在规模化养殖场，粪污处理一直是环保压力的焦点。但换个角度看，这些“废弃物”其实是放错地方的资源。沼气发电机组，正是将养殖粪污转化为清洁电力的关键装备。

In large-scale breeding farms, manure treatment has always been a focus of environmental pressure. But looking at it from a different perspective, these 'waste' are actually resources that have been misplaced. The biogas generator set is a key equipment for converting livestock manure into clean electricity.

沼气发电的基本原理已相当成熟。 畜禽粪便等有机废弃物经厌氧发酵产生沼气，沼气经脱硫、脱水等净化处理后送入燃气发动机，与空气混合燃烧推动活塞做功，带动发电机产生电能。作为发电机组燃料的沼气中甲烷含量建议高于50%，在进入发动机前需经脱硫等净化处理。

The basic principle of biogas power generation is quite mature. Organic waste such as livestock and poultry manure is anaerobically fermented to produce biogas. After purification treatment such as desulfurization and dehydration, the biogas is sent to a gas engine and mixed with air to burn and drive the piston to do work, driving the generator to generate electricity. The methane content in biogas used as fuel for generator sets must be higher than 50%, and it needs to undergo purification treatment such as desulfurization before entering the engine.

单燃料与双燃料是两条主要技术路线。 单燃料发电机组适用于沼气产量大的场合，可连续稳定运行。双燃料机组则可灵活切换沼气与柴油，当沼气产量波动时自动补充柴油，保证发电连续性。对于养殖场而言，如果沼气产量受季节温度影响较大，双燃料机组的适应性更强。

Single fuel and dual fuel are two main technological routes. Single fuel generator sets are suitable for situations with high biogas production and can operate continuously and stably. The dual fuel unit can flexibly switch between biogas and diesel, and automatically replenish diesel when biogas production fluctuates, ensuring the continuity of power generation. For breeding farms, if the biogas production is greatly affected by seasonal temperature, the adaptability of dual fuel units is stronger.

余热回收是提升经济效益的关键。 沼气发电过程中产生的冷却水余热和废气余热，可通过热回收装置进行梯级利用——用于加热发酵池、提供场区热水或冬季供暖。通过热电联产模式，综合热效率可达80%左右，远高于单纯发电的效率。

Waste heat recovery is the key to improving economic efficiency. The cooling water waste heat and waste gas waste heat generated during biogas power generation can be utilized in a cascade manner through heat recovery devices - for heating fermentation tanks, providing hot water for the site, or winter heating. Through the cogeneration mode, the comprehensive thermal efficiency can reach around 80%, far higher than the efficiency of pure power generation.

从政策层面看，国家持续推动沼气产业发展。中国沼气发电行业累计装机容量从2016年的35万千瓦上涨至2023年的149万千瓦，发电量约为36亿千瓦时。对于养殖企业而言，配置沼气发电机组不仅能解决粪污处理难题，还能降低外购电成本，实现环保与效益的双赢。

From a policy perspective, the country continues to promote the development of the biogas industry. The cumulative installed capacity of China's biogas power generation industry has increased from 350000 kilowatts in 2016 to 1.49 million kilowatts in 2023, generating approximately 3.6 billion kilowatt hours of electricity. For aquaculture enterprises, configuring biogas generators can not only solve the problem of manure treatment, but also reduce the cost of purchasing electricity, achieving a win-win situation of environmental protection and benefits.

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