20 May 2013:
System Converts Pig Waste
Into Biogas at Chinese Pig Farms
An international team of researchers has developed a system that will help Chinese farmers convert massive amounts of pig waste
into a renewable source of energy and fertilizer. The project, led by
Australia-based Cooperative Research Centre for Contamination Assessment and Remediation of the Environment
(CRC CARE), uses a two-step anaerobic biodigester that is able to treat 73,000 tons of waste annually, producing 380 cubic meters of biogas daily and about 5,600 tons of fertilizer per year. According to its developers, it will also provide a solution to a growing waste disposal challenge in China, where pigs generate more than 1.4 million tons of excrement annually. “Only 10 percent of this waste is currently treated, posing a considerable disposal headache, as well as health and water quality risks,” said Ravi Naidu, managing director of CRC CARE. While the system is being introduced at pig farms across China, Naidu says the technology could eventually help solve critical waste management challenges worldwide and make the pork industry more sustainable.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
A 2015 Yale e360 Video Contest winner captures stunning images of wild salmon runs in Alaska. Watch the video.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.