- Apr 04, 2018 -
Do you know that agricultural waste can also become a treasure?
Agricultural waste, ie agricultural waste, refers to organic substances that are discarded throughout the agricultural production process. The agricultural waste that we usually refer to mainly refers to crop straws and livestock and poultry excrement, and also includes dead animals, waste agricultural film, and waste pesticide packages.
When you think of straw, what is reflected in your mind first? Most of it may be used as fuel, but many cities are now beginning to eliminate such behavior. How should the stalks achieve "magnificent turns"? In fact, more than half of the products of crop photosynthesis exist in straw, which is rich in nitrogen, phosphorus, potassium, calcium, magnesium and organic matter, and is a valuable biological resource.
Is there any magical use of straw other than fertilizer? In China, the production of clay bricks each year requires the consumption of more than 70 million tons of standard coal, and the energy consumption of air-conditioning for buildings using traditional brick materials must also increase significantly. Therefore, replacing straw bricks with straw is undoubtedly a good method for environmental protection and energy conservation. In addition, straw can also be used to make rayon and rayon, furfural, caramel, and alcohol.
According to the research results of the Renewable Clean Energy Laboratory of the University of Science and Technology of China, straw can also be used to make bio-oil. The oil production rate is over 50%, and the prices are only 43.2% and 63.1% of diesel and heavy oil. In the "Guiding Opinions on the Construction of Straw Gasification Clean Energy Utilization Project," it is pointed out that by 2020, a number of straw gasification and clean energy utilization and implementation counties will be established, and the comprehensive utilization rate of straw in the implementation region will reach over 85%, effectively replacing rural scattered materials. Coal supplies heating and clean gas to households and public facilities such as township schools, hospitals, and nursing homes.
How to use straw abroad is really a big hole!
1. Denmark: Straw bunched up "Golden Circle"
Denmark is the first country in the world to use straw for power generation. The Avedo Power Plant, located south of Copenhagen in the Danish capital, was built in the 1990s and is regarded as one of the most efficient and environmentally friendly power plants in the world. The Avedo Power Plant burns 150,000 tons of straw each year to meet the heating and electricity demand of hundreds of thousands of users.
Compared with coal, oil and natural gas, straw has low cost and less pollution, and is considered by the plant to be the most cost-effective fuel. In addition, straw ash burned by straw can also be returned to farmers as fertilizer without compensation. Using straw to generate electricity, power plants have reduced the cost of raw materials, people have enjoyed cheaper electricity prices, the environment has been protected, new energy has been developed, and farmers have increased their incomes, creating a “golden circle” in tandem.
2. U.S.: Straw Ethanol Becomes New Favorite
There are 24 agricultural states in the United States and every year a large amount of straw needs to be processed. Straw has a wide range of uses in the United States. There are four main types of straw: First, it is eaten by livestock. Second, compost in the fields. Third, when home accessories and building materials. Fourth, turn green fuel.
Recently, the development and utilization of emerging alternative fuels, especially biofuels, have received strong support from the federal government. According to the data provided by the American Renewable Fuels Association, the United States currently has 116 ethanol refineries and can produce 5.9 billion gallons of ethanol per year. There are also 81 new factories under construction.
3. Japan: Straw Art Festival
In Japan, the straw in the field is also made into a lovely mammoth and turtle shape. This kind of field art can store straw and attract foreign tourists.
In Niigata, people celebrated the harvest of rice, dried up a large amount of straw left by rice harvesting, and creatively built huge straw sculptures. At the local “Straw Arts Festival”, people also exhibited thousands of straw sculptures. Visitors go to watch .