Biogas generator sets play a significant role in the field of renewable energy utilization. In addition to reducing greenhouse gas emissions by replacing fossil fuels, biogas generation and power production can also have other environmental advantages.
Biogas generator sets mainly rely on the combustion of biogas to generate mechanical energy and then convert it into electrical energy. Biogas, which is typically produced from the anaerobic digestion of organic matter such as agricultural waste, sewage sludge, and livestock manure, contains methane as the main combustible component. When biogas enters the combustion chamber of the generator set, it is mixed with air and ignited under controlled conditions. The resulting explosion generates high - pressure gas that acts on the piston in the engine, driving the crankshaft to rotate and thereby starting the power generation process.
The engine is the core component. It is designed to be able to handle the specific characteristics of biogas combustion. Special attention is paid to the design of the combustion chamber, intake system, and exhaust system to ensure efficient and stable operation. Engines used in biogas generator sets may include spark - ignition engines or dual - fuel engines. In the case of dual - fuel engines, they can run on a combination of biogas and a small amount of diesel or other pilot fuels to improve combustion stability.
The generator is coupled with the engine to convert the mechanical energy of the engine's rotation into electrical energy. It is usually a synchronous generator or an asynchronous generator. The generator's design ensures that the output voltage and frequency meet the requirements of the power grid or the specific electrical load.
Before entering the generator set, biogas needs to be pretreated. This system may include desulfurization equipment to remove hydrogen sulfide from biogas, as hydrogen sulfide can cause corrosion in the engine and other components. Moisture removal and filtration processes are also carried out to ensure the purity and quality of the biogas, improving the combustion efficiency and protecting the generator set.
The control system is responsible for monitoring and regulating the operation of the biogas generator set. It can control the speed of the engine, the air - to - fuel ratio, and other parameters to ensure stable power generation. It also has functions such as automatic start - stop, fault diagnosis, and protection against abnormal operating conditions, ensuring the safe and reliable operation of the entire generator set.
2.5 Double - membrane Gas Holder
The double - membrane gas holder is an important storage device for biogas. It consists of an inner membrane and an outer membrane. The inner membrane directly contacts the biogas and is made of materials with excellent gas - tightness to prevent biogas leakage. The outer membrane provides additional protection and structural support. Between the two membranes, there is usually an air - filled space. The pressure of the air in this space can be adjusted to maintain the stability of the gas holder and to ensure that the biogas is stored under proper pressure conditions. The double - membrane design not only ensures the safe storage of biogas but also allows for visual inspection of the gas storage status as any damage or deformation of the membranes can be easily detected.
2.6 Biogas storage bags

which also known as biogas storage balloons or flexible gas holders, are specifically designed containers for storing biogas. Biogas is a mixture of gases produced through the anaerobic digestion of organic matter such as agricultural waste, sewage sludge, and food waste. The primary function of the storage bag is to provide a temporary reservoir for biogas, allowing for a more consistent supply of gas to downstream applications such as biogas - powered generators, heating systems, or cooking appliances
They make use of biogas, which is a renewable energy source. By converting biogas into electricity, it reduces the dependence on fossil fuels, contributing to the reduction of greenhouse gas emissions and environmental protection.
The process of generating biogas often involves the treatment of organic waste. This not only helps in solving the problem of waste disposal but also turns waste into a valuable resource, killing two birds with one stone.
For many agricultural and industrial enterprises, using biogas generator sets can reduce energy costs. In addition, in some cases, excess electricity generated can be sold to the grid, bringing additional income.
Biogas generator sets are widely used in various fields. In rural areas, they can be used in farms to handle livestock manure and provide electricity for daily use and agricultural production. In sewage treatment plants, biogas generated from sewage sludge digestion can be used to power the plant's own operation. Industrial parks that generate a large amount of organic waste can also install biogas generator sets to achieve energy self - sufficiency and waste reduction.
In conclusion, biogas generator sets are an excellent solution for renewable energy generation and waste management, with broad application prospects and significant environmental and economic benefits.