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.

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 September 18, 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 September 18, 2014).

Share This



More Earth & Climate News

Thursday, September 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Man Floats for 31 Hours in Gulf Waters

Man Floats for 31 Hours in Gulf Waters

AP (Sep. 16, 2014) A Texas man is lucky to be alive after he and three others floated for more than a day in the Gulf of Mexico when their boat sank during a fishing trip. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Researchers Explore Shipwrecks Off Calif. Coast

Researchers Explore Shipwrecks Off Calif. Coast

AP (Sep. 16, 2014) Federal researchers are exploring more than a dozen underwater sites where they believe ships sank in the treacherous waters west of San Francisco in the decades following the Gold Rush. (Sept. 16) 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