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Food name Side stream Component group Component Value Unit Description Reference
Food, unspecified Food leftovers Inorganics Tungsten 0.26 mg/l Source segregated domestic food waste in Luton, UK Valorgas D4.5: Final recommendations for trace element and nutrient supplementation for stable operation of digesters receiving food waste
Nuts, unspecified Nut hulls Inorganics Titanium dioxide (TiO2) 0.08 % ash Almond, shells (hulls) ECN Phyllis 2
Rice Rice husk Inorganics Titanium dioxide (TiO2) 8 ppm Ash A study on the consecutive preparation of silica powders and active carbon the rice husk ash
Coconut Coconut shell Inorganics Titanium dioxide (TiO2) 0.01 % ash ECN Phyllis 2
Courgette Courgette plant Inorganics Titanium dioxide (TiO2) 0.03 % ash ECN Phyllis 2
Tomatoes Tomato plant Inorganics Titanium dioxide (TiO2) 0.26 % ash C,H and N determined according to UNE-CEN/TS 15104:2008 EX. S according to ASTM D4239-08, Cl according to ASTM E776-87. Erroneous data for ash metal content corrected after consultation with authors. ECN Phyllis 2
Olive Olive cake Inorganics Titanium dioxide (TiO2) 0.17 % ash ECN Phyllis 2
Nuts, unspecified Nut shells Inorganics Titanium dioxide (TiO2) 0.2 % ash Pistachio. California residues collected from producers for MFC trials ECN Phyllis 2
Nuts, unspecified Nut hulls Inorganics Titanium dioxide (TiO2) 0.09 % ash Almond, shells (hulls). Ash type: 600 Degree Celcius ECN Phyllis 2
Rice Rice husk Inorganics Titanium dioxide (TiO2) 0 % Silica powder A study on the consecutive preparation of silica powders and active carbon the rice husk ash