Featured Research

from universities, journals, and other organizations

USDA patents method to reduce ammonia emissions

Date:
November 1, 2012
Source:
USDA/Agricultural Research Service
Summary:
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.

A device invented by ARS researchers could give on-farm nitrogen management a boost by capturing and recycling ammonia waste from livestock production as fertilizer.
Credit: Photo by Regis Lefebure.

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.

Related Articles


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 liquid -- the 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.

Read more about this work in the November/December 2012 issue of Agricultural Research magazine: http://www.ars.usda.gov/is/AR/archive/nov12/livestock1112.htm


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. The original article was written by Ann Perry. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "USDA patents method to reduce ammonia emissions." ScienceDaily. ScienceDaily, 1 November 2012. <www.sciencedaily.com/releases/2012/11/121101131601.htm>.
USDA/Agricultural Research Service. (2012, November 1). USDA patents method to reduce ammonia emissions. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2012/11/121101131601.htm
USDA/Agricultural Research Service. "USDA patents method to reduce ammonia emissions." ScienceDaily. www.sciencedaily.com/releases/2012/11/121101131601.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Anglerfish Rarely Seen In Its Habitat Will Haunt You

Anglerfish Rarely Seen In Its Habitat Will Haunt You

Newsy (Nov. 22, 2014) For the first time Monterey Bay Aquarium recorded a video of the elusive, creepy and rarely seen anglerfish. Video provided by Newsy
Powered by NewsLook.com
Birds Around the World Take Flight

Birds Around the World Take Flight

Reuters - Light News Video Online (Nov. 22, 2014) An imperial eagle equipped with a camera spreads its wings over London. It's just one of the many birds making headlines in this week's "animal roundup". Jillian Kitchener reports. Video provided by Reuters
Powered by NewsLook.com
Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com
Raw: Baby Okapi Born at Houston Zoo

Raw: Baby Okapi Born at Houston Zoo

AP (Nov. 20, 2014) The Houston Zoo released video of a male baby okapi. Okapis, also known as the "forest giraffe", are native to the Democratic Republic of the Congo in Central Africa. Video is mute from source. (Nov. 20) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins