Nitrogen Carbon monoxide Oxygen Hydrogen sulphide
N2 CO O2 H2S
0.5 0.1 0.1 0.1
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Table F Biogas yield per tonne substrate for different types of bio waste types and assumptions for calculations of the biogas production.
Bio waste type Residual fats Rapeseed cake Flotated fats
Biogas production (m3/ tonne substrate) 600 550 400
Food waste Corn silage Grass silage (first cutting) Corn silage (pasty) Brewers' grain Bio waste bio‐bin
220 202 195 170 129 120
Green waste Grass (first cutting) Sugar beet silage Vinasse (sugar industry leftover) Beets Fooder Beets Whey Poultry manure Swine manure
110 102 90 80 75 70 55 50 36
Assumptions Organic waste from households and offices is similar to food waste. Cyclus waste is 50/50 mix of food waste and green waste Crop residue farms and helophyte filter cuttings are similar to green waste Sewage sludge is similar to cattle manure
Cattle manure 25 It was assumed that all wastewater produced by the households and companies would go to the biogas plant via the sewer.
For the fertiliser production, it was assumed that the organic waste contains on average 0.45wt% Nitrogen (N)11, and ten times less phosphorus (P), i.e. 0.045wt%. Assumptions and data for the spatial implications of the biogas plant can be found below. 10
Source: ‘Why mix feedstocks?’, accessed via www.michigan.gov/documents/mda/AD_WhyMixFeedstocks_221951_7.pdf 11 Source: Based on nitrogen content in biomass from Bastiaans, R.J.M., ‘Energy from biomass’, Reader for the course SET 3041 Energy from Biomass at the TU Delft, Eindhoven, 2005
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