Navigation Links
USDA patents method to reduce ammonia emissions

Capturing and recycling ammonia from livestock waste is possible using a process developed by U.S. Department of Agriculture (USDA) researchers. This invention could help streamline on-farm nitrogen management by allowing farmers to reduce potentially harmful ammonia emissions and concentrate nitrogen in a liquid product to sell as fertilizer.

The work was conducted by Agricultural Research Service (ARS) scientists Matias Vanotti and Ariel Szogi at the agency's Coastal Plains Soil, Water and Plant Research Center in Florence, S.C. ARS is USDA's chief intramural scientific research agency, and this research supports the USDA priorities of responding to climate change and promoting international food security.

The system uses gas-permeable membranes that are similar to materials already used in waterproof outdoor gear and biomedical devices. Using these materials, the scientists recorded an average removal rate from 45 to 153 milligrams of ammonia per liter per day when manure ammonia concentrations ranged from 138 to 302 milligrams of ammonia per liter.

When manure acidity decreased, ammonia recovery increased. For instance, the scientists were able to recover around 1.2 percent of the total ammonia emissions per hour from manure at pH 8.3. But the recovery rate increased 10-fold to 13 percent per hour for manure at pH 10.0.

In a follow-up study, Vanotti and Szogi immersed the membrane module into liquid manure that had 1,290 milligrams of ammonia per liter. After nine days, the total ammonia concentration decreased about 50 percent to 663 milligrams per liter and acidity increased from pH 8.1 to 7.0. This meant that the gaseous or free ammonia in the liquidthe portion of the total ammonia linked to ammonia emissions--decreased 95 percent from 114.2 to 5.4 milligrams per liter.

The scientists used the same process in 10 consecutive batches of raw swine manure and ended up recovering concentrated nitrogen in a clear solution that contained 53,000 milligrams of ammonia per liter.

USDA filed for a patent on this invention in June of 2011.


Contact: Ann Perry
United States Department of Agriculture - Research, Education and Economics

Related biology news :

1. Aware Announces Closing Of Sale Of Selected Patents
2. Aware Announces Sale of Selected Patents
3. Improved Authentication and Confidentiality Protection. ICAP Patent Brokerage Announces for Auction Important Patents in Data Encryption and Document Security
4. New NIST screening method identifies 1,200 candidate refrigerants to combat global warming
5. Chemists develop reversible method of tagging proteins
6. Researchers develop rapid method to measure carbon footprints
7. Chilling methods could change meat tenderness
8. New DNA-method tracks fish and whales in seawater
9. New method: Research team analyzes stress biology in babies
10. Researchers develop method to grow artificial tissues with embedded nanoscale sensors
11. University of Minnesota engineering researchers discover new non-invasive method for diagnosing epilepsy
Post Your Comments:
(Date:11/12/2015)... , Nov. 12, 2015  Arxspan has ... of MIT and Harvard for use of its ... information management tools. The partnership will support the ... biological and chemical research information internally and with ... be used for managing the Institute,s electronic laboratory ...
(Date:11/9/2015)... ) ... "Global Law Enforcement Biometrics Market 2015-2019" ... ) has announced the addition of ... 2015-2019" report to their offering. ... ) has announced the addition of the ...
(Date:10/29/2015)... 2015  The J. Craig Venter Institute (JCVI) policy ... and Biosecurity: Lessons Learned and Options for the Future," ... Human Services guidance for synthetic biology providers has worked ... --> --> Synthetic biology promises ... to pose unique biosecurity threats. It now is easier ...
Breaking Biology News(10 mins):
(Date:11/26/2015)... , England , November 26, 2015 ... Lightpoint Medical, an innovative medical device company specializing in imaging ... grant from the European Commission as part of the Horizon ... the company to carry out a large-scale clinical trial in ... -->      (Logo: , --> ...
(Date:11/25/2015)... HOLLISTON, Mass. , Nov. 25, 2015 ... a biotechnology company developing bioengineered organ implants for life-threatening ... will present at the LD Micro "Main Event" investor ... PT. The presentation will be webcast live and posted ... also be available at the conference for one-on-one meetings ...
(Date:11/25/2015)... 25, 2015 The Global ... a professional and in-depth study on the current ... (Logo: ) , The ... including definitions, classifications, applications and industry chain structure. ... international markets including development trends, competitive landscape analysis, ...
(Date:11/24/2015)... Therapeutics, Inc. (NASDAQ: HALO ) will be presenting at the ... on Wednesday, December 2 at 9:30 a.m. ET/6:30 a.m. PT . ... a corporate overview. th Annual Oppenheimer Healthcare Conference ... a.m. PT . Jim Mazzola , vice president of ... --> th Annual Oppenheimer Healthcare Conference in ...
Breaking Biology Technology: