Featured Research

from universities, journals, and other organizations

Pulp Waste Could Be Useful In Cement Production

Date:
March 29, 2009
Source:
Inderscience
Summary:
An alternative to landfill disposal for waste products of the paper industry that can be used to make clinker for cement production, according to new research.

An alternative to landfill disposal for waste products of the paper industry that can be used to make clinker for cement production is reported this month by Portuguese scientists in the International Journal of Materials Engineering Innovation.

Reports of the death of the newspaper and book industries are greatly exaggerated, if the growing volumes of pulp and paper wastes are anything to go by. This waste, which include grits and dregs as well various inorganic and organic materials, represents a major management concern.

Now, Fernando Castro and Candida Vilarinho of the University of Minho, Portugal, and colleagues have looked at the paper-making process and found a way to use the waste as raw materials in the production of clinker, a base material for Portland cement.

Chemical processing of wood to make pulp for paper manufacture usually involves a chemical treatment with sodium hydroxide and sodium sulfide, which produces good quality pulp but also releases large volumes of waste materials. Incorporated into construction materials, however, would not represent a health or environmental risk and prevents the need to send millions of tonnes of dregs and grits from the world's paper mills to landfill without a major energy penalty for the process.

The Portucel paper plant at Viana do Castelo, in Northern Portugal produces almost 300,000 tonnes of paper per year from pine and eucalyptus trees and generates more than 3,000 tonnes of wet dregs and grits.

The researchers have now carried out industrial trials with conventional raw clinker and clinker to which they added grits and dregs at 0.25% and 0.13%. They processed the materials as they would normally be treated for cement production and then tested their chemical composition and leaching behaviour. The resulting products are just as robust as conventional cement and do not degrade to release toxic components. During the trials at the Secil clinker plant in Maceira - Leiria the quality of the gaseous emissions were measured and no significant effect has been detected as a consequence of waste incorporation.

"Our results show that such incorporation could be an effective process for waste management from both the environmental and economic points of view," the researchers conclude.

 


Story Source:

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


Cite This Page:

Inderscience. "Pulp Waste Could Be Useful In Cement Production." ScienceDaily. ScienceDaily, 29 March 2009. <www.sciencedaily.com/releases/2009/03/090323161229.htm>.
Inderscience. (2009, March 29). Pulp Waste Could Be Useful In Cement Production. ScienceDaily. Retrieved April 20, 2014 from www.sciencedaily.com/releases/2009/03/090323161229.htm
Inderscience. "Pulp Waste Could Be Useful In Cement Production." ScienceDaily. www.sciencedaily.com/releases/2009/03/090323161229.htm (accessed April 20, 2014).

Share This



More Earth & Climate News

Sunday, April 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Drought Concerns May Hurt Lake Tourism

Drought Concerns May Hurt Lake Tourism

AP (Apr. 18, 2014) — Operators of recreational businesses on western reservoirs worry that ongoing drought concerns will keep boaters and other visitors from flocking to the popular summer attractions. (April 18) Video provided by AP
Powered by NewsLook.com
Man Claims He Found Loch Ness Monster With... Apple Maps?

Man Claims He Found Loch Ness Monster With... Apple Maps?

Newsy (Apr. 18, 2014) — Andy Dixon showed the Daily Mail a screenshot of what he believes to be the mythical beast swimming just below the lake's surface. Video provided by Newsy
Powered by NewsLook.com
First Ever 'Female Penis' Discovered In Animal Kingdom

First Ever 'Female Penis' Discovered In Animal Kingdom

Newsy (Apr. 18, 2014) — Not only are these newly discovered bugs' sex organs reversed, but they also mate for up to 70 hours. Video provided by Newsy
Powered by NewsLook.com
Ark. Man Finds 6-Carat Diamond At State Park

Ark. Man Finds 6-Carat Diamond At State Park

Newsy (Apr. 18, 2014) — An Arkansas man has found a nearly 6.2-carat diamond, which he dubbed "The Limitless Diamond," at the Crater of Diamonds State Park. 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