Life Cycle Inventory & Assessment Report: Combustion of Horse Manure with Heat Utilisation, Sweden
In the Horse Manure Combustion system, horse manure is combusted in a small scale furnace with heat generation. Combustion is an alternative treatment of horse manure for areas with no available land for spreading. Instead of recycling of nutrients in horse manure the energy is utilised and ashes are disposed through landfilling.
The study showed that combustion and energy used for heating increases environmental impacts such as global warming, acidification and eutrophication compared to spreading horse manure on arable land as organic fertiliser. In the case of acidification and eutrophication the increased impact is caused by emissions of sulphur oxides and nitrogen oxides emitted with exhaust gases. The environmental impact of global warming depends on how carbon dioxide from combustion is valued. If assuming that the carbon dioxide emissions from combustion is included in global warming , then the environmental impact is high as almost all carbon is emitted as carbon dioxide. If assuming that global warming contribution from carbon dioxide at combustion is zero (the carbon is biogenic and assimilation of carbon through photosynthesis in new biomass is equal) the contribution to global warming impact from combustion is low compared to utilising horse manure as fertiliser.
This report on small scale combustion of horse manure was prepared as part of Work Package 5 on Assessing Sustainability of Manure Technology Chains in the project Baltic Manure.
Click here to read the report