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portuguêsAn Introduction to Raw Materials Used in Biogas Plant
2025-01-16
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2025-01-16
The composition of raw materials for biogas production often shows diversity. As the core site of comprehensive organic waste management, biogas plants excel in receiving and transforming various rich raw materials. Utilizing advanced co-digestion technology, biogas facilities cleverly combine inputs such as manure and straw, significantly enhancing system robustness and adaptability. This strategy not only broadens the scope of organic waste treatment but also ensures the efficiency and continuity of biogas production.
When dealing with these diverse raw materials for biogas production, biogas plants have demonstrated excellent waste management capabilities. Through the ingenious integration of various inputs, they optimize system performance. The emphasis on co-digestion technology further proves the exceptional adaptability and practical efficacy of biogas projects in sustainable organic waste management, highlighting their important role in environmental protection and resource recycling.
From analyzing the definition of biogas, it can be known that raw materials for biogas production comprises organic materials, including agricultural organic waste, industrial high-concentration organic wastewater, and industrial organic residues, sludge, etc.
Agricultural Organic Waste
As one of the important raw materials for biogas production, its scope is very broad. This type of waste mainly includes crop straw produced during agricultural production activities. These straws are often piled up in large quantities after the harvest season, becoming potential resources for biogas production.
Meanwhile, livestock manure produced throughout the production process in the breeding industry is also an indispensable biogas production raw material. They are rich in organic matter and nutrients required by microorganisms, providing good conditions for biogas fermentation.
Industrial High-Concentration Organic Wastewater
It is also an important source of biogas production. This type of wastewater is mainly produced in industrial production processes such as brewing, papermaking, and food processing, with chemical oxygen demand (COD) generally greater than 2000 mg/L, indicating that it contains a large amount of organic matter. Through appropriate pretreatment and fermentation processes, the organic matter in these wastewaters can be effectively converted into biogas, realizing resource recycling.
Points Worth Noting
The nature of the fermentation feedstock has an important impact on biogas production. The physical and chemical properties of the feedstock, such as moisture content, organic matter content, pH value, etc., will directly affect the selection of the digestion process, the length of the fermentation time, and the biogas yield. Therefore, in the biogas production process, it is necessary to scientifically and reasonably handle and optimize according to the specific properties of the feedstock to ensure the smooth progress and efficient output of biogas production.
On the whole, the more mature biomass energy technologies that can achieve large-scale development and utilization in the world mainly include biomass power and heat generation, bio-liquid fuels, biogas, and biomass solid fuels. In addition, there are many biomass energy conversion technologies such as direct combustion technology, densification technology, gasification technology, pyrolysis, oleochemical technology, landfill gas power generation and heating, biomass fermentation ethanol technology, carbonization technology, and biogas power generation technology.
As a gaseous biomass energy, biogas's production feedstocks mainly include animal manure, energy crops, organic residues, or waste and by-products from the food industry. Therefore, rural areas are the primary regions for biogas production. Raw materials for biogas production are fermented by bacteria in closed fermentation tanks at temperatures between 32 to 42 degrees Celsius, ultimately forming a mixed gas consisting of about two-thirds methane, more than one-third carbon dioxide, and traces of nitrogen, hydrogen, oxygen, etc., which is biogas.
After refining and processing, biogas can yield bio-methane with a purity higher than 96%, which can directly enter natural gas pipelines. Moreover, the carbon dioxide captured during the methane refining process can also be used for the methanation process in power-to-gas technology or other purposes.
To sum up, the diversity and wide range of raw materials for biogas production provide a solid foundation for the development of the biogas industry. By fully utilizing agricultural organic waste and industrial high-concentration organic wastewater as feedstocks, we can not only achieve effective resource recycling but also make positive contributions to environmental protection and energy supply.
