Classification of biomass

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There are different criteria for how biomass energy is classified. For example, based on whether it can replace conventional fossil energy on a large scale, it is divided into traditional biomass energy and modern biomass energy. Broadly speaking, traditional biomass signifiers are developing * * Small-scale application of biomass energy mainly includes rural domestic energy: Firewood, straw, rice straw, rice husk and other agricultural production waste and livestock and poultry manure, etc. ； Modern biomass energy refers to biomass energy that can be applied on a large scale, including waste from modern forestry production, sugarcane bagasse and municipal solid waste. The following will classify biomass suitable for energy utilization into five major categories based on different sources: forestry resources, agricultural resources, domestic sewage and industrial organic wastewater, municipal solid waste, and livestock and poultry manure. (1) Forestry resources Forestry biomass resources refer to the biomass energy provided by forest growth and forestry production processes, including scattered wood, residual branches, leaves and sawdust in firewood forests, reforest tending and thinning operations, etc. ； Branches, sawdust, wood chips, tips, boards and truncation during wood harvesting and processing ； Forestry by-product waste, such as fruit shells and cores. (2) Agricultural resources Agricultural biomass energy resources refer to agricultural crops (including energy plants) ； Waste in the agricultural production process, such as crop straw (corn straw, sorghum straw, wheat straw, rice straw, soybean straw, cotton straw, etc.) left in the farmland during harvest ； Waste from the agricultural processing industry, such as rice husks remaining in the agricultural production process. Energy plants generally refer to various plants used to provide energy, usually including herbaceous energy crops, oil crops, hydrocarbon-producing plants and aquatic plants. (3) Domestic sewage and industrial organic wastewater Domestic sewage mainly consists of various drainages from urban residents’ lives, commerce and service industries, such as cooling water, bath drainage, toilet drainage, laundry drainage, kitchen drainage, fecal sewage, etc. Industrial organic wastewater is mainly wastewater discharged from the production processes of alcohol, brewing, sugar, food, pharmaceutical, papermaking and slaughtering industries, etc., all of which are rich in organic matter. (4) Municipal solid waste Municipal solid waste mainly consists of solid waste such as urban residents’ domestic waste, commercial and service industry waste, and a small amount of construction industry waste. Its composition is relatively complex and is affected by the average living standards of local residents, energy consumption structure, urban construction, natural conditions, traditions and * Affected by factors such as habits and seasonal changes. (5) Livestock and poultry manure Livestock and poultry manure is the general term for livestock and poultry excrement. It is the transformation form of other forms of biomass (mainly grain, crop straw and pasture, etc.), including feces, urine and their mixture with bedding excreted by livestock and poultry. The main livestock and poultry in my country include chickens, pigs and cattle, and their resource amounts are related to livestock production. Based on factors such as the breed, weight, and amount of fecal excretion of these livestock and poultry, it can be estimated that the physical amount of resources available for livestock and poultry feces nationwide in 2000 was 320 million tons of dry matter.