The wine industry is one of the most important agro-processing industries in the world. The processing waste generated during the winemaking process, including skins, pulp and stems, is already a burden on the environment if directly discarded, but in fact, these waste materials have a high nutritional potential and can be made into more economically valuable health products.
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New research says: the original fruit pomace can also have health functions
Grapes are one of the most widely distributed fruits in the world"s agro-industry, with a global production of about 7,500 tons per year. The general use of processing is as edible fruit, juice, raisins, etc., but the main use belongs to the winemaking industry, which is related to the history and culture of European countries, and the winemaking culture is a very important cultural asset for Europe.
However, every year in Europe, the winemaking industry can produce up to 23 million tons of wine processing waste, including skins, pulp, seeds and stems, etc., except for the stems of grapes can be used to extract grape seed oil, the other waste is almost directly discarded.
However, new research published in the December 2020 issue of Trends in Food Science Technology, a journal published by the European Federation of Food Science and Technology and the International Union of Food Science and Technology, points out that the winemaking industry causes serious environmental persecution on the planet every year and that these processing wastes could be turned into more economically valuable health products. The new study, published in the December 2020 issue of Trends in Food Science Technology, points out that the winemaking industry is causing serious environmental damage to the planet every year, and that these processing wastes could be turned into more economically valuable health products while addressing environmental concerns.
Is the processing waste from the winemaking industry more valuable than alcohol?
An important recyclable substance in these waste products is polysaccharide. What is so special about this type of polysaccharide? They are rich in prebiotics, which help the growth of intestinal probiotics, and they have anti-inflammatory, anti-cancer and antioxidant activities, which are widely used in vaccine production.
In addition, grape waste includes other nutrients such as "antioxidant compounds", including polyphenols (6-15%) and proteins (5-12%), which have been shown in studies to delay or prevent the production of free radicals, reduce the likelihood of cancer, or be used to prevent cardiovascular disease. The fruit pomace is also rich in dietary fiber (60%).
Thus, the nutrients contained in wine processing waste are of great economic value, but the content and characteristics depend on the grape variety, the state of the grape harvest and the processing conditions. Studies at this stage show that the nutritional value of pomace is higher in red grapes than in white grapes, while the nutritional value of stems is better in white grapes than in red grapes.
Global food processing waste, weighing down the planet
Approximately 1.3 billion tons of food are wasted worldwide each year, which is equivalent to 3,300 metric tons of CO2 emissions per year. In the stages before the food goes to retail, it may go through harvest, capture, and slaughter, and these processes generate even more waste that accounts for 14% of the total food loss.
However, according to the United Nations 2017 population statistics, the world's population will reach 9.8 billion in 2050. Such a population growth trend will not only reduce the world's food security reserves, but may also cause a new food crisis, so how to reduce waste at all stages of food production is a subject that cannot be delayed.
There are still many difficulties to overcome to make good use of the large amount of processing waste loss
Due to environmental changes and food waste, the direction of sustainable development of the industry is to make better use of resources.
However, even though the amount of food processing waste is very large and we all want to reuse it, there may be safety concerns about the growth of pathogenic bacteria if it is not easily preserved. Therefore, collecting these wastes from the raw material side is the key point to reduce the possibility of contamination during transportation.