Featured Research

from universities, journals, and other organizations

Environmental Friendly Technology Can Remove Ink Stains In Paper Recycling

Date:
September 1, 2008
Source:
Universiti Malaysia Sarawak
Summary:
The greatest challenge in paper recycling is removal of polymeric ink and coating; and the most difficult paper is mixed office wastepaper. Traditional de-inking processes involve large quantities of chemicals which are expensive and unfriendly to the environment. A better alternative would be a technology that involves biological intervention.

The greatest challenge in paper recycling is removal of polymeric ink and coating; and the most difficult paper is mixed office wastepaper. Traditional de-inking processes involve large quantities of chemicals which are expensive and unfriendly to the environment. A better alternative would be a technology that involves biological intervention.

Related Articles


The greatest challenge in paper recycling is removal of polymeric ink and coating. It was suggested that the most difficult raw material for de-inking is the mixed office wastepaper especially the papers that had gone through photocopiers and laser printers.

Traditional de-inking processes involve the use of large quantities of chemicals. Not only is this expensive, it causes pollution to the environment due to the excessive use of chemicals. Environmental friendly technology that exploits enzymes (biological molecules) potential has been the focus of many researches that look for lower operational cost and minimal environmental impact in paper de-inking processes.

Enzymatic treatment can achieve similar effect as chemical treatment. It can even improve the de-inking results without affecting the physical properties in the final paper product. Application of enzyme stable in alkaline environment has been shown in other research to be effective in increasing the brightness and reduced the ink counts of recycled paper.

A research project conducted by Universiti Malaysia Sarawak and Sarawak Forestry Corporation reported the use of a crude enzyme preparation for the enzymatic de-inking of mixed office paper. The enzyme material was prepared by growing endoglucanase (enzyme use for the enzymatic treatment) producing Bacillus licheniformis BL-P7 in a liquid culture media containing sago pith waste and rice husk.

The enzymatic effect was compared to the conventional chemical treatment. The enzymatic de-inking process was reported to produce better deinking effects on the mixed office paper compared to conventional chemical methods. Ink detachment from the paper fibre was facilitated by the enzymatic modification of the fibre surfaces. Furthermore, the process proved to be more effective for the removal of larger ink particles. Also, properties such as brightness, air permeability, tensile, and tear were enhanced in the handsheets preparation of the recycled mixed office paper.

Researchers : Hashimatul F.H., Hairul A.R., Andrew Wong H.H., Awg A.Sallehin A.H. (all of Universiti Malaysia Sarawak), Nigel Lim P.T. (Sarawak Forestry Corporation)


Story Source:

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


Cite This Page:

Universiti Malaysia Sarawak. "Environmental Friendly Technology Can Remove Ink Stains In Paper Recycling." ScienceDaily. ScienceDaily, 1 September 2008. <www.sciencedaily.com/releases/2008/08/080830160034.htm>.
Universiti Malaysia Sarawak. (2008, September 1). Environmental Friendly Technology Can Remove Ink Stains In Paper Recycling. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2008/08/080830160034.htm
Universiti Malaysia Sarawak. "Environmental Friendly Technology Can Remove Ink Stains In Paper Recycling." ScienceDaily. www.sciencedaily.com/releases/2008/08/080830160034.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Scientists Find Invisible Space Shield Protecting Earth

Scientists Find Invisible Space Shield Protecting Earth

Newsy (Nov. 27, 2014) — An invisible barrier is keeping dangerous super fast electrons from interfering with our atmosphere, but scientists aren't entirely sure how. Video provided by Newsy
Powered by NewsLook.com
Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Reuters - Innovations Video Online (Nov. 26, 2014) — Innovative recycling project in La Paz separates city waste and converts plastic garbage into school furniture made from 'plastiwood'. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Blu-Ray Discs Getting Second Run As Solar Panels

Blu-Ray Discs Getting Second Run As Solar Panels

Newsy (Nov. 26, 2014) — Researchers at Northwestern University are repurposing Blu-ray movies for better solar panel technology thanks to the discs' internal structures. Video provided by Newsy
Powered by NewsLook.com
Antarctic Sea Ice Mystery Thickens... Literally

Antarctic Sea Ice Mystery Thickens... Literally

Newsy (Nov. 25, 2014) — Antarctic sea ice isn't only expanding, it's thicker than previously thought, and scientists aren't sure exactly why. 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:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

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