-product after winemaking on the contents of total polyphenols (TP) and phosphorus (P) spectrophotometrically, total tocols (TC) including individual tocols by HPLC-FLD, and metals (Ca, Mg, Na, K, Fe, Zn, Cu, and Mn) by FAAS. Remaining TP and TC levels were mainly affected by the variety, while levels of microelements (Cu, Mn, and Zn) and P or K by the vine-growing area. The highest TC and TP levels were found in the seeds of white varieties. Varieties of grape seeds have significant impact on the gamma-tocotrienol content. The color of grape varieties has significant impact on alpha-tocotrienol content. Grape seeds from grape cultivated on the Czech growing area contained higher levels of macroelements except P, however no significant differences between growing areas have been found. The crop year has significant influence on TP, Fe and Cu content. Results herein revealed the considerable potential of grape seeds, a by-product of the vinification process, as a valuable inexpensive source of high added value of nutritionally beneficial compounds - polyphenol and tocol antioxidants and macro- and microelements for use as feed additives in animal nutrition.
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Možnosti využití vybraných materiálů pro výrobu bioplynu
Vogeltanz, Jakub
This work deals with the anaerobic treatment of grape marcs. In this work we tested two varieties of wine. Veltlínské zelené and Zweigletrebe. Tests were carried out in the Republic reference laboratory at Mendel University in Brno under mesophilic anaerobic conditions for 24 days in 0.003 m3 reactors and for 26 day in 0.120 m3 reactors. Biogas production and methane content were monitored daily during the test. The measurement results of testing variety Veltlínské zelené were: Substance loads ratio 0.496 kg.kg-1 - specific production of biogas 0.415 m3.kg-1, specific production of methane 0.246 m3.kg-1 and average concentration of methane in biogas was 59.3%. Substance loads ratio 0.099 kg.kg-1 - specific production of biogas 0.656 m3.kg-1, specific production of methane 0.262 m3.kg-1 and average concentration of methane in biogas was 39.8 %. The measurement results of testing variety Zweigeltrebe were: Substance loads ratio 0.496 kg.kg-1 - specific production of biogas 0.378 m3.kg-1, specific production of methane 0.234 m3.kg-1 and average concentration of methane in biogas was 61.9 %. Substance loads ratio 0.095 kg.kg-1 - specific production of biogas 0.544 m3.kg-1, specific production of methane 0.262 m3.kg-1 and average concentration of methane in biogas was 48.9 %.
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Study of utilization of waste material from the food industry for the removal of metals from waste waters
Křikala, Jakub ; Obruča, Stanislav (referee) ; Diviš, Pavel (advisor)
In this bachelor thesis is discussed the potential use of the marc from the wine production for the removal of metals from wastewaters. Marc containing stems, peels and seeds without any prior chemical treatment were homogenized and rinsed with distilled water to remove soluble impurities. IR spectrometry was used for characterization of the major functional groups responsible for the adsorption of metal ions. The experimental part of this work consisted of the assessment of the optional pH value for adsorption of copper and the maximum adsorption capacity of the used material in column and batch method. The results show that the optional pH values for adsorption of copper were in the range pH 3 – 4. Maximum adsorption capacity were calculated form adsorption isotherms by applying the Langmuir model and found to be 0,260 4 mg/g Cu at a column method and 1,246 2 mg/g Cu after 30 minutes the batch adsorption method. Further, it was experimentally demonstrated that the adsorption of copper in addition to the pH depends also on the initial copper concentration in the solution, contact time and other parameters whose optimization would achieve greater adsorption capacity of the referred material. The results indicate that the marc from the wine production have good potential form removing metals from wastewaters by adsorption.
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Hodnocení parametrů kompostovacího procesu při kompostování matolin
Dvořáčková, Alena
Diploma Thesis deales with appropriateness of utilization of grape marc as material for composting. There were created three experimental composting starters with different material composition with different content of grape marc and process of the main composting factors was studied. The results show that use of grape marc as material for composting bases is suitable. Study of the size of composting area for processing the waste by composting was compiled on the basis of available quantity of biodegradace waste in cadastral of Mikulcice. Economic evaluation was compiled on the basis of determination of cost items from which the most important were depreciation costs of reinforced area and machines, costs of buying materials, costs of operation of machines and service costs.
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