Featured Research

from universities, journals, and other organizations

Wetlands Curb Hog Hormones In Waste Water

Date:
January 5, 2007
Source:
USDA/Agricultural Research Service
Summary:
Constructed wetlands may help reduce hormones in wastewater from hog farms, an Agricultural Research Service (ARS)-led team reported recently in Environmental Science and Technology.

Natural processes in specially built wetland areas can break down the hormones present in swine waste, thus keeping the compounds from building up and harming aquatic wildlife.
Credit: Photo by Scott Bauer

Constructed wetlands may help reduce hormones in wastewater from hog farms, an Agricultural Research Service (ARS)-led team reported recently in Environmental Science and Technology.

Related Articles


Recently, hog-farm operators have begun incorporating constructed wetlands into their wastewater treatments to reduce nitrogen and phosphorus in the effluent so that it can be spread onto crop fields without causing environmental harm. But little, if any, research has investigated the system's potential to diminish hormones that hogs excrete into wastewater.

The paper's authors are Nancy Shappell and Lloyd Billey with the ARS Biosciences Research Laboratory in Fargo, N.D.; Dean Forbes and G.P. Reddy of North Carolina Agricultural and Technical State University at Greensboro; and Terry Matheny, Matthew Poach and Patrick Hunt at the ARS Coastal Plains Soil, Water and Plant Research Center in Florence, S.C.

The work dovetails with increasing concern that hormones from livestock waste and other sources are accumulating in the environment and disrupting the endocrine-system function of fish and other aquatic life.

The team's 2004-05 study, conducted at a Greensboro hog-farrowing facility, checked for reproductive hormones--estrogens and androgens (including testosterone) and their metabolites. First, wastewater from the facility went into a manure pit, then into a series of lagoons for microbial degradation. Next, the effluent was pumped into one of four wetlands, then into a storage pond. To close the circuit, some of the "gray" water was flushed back into the barns. The wetland consisted of marsh areas with cattails and pond area, which was either open or covered with floating mats of vegetation.

The researchers took water samples over three seasons in 2004, and weekly in July 2005. They analyzed them for hormones, including a naturally secreted estrogen called estradiol, using liquid-chromatography mass-spectrometry analysis and the E-screen. The latter contains human mammary cells that multiply when exposed to estrogenic compounds.

By analyzing the effluent both before and after passing through the constructed wetlands, they determined the wetlands reduced estradiol activity by 83 to 93 percent. This reduction included estrone, the most prevalent of the estradiol metabolites.

ARS is the U.S. Department of Agriculture's chief scientific research agency.


Story Source:

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


Cite This Page:

USDA/Agricultural Research Service. "Wetlands Curb Hog Hormones In Waste Water." ScienceDaily. ScienceDaily, 5 January 2007. <www.sciencedaily.com/releases/2007/01/070102122719.htm>.
USDA/Agricultural Research Service. (2007, January 5). Wetlands Curb Hog Hormones In Waste Water. ScienceDaily. Retrieved January 25, 2015 from www.sciencedaily.com/releases/2007/01/070102122719.htm
USDA/Agricultural Research Service. "Wetlands Curb Hog Hormones In Waste Water." ScienceDaily. www.sciencedaily.com/releases/2007/01/070102122719.htm (accessed January 25, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, January 25, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Florida Might Legalize Black Bear Hunting

Florida Might Legalize Black Bear Hunting

Newsy (Jan. 24, 2015) A string of black bear attacks has Florida officials considering lifting the ban on hunting the animals to control their population. Video provided by Newsy
Powered by NewsLook.com
Ebola Killing Large Portion Of Ape Population

Ebola Killing Large Portion Of Ape Population

Newsy (Jan. 23, 2015) Experts estimate Ebola has wiped out one-third of the world&apos;s gorillas and chimpanzees. Video provided by Newsy
Powered by NewsLook.com
Controversy Shrouds Captive Killer Whale in Miami

Controversy Shrouds Captive Killer Whale in Miami

Reuters - Light News Video Online (Jan. 23, 2015) Activists hope the National Oceanic and Atmospheric Agency (NOAA) will label killer whales endangered, allowing lawyers to sue a Miami aquarium to release an orca into the wild after 44 years. Jillian Kitchener reports. Video provided by Reuters
Powered by NewsLook.com
‘Healthy’ Foods That Surprisingly Pack on Pounds

‘Healthy’ Foods That Surprisingly Pack on Pounds

Buzz60 (Jan. 23, 2015) Some &apos;healthy&apos; foods are actually fattening. Fitness and nutrition expert John Basedow (@JohnBasedow) shines a light on the sneaky foods like nuts, seeds, granola, trail mix, avocados, guacamole, olive oil, peanut butter, fruit juices and salads that are good for you...but not so much for your waistline. Video provided by Buzz60
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