SolarThe biogas is a gas with a high energetic content that is generated in the anaerobic decomposition of organic matter.

This process occurs in biodigestors specially design for this purpose or in landfills.


Biogas


Our biogas systems apply different technologies making them adequate to the pool of substrates. To achieve this, our first step is an analysis of the biogas potential of the substrates, which permits the plant dimensioning and the election of the more efficient and convenient equipment available.

Nowadays we count with a diverse project portfolio in different stages of development, from prefeasibility to engineer studies. The total capacity of the project portfolio rises up to 25 MW installed, distributed in the different regions of Chile.


Plantas de Biogás
Plantas de Biogás











What is biogas?

The biogas is a gas with a high energetic content that is generated in the anaerobic decomposition of organic matter. This process occurs in biodigestors specially design for this purpose or in landfills.

The biogas can be used in different ways, like:


Biogas combustion to generate both electrical and thermal energy (cogeneration)
Biogas combustion to generate heat (gas burner, boiler)

The following scheme shows how a typical biogas plant with cogeneration works:
Esquema Planta de Biogás

The residues are taken in a reception tank and homogenized in a mixer before its entrance to the biodigestor or fermentator. In the digester they are continuously agitated keeping a controlled temperature and pressure, determined to optimize the anaerobic digestion of the organic matter to maximize the biogas production and its methane content. Depending on the biogas characteristics, it is captured and treated to eliminate the contents of H2O and H2S. The clean biogas is injected in an internal combustion engine that includes a generator. The electricity output is then injected in the grid. The thermal output is obtained from decoupling the heat originated in the exhaust gases system and the refrigeration system. This thermal energy is used for the temperature control of the digester and for other external industrial processes.

In a landfill, the biogas is naturally produced as a subproduct of the residue treatment and decomposition. To capture this gas, it is necessary the installation of a pipe system that reaches different layers of the landfill. These pipes transport the biogas directly to the gas compression and treatment station, according to the necessity, and then it is injected in an internal combustion engine to generate electrical and thermal energy.