Cheese is the earliest artificial food in the world, and its raw material is mainly fresh milk. A long time ago, after people made cheese, they drained the waste water directly into the sewer, because the water was sour, astringent and smelly. With the advancement of science and technology, some cheese manufacturers are beginning to be dissatisfied with the status quo. They think: How much protein is still in the wastewater, why don’t we extract it and sell it for more money? As a result, people overcome technical difficulties one after another, remove the sour smell in the wastewater, and extract the whey; the whey is directly dried to obtain the whey powder. Now, infant formula milk powder contains whey powder, which is the most expensive of various ingredients, and a small tin can cost several hundred yuan.
Many people have eaten Longkou fans. The taste is tender and delicious, smooth and chewy. In the late Ming and early Qing dynasties, people from Zhaoyuan in Shandong extracted mung bean starch into vermicelli, the earliest Longkou vermicelli. However, people find that mung beans are expensive, and the cost of making fans is too high. As a result, they began to look for alternatives to mung beans. Through continuous experimentation, everyone found that the vermicelli made by extracting pea starch has better taste and lower cost. So they changed to extract starch from peas to make vermicelli, and the remaining bean dregs were fed to pigs as feed. In recent years, some people’s minds have been greatly expanded: if the value of okara can be further developed, the output value of the fan factory will be even higher. Sure enough, someone in the fan industry has overcome the problem and extracted the protein from the bean dregs to obtain pea protein. It is said that pea protein is now red and purple abroad, and demand exceeds supply. The production model of many domestic vermicelli factories has also been reversed: before, they used peas to produce vermicelli, threw away the bean dregs, and occasionally extracted a little protein as a by-product; now they mainly deal with pea protein and use vermicelli as a by-product.
After winemaking, a large amount of grape seed waste will be produced, and people have to spend money to ask someone to take it to the garbage dump for disposal. Many winery owners are not reconciled, just thinking: Can you pick something good from the grape seeds to increase the output value? As a result, some people squeeze oil from grape seeds, and some people extract polyphenolic nutrients from grape seeds. Nowadays, grape seed extract is often used in daily chemical industry, pharmaceutical industry, food and beverage industry, etc. For example, skin care products using grape seeds as raw materials can be used for beauty and skin care, anti-aging, and the skin is white, delicate and elastic.
“There is still a little protein in the waste water, it’s a shame to get rid of it.”
“The price of mung beans is too expensive. How can I make a fan if I don’t change it?”
“Processing grape seeds is really time-consuming and expensive.”
Human beings are always dissatisfied with the status quo and have all kinds of complaints. But because of dissatisfaction, people are full of ideas and strive to change the status quo. After changing, those food wastes also succeeded in “counter-attack”, and then became shining, and the limelight even overshadowed the “protagonist”.