RDF
Refuse-Derived Fuel is a type of fuel produced from processed waste. The process involves extracting valuable materials, such as metals and glass, followed by drying and fractionating the remaining residues. The obtained RDF can be used for energy production instead of traditional fuels like coal or natural gas. This helps reduce waste volume, promotes recycling, and contributes to energy production with lower environmental impact.
Well drilling
The advantage of using biogas digesters to process the organic fraction of MSW is that gas continues to be produced even after 30-40 years. As long as new waste comes in, biogas remains available. In contrast, landfills run out of gas after 3-7 years. Nevertheless, due to lower costs, the landfill gas extraction method also remains in demand.
The structure of landfills designed for gas collection and extraction is divided into two types: organized and unorganized.
Landfills produce similar biogas and the same anaerobic fermentation processes occur as in biogas plants. The difference is that in biogas digesters these processes are accelerated, whereas in landfills they are slowed down.
1. Organized landfill
When placed in an organized landfill, perforated pipes are built into the body of the site for efficient collection of biogas. The landfill itself is waterproofed on all sides, including the top. This approach prevents biogas leakage from the landfill, maximizing the gas yield. Organized landfills have significant depths, often as deep as 80-100 meters. The waste management process notes which materials go into different sections of the landfill and when. Biogas from such a landfill can be recovered within 8-12 years.
In organized landfills, vertical pipes may be laid when the site is installed or drilled after the site is filled.
2. Unorganized landfill
In unorganized landfills, waste is simply accumulated without the use of horizontal pipes and, often, without waterproofing. The depth of such landfills varies from 20 to 40 meters and biogas production takes about 3-5 years.
In the case of unorganized landfills, boreholes are drilled and vertical pipes are installed. The top of each well is concreted and the distance between wells is 15-25 meters. The area of each well shall cover the space between neighboring wells.
The biogas is extracted from the vertical pipes and directed to gas collectors. The gas then undergoes procedures of dehydration, cleaning from impurities, compression and goes to a generator or flare.
Characteristics of landfill biogas include low methane content (30-45%) and high levels of impurities such as hydrogen sulfide in the range of 3000-5000 ppm. This requires effective filtration of the gas.
№1
A full range of services from one company - from initial assessment to commissioning.
№2
Non-standard and unique solutions, applying the experience of world leaders.
№3
We pay attention to the optimal balance of capital and operating costs.
№4
Guaranteed results in achieving the quality indicators required by your company.
