Biogas Treatment

Biogas is a natural gas produced from the decomposition of organic matters in nature. When microorganisms are in anaerobic conditions, this stimulates the decomposing process. This leads to the complement of biogases, consisting of various gases, of which 50%-70% are Methane, 30%-50% is carbon dioxide, and the other complements are mixtures of Oxygen, Hydrogen sulfide, Nitrogen, and water particles.


The industrial biogas production process.

The essential component in this process is organic matter, which can be collected from wastewater and industrial waste from agricultural production, or the waste from surrounding community, farms, and cattle. The process starts with bringing the wastewater to the treatment sites. Then the decomposition process is done, with or without using any ammonia, to decompose the organic matter for biogas. Then, after the decomposing process in done in a biogas plant, the leftover organic sediment possesses the same attributes as organic fertilizer, which can be used for farming and soil quality enhancement. This does not produce any carbon monoxide. This process can repurpose valuable resources of fertilizer from agricultural production that produced a lot of wastewater with foul odors, with anaerobic conditions. This process is one of the alternative processes that is environmentally friendly, in line with current environmental trends, while also creating profit from the productions and improving the business model. The main factor of the quality of the biogas treatment process is the amount of wastewater and waste matter that is used in the biogas treatment process.


Biogas treatment is gas that is received from biogas treatment processes, which needs to be treated per the different functions as follows:


  • Decrease of fuel in the gas pipeline : normally biogas is a gas that has a high moisture rate, and nearly meets the saturation point. This moisture can be extracted from the ground gas pipeline to control the temperature at the minimum level. Therefore, the moisture will turn into droplets, and transfer to the water trap set to prevent water from becoming obstacles of gas transfer.

  • Decreasing the amount of carbon dioxide : this specific process is required to process the biogas treatment which has a too low methane complement. This affects the ignition point, making it more difficult to ignite. Decreased carbon dioxide will help enhance the quality of biogas, which makes it similar to natural gases.

  • Decreasing of Hydrogen sulfide (H2S) : hydrogen sulfide is one of the toxic contamination gases in biogas, which can create chemical reactions upon contacting water or vapor changing its attributes into Sulfuric acid (H2SO4). This acid is the main cause of acid rain and acid vapor, which corrodes iron and other tools. Decreasing Hydrogen sulfide (H2S) is beneficial for equipment and machine performance in Anaerobic Digesters, and is an environmentally friendly method of biogas treatment.


The benefit of Biogas


  • Biogas is fuel for the heat energy in farms and agricultural production, especially for the heat exchangers in many machines.

  • Biogas can be used to create mechanical energy/ electricity for different industrial sites.

  • It can be used as Bio energy for heat energy from Cogeneration Systems


1 cubic meter of biogas can be used as an alternative energy resource compared to the same amount as 0.46 grams of LPG gas, 0.60 liters of diesel oil, 0.55 liter for fuel oil, and the equivalent of 1.20 Kilowatt/hour.


Biogas Filtration

Raw Biogas from the anaerobic digester and landfill often contain foam particles, or minuscule solid particles, grease, and other contaminants. It is crucial to treat the biogas with biogas filtration before it reaches the downstream process or gas pipelines. If the user does not implement the biogas filtration to clean the contaminants, it might disrupt the entire process and the downstream system.


The performance of fuel depends on the substantial decrease of moisture. The raw biogas has a large amount of both water and other contaminants which affects machine performance, and increases the risk of damage on equipment, engines, and pipelines. Filtering the fuel will improve the performance of the machine in industrial sites and decrease the cost of maintenance. This is because the cleaned biogas from biogas plants will not corrode the engine. The dry biogas is produced by the water-cooled, cooling process at 5 degree in heat exchangers, then by separating water from the gas which is required for the biogas treatment process.


Domnick Hunter-RL (Thailand) is the distributor of Biogas filtration of Parker Domnick Hunter, which is the essential equipment. Biogas filtration is specially produced to prevent any effect of contaminated gases, and can be used even with the extremely low-pressure gas. The clean gas is guaranteed to decrease the cost of the factory, and also assure safe operations and production line while being environmentally friendly. Also, the production of biogas in anaerobic conditions or landfill sites is required to be stainless, specifically designed for high durability of corrosion.


Domnick Hunter-RL (Thailand) has a team of specialized engineers ready to provide you the support and suggestion for biogas treatment process installation for various type of industries.


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