Pig poo power the answer to China's porky poser?

SYDNEY Wed May 2, 2012 11:05am IST

A pig is pictured at a farm on the outskirts of Kunming, capital of southwest China's Yunnan province November 30, 2011. REUTERS/Jason Lee

A pig is pictured at a farm on the outskirts of Kunming, capital of southwest China's Yunnan province November 30, 2011.

Credit: Reuters/Jason Lee

Related Topics

SYDNEY (Reuters) - Seven hundred million pigs produce a lot of poo.

China's love of pork presents a mountain of a problem for the environment, 1.4 million tonnes of pig poo a year to be precise, but an Australian company believes it has part of the answer.

Why not turn the pig poo into power?

Using a bioreactor called "PooCareTM" and other technology, the pig manure is converted into biofuel for cooking and heating while the residual goes to farmers as nutrient-rich fertilisers.

"The benefits are energy and fuel for farmers as well as preventing further contamination of the environment," said Ravi Naidu, chief scientist at CRC for Contamination Assessment and Remediation of the Environment (CRC Care), a South Australian-based firm involved in drawing up the technology.

"So it's really a green technology from that perspective," Naidu, a University of South Australia professor, told Reuters.

The process involves a bioreactor 30 m (98 ft) long, 10 m (33 ft) high and 4 m (13 ft) wide. It is set below ground and waste is fed through it slowly at a pre-determined temperature.

This converts solid waste into a biogas that is then pumped through gas tanks that can be delivered to the local community. The entire process takes about a month, with the first biogenerator already running at a farm in Wuhan, central China.

China has an estimated 700 million pigs, producing some two-thirds of the meat consumed there annually, so the scale of the problem can't be underestimated.

Only one tenth of pig waste is used now as manure. It is estimated the nutrients lost in the waste of one pig alone are worth about A$50 per year. There is a vast disparity in rural and urban incomes with farmers earning around $75 per month.

The potential health hazards are worse.

"Pig waste contains a high level of nitrate, which in liquid form can contaminate ground water and in flake form can contaminate lakes, posing human health risks," Naidu said.

Chinese scientists and Hong Kong-based technology firm HLM Asia Ltd also took part in developing the technology, which costs roughly A$35,000 for one bioreactor. Mass production would bring costs down, Naidu said.

(Editing by Elaine Lies and Paul Tait)

FILED UNDER:
Comments (0)
This discussion is now closed. We welcome comments on our articles for a limited period after their publication.

  • Most Popular
  • Most Shared

REUTERS SHOWCASE

Literary Giant Dies

Literary Giant Dies

Mourning and memories in Garcia Marquez's languid hometown.  Full Article 

Film Festival

Film Festival

Sun, yachts and stars beckon visitors to Cannes.  Full Article 

Royal Tour

Royal Tour

Britain's Duke and Duchess of Cambridge visit beach in Sydney.  Video 

On Trial

On Trial

Singer Chris Brown's assault trial delayed to next week.  Full Article 

Accused Of Rape

Accused Of Rape

'X-Men' director Bryan Singer accused of drugging, raping teen.  Full Article 

Legal Case

Legal Case

Rihanna settles multimillion-dollar lawsuit with ex-accountants.  Full Article 

Richest Rappers

Richest Rappers

The wealthiest rappers according to Forbes.  Slideshow 

Reuters India Mobile

Reuters India Mobile

Get the latest news on the go. Visit Reuters India on your mobile device.  Full Coverage