生物脫硫的原理主要基于微生物或其所含的酶對含硫化合物進行催化作用，將其中的硫釋放出來或轉化為其他形態。以下是生物脫硫原理的詳細解釋：

　　The principle of biological desulfurization is mainly based on the catalytic action of microorganisms or their enzymes on sulfur-containing compounds, releasing or converting the sulfur into other forms. The following is a detailed explanation of the principle of biological desulfurization:

　　一、基本原理

　　1、 Basic principles

　　生物脫硫，又稱生物催化脫硫（Biocatalytic Desulfurizaton，簡稱BDS），是一種在常溫常壓下利用脫硫細菌將硫化物轉化為單質硫或硫酸鹽的脫硫方法。基本原理是H2S氣體被吸收液吸收轉化為硫化物，然后被脫硫細菌吸收至體內，作為營養物質被脫硫細菌分解、氧化、利用，在脫硫的同時為脫硫細菌的生長繁衍提供能量。

　　Biological desulfurization, also known as biocatalytic desulfurization (BDS), is a desulfurization method that uses desulfurization bacteria to convert sulfides into elemental sulfur or sulfate at room temperature and pressure. The basic principle is that H2S gas is absorbed and converted into sulfides by the absorption solution, and then absorbed into the body by desulfurization bacteria. As a nutrient, it is decomposed, oxidized, and utilized by desulfurization bacteria, providing energy for the growth and reproduction of desulfurization bacteria during desulfurization.

　　二、過程階段

　　2、 Process Stage

　　生物脫硫的過程主要分為三個階段：

　　The process of biological desulfurization is mainly divided into three stages:

　　H2S氣體的吸收過程：硫化氫氣體由氣相轉移至液相，被吸收液吸收轉變為硫化物。

　　The absorption process of H2S gas: Hydrogen sulfide gas is transferred from the gas phase to the liquid phase, and is absorbed by the absorption liquid to transform into sulfides.

　　硫化物的吸附吸收過程：溶解至水溶液中的硫化物被脫硫細菌吸附吸收，從水溶液中轉移至脫硫細菌的體內。

　　The adsorption and absorption process of sulfides: Sulfides dissolved in aqueous solution are adsorbed and absorbed by desulfurization bacteria, and transferred from the aqueous solution to the bodies of desulfurization bacteria.

　　生物氧化的過程：進入脫硫細菌體內的硫化物被用作能源或養分，在細菌體內酶的作用下氧化分解和利用，從而達到去除H2S的目的。

　　The process of biological oxidation: Sulfides entering the desulfurization bacteria are used as energy or nutrients, and are oxidized, decomposed, and utilized by enzymes in the bacteria to achieve the goal of removing H2S.

　　三、具體方法與技術

　　3、 Specific methods and techniques

　　生物脫硫技術包括生物過濾法、生物吸附法和生物滴濾法等，這些方法均利用特定的微生物種群在適宜的環境下對含硫化合物進行催化轉化。

　　Biological desulfurization technology includes biological filtration, biological adsorption, and biological drip filtration, all of which utilize specific microbial populations to catalyze the conversion of sulfur-containing compounds in suitable environments.

　　生物過濾法：氣體中的硫化氫被填料表面的微生物吸收并催化轉化生成元素硫，進而轉換成硫酸。生成的硫酸定時或定pH排出系統，此過程周而復始，實現脫硫過程。

　　Biological filtration method: Hydrogen sulfide in the gas is absorbed by microorganisms on the surface of the packing and catalytically converted into elemental sulfur, which is then converted into sulfuric acid. The generated sulfuric acid is discharged from the system at a fixed time or pH, and this process repeats itself to achieve desulfurization.

　　生物吸附法：利用吸附材料（如活性炭、樹脂等）吸附含硫化合物，同時吸附材料上附著的微生物對吸附的含硫化合物進行催化轉化。

　　Biological adsorption method: using adsorption materials (such as activated carbon, resin, etc.) to adsorb sulfur-containing compounds, while the microorganisms attached to the adsorption materials catalyze the conversion of the adsorbed sulfur-containing compounds.

　　生物滴濾法：含硫氣體通過滴濾塔時與塔內的微生物接觸，微生物利用含硫化合物作為能源進行生長繁殖，同時將含硫化合物轉化為無害物質。

　　Biological drip filtration method: When sulfur-containing gas passes through the drip filtration tower, it comes into contact with microorganisms inside the tower. Microorganisms use sulfur-containing compounds as energy for growth and reproduction, while converting sulfur-containing compounds into harmless substances.

　　四、脫硫細菌的作用

　　4、 The role of desulfurization bacteria

　　在生物脫硫過程中，脫硫細菌起著至關重要的作用。這些細菌能夠選擇性地氧化含硫化合物中的硫原子，而保留其他部分的分子結構。常用的脫硫細菌有硫桿菌屬的氧化亞鐵硫桿菌、脫氮硫桿菌及排硫桿菌等。這些細菌在適宜的pH值、溫度和營養條件下能夠高效地進行脫硫作用。

　　In the process of biological desulfurization, desulfurization bacteria play a crucial role. These bacteria are capable of selectively oxidizing sulfur atoms in sulfur-containing compounds while retaining the molecular structure of other parts. The commonly used desulfurization bacteria include Acidithiobacillus ferrooxidans, denitrifying Acidithiobacillus, and sulfur eliminating bacteria of the genus Thiobacillus. These bacteria can efficiently carry out desulfurization under suitable pH, temperature, and nutritional conditions.

　　五、應用實例與優勢

　　5、 Application examples and advantages

　　生物脫硫技術在多個領域得到廣泛應用，如石油煉制、天然氣凈化、煤化工等。與傳統理化脫硫方法相比，生物脫硫具有條件溫和、硫化氫去除比例高、無二次污染等優勢。同時，生物脫硫技術還具有設備簡單、操作方便、投資少等特點。

　　Biological desulfurization technology has been widely applied in various fields, such as petroleum refining, natural gas purification, coal chemical industry, etc. Compared with traditional physical and chemical desulfurization methods, biological desulfurization has the advantages of mild conditions, high hydrogen sulfide removal ratio, and no secondary pollution. Meanwhile, biological desulfurization technology also has the characteristics of simple equipment, easy operation, and low investment.

　　綜上所述，生物脫硫的原理是基于微生物或其所含的酶對含硫化合物進行催化轉化作用。通過合理的工藝設計和操作條件控制，生物脫硫技術能夠實現高效、環保的脫硫效果。

　　In summary, the principle of biological desulfurization is based on the catalytic conversion of sulfur-containing compounds by microorganisms or their enzymes. Through reasonable process design and control of operating conditions, biological desulfurization technology can achieve efficient and environmentally friendly desulfurization effects.

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