生物法脫硫技術(shù)是人們由于傳統(tǒng)物理法和化學(xué)法有其自身難以克服的缺點而發(fā)展起出來的一種新脫硫技術(shù)，此法具有誘人的工業(yè)應(yīng)用前景，但其起步晚，技術(shù)及工藝還很不成熟。

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.

人們對生物法脫硫研究始于19世紀(jì)50年代，到80年代在一些發(fā)達(dá)國家得到很大發(fā)展，像德國。傳統(tǒng)脫除H2S的物理法和化學(xué)法雖各有優(yōu)點，但存在著運行費用高，工藝復(fù)雜，產(chǎn)生二次污染和能耗大等缺點；相比之下，生物法脫除H2S具有能耗低、操作方便、無二次污染，投資少等優(yōu)點。

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.

反應(yīng)式為：

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

該工藝具有如下優(yōu)點：

This process has the following advantages:

⑴ 。該技術(shù)操作彈性大，靈活性高，可適應(yīng)濃度和壓力范圍廣；

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

⑵ 節(jié)能。該技術(shù)投資少，其需儀器設(shè)備少，人力成本低，化學(xué)藥品少，無須更換，操作成本和維護(hù)費用均很低；

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。整個生物脫硫系統(tǒng)是封閉運行的，且沼氣中的H2S被降到很低濃度，甚至幾乎完全被吸收，在吸收器的下游沒有游離H2S，不會有中毒和傷亡事故，無環(huán)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.

唐山綠源生物脫硫工藝流程

Tangshan Green Source Biological Desulfurization Process Flow

另外，酸性鐵鹽溶液氧化法是近年來發(fā)展的新生物脫硫技術(shù)之一。其脫除沼氣中H2S的原理：酸性條件下，H2S被鐵鹽溶液吸收，并被Fe3+氧化為S單質(zhì)，在氧化亞鐵硫桿菌的作用下，將Fe2+離子氧化為Fe3+離子，循環(huán)使用。反應(yīng)式為：

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、投資少、廢物排放少，適于沼氣脫硫過程。

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: http://szzcsj.com I hope this article can be helpful to you. Thank you for reading!