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.

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 July 28, 2014 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 July 28, 2014).

Share This




More Plants & Animals News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Traditional African Dishes Teach Healthy Eating

Traditional African Dishes Teach Healthy Eating

AP (July 28, 2014) Classes are being offered nationwide to encourage African Americans to learn about cooking fresh foods based on traditional African cuisine. The program is trying to combat obesity, heart disease and other ailments often linked to diet. (July 28) Video provided by AP
Powered by NewsLook.com
Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Newsy (July 28, 2014) The asteroid that killed the dinosaurs struck at the worst time for them. A new study says that if it hit earlier or later, they might've survived. Video provided by Newsy
Powered by NewsLook.com
Raw: Sea Turtle Hatchlings Emerge from Nest

Raw: Sea Turtle Hatchlings Emerge from Nest

AP (July 27, 2014) A live-streaming webcam catches loggerhead sea turtle hatchlings emerging from a nest in the Florida Keys. (July 27) Video provided by AP
Powered by NewsLook.com
Russia Saves Gecko Sex Satellite, Media Has Some Fun With It

Russia Saves Gecko Sex Satellite, Media Has Some Fun With It

Newsy (July 27, 2014) The satellite is back under ground control after a tense few days, but with a gecko sex experiment on board, the media just couldn't help themselves. Video provided by Newsy
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:
from the past week

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