沼气发电机组的排放标准因地区、机组类型和应用场景不同而有所差异，以下是主要的排放标准及适用情况：

　　The emission standards for biogas generators vary depending on the region, unit type, and application scenario. The following are the main emission standards and their applicable situations:

　　1.《大气污染物综合排放标准》（GB 16297-1996）

　　1. Comprehensive Emission Standards for Air Pollutants (GB 16297-1996)

　　适用于没有行业特定标准的废气排放源，对二氧化硫（SO?）、氮氧化物（NOx）、颗粒物等污染物的排放浓度和速率作出规定。

　　Applicable to exhaust gas emission sources without industry-specific standards, regulations are made on the emission concentration and rate of pollutants such as sulfur dioxide (SO?), nitrogen oxides (NOx), particulate matter, etc.

　　例如，SO?排放浓度限值为：新污染源一级标准960mg/m?，二级标准500mg/m?；现有污染源一级标准1200mg/m?，二级标准700mg/m?。

　　For example, the emission concentration limit for SO is 960mg/m according to the first level standard for new pollution sources? Secondary standard 500mg/m?; The current primary standard for pollution sources is 1200mg/m? The second level standard is 700mg/m?.

　　2.《车用压燃式、气体燃料点燃式发动机与汽车排气污染物排放限值及测量方法》（GB 17691-2005）

　　2. "Limits and Measurement Methods for Exhaust Pollutants from Compression Ignition and Gas Fuel Ignition Engines for Vehicles" (GB 17691-2005)

　　若沼气发电机组采用类似汽车发动机的技术路线，可参照该标准的中国Ⅲ、Ⅳ、Ⅴ阶段排放限值。

　　If the biogas generator set adopts a technology route similar to that of a car engine, the emission limits for stages III, IV, and V in China can be referred to in this standard.

　　例如，NOx排放限值在Ⅳ阶段为2.0g/kWh，Ⅴ阶段为1.0g/kWh（具体限值因发动机类型和功率有所不同）。

　　For example, the NOx emission limit is 2.0g/kWh in Stage IV and 1.0g/kWh in Stage V (specific limits vary depending on engine type and power).

　　3.《大功率沼气发电机组》（GB/T 29488-2013）

　　3. High power biogas generator sets (GB/T 29488-2013)

　　适用于额定功率不小于250kW、以沼气为主要燃料的往复式内燃机驱动的交流工频发电机组。

　　Suitable for AC power frequency generator sets driven by reciprocating internal combustion engines with a rated power of not less than 250 kW and mainly fueled by biogas.

　　规定机组在额定工况时NOx排放限值为3.48g/kWh，对SO?排放未作具体规定。

　　The NOx emission limit for the unit under rated operating conditions is set at 3.48g/kWh, but there is no specific regulation on SO? Emissions.

　　4.地方标准

　　4. Local standards

　　部分地区制定了区域性大气污染物综合排放标准，如山东省《区域性大气污染物综合排放标准》（DB37/2376-2019），对NOx、SO?、颗粒物等污染物设定更严格的排放限值，具体数值因地区和污染控制要求而异。需注意，不同地区的环保部门可能根据当地环境质量状况和管理需求，要求沼气发电项目执行更严格的排放标准或补充特定污染物的监测要求。建议项目单位在建设前咨询当地生态环境部门，明确适用的排放标准和监管要求。

　　Some regions have established regional comprehensive emission standards for air pollutants, such as the Shandong Province's "Regional Comprehensive Emission Standards for Air Pollutants" (DB37/2376-2019), which address NOx and SO emissions? Strict emission limits are set for pollutants such as particulate matter, and the specific values vary depending on the region and pollution control requirements. It should be noted that environmental protection departments in different regions may require biogas power generation projects to implement stricter emission standards or supplement monitoring requirements for specific pollutants based on local environmental quality conditions and management needs. It is recommended that the project unit consult the local ecological environment department before construction to clarify the applicable emission standards and regulatory requirements.

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