Biomethane or compressed biomethane gas (CBG) serves multiple purposes as a renewable energy source. It can be used for generating electricity, producing heat, or as a fuel for transportation. Biomethane can be derived from various agricultural materials and leftovers. In particular, using leftovers like manure, organic waste, and straw makes biomethane an eco-friendly energy source that does not compete with food production.

Index Green Gas, as a second-generation fuel, is exclusively made from stillage, a residue from bioethanol production, and straw. It does not involve any negative impacts such as monoculture farming, landscape alteration, or land use changes. Additionally, during biomethane production, high-quality organic fertilizers are created and returned to agriculture.

After undergoing fermentation, the raw biogas is converted into natural gas quality and injected into the existing natural gas grid. Natural gas and biomethane share the same chemical composition, allowing them to be mixed without any technical limitations. Biomethane stands out as the most efficient biofuel, possessing the highest energy density and an octane rating of 130. This leads to a significant reduction in fuel costs, up to 50% compared to gasoline and diesel.

Index Green Gas is the most environmentally friendly biofuel available, achieving a 90% reduction in CO2 emissions.

By utilizing four straw bales (equivalent to two tons), we can produce enough biomethane to power a mid-range CNG vehicle for an entire year, covering an annual mileage of 11,500 kilometers, according to DIW statistics.

Production Of Index Green Gas.

Index Green Gas, a renewable energy source, is generated in a revolutionary biorefinery. This gas is exclusively derived from agricultural residues like stillage, a waste product from bioethanol production, and straw, without using any food materials.

To produce index green gas, the raw materials are introduced into fermenters that have a capacity of around 8,000 – 10,000 m3. These fermenters contain bacteria, and the biomass remains there for approximately 30 – 150 days. During this fermentation process, raw biogas is produced, which consists mainly of methane (around 60%). The remaining components include carbon dioxide, sulfur, and inorganic elements. To ensure purity, these elements are separated and removed using a desulfurization and CO2 separation system.

After the purification process, the biomethane is 99% pure and can be supplied directly to the natural gas network. Additionally, our biorefinery also produces

valuable by-products such as ammonium sulfate solution (ASL), straw humus, phosphate, and potassium, which can be used as biofertilizers.

Located in Akamkpa, Cross River State, our facility specializes in producing biomethane from stillage. We at Index Green Energy Company, are proud to offer index green gas at various CNG stations across Nigeria, most of which are operated by oil marketing companies. Moreover, we have plans to provide index green gas to private companies for power generation.