Landfill Gas Collection And Use
The gas generated by microorganism by chemical reaction in landfill is referred as landfill gas. Most of the landfills are municipal solid waste landfill that produces methane gas. Production of landfill gas is influenced by the composition of the waste and geometry of landfill. This in turn influences the growth of microorganisms and chemical composition of waste. The landfill gas generates is heterogeneous in nature. It makes comfortable physical conditions and growth of biological ecosystems within landfill sites. As the landfill gas production is continuous, there is increase in pressure inside the landfill which releases the gas in to earth’s atmosphere. The landfill gas collection reduces the material required for landfill especially in case of bioreactors. The release of other gases like methane is more beneficial. The stabilization of greenhouse gas is plausible. Collection of landfill gas with bioreactors and landfill is widely accepted.
Types of landfill gas collection:
Following are two main types of landfill gas collection.
The landfill gas produces the intermediate compounds such as nitrogen, carbon dioxide, oxygen, hydrogen sulphide, methane and water. The main energy from landfill gas is methane gas as biogas, thermal energy and electricity. The byproducts of landfill are biofertilizers, carbon dioxide as greenhouse gas.
Landfill Gas Utilization:
The degradation of solid waste by microorganisms results in release of gas. The gas quantity is dependent on the waste compaction, temperature, oxygen, time and physical geometry. The landfill gas collecting systems is by extraction of well which depends on the size of the landfill. The horizontal trenches extract the solid waste rather than vertical wells. However both are effective in its operation. Landfill gas is used for boiler, process heater, infrared heaters, greenhouses, artisan studios, electricity generation and dryer.