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Scientists at the University of Illinois Urbana-Champaign created a custom form of biochar designed to capture phosphorus from farm runoff to prevent waterway pollution.
Mckinsey finds that human activity has already extended beyond the “safe operating space” for four of these boundaries: biodiversity loss, chemical and plastic pollution, nutrientpollution, and greenhouse-gas (GHG) emissions. As a sector, agriculture has the single largest direct impact on planetary boundaries.
Researchers at the University of Saskatchewan have developed a bioplastic pellet made from marine polysaccharide (chitosan), eggshells, and wheat straw that absorbs phosphate nutrientpollutant from water. The biodegradable pellets can then be applied to agricultural land as fertilizer.
The Rich Earth Institute reports that interest in urine nutrient reclamation has been surging, driven by spiking synthetic fertilizer prices, global supply disruptions, and increasing regulations on aquatic nutrientpollution.
At the root of a lot of the [Salton Sea] difficulties are nutrient inputs that are coming in from agriculture.” ” Last year, the California Water Board began developing a total maximum daily loads (TMDL) in a bid to regulate nutrientpollution flowing into the Salton Sea, but it will likely take years to implement.
This could possibly amount to less nutrientpollution in the waterways in comparison to synthetic fertilizers. “What’s nice about the wool pellet is because it’s so fibrous, it’s a slow release; it really slows down that process,” says Hagen. During heavy rainfall, it doesn’t all wash away.
Its high cation exchange capacity (CEC) allows it to adsorb and retain nutrients, such as nitrogen and phosphorus, preventing them from washing away into waterways. This improvement in nutrient retention enhances crop growth and protects surrounding water bodies from nutrientpollution.
Many of these facilities are located near communities with environmental justice concerns that have bodies of water impaired by nutrientpollution. Environmental Protection Agency (EPA) announced a proposed regulation that would revise wastewater discharge standards for facilities that process meat and poultry products.
” Diverting urine from the wastewater stream for use as fertilizer would also address the two largest contributors of nutrientpollution in the U.S., Our hay yields have gone way up as a result [of the urine].”
You can also lose valuable nutrients if they wash into waterways where they cause nutrientpollution problems in lakes and oceans that harm marine life. If your soil is not healthy enough to support healthy crops, you have to add fertilizer or risk losing your investment in seeds or plants.
Joshua Reitsma, a marine chemist at the nearby Woods Hole Oceanographic Institut ion , says this effluent is responsible for 80 percent of the Capes nutrientpollution, leading to algal blooms that blanket the surface in summer and fall to the bottom in winter.
The researchers mapped the impact of each agriculture sector on four measures including greenhouse gas emissions, freshwater use, habitat disturbance, and nutrientpollution. A 2021 study that detailed the impact of land-based and aquatic food production found that aquatic systems also put considerable pressure on the planet.
Advocates also highlighted the agency’s findings that the technology needed to reduce processing plants’ nutrientpollution is already available and being used successfully, resulting in pollution well below what the rules would require.
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