Navigation Links
USDA patents method to reduce ammonia emissions
Date:11/1/2012

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
ann.perry@ars.usda.gov
301-504-1628
United States Department of Agriculture - Research, Education and Economics
Source:Eurekalert

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:
*Name:
*Comment:
*Email:
(Date:5/16/2016)... YORK , May 16, 2016   EyeLock ... solutions, today announced the opening of an IoT Center ... to strengthen and expand the development of embedded iris ... an unprecedented level of convenience and security with unmatched ... authenticate one,s identity aside from DNA. EyeLock,s platform uses ...
(Date:4/28/2016)... -- First quarter 2016:   , Revenues ... first quarter of 2015 The gross margin was 49% ... and the operating margin was 40% (-13) Earnings per ... from operations was SEK 249.9 M (21.2) , Outlook ... 7,000-8,500 M. The operating margin for 2016 is estimated ...
(Date:4/15/2016)... , April 15, 2016 ... the,  "Global Gait Biometrics Market 2016-2020,"  report to ... http://photos.prnewswire.com/prnh/20160330/349511LOGO ) , ,The global gait biometrics ... of 13.98% during the period 2016-2020. ... angles, which can be used to compute factors ...
Breaking Biology News(10 mins):
(Date:6/27/2016)...  Liquid Biotech USA , ... Sponsored Research Agreement with The University of Pennsylvania ... cancer patients.  The funding will be used to ... clinical outcomes in cancer patients undergoing a variety ... employed to support the design of a therapeutic, ...
(Date:6/24/2016)... 24, 2016  Regular discussions on a range of subjects ... the two entities said Poloz. Speaking at a ... , he pointed to the country,s inflation target, which ... "In certain areas ... have common economic goals, why not sit down and address ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... While the ... such as the Cary 5000 and the 6000i models are higher end machines that ... the height of the spectrophotometer’s light beam from the bottom of the cuvette holder. ...
(Date:6/23/2016)... ... June 23, 2016 , ... Mosio, a ... eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with experienced clinical research ... by providing practical tips, tools, and strategies for clinical researchers. , “The landscape ...
Breaking Biology Technology: