This paper investigates how experiences from the deployment of Solrød biogas plant in Denmark - a large scale centralized biogas plant - can assist future biogas technologies in achieving Circular Economic benefits. Departing from a theoretical understanding of Circular Economy provided by Ellen MacArthur Foundation, the paper analysis three areas being; 1) Biogas production, 2) Nitrogen, Phosphor & GHG, 3) Re-cycle/cascade materials, and consequently elaborate on the environmental benefits obtained, as far as CO2 emission reductions from biogas production substituting fossil fuels, improved water quality and hence reduced Green House Gas (GHG) emissions due to lower nitrogen spills, and re-cycling of nutrient on farmland recovering finite resources and improving crop yield. Economic spin-off effects are presented, as far as new jobs created in the local community. Learning from Solrød Biogas, this paper further proposes to include the following activities when planning for future biogas plants: Waste-stream identification and coupling in the local community; Measuring the value of digestate as fertilizer; Short distance to farmers delivering manure; and Plant design according to local energy market. Finally, the paper suggests how to qualify the Circular Economic concept based on the finding from Solrød biogas plant. It is here concluded, that emphasis should be on cascading energy from the biogas production by means of Combined Heat and Power (CHP), district heating or process heat to industry. Besides this, cascades in the manufacturing chain must also be intensified, allowing a more efficient materials and energy utilization and re-cycling in this part of the product chain. This will consequently reduce the total quantity of waste being generated by manufacturing industries, and thus benefit re-cycling strategies that only capture, and seek to re-use, a limited fraction of the waste being generated from industry.
|Publikationsdato||4 aug. 2016|
|Status||Udgivet - 4 aug. 2016|
|Begivenhed||The 6th KKU International Conference 2016: Engineering and Technology for Better Living - Pullman Khon Kaen Raja Orchid Hotel, Khon Kaen, Thailand|
Varighed: 3 aug. 2016 → 5 aug. 2016
|Konference||The 6th KKU International Conference 2016|
|Lokation||Pullman Khon Kaen Raja Orchid Hotel|
|Periode||03/08/2016 → 05/08/2016|