沼气湿式法脱硫技术包括碱性溶液吸收法、萘醌氧化法、HAPS氧化法、PDS法等。碱性溶液法吸收H2S[30]，采用逆流接触，反应如下：

The wet desulfurization technology of biogas includes alkaline solution absorption method, naphthoquinone oxidation method, HAPS oxidation method, PDS method, etc. The alkaline solution method absorbs H2S [30], using countercurrent contact, and the reaction is as follows:

吸收受到流速、流量、温度、气量、停留时间等因素的影响，溶解度很难保证100％，易形成NaHS，而非Na2S。NaHS再生时与氧气反应生成硫酸盐和硫代硫酸盐，降低吸收液的吸收能力，从而碱液需要定期更换，也可能带来二次污染。

The absorption is affected by factors such as flow rate, flow rate, temperature, gas volume, and residence time, making it difficult to ensure 100% solubility and easy to form NaHS instead of Na2S. During NaHS regeneration, it reacts with oxygen to generate sulfates and thiosulfates, reducing the absorption capacity of the absorption solution. As a result, the alkaline solution needs to be replaced regularly and may also cause secondary pollution.

萘醌氧化法是氧化H2S成为S单质，从而脱除H2S，回收硫，此法具有合适的氧化还原电位，易操作等优点。HAPS氧化法是以Na3PMo12O40、NaCl、Na2CO3和NaVO3的混合液作吸收液，常温下将H2S转化为S单质，使用后的HAPS经氧气氧化再生后可循环使用，S单质分离回收。PDS法为钛箐钴磺酸盐系化合物的混合物，脱除H2S具有工艺简单、成本低、效果好等优点。

The naphthoquinone oxidation method oxidizes H2S into elemental S, thereby removing H2S and recovering sulfur. This method has the advantages of suitable redox potential and easy operation. The HAPS oxidation method uses a mixture of Na3PMo12O40, NaCl, Na2CO3, and NaVO3 as the absorption solution to convert H2S into elemental S at room temperature. The used HAPS can be recycled after oxygen oxidation regeneration, and elemental S can be separated and recovered. The PDS method is a mixture of titanium cobalt sulfonate compounds, which has the advantages of simple process, low cost, and good effect in removing H2S.

在能源越来越紧张，环保要求越来越高的形势下，沼气利用对丰富和完善能源结构，缓解能源供需不平衡，提高可再生资源利用率，减少不可再生能源消耗，避免废弃物造成环境污染，降低工业、农牧业、养殖业生成成本，提升副产品利用价值有切实的意义。因此，沼气技术发展需要注意以下几点：

In the context of increasingly scarce energy and higher environmental requirements, the utilization of biogas has practical significance in enriching and improving the energy structure, alleviating the imbalance between energy supply and demand, improving the utilization rate of renewable resources, reducing non renewable energy consumption, avoiding environmental pollution caused by waste, reducing the production costs of industry, agriculture, animal husbandry, and animal husbandry, and enhancing the value of by-product utilization. Therefore, the development of biogas technology needs to pay attention to the following points:

完善可再生能源激励政策，针对沼气工程的能量多层次利用和物质循环利用，既产生节能减排的公益性又带来环境效益，政府应加大财政补贴和扶持力度，给予一些优惠政策，鼓励发展；

Improve incentive policies for renewable energy, targeting the multi-level utilization of energy and material recycling in biogas projects, which not only generates public benefits such as energy conservation and emission reduction, but also brings environmental benefits. The government should increase financial subsidies and support, provide some preferential policies, and encourage development;

加强沼气工程新技术和新设备研发，提高效率，降低工程成本。尤其是适合偏远地区和孤岛等地综合利用的小型沼气利用技术开发；

Strengthen the research and development of new technologies and equipment for biogas engineering, improve efficiency, and reduce project costs. Especially for the development of small-scale biogas utilization technologies suitable for comprehensive utilization in remote areas and isolated islands;

对多原料高浓度联合发酵技术研究，保证产气原料充足，提高装置产气率。沼气工程向集中化、大型化的方向发展，提高工程经济性和能源效率；

Research on high concentration co fermentation technology with multiple raw materials to ensure sufficient gas production raw materials and improve the gas production rate of the equipment. The biogas engineering is developing towards centralization and large-scale, improving the economic efficiency and energy efficiency of the project;

沼气发电和用于燃料电池，是有效利用沼气资源的新途径，具有很大的发展潜力；

Biogas power generation and its use in fuel cells are new ways to effectively utilize biogas resources and have great development potential;

沼气综合利用技术开发，开展沼气提纯技术，可使沼气注入天然气网用做燃料，或代替汽油、柴油用于车辆，实现沼气利用高端化，提高能源效益。

The development of biogas comprehensive utilization technology and the implementation of biogas purification technology can inject biogas into the natural gas network for fuel, or replace gasoline and diesel for vehicles, achieving high-end utilization of biogas and improving energy efficiency.

完善和合理规划养殖与种植产业布局，实现资源综合平衡利用，减少输送成本，提高效益。

Improve and reasonably plan the layout of aquaculture and planting industries, achieve comprehensive and balanced utilization of resources, reduce transportation costs, and improve efficiency.

推广沼气农村发展，前景十分广阔；

The promotion of biogas for rural development has a very broad prospect;

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