Agricultural and municipal waste is increasingly being used as a resource for energy generation, with waste-to-energy technologies providing ways to recover useful energy while reducing the volume of material sent to landfills, The Economic Times reported.
At Vegpro’s facility in Naivasha, Kenya, 45,000 tonnes of vegetable waste were converted into biogas. The methane produced from the biogas was then used to generate electricity, which powered the facility’s farm operations on a daily basis.
The process provides an alternative use for organic agricultural waste that would otherwise require disposal or other forms of waste management. At the Naivasha facility, vegetable waste is processed into biogas, with the resulting methane serving as a fuel for electricity generation.
The electricity generated from methane is used for the farm’s operations, linking agricultural waste management with energy production.
Other waste-to-energy technologies can also recover energy from different waste streams. Incineration, for example, can be used to generate electricity by driving a turbine. The information provided indicates that around 500 kWh of electricity can potentially be generated from one tonne of municipal waste.
Incineration can also substantially reduce the volume of waste requiring landfill disposal, with waste volumes potentially falling by 95-96%. The extent of reduction, however, depends on the composition of the waste. Higher reductions are associated with waste streams containing significant quantities of packaging material, paper, cardboard, plastics and horticultural waste.
Recovering energy from waste before disposal is considered preferable to landfilling when appropriate pollution-control measures are in place and the associated costs are properly addressed.
Gasification and pyrolysis provide additional routes for converting suitable waste materials into useful energy products. Biomass, wood and plastic waste can be processed using these technologies to produce a gas mixture containing carbon monoxide and hydrogen.
The different technologies demonstrate that waste streams can be processed according to their composition and characteristics. Organic agricultural waste can be converted into biogas, while incineration, gasification and pyrolysis offer other routes for energy recovery from suitable materials.
The Vegpro facility in Naivasha provides an example of how agricultural waste can be integrated into an energy-generation system. By converting 45,000 tonnes of vegetable waste into biogas and using methane-generated electricity for daily farm operations, the facility has linked agricultural waste management with on-site energy production.
