Biomass energy refers to the energy that plant chlorophyll converts solar energy into chemical energy and stores it in biomass. Solid biomass is converted into combustible gas, tar, etc. Through thermochemical conversion technology, biomass is converted into biogas, alcohol and so on. Through biochemical transformation technology and microbial fermentation, biomass is compressed into high-density solid fuel through dense molding technology.

Biomass energy includes: energy trees, energy crops, aquatic plants and various organic wastes. They are renewable resources transformed from plant photosynthesis.

Biomass can be divided into broad sense and narrow sense. Biomass in a broad sense refers to all kinds of organisms produced by photosynthesis in the atmosphere, water and land. That is, all living and growing organic substances are collectively referred to as biomass, including all plants, microorganisms, animals that feed on plants and microorganisms and their wastes.

In a narrow sense, biomass mainly refers to lignocellulose such as straws and trees in the process of agricultural and forestry production, leftovers from agricultural products processing, agricultural and forestry wastes and livestock manure and wastes in the process of animal husbandry production.

Extended data:

Biomass energy has four characteristics:

1, one is renewability. Because it can be formed by photosynthesis of plants, biomass energy, like wind energy and solar energy, is a renewable energy source, which is continuously generated to ensure sustainable utilization.

2. The second is environmental protection. On the one hand, because the sulfur content and nitrogen content in biomass are very low, harmful gases will not be produced during combustion; On the other hand, the amount of carbon dioxide released by biomass combustion is equivalent to the amount of carbon dioxide needed for its growth, so the net emission of carbon dioxide to the atmosphere is close to zero, which will not aggravate the greenhouse effect.

3. Third, it is widely distributed and rich in total. According to biologists' estimation, the land produces 654.38+000 billion-654.38+025 billion tons of biomass every year; The ocean produces 50 billion tons of biomass every year. The annual output of biomass energy far exceeds the total annual energy demand in the world.

Fourth, the scope of application is wide. Biomass energy can exist in the form of biogas, compression molding solid fuel, gasification to produce gas, gasification to produce electricity, fuel alcohol production and biodiesel production through thermal cracking, and it is applied in various fields of national economy.

Baidu encyclopedia-biomass energy

People's Network-"Classical" Energy embarks on the road of revival-China has achieved fruitful results in the development and utilization of biomass energy.