Tuesday, 3 September 2013

SCIENCE FAIR PROJECT - PAPER RECYCLING - By Cristina Romero - E1B

Paper recycling is a process used to transform used paper into new paper. There are three categories of paper that can be used as raw material for recycled paper: ground, waste pre-consumer and post-consumer waste. Any writing or colouring on the paper must first be removed by bleaching.The paper clippings, and pieces of already manufactured paper are milled. A pulp is made which is sometimes combined with new pulp from wood. This is added because each time paper is recycled its quality decreases. New wood fibers are added to keep the quality of the paper good. The higher the percentage of new fibers, the higher the quality. The same the opposite. 

Some reasons for recycling paper are saving:

It is estimated that recycling half the world's paper would avoid the harvesting of 20 million acres (81,000 km²) of forest.

In these photos you can see me recycling paper with the help of my teacher and preparing my stand for the science fair.


Paper cuttings in one bowl and paper pulp in the other.



A screen is used to take a thin layer of pulp and to filter the water.

Sheet of paper left to drain off the excess water

Sheet of recycled paper left to dry.


Panel preparation

Science fair stand

Post a Comment