The people's food is the sky, and the old saying from the book "Han Shu Ji Chuan Biography" just rightly tells the importance of food to the people.

Food provides a variety of organisms with the energy needed to survive and perform a variety of activities, and to meet the diverse nutritional needs of living organisms. As technology continues to advance, more and more scientific practices have shown that food can not only “light up” our lives. It is also possible to truly generate electricity and illuminate our world with some simple devices.

Potatoes: Gifts in Poor Areas

For people living in areas with poor land, harsh climatic conditions, and backward agricultural production technologies, it is extremely difficult to obtain high-fat, high-protein foods. Potatoes, which are cheap and easy to grow, are often their main food. Starch-rich potatoes provide sugar to the body, which is the main source of energy needed to sustain life in all living things, thereby supporting the tough survival of the poor.

With the advancement of the times, in addition to satisfying the desire of the mouth, the basic material extension required for human survival is also expanding. Public infrastructure such as hydropower, which provides cleaner and safer drinking water and light, is a step closer to modern civilization.

However, for the poorest and poorly geographically diverse regions, these needs are still difficult to meet in the short term. The use of animal fats and kerosene as lighting fuels may still be more common. A simple invention from Israeli scientists is expected to bring more hope to people in poor and backward areas, especially children. It is to use their most common food - potatoes to make batteries to generate electricity.

This seemingly magical potato battery is very simple in principle and construction. The first step is to cut the potatoes into pieces and cook them in boiling water. After the potatoes were cooked, the resistance was greatly reduced, which was 10 times that of the uncooked. Further experiments have shown that boiled for 8 minutes or boiled in salt water, power generation and preservation may be better. Then, tin foil and copper foil are attached to both sides of the potato chip, and the two metal foils are connected with wires, and after forming the passage, the small electric beads connected in series in the circuit are brightened. The specific principle is that the potato provides the electrolyte required for the chemical reaction, and the two layers of metal are the positive and negative electrodes. Each potato battery can generate 0.7 volts. When multiple potato batteries are connected in series, it will provide a larger voltage. It is said that the battery can be powered for several days or even weeks. Experts involved in the experiment said that the potatoes used in the experiment were planted from the most common land in the world, thus ensuring the application of the results to the world.

"This research has its meaning." Inventor, Israeli agricultural professor Heim said that using potatoes to generate electricity is common because potatoes are grown in 110 countries around the world. They are available in 150 countries around the world, cheap and shelf life. long. Potato power generation is 5-50 times cheaper than normal commercial batteries and at least 6 times brighter than kerosene lamps. I hope that in the future, technology will be freely applied to poor and backward areas to promote local infrastructure construction.

With the extensive research results of potato batteries, people have further discovered through simple experiments that not only potatoes can be used to generate electricity, but other acidic fruits can also be used for power generation. The food list has been expanded to oranges, lemons, limes, grapefruits, vinegar and more. An ordinary orange with galvanized nails and copper wire positive and negative poles produces enough power to illuminate the LED lights.

Expired food can also glow

As described in a public service advertisement, when a child in an extremely poor region of Africa is hunger-scarred and shackled by a hunger, the trash can on the other side of the world is covered with various expired bread, milk, and after meals. The discarded food is stuffed. On the other side of food scarcity is food waste.

According to a report issued by the United Nations [microblogging] FAO, 1.3 billion tons of food is wasted every year, which is equivalent to one-third of the food already produced. 54% of food waste occurs during production, post-harvest handling and storage. Another 46% of food waste occurs during food processing, distribution, and consumption. Regardless of the waste, the direct economic impact on producers is as high as $750 billion annually.

People in food-rich areas have realized that they need to cherish food and save food. But for various reasons, such waste seems to be unavoidable. Therefore, we must also face the follow-up problem caused by food waste - how to properly handle expired and surplus food.

Many years ago, leftovers and expired food were allowed to be used as feed for animals. As people's awareness of food safety continues to deepen. This type of waste utilization has also been explicitly banned. Is it that the food produced after sowing, cultivation, harvesting, production and processing, and so on, will only be sent to the landfill?

Some foreign companies and organizations have given the answer, no, they can continue to shine.

According to the BBC, a branch of the Sainsbury chain in Cannock, England, will leave the grid and plan to use expired food to generate electricity and be self-sufficient. The principle of using food to generate electricity is simple. The chain sends out-of-date food from its many stores to a professional waste disposal company. The waste disposal company has an anaerobic decomposition system similar to bovine stomach function. Pour expired food into an anaerobic tank and mix with anaerobic bacteria that can multiply rapidly under anaerobic conditions. The bacteria are decomposed in multiple steps by bacteria, and finally carbon dioxide and methane gas are produced. The waste treatment company will further separate the purified gas to obtain natural gas and generate electricity. Then send the electricity to the supermarket chain through the transmission line.

In Japan, the raw materials for power generation are aimed at the famous Udon noodles, and the udong noodles that do not meet the standard and leftover are recovered. Water is added to these mixtures for fermentation and several purifications. Finally, 10% becomes ethanol. The remaining material continues to be processed and methane is obtained and then generated. This factory can produce 180,000 kWh per year. The remaining raw materials will be further developed into fertilizers for wheat and onions.

The principle of using food to illuminate heat seems to be simple, and still faces some difficulties in actual operation. For example, carbon dioxide can be produced to pollute the atmosphere. However, experts believe that the positive effects of food power generation are even greater. In addition, food residues recovered from restaurants are often easily mixed into foreign bodies such as wine bottle caps, cutlery, and plastics, which will increase the difficulty of handling. In addition, the stability of the source of discarded food is also facing challenges.

However, relevant practitioners believe that the public's awareness of waste sorting and recycling will be more and more bright, and the roads that use waste food to generate electricity will become brighter and brighter. Tips: [Follow the WeChat public number " Jiuzheng Lighting Network "; pay attention to courtesy, scan code to send millions of business opportunities! Jiuzheng Lighting Network QQ Group]

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