在沼气、焦炉煤气、天然气的净化之路上，生物脱硫与沼气脱硫并非两条平行的技术路线，而是一对“黄金搭档”——它们各司其职、协同作战，共同完成了从“粗气”到“净气”的蜕变。

On the road of purifying biogas, coke oven gas, and natural gas, biological desulfurization and biogas desulfurization are not two parallel technological routes, but a pair of "golden partners" - they each perform their own duties and work together to complete the transformation from "crude gas" to "clean gas".

“脱硫”与“提纯”：两个层级，一个目标。

"Desulfurization" and "purification": two levels, one goal.

要理解二者的关系，首先需要厘清沼气脱硫与沼气净化提纯的区别。沼气脱硫是一个特定的预处理步骤，专注于去除沼气中的硫化氢（H?S）。而沼气净化提纯是一个更广泛、更的处理过程，目标是去除沼气中除了甲烷（CH?）以外的几乎所有杂质，非常终得到高纯度、高价值的生物甲烷。简单来说，脱硫是净化提纯不可或缺的第一步，但净化提纯的目标和要求远高于单纯的脱硫。

To understand the relationship between the two, it is first necessaryto clarify the difference between biogas desulfurization and biogas purification and purification. Biogas desulfurization is a specific pretreatment step that focuses on removing hydrogen sulfide (H2S) from biogas. And biogas purification is a broader and more comprehensive treatment process, aiming to remove almost all impurities in biogas except methane (CH?), and ultimately obtain high-purity and high-value biogas. Simply put, desulfurization is an indispensable first step in purification and purification, but the goals and requirements of purification and purification are far higher than simple desulfurization.

在实际工程中，脱硫与提纯往往形成“前后接力”的工艺链。以维尔利集团在山东日照的生物天然气代表项目为例，该项目收集生活垃圾渗滤液处理过程中产生的沼气，采用“湿法脱硫+精脱硫+变压吸附提纯”的完整工艺路线，产出高品质生物天然气约203万立方米/年。沼气首先经过脱硫环节去除H?S，保护后续提纯设备不被腐蚀；随后进入变压吸附（PSA）系统脱除CO?，将甲烷浓度提升至95%以上。这种“先脱硫、后提纯”的工艺组合，正是生物脱硫与沼气提纯“双剑合璧”的典型范例。

In practical engineering, desulfurization and purification often form a "relay" process chain. Taking the benchmark project of Weili Group's bio natural gas in Rizhao, Shandong as an example, the project collects biogas generated during the treatment of domestic waste leachate, adopts a complete process route of "wet desulfurization+fine desulfurization+pressure swing adsorption purification", and produces high-quality bio natural gas of about 2.03 million cubic meters per year. Biogas first undergoes desulfurization to remove H2S, protecting subsequent purification equipment from corrosion; Subsequently, it enters the pressure swing adsorption (PSA) system to remove CO and increase the methane concentration to over 95%. This process combination of "desulfurization first, purification later" is a typical example of the "dual sword combination" of biological desulfurization and biogas purification.

生物脱硫：沼气净化的“第一道防线”。

Biological desulfurization: the "first line of defense" for biogas purification.

生物脱硫作为第三代脱硫技术，在沼气净化中扮演着越来越重要的角色。其工艺通常包含洗涤塔吸收、生物反应器转化和硫沉淀分离三个核心步骤，硫化氢去除率高达99.5%，产物硫磺可作化肥原料。以扬州市某厨余垃圾资源化利用项目为例，其沼气生物脱硫实践为国内同类型项目调试提供了宝贵参考。在大型厌氧消化项目中，水洗和生物脱硫常常被联合起来用以去除硫化氢。生物脱硫利用脱硫微生物催化沼气中的硫化氢，在控制氧气浓度的条件下将其转化为硫酸或单质硫，具有低运行成本、环境友好等特点。

As a third-generation desulfurization technology, biological desulfurization plays an increasingly important role in biogas purification. The process usually includes three core steps: scrubbing tower absorption, bioreactor conversion, and sulfur precipitation separation. The removal rate of hydrogen sulfide is as high as 99.5%, and the product sulfur can be used as fertilizer raw material. Taking a kitchen waste resource utilization project in Yangzhou City as an example, its biogas biological desulfurization practice provides valuable reference for the commissioning of similar projects in China. In large-scale anaerobic digestion projects, water washing and biological desulfurization are often combined to remove hydrogen sulfide. Biological desulfurization utilizes desulfurization microorganisms to catalyze hydrogen sulfide in biogas, converting it into sulfuric acid or elemental sulfur under controlled oxygen concentration conditions. It has the characteristics of low operating costs and environmental friendliness.

提纯技术：从“粗气”到“绿气”的非常后一跃。

Purification technology: the final leap from "coarse gas" to "green gas".

在脱硫之后，沼气提纯技术完成从“粗气”到“绿气”的非常后一跃。目前主流的提纯方法包括物理吸收法（水洗法）、化学吸收法（胺洗法）、变压吸附法（PSA）、膜分离法以及新兴的低温分离法等。水洗法利用CO?在水中溶解度高于CH?的特性进行洗涤分离，成本低、操作简单。PSA变压吸附在高压下将CO?吸附、减压后再释放，无需水或化学品。膜分离利用CH?和CO?通过膜的扩散速率不同进行分离，模块化强、适合分布式项目。化学洗涤（MEA）采用胺类溶液吸收CO?后再生，CO?去除率高、气体纯度好。

After desulfurization, biogas purification technology completes the final leap from "crude gas" to "green gas". The current mainstream purification methods include physical absorption (water washing), chemical absorption (amine washing), pressure swing adsorption (PSA), membrane separation, and emerging low-temperature separation methods. The water washing method utilizes the characteristic of CO? Having a higher solubility in water than CH? For washing and separation, with low cost and simple operation. PSA pressure swing adsorption adsorbs CO? Under high pressure, reduces pressure, and then releases it without the need for water or chemicals. Membrane separation utilizes CH? And CO? With different diffusion rates through the membrane for separation, making it highly modular and suitable for distributed projects. Chemical cleaning (MEA) uses amine solution to absorb CO? And regenerate it, with high CO? Removal rate and good gas purity.

从“粗气”到“净气”，生物脱硫与沼气提纯如同并驾齐驱的双轮。生物脱硫负责“除害”——将硫化氢这一腐蚀性、有毒性的气体转化为无害的单质硫；提纯技术负责“提质”——将甲烷浓度从50%-65%提升至95%以上，使沼气真正具备与化石天然气竞争的品质。两者缺一不可、相辅相成，共同构建了从废弃物到绿色能源的完整技术链条。

From "crude gas" to "clean gas", biological desulfurization and biogas purification are like two wheels running parallel. Biological desulfurization is responsible for "pest control" - converting hydrogen sulfide, a corrosive and toxic gas, into harmless elemental sulfur; Purification technology is responsible for "quality improvement" - increasing methane concentration from 50% -65% to over 95%, making biogas truly competitive with fossil natural gas. Both are indispensable and complementary, jointly building a complete technological chain from waste to green energy.

本文由沼气提纯友情奉献.更多有关的知识请点击:https://www.hneee.net真诚的态度.为您提供为的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

This article is a friendly contribution from biogas purification For more information, please click: https://www.hneee.net Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.