Featured Research

from universities, journals, and other organizations

Biogas climate benefit greater than previously thought?

Date:
February 23, 2010
Source:
Expertanswer (Expertsvar in Swedish)
Summary:
Biogas from refuse produces 95 per cent less greenhouse gas emissions than gasoline, according to a new research report. With a few simple improvements to the biogas plants, the figure can rise to 120 per cent -- i.e. biogas becomes more than climate neutral. This can be compared with the standard figures used today, which indicate that biogas produces 80 per cent lower emissions than gasoline.

Biogas from refuse produces 95 per cent less greenhouse gas emissions than gasoline, according to a new research report. With a few simple improvements to the biogas plants, the figure can rise to 120 per cent -- i.e. biogas becomes more than climate neutral. This can be compared with the standard figures used today, which indicate that biogas produces 80 per cent lower emissions than gasoline.

A research group at the Lund University has calculated the figures on behalf of the Swedish Energy Agency after having analysed a biogas plant in Skεne. The case study will make it easier to study and optimise other biogas facilities. In Sweden there are some 20 similar plants, producing biogas for use in cars and other vehicles. As much vehicle gas is produced by sewage treatment works that produce biogas from sewage sludge.

"The plant we have studied is fairly representative of an average biogas plant that processes waste and manure. In our study we have calculated emissions for the entire production chain and included both direct and indirect emissions. What is particular to our study is that we have included indirect factors that have not previously been taken into account, for example how the ground is affected when mineral fertiliser is replaced with bio-fertiliser. In addition, methane leaching from the plant is measured and not based on standard data that is often otherwise used in this kind of analysis," points out Mikael Lantz, doctoral student in Environmental and Energy Systems Studies at Lund University.

The researchers also observed that the biogas releases 16 gram/kWh biogas of the greenhouse gases methane, laughing gas and carbon dioxide. These emissions are around 95 per cent lower than from gasoline and significantly better than the standard values used today.

In order to make the biogas even more climate-friendly, the researchers propose that the plants should be heated using wood chips, which could also be cheaper for the biogas producer.

"Another suggestion is to cover the bio-fertiliser stores to reduce the losses of nitrogen and reduce dilution with rain water. The plant has already implemented this measure. By using a few other recommendations as well, the emissions can be reduced to 120 per cent lower than gasoline, without increasing the production costs by more than a couple of φre per kWh of vehicle gas," explains Mikael Lantz.


Story Source:

The above story is based on materials provided by Expertanswer (Expertsvar in Swedish). Note: Materials may be edited for content and length.


Cite This Page:

Expertanswer (Expertsvar in Swedish). "Biogas climate benefit greater than previously thought?." ScienceDaily. ScienceDaily, 23 February 2010. <www.sciencedaily.com/releases/2010/02/100218092611.htm>.
Expertanswer (Expertsvar in Swedish). (2010, February 23). Biogas climate benefit greater than previously thought?. ScienceDaily. Retrieved September 15, 2014 from www.sciencedaily.com/releases/2010/02/100218092611.htm
Expertanswer (Expertsvar in Swedish). "Biogas climate benefit greater than previously thought?." ScienceDaily. www.sciencedaily.com/releases/2010/02/100218092611.htm (accessed September 15, 2014).

Share This



More Matter & Energy News

Monday, September 15, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Manufacturer Prints 3-D Car In Record Time

Manufacturer Prints 3-D Car In Record Time

Newsy (Sep. 15, 2014) — Automobile manufacturer Local Motors created a drivable electric car using a 3-D printer. Printing the body only took 44 hours. Video provided by Newsy
Powered by NewsLook.com
Refurbished New York Subway Tunnel Unveiled After Sandy Damage

Refurbished New York Subway Tunnel Unveiled After Sandy Damage

Reuters - US Online Video (Sep. 15, 2014) — New York officials unveil subway tunnels that were refurbished after Superstorm Sandy. Nathan Frandino reports. Video provided by Reuters
Powered by NewsLook.com
Frustration As Drone Industry Outpaces Regulation In U.S.

Frustration As Drone Industry Outpaces Regulation In U.S.

Newsy (Sep. 14, 2014) — U.S. firms worry they’re falling behind in the marketplace as the FAA considers how to regulate commercial drones. Video provided by Newsy
Powered by NewsLook.com
Smart Gun Innovators Fear Backlash From Gun Rights Advocates

Smart Gun Innovators Fear Backlash From Gun Rights Advocates

Newsy (Sep. 14, 2014) — Winners of a contest for smart gun design are asking not to be named after others in the industry received threats for marketing similar products. 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