Can be made into commercial fertilizer.
Straw usually contains 3-5% ash. This kind of ash is collected in the form of boiler fly ash and slag/bottom ash, which is rich in nutrients such as potassium, magnesium, phosphorus and calcium, and can be used as efficient agricultural fertilizer.
Straw is a good clean and renewable energy, and it is one of the most potential new energy sources for development and utilization, with good economic, ecological and social benefits. Straw power generation is a kind of power generation mode with crop straw as the main fuel, which is divided into straw gasification power generation and straw combustion power generation.
As a traditional energy conversion method, direct combustion of crop straw has the characteristics of low cost, economy and convenience, and can be used for heating small and medium-sized enterprises, schools, governments and township residents in the main crop straw producing areas in winter.
Extended data:
Advantages of straw power generation
1, the amount of crop straw is large, the coverage is wide, and the fuel source is sufficient.
2. The sulfur content of straw is very low. The relevant research of the International Energy Agency shows that the average sulfur content of straw is only 3.8‰, while the average sulfur content of coal is about 1%.
3. The calorific value of various crop straws is slightly different, but after determination, the calorific value of straw is about 15000KJ/Kg, which is equivalent to 50% of standard coal. Among them, the calorific value of wheat straw and corn straw is the smallest among crop straws, and the low calorific value is also 14.4MJ/kg, which is equivalent to 0.492kg standard coal. Using straw to generate electricity can reduce coal consumption.
4. As a fuel, coal mining has certain risks, especially mine mining, which is difficult to manage. In contrast, crop straw is less dangerous and easy to manage, which belongs to waste utilization.
Baidu encyclopedia-straw power generation