What are the types of biomass energy sources?

Based on the different sources, biomass suitable for energy use can be divided into five categories: forestry resources, agricultural resources, domestic sewage and industrial organic wastewater, municipal solid waste and animal manure.

1, forestry resources

Forestry biomass resources refers to the growth of forests and forestry production process to provide biomass energy sources, including charcoal forests, in the forest nursery and inter-felling operations in the scattered timber, residual twigs, leaves, and wood chips, etc.; timber harvesting and processing of branches, sawdust, wood shavings, tips, skins and cut-offs, etc.; forestry by-products of the waste, such as shell and kernels, etc.

2, agricultural resources

Agricultural biomass energy resources refers to agricultural crops (including energy crops); agricultural production process waste, such as crop residues in the farmland during crop harvesting crop residue (corn stalks, sorghum stalks, wheat straw, straw, soybean stalks and cotton stalks, etc.); agricultural processing industry waste, such as rice husk left over from the agricultural production process.

Energy plants refer to a variety of plants used to provide energy, usually including herbaceous energy crops, oil crops, hydrocarbon plants and aquatic plants and other categories.

3, sewage wastewater

Life wastewater is mainly composed of urban residents living, commercial and service industry drainage, such as cooling water, bathing drainage, washing drainage, laundry drainage, kitchen drainage, fecal waste water. Industrial organic wastewater is mainly alcohol, brewing, sugar, food, pharmaceutical, papermaking and slaughtering and other industries in the production process of wastewater, etc., which are rich in organic matter.

4, solid waste

Municipal solid waste is mainly composed of urban residential garbage, commercial, service industry garbage and a small amount of construction waste and other solid waste. Its composition is complex and is affected by factors such as the average living standard of local residents, energy consumption structure, town construction, natural conditions, traditional habits and seasonal changes.

5, livestock and poultry manure

Livestock and poultry manure is a general term for livestock and poultry excreta, which is a transformed form of other forms of biomass (mainly grains, crop residues and pasture, etc.), including feces discharged by livestock and poultry, urine and its mixture with bedding grass.

6, biogas

Biogas is a combustible gas converted from biomass energy. Biogas is a mixture, the main component is methane (CH4). Biogas is a mixture of gases produced by microbial fermentation of organic material under anaerobic conditions. The gas is called biogas because it was first found in swamps.

A variety of organic materials such as human and animal feces, straw, sewage, etc. are fermented under anaerobic (no oxygen) conditions in closed digesters, and a great variety of biogas-fermenting microorganisms decompose and transform them, thus producing biogas. Biogas is a mixture of gases that can be burned. It can usually be used by farmers for cooking and lighting.

Biomass energy features:

1, renewable

Biomass is a renewable resource, biomass energy can be regenerated through the photosynthesis of plants, and wind, solar energy and other renewable energy sources, abundant resources, to ensure the sustainable use of energy;

2, low-polluting

2, low-polluting

Biomass is a renewable resource. p>

The sulfur and nitrogen content of biomass is low, and less SOX and NOX are generated in the combustion process; when biomass is used as a fuel, the carbon dioxide needed for its growth is equal to the amount of carbon dioxide it emits, thus the net carbon dioxide emission to the atmosphere is close to zero, which can effectively reduce the greenhouse effect;

3. Widely Distributed

The regions that are lacking in coal can make full use of biomass energy;

The regions that are lacking in coal can make full use of biomass energy.

4, the total amount of very rich

Biomass energy is the world's fourth largest energy source, second only to coal, oil and natural gas. According to biologists estimate that the Earth's land annual production of 1000 to 125 billion tons of biomass; ocean annual production of 50 billion tons of biomass. The annual production of biomass energy far exceeds the world's total energy demand, equivalent to 10 times the world's total energy consumption. China can be developed as energy biomass resources by 2010 up to 300 million tons.

With the development of agriculture and forestry, especially the promotion of charcoal-fired forests, biomass resources will be more and more.

5, a wide range of applications

Biomass energy can be biogas, compressed molded solid fuel, gasification to produce gas, gasification to generate electricity, the production of fuel alcohol, thermal cracking to produce biodiesel and other forms of existence, applied to all areas of the national economy.

Reference for the above: Baidu Encyclopedia-Biomass Energy