沼氣濕式法脫硫技術包括堿性溶液吸收法、萘醌氧化法、HAPS氧化法、PDS法等。堿性溶液法吸收H2S[30]，采用逆流接觸，反應如下：

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、溫度、氣量、停留時間等因素的影響，溶解度很難保證100％，易形成NaHS，而非Na2S。NaHS再生時與氧氣反應生成硫酸鹽和硫代硫酸鹽，降低吸收液的吸收能力，從而堿液需要定期更換，也可能帶來二次污染。

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成為S單質，從而脫除H2S，回收硫，此法具有合適的氧化還原電位，易操作等優點。HAPS氧化法是以Na3PMo12O40、NaCl、Na2CO3和NaVO3的混合液作吸收液，常溫下將H2S轉化為S單質，使用后的HAPS經氧氣氧化再生后可循環使用，S單質分離回收。PDS法為鈦箐鈷磺酸鹽系化合物的混合物，脫除H2S具有工藝簡單、成本低、效果好等優點。

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.

在能源越來越緊張，環保要求越來越高的形勢下，沼氣利用對豐富和完善能源結構，緩解能源供需不平衡，提高可再生資源利用率，減少不可再生能源消耗，避免廢棄物造成環境污染，降低工業、農牧業、養殖業生成成本，提升副產品利用價值有切實的意義。因此，沼氣技術發展需要注意以下幾點：

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:

完善可再生能源激勵政策，針對沼氣工程的能量多層次利用和物質循環利用，既產生節能減排的公益性又帶來環境效益，政府應加大財政補貼和扶持力度，給予一些優惠政策，鼓勵發展；

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;

加強沼氣工程新技術和新設備研發，提高效率，降低工程成本。尤其是適合偏遠地區和孤島等地綜合利用的小型沼氣利用技術開發；

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;

對多原料高濃度聯合發酵技術研究，保證產氣原料充足，提高裝置產氣率。沼氣工程向集中化、大型化的方向發展，提高工程經濟性和能源效率；

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;

沼氣發電和用于燃料電池，是有效利用沼氣資源的新途徑，具有很大的發展潛力；

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

沼氣綜合利用技術開發，開展沼氣提純技術，可使沼氣注入天然氣網用做燃料，或代替汽油、柴油用于車輛，實現沼氣利用高端化，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.

完善和合理規劃養殖與種植產業布局，實現資源綜合平衡利用，減少輸送成本，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.

推廣沼氣農村發展，前景十分廣闊；

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

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