Featured Research

from universities, journals, and other organizations

Cleaner Manure Burns Hotter In Ethanol Processing

Date:
May 24, 2007
Source:
Texas A&M University - Agricultural Communications
Summary:
Clean manure may sound like an oxymoron, but some researchers are working with feedyard owners to help them get the most "spark" from it as a fuel source. Some operators expect to begin using manure as a fuel source when producing ethanol for an E10 fuel blend.

Cleaning manure from feed pens is a common practice, but one that will have to be done more carefully in the future if the harvested product is to be used as a fuel source, according to Dr. Brent Auvermann, Texas Cooperative Extension engineering specialist.
Credit: Texas Cooperative Extension photo by Sharon Preece

Clean manure may sound like an oxymoron, but Dr. Brent Auvermann is working with feedyard owners to help them get the most "spark" from it as a fuel source.

Auvermann, a Texas Cooperative Extension engineering specialist, hosted "Producing High-Value Manure for BioFuels and Fertilizer" recently in Hereford. The meeting outlined work by Texas Agricultural Experiment Station researchers to determine best management practices for scraping manure from the feed pens. "We're doing something that has never been done before," said Arles "Bugs" Graham, Panda Energy International's general manager for the Hereford plant. Graham spoke at the meeting. "We're using your manure as an energy source," he said. "It's a very complex process."

After starting up the plant with natural gas as the boiler fuel, Panda Energy will eventually use manure as a fuel source when producing ethanol for an E10 fuel blend, Graham said.

The plant will initially process corn for ethanol, although the company is looking at alternative sources of starch to make the ethanol, and it will produce distiller's grains as a by-product.

"But manure is our future," Graham said, estimating each plant will use 1,500 tons a day.

Jim Adams, Panda Energy vice president-fuels, said the plant will begin asking yards in June to sign up for a percentage of their manure. The past winter was a wake-up call, Adams said. Sometimes when the weather is too wet, manure can't be harvested from the pens. Manure will be used by this fall, so "we have to start stockpiling now" to ensure a steady supply.

Adams said the plant will use manure on a six-day basis, requiring 70 to 80 truckloads per day. Panda's contractor will collect from the pens when they are dry enough, but will need to pull from stockpiles when pen surfaces are too wet.

Quality is the biggest issue, Auvermann said. The manure needs to burn at a minimum rate of 2,758 British thermal units per pound of manure. That number changes according to the amount of pollutants - moisture and dirt - included when the pen is scraped.

If all the water and contaminants were removed from the manure, the highest quality would be 8,500 Btu, "but we can't do that, because we can't take the ash out completely," he said.

Manure from soil-surfaced pens may not always meet the minimum heating value on an as-received basis, Auvermann said. Feedyard operators will have to take some steps to improve it.

The timeliness of collection and depth of scraping will be key to keeping dirt content below 60 percent and moisture content below 20 percent, he said. "Paving the pens with a crushed ash or a fly-ash material (from coal-fired power plants) will end up returning to you in the form of heating value big time," Auvermann said.

Partially composted manure from paved pens can have a heating value almost equivalent to that generated by burning Texas lignite coal, he said.

Feedyard owners should consider the process as "harvesting manure" rather than cleaning pens, Auvermann said. The ultimate goal is to have a hard, smooth, well-drained corral surface. Implementing good practices will pay at the bottom line, he said.

Conscientious manure harvesting can result in higher fuel and fertilizer values, reduced feed requirements for cattle, improved pen drainage, and reduced odor, dust and flies.


Story Source:

The above story is based on materials provided by Texas A&M University - Agricultural Communications. Note: Materials may be edited for content and length.


Cite This Page:

Texas A&M University - Agricultural Communications. "Cleaner Manure Burns Hotter In Ethanol Processing." ScienceDaily. ScienceDaily, 24 May 2007. <www.sciencedaily.com/releases/2007/05/070523113557.htm>.
Texas A&M University - Agricultural Communications. (2007, May 24). Cleaner Manure Burns Hotter In Ethanol Processing. ScienceDaily. Retrieved April 16, 2014 from www.sciencedaily.com/releases/2007/05/070523113557.htm
Texas A&M University - Agricultural Communications. "Cleaner Manure Burns Hotter In Ethanol Processing." ScienceDaily. www.sciencedaily.com/releases/2007/05/070523113557.htm (accessed April 16, 2014).

Share This



More Plants & Animals News

Wednesday, April 16, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Outbreak Now Linked To 121 Deaths

Ebola Outbreak Now Linked To 121 Deaths

Newsy (Apr. 15, 2014) The ebola virus outbreak in West Africa is now linked to 121 deaths. Health officials fear the virus will continue to spread in urban areas. Video provided by Newsy
Powered by NewsLook.com
In Washington, a Push to Sterilize Stray Cats

In Washington, a Push to Sterilize Stray Cats

AFP (Apr. 14, 2014) To curb the growing numbers of feral cats in the US capital, the Washington Humane Society is encouraging residents to set traps and bring the animals to a sterilization clinic, after which they are released.. Duration: 02:29 Video provided by AFP
Powered by NewsLook.com
After Attack, Officials Kill 5 Bears in Florida

After Attack, Officials Kill 5 Bears in Florida

AP (Apr. 14, 2014) Florida wildlife officials say they have killed five bears following an attack on a woman in a suburban subdivision in central Florida. Forty-five year-old Terri Frana was attacked by a large bear in her driveway Saturday. (April 14) Video provided by AP
Powered by NewsLook.com
Uruguay Opens Its First Cannabis Library

Uruguay Opens Its First Cannabis Library

AFP (Apr. 13, 2014) Uruguay opened its first Cannabis Library in Montevideo on Saturday, where people can come and read books on cannabis or take classes on how to grow the plant or even how to cook with it. Duration: 01:20 Video provided by AFP
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