Table 7 AGRI knowledge domain. Prevalence of recovered product per source stream across papers focusing on reuse in agriculture. “NA” stands for not applicable –a combination of product and source stream that is not plausible
Product category | Products | Source stream | ||||
|---|---|---|---|---|---|---|
Urine | Feces | Excreta | Sewage | Total | ||
Ash and slag | Ash | NA | 0 | 0 | 56 | 56 |
Slag | 0 | 0 | 0 | 0 | 0 | |
Composite fertilizer | Biocrude | NA | 0 | 0 | 0 | 0 |
Biostimulant | NA | 0 | 0 | 1 | 1 | |
Organomineral fertilizer | NA | 0 | 0 | 24 | 24 | |
Fecal-derived organic matter | Biochar | NA | 2 | 2 | 95 | 99 |
Bioslurry | NA | 0 | 1 | 0 | 1 | |
Biosolid | NA | 35 | 28 | 3910 | 3973 | |
Solution: macronutrient | Nutrient solution – K | 0 | 0 | 0 | 0 | 0 |
Nutrient solution – N | 5 | 0 | 0 | 0 | 5 | |
Nutrient solution – N | P | K | 0 | 0 | 0 | 0 | 0 | |
Nutrient Solution – P | 0 | 0 | 0 | 1 | 1 | |
Solution: multinutrient | Effluent – treated | concentrated | NA | 0 | 19 | 1719 | 1738 |
Urine – treated | concentrated | 107 | NA | NA | NA | 107 | |
Nutrient-enriched filter | Nutrient-enriched sorbent | 16 | 0 | 0 | 21 | 37 |
Precipitate: multimineral | Urine – dried | 0 | 0 | 0 | 0 | 0 |
Precipitate: monomineral | Ammonium crystals | 0 | 0 | 0 | 0 | 0 |
Calcium phosphate | 1 | 0 | 0 | 6 | 7 | |
Iron phosphate | 0 | 0 | 0 | 2 | 2 | |
K-struvite | 1 | 0 | 0 | 2 | 3 | |
Methylene urea crystals | 0 | 0 | 0 | 0 | 0 | |
Other phosphates | 1 | 0 | 0 | 2 | 3 | |
Struvite | 14 | 0 | 0 | 51 | 65 | |
Protein biomass | Fish | 0 | 0 | 0 | 0 | 0 |
Insect larvae | 0 | 0 | 0 | 0 | 0 | |
Macrophytes | 0 | 0 | 0 | 4 | 4 | |
Microalgae | 0 | 0 | 0 | 10 | 10 | |
Plant | 0 | 0 | 0 | 0 | 0 | |
Protein | 0 | 0 | 0 | 0 | 0 | |
Worms | 0 | 0 | 0 | 0 | 0 | |
Total | 145 | 37 | 50 | 5904 | 6136 | |