Biogas Plants and Utilising Biogas
The biodegradable waste in a landfill creates methane and carbon dioxide. The gases damage the atmosphere and must therefore be collected securely.
This also reduces the smell nuisance. The landfill gas treatment plant measures and analyses the gases, removes condensation water and has at least a torch burner for the disposal of gases. The energy contained in the gas can also be utilised in many different ways.
Utilising Biogas as Heat and Electricity
The methane contained in biogas can be burned with an appropriate burner, thus producing hot water or steam. Up to approximately 90% of the energy contained in the gas can thereby be utilised. By using biogas as gas motor fuel, a generator attached to the motor can utilise up to 35% of the energy contained in the gas as electricity. By recovering the heat from the motor’s cooling water and exhaust fumes, approximately 50% of the energy contained in the gas can also be utilised as heat, i.e. a total of approximately 85%.
We supply biogas boiler plants and gas motor plants as turnkey deliveries.
During pre-treatment, moisture is separated and the largest impurities are filtered from the gas. Different kinds of gas analysis and measurement methods are normally included in the delivery.
Sludge Treatment Plants
Waste treatment creates refinery sludge, which is condensed and dried mechanically or thermally. In certain cases the sludge is decomposed after being condensed. The volume of sludge decreases during decomposition and its drying properties improve.
Decomposition creates biogas, which contains 60-67% of methane, with the rest being carbon dioxide.
The refinery sludge generates approximately 400 dm3 of biogas/1 kg of dry material.
The average heat value of biogas is 6.0 kWh/m3.