Subscribe to our free daily newsletters
. Earth Science News .




Subscribe to our free daily newsletters



FROTH AND BUBBLE
Environmental Impact Of Animal Waste

This image shows swine houses and wastewater lagoon in North Carolina. Credit: Terry A. Matheny
by Staff Writers
Madison WI (SPX) Mar 09, 2011
North and South Carolina have seen a steady increase in swine production over the last 15 years. In North Carolina alone, swine production generates approximately a quarter of the state's gross farm receipts. The presence of so many large-scale pig farms leads to the problem of proper animal waste disposal.

The most common practice in the Carolinas is storing animal waste in anaerobic lagoons. They are primarily used to concentrate and passively treat urine and feces but because of the widespread use of this practice, the environmental impact could be quite severe. Conflicting reports implicate lagoon sites to be responsible for high emission rates of nitrogen gas and volatized ammonia.

A team of ARS-USDA scientistsexamined a series of commercial, anaerobic, swine wastewater lagoons in North and South Carolina for genes involved in the nitrogen cycling process.

Nitrification and denitrification are the parts of the process responsible for turning ammonia into nitrogen gas. After analyzing eight lagoons and measuring the abundance of four nitrogen cycling genes, researchers concluded that the denitrifying and nitrifying organisms were not active despite there being a thriving amount. Acidification and eutrophication of the surrounding ecosystem could be the result of prolonged exposure to volatilized ammonia.

Thomas F. Ducey, one of the authors of the study says, "These anaerobic lagoons have relatively consistent levels of nitrogen-cycling genes throughout their water column. While they are similar to natural ecosystems, they are not as high as some wastewater treatment system. Moreover, these gene levels did not translate into the high denitrification enzyme activity that is typical of wastewater treatment systems."

Ducey adds, "The work is part of the ARS Agricultural and Industrial Byproducts National Program, which has the mission to effectively and safely manage and use manure and other agricultural and industrial byproducts in ways that maximize their potential benefits while protecting the environment and human and animal health."



Share This Article With Planet Earth
del.icio.usdel.icio.us DiggDigg RedditReddit
YahooMyWebYahooMyWeb GoogleGoogle FacebookFacebook



Related Links
American Society of Agronomy
Our Polluted World and Cleaning It Up



Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News


FROTH AND BUBBLE
Protecting Ecosystems, Pollution Remediation Goals Of Research
Houston TX (SPX) Mar 09, 2011
Cleaning up pollution, protecting soil from erosion and maintaining species-rich ecosystems are some of the goals of a computational ecology project by a University of Houston (UH) scientist and his team. Published recently in a top journal, the work sheds light on a new method to speed up research in the ecology of plants. Marc Garbey, a professor of computer science and mathematics at UH ... read more







FROTH AND BUBBLE
Christchurch quake will cost Munich Re one billion dollars

Haiti carnival turns dark as it returns after quake

Carnival seeks to rid Haiti of its ills

Bleak future for Christchurch as population flees

FROTH AND BUBBLE
Australian firm to open Malaysian rare earths plant

Rare earths to be refined in Malaysia

YouTube growth sparks hiring binge

Nokia Siemens delays Motorola purchase indefinitely

FROTH AND BUBBLE
EU, Iceland hold talks in new bid to end 'mackerel war'

Rainwater Harvesting

New UF Study Shows Some Sharks Follow Mental Map To Navigate Seas

Argentine fisheries yields down a third

FROTH AND BUBBLE
Pace of polar ice melt 'accelerating rapidly': study

Soot Packs A Punch On Tibetan Plateau's Climate

Some Antarctic Ice Is Forming From Bottom

Shrinking Tundra, Advancing Forests: How The Arctic Will Look By Century's End

FROTH AND BUBBLE
UN alarmed at huge decline in bee numbers

Philippines to fight invading species

Mexico approves GM maize pilot project

Study Shows No-Till's Benefits For Pacific Northwest Wheat Growers

FROTH AND BUBBLE
Floods swamp cyclone-hit areas of Australia

25 dead, 250 injured in China quake

Major 7.3 offshore quake jolts Japan

24 dead in Mozambique flood season

FROTH AND BUBBLE
Over 500 flee restive Casamance flee to Gambia: UN

First protests in Guinea since Conde takes power

China lends Angola $15 bn but creates few jobs

Mozambique police deny Swazi arms shipment report

FROTH AND BUBBLE
Brain's short-term memory 'layers' studied

You Are What Your Mother Ate

Southern Africa may be home of modern man

'Overweight' Chinese show lowest death risk: study


The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement