Table 7 Ecotechnologies per top four locations (with or more than 13 studies), including studies that have not stated country
Ecotechnology | Belgium | Canada | Finland | United States | No stated country |
|---|---|---|---|---|---|
(Vermi)composting | 2 | 1 | 9 | ||
Ammonia stripping | 1 | ||||
Anaerobic digestion | 2 | 3 | 3 | ||
Aquaponics | 1 | ||||
Bioreactors | 1 | 2 | |||
Combination | 1 | 4 | 2 | 4 | |
Constructed wetlands | 2 | ||||
Cover crops | 1 | 7 | |||
Crop management | 2 | 2 | 1 | ||
Electrocoagulation | 1 | ||||
Gasification | |||||
Industry systems | 2 | ||||
Manure treatment/management | 2 | 2 | 1 | ||
Membrane filtration | 1 | 4 | 1 | ||
Microalgae cultivation | |||||
Microbial fuel cells | |||||
Nanoparticles to control P leaching | 1 | 1 | |||
Nutrient biofilters | 1 | ||||
P removal from drainage ditches | 1 | ||||
Pyrolysis | 2 | ||||
Scrubber for NH4 recovery | 1 | 1 | |||
Source separation | 1 | 1 | |||
Struvite precipitation | 4 | 2 | 1 | ||
Soil amendments | 4 | 5 | 5 | 3 | 5 |
Algal turf scrubber | 1 | 1 | |||