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In recent years, driven by policy support and rising environmental awareness, the biogas industry has experienced rapid development. From the treatment of farm waste to the anaerobic fermentation of municipal sewage sludge, biogas projects are emerging everywhere. However, the hydrogen sulfide content in biogas varies significantly depending on the raw materials and fermentation conditions, generally ranging from several hundred to several thousand, or even tens of thousands of ppm. If desulfurization is not carried out promptly and effectively, hydrogen sulfide will not only corrode biogas generation equipment and gas transmission pipelines but also reduce the calorific value of biogas, affecting the quality of the energy. When using traditional desulfurization technologies to treat gases, biogas projects are usually spread out over various locations, and they often face issues such as low efficiency, high costs, and secondary pollution. The LYSY complexed iron desulfurization technology developed by GreenSource Environmental Protection, thanks to its excellent overall performance and advanced desulfurization capabilities, has quickly become a focus in this industry. It has helped many companies overcome environmental challenges, making it a trusted partner. The LYSY complexed iron process is a green gas purification technique based on Fe-based catalysts for wet oxidation; it is a technology that combines desulfurization with sulfur recovery, directly converting H2S into elemental S in the liquid phase. The reaction process can be summarized as follows: in the absorption zone, dissolved H2S is ionized to HS-, which then reacts with Fe3+. HS- is oxidized to elemental S, while Fe3+ is reduced to Fe2+. Air is blown in to oxidize Fe2+ back to Fe3+, and the solution is recycled; the entire process is green and efficient. LYSY’s iron-based complexation desulfurization technology boasts advantages such as high efficiency, environmental friendliness, and low cost. Its process strengths are reflected in the following aspects: 1. High desulfurization efficiency – it can rapidly and thoroughly remove hydrogen sulfide (H₂S) from gases, with high precision; it is capable of reducing the H₂S concentration in gases to extremely low levels (usually below 100 ppm), achieving a desulfurization rate of up to 99.9%. This thorough removal ensures that the standards are consistently met, satisfying strict environmental and operational requirements. 2. Fast reaction speed: By using complexed iron ions as a catalyst, the oxidation rate of H₂S can be greatly increased, allowing the desulfurization process to be completed in a short time. The equipment required is relatively compact, making it suitable for industrial continuous operation. 3. Low operating costs: High sulfur capacity and low circulation volume result in cost savings. The working fluid has an extremely high sulfur capacity, which means that less circulating fluid is required to treat the same amount of H₂S. This reduces the size and investment costs of equipment such as desulfurization towers, regeneration tanks, and circulation pumps, while also lowering operational energy consumption. 4. Simple to operate and highly stable: The process flow is relatively simple, requiring no complex equipment or stringent operating conditions ； The complexed iron catalyst has stable performance and is not prone to failure; it can maintain efficient desulfurization effects over a wide range of temperatures and pressures, and it possesses strong resistance to interference. 5. Good environmental performance: The desulfurization product is usually elemental sulfur, which is easy to separate and recover; there is no secondary pollution, and emissions of waste materials are at a \"near-zero\" level, allowing for resource utilization ； The entire process does not require the use of toxic or harmful chemicals, in line with the concept of green and environmentally friendly development. 6. It is shipped in skid-mounted format, offering environmental benefits and convenience; it features a high degree of automation and flexible operation. The skid-mounted design facilitates easy deployment: the entire desulfurization system can be standardized and shipped in this skid-mounted form. Automatic control: The system is equipped with an intelligent monitoring module, enabling unattended operation and reducing the need for manual intervention. Lvyuan Environmental Protection is a technology-driven company specialized in gas desulfurization and decarbonization processes. Thanks to its high-quality desulfurization equipment based on LYSY complexed iron and advanced desulfurization technologies, along with process flows tailored for the treatment of biogas and natural gas, it ensures that every volume of gas is utilized to the fullest extent, making the use of gas energy more economical and thereby contributing a \"green drive\" to sustainable development.