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Life Cycle Inventory & Assessment Report: Separation of Digested Fattening Pig Slurry for Optimal P Concentration, Denmark


The purpose of this Life Cycle Assessment report is to investigate the potential for separating the digested pig manure after the biogas plant in order to optimise the utilisation of the phosphorous content of the manure. By separating, the phosphorous rich solid fraction can be brought to fields far away from the farm with a need for phosphorus, as the fields close to the pig farm areas usually contain abundant amounts of P. The environmental consequences of the separation has been assessed.


Furthermore, the Life Cycle Assessment highlights the environmental impacts along the “manure management chain” for a combination of techniques: Source-segregation of manure from fattening pigs, using the solid part from the source-segregation for biogas production, utilising the biogas for heat and electricity production, separating the digested pig manure after the biogas plant in order to optimize the utilisation of the P content of the solid fraction (by transporting this to agricultural areas which needs P) – compared to “the usual management of raw pig slurry” (i.e. in-house storage, outdoor storage and field application).


This report on 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


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