Featured Research

from universities, journals, and other organizations

Electrically Based Technologies Heat Up The Cleanup Market

Date:
September 14, 1997
Source:
Pacific Northwest National Laboratory
Summary:
Technologies that promise faster, cheaper and more effective cleanup of certain contaminated soils now are available commercially through a new company formed jointly by Battelle and Terra Vac Corporation of Irvine, Calif.

RICHLAND, Wash. -- Technologies that promise faster, cheaper and more effective cleanup of certain contaminated soils now are available commercially through a new company formed jointly by Battelle and Terra Vac Corporation of Irvine, Calif.

Current Environmental Solutions LLC will bring to market two electrically based technologies -- Six-Phase Soil Heating and In Situ Corona. Six-Phase Soil Heating is a rapid, cost-effective technique that steam strips contaminants from soils in place, eliminating the need for excavation or soil pretreatment. In Situ Corona is designed to destroy toxic materials such as chlorinated solvents, PCBs, pesticides and industrial fuel oils and lubricants. The technologies were developed by Battelle researchers at Pacific Northwest National Laboratory through Department of Energy funding. Battelle operates Pacific Northwest for DOE.

CES, based in Richland, Wash., initially will focus on the deployment of Six-Phase Soil Heating as well as further development of In Situ Corona.

Six-Phase Soil Heating relies on an electrical current to heat the soil, causing moisture to boil and strip volatile and semi-volatile contaminants from soil particles. The contaminated steam is removed through venting and treated above ground.

The splitting of conventional three-phase electricity into six separate electrical phases allows for more uniform heating and larger treatment areas. Unlike conventional vapor extraction methods, CES's technique is effective in tightly bound soils, such as silts and clays, as well as saturated soils. The process not only is less expensive than many conventional technologies, but quicker, requiring weeks to remediate large sites versus months or years with other soil-venting technologies.

Whereas the soil heating technique removes contaminants for above-ground treatment, In Situ Corona is designed to destroy organic contaminants underground. Higher voltages are used to create an ionizing plasma, similar to a match flame, that destroys organic contaminants in place, or in situ. This method is effective at destroying nonvolatile contaminants such as greases, pesticides and transformer oils containing PCBs. In Situ Corona is still under development; however, Six-Phase Soil Heating has been demonstrated at several sites across the United States over the past four years.

In a field demonstration at the Savannah River Site in 1993, soil heating was used to treat more than 675 metric tons of soil contaminated with trichlorethylene and perchloroethylene, including organics suspended in a clay layer nine meters (29.5 feet) below the surface. Within 25 days, 99.7 percent of the contaminants were removed. Most recently, the technique was used to treat contaminated soil at an electronics manufacturing plant, where more than 4,990 kilograms (11,000 pounds) of perchloroethylene was removed from tight clay soil within six months. Six-Phase Soil Heating also is being developed to treat dense organic liquids in aquifers, an application that was tested successfully at Dover Air Force Base.

For more information, contact Theresa Bergsman, Current Environmental Solutions, at (509) 943-8810.

Terra Vac is a multinational environmental engineering firm specializing in in situ soil and groundwater remediation and site assessments with 11 offices on three continents. Battelle serves industry and government clients in 30 countries by developing, commercializing and managing technology.


Story Source:

The above story is based on materials provided by Pacific Northwest National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

Pacific Northwest National Laboratory. "Electrically Based Technologies Heat Up The Cleanup Market." ScienceDaily. ScienceDaily, 14 September 1997. <www.sciencedaily.com/releases/1997/09/970914233140.htm>.
Pacific Northwest National Laboratory. (1997, September 14). Electrically Based Technologies Heat Up The Cleanup Market. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/1997/09/970914233140.htm
Pacific Northwest National Laboratory. "Electrically Based Technologies Heat Up The Cleanup Market." ScienceDaily. www.sciencedaily.com/releases/1997/09/970914233140.htm (accessed August 1, 2014).

Share This




More Earth & Climate News

Friday, August 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
Powered by NewsLook.com
Big Waves In Arctic Ocean Threaten Polar Ice

Big Waves In Arctic Ocean Threaten Polar Ice

Newsy (July 30, 2014) Big waves in parts of the Arctic Ocean are unprecedented, mainly because they used to be covered in ice. Video provided by Newsy
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
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