Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Environmental friendly technology to remove ink stain in paper recycling

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:

More articles from Ecology, The Environment and Conservation:

nachricht Invasive Insects Cost the World Billions Per Year
04.10.2016 | University of Adelaide

nachricht Malaysia's unique freshwater mussels in danger
27.09.2016 | The University of Nottingham Malaysia Campus

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: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

How nanoscience will improve our health and lives in the coming years

27.10.2016 | Materials Sciences

OU-led team discovers rare, newborn tri-star system using ALMA

27.10.2016 | Physics and Astronomy

'Neighbor maps' reveal the genome's 3-D shape

27.10.2016 | Life Sciences

More VideoLinks >>>