生物法脱硫技术是人们由于传统物理法和化学法有其自身难以克服的缺点而发展起出来的一种新脱硫技术，此法具有诱人的工业应用前景，但其起步晚，技术及工艺还很不成熟。

Biological desulfurization technology is a new desulfurization technology developed by people due to the inherent shortcomings of traditional physical and chemical methods that are difficult to overcome. This method has attractive industrial application prospects, but it started late and the technology and process are still immature.

人们对生物法脱硫研究始于19世纪50年代，到80年代在一些发达国家得到很大发展，像德国。传统脱除H2S的物理法和化学法虽各有优点，但存在着运行费用高，工艺复杂，产生二次污染和能耗大等缺点；相比之下，生物法脱除H2S具有能耗低、操作方便、无二次污染，投资少等优点。

The research on biological desulfurization began in the 1850s and developed significantly in some developed countries, such as Germany, by the 1980s. Although traditional physical and chemical methods for removing H2S have their own advantages, they have disadvantages such as high operating costs, complex processes, secondary pollution, and high energy consumption; In contrast, biological removal of H2S has the advantages of low energy consumption, convenient operation, no secondary pollution, and low investment.

反应式为：

The reaction equation is:

H2S + OH- → HS- + H2O

H2S + OH- → HS- + H2O

H2S + CO32- → HS- + HCO3-

H2S + CO32- → HS- + HCO3-

2HS- +O2 → 2S + 2OH-

2HS- +O2 → 2S + 2OH-

HS- + 2O2 + OH- → SO42- + H2O

HS- + 2O2 + OH- → SO42- + H2O

该工艺具有如下优点：

This process has the following advantages:

⑴ 高效。该技术操作弹性大，灵活性高，可适应浓度和压力范围广；

⑴ Efficient. This technology has high operational flexibility and adaptability to a wide range of concentrations and pressures;

⑵ 节能。该技术投资少，其需仪器设备少，人力成本低，化学药品少，无须更换，操作成本和维护费用均很低；

⑵ Energy saving. This technology requires less investment, fewer instruments and equipment, lower labor costs, fewer chemicals, no need for replacement, and low operating and maintenance costs;

⑶ 安全。整个生物脱硫系统是封闭运行的，且沼气中的H2S被降到很低浓度，甚至几乎完全被吸收，在吸收器的下游没有游离H2S，不会有中毒和伤亡事故，无环境污染。

⑶ Safety. The entire biological desulfurization system operates in a closed manner, and the H2S in the biogas is reduced to a very low concentration, even almost completely absorbed. There is no free H2S downstream of the absorber, so there will be no poisoning or injury accidents, and no environmental pollution.

唐山绿源生物脱硫工艺流程

Tangshan Green Source Biological Desulfurization Process Flow

另外，酸性铁盐溶液氧化法是近年来发展的新生物脱硫技术之一。其脱除沼气中H2S的原理：酸性条件下，H2S被铁盐溶液吸收，并被Fe3+氧化为S单质，在氧化亚铁硫杆菌的作用下，将Fe2+离子氧化为Fe3+离子，循环使用。反应式为：

In addition, the oxidation method of acidic iron salt solution is one of the new biological desulfurization technologies developed in recent years. The principle of removing H2S from biogas is as follows: under acidic conditions, H2S is absorbed by iron salt solution and oxidized to elemental S by Fe3+. Under the action of ferrous sulfide bacteria, Fe2+ions are oxidized to Fe3+ions and recycled. The reaction equation is:

H2S + Fe2(SO4)3 → S + 2FeSO4 + H2SO4

H2S + Fe2(SO4)3 → S + 2FeSO4 + H2SO4

2FeSO4 + H2SO4 + 1/2O2→ Fe2(SO4)3 + H2O

2FeSO4 + H2SO4 + 1/2O2→ Fe2(SO4)3 + H2O

此法能耗低、投资少、废物排放少，适于沼气脱硫过程。

This method has low energy consumption, low investment, and low waste emissions, making it suitable for biogas desulfurization processes.

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This article provides assistance with biogas desulfurization. For more related content, please click: https://www.hneee.net I hope this article can be helpful to you. Thank you for reading!