Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Environmental friendly technology to remove ink stain in paper recycling

01.09.2008
The greatest challenge in paper recycling is removal of polymeric ink and coating; and the most difficult paper is mixed office wastepaper.

Traditional deinking 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 deinking is the mixed office wastepaper especially the papers that had gone through photocopiers and laser printers.

Traditional deinking 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 deinking processes.

Enzymatic treatment can achieve similar effect as chemical treatment. It can even improve the deinking 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 deinking 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 deinking 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)

Resni Mona | ResearchSEA
Further information:
http://www.unimas.my
http://www.researchsea.com

More articles from Ecology, The Environment and Conservation:

nachricht When corals eat plastics
24.05.2018 | Justus-Liebig-Universität Gießen

nachricht Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>