Phosphorus Recovery from Livestock and Municipal Waste Streams: ARS research scientists developed a patented treatment process, called Quick Wash, for extraction and recovery of phosphorus from poultry litter and pig manure solids, but research has shown that the approach is equally effective with municipal biosolids. The quick wash process generates two products: 1) washed solid residue, and 2) concentrated recovered P material. USDA granted an exclusive license to Renewable Nutrients, LLC to commercialize the Quick Wash®.
Phosphorous recovery 2017 presentation... (eXtension)
Process for Removing and Recovering Phosphorus... (PDF)
From a PI’s Perspective: How We Made a T2 Success... (PDF)
Enhancing Recovery of Ammonia Using Gas-Permeable Membranes: The new system allows capture and recovery of ammonia from livestock wastewater. Using low-rate aeration instead of alkali chemicals, recovery efficiencies were 96-98% while costs were reduced 70%.
Ammonia Recovery from Digested Swine Manure...(PDF)
Recycling Ammonia Emissions as Fertilizer...(ARS magazine article)
Removal and Recovery of Amm. from Swine Manure...(PDF)
US Patent: Systems and Methods for Reducing Ammonia Emissions...(PDF)
Submerged NH3 trapping manifold...(Video)
Hydrothermal carbonization (HTC) for waste treatment and nutrient recovery: Agricultural wastes such as livestock mortalities can be safely treated with HTC to kill pathogens and destroy antibiotic resistance genes. Since the majority of nitrogen, phosphorous, calcium and magnesium remained integrated within the hydrochar material, the recovered hydrochar can be used as a plant fertilizer.
HPNS - High Performance Nitrifying Sludge: The HPNS technology developed by ARS allows rapid and effective nitrification of high-ammonium concentration livestock and municipal wastewaters under low temperatures.
US Patent: High Performance Nitrifying Sludge ... (PDF)
Novel anammox bacteria for wastewater treatment: The novel bacterial strain Brocadia caroliniensis is useful for the treatment of wastewater having undesirable levels of ammonia, including agricultural, industrial, or municipal wastewaters.
Recovery of Ammonia and Production of High-grade Phosphates From Animal and Municipal Effluents: The technology recovers ammonia and phosphorus from liquid effluents and produces phosphorus bio-minerals similar to the very-high phosphate grade commercial fertilizers favored by the fertilizer industry. USDA (ARS OTT) seeks a commercial partner to develop and market this invention (Docket 83.15)
Water Purification System For Space Exploration: Deammonification process uses USDA discovered microorganisms anammox Brocadia caroliniensis and HPNS nitrifiers. They were successfully tested by Pancopia Inc. (licensee) in NASA SBIR projects for purification of space wastewater.
Recovery of Amino Acids (Proteins) and Phosphorus from Manure: A novel method for extraction and recovering amino acids and phosphorus from manure has been developed. This could be a potential new revenue stream from wastes. A patent application has been filed by ARS (USDA Docket 80.15).
Waste-to-Worth 2017 presentation (eXtension)
Removal of environmental pollutants with biochar and hydrochar: Activated and non-activated biochar (pyrochar) and hydrochar made from several feedstocks (swine manure, chicken litter, hickory, and peanut hulls) can remove antimony, arsenic, copper, cadmium, and lead from water. Biochars are also able to sorb pesticides and thereby reduce contamination of water resources.
Removing pharmaceutical personal care products (PPCPs) from water with hydrochar: ARS scientists and university collaborators reported that hydrochars made from hydrothermal carbonization of swine manure and chicken litter have high sorption capacity for both polar and non-polar PPCPs. These hydrochars can be used as an environmental sorbent to remove PPCPs from water.
Recovery of Ammonia from Air in Poultry Barns: The ammonia recovery modules containing gas-permeable membranes are placed inside the poultry barns hanging from the roof and close to the litter, with ammonia concentrator tanks outside the barns.
Efficient treatment of ammonia, odor, pathogens and phosphorus in 3rd generation manure treatment technology: ARS Scientists at Florence, South Carolina together with business and university cooperators demonstrated and verified a 3rd generation wastewater treatment system (US Pat. 7,674,379) for swine manure that met one of the strictest environmental standards in the world at reduced cost.
Generation 3 Final Technical Performance Report...(PDF)
Gen 3 Improved Solid-Liquid Separation of Diluted Swine Manure ... (PDF)
More information on 3rd , 2nd and 1st generation systems development