In this study we report the deinking of printed paper using microorganisms isolated from oil contaminated soil. The microorganisms producing lipase and esterase enzymes were screened using tributyrin agar. Deinking of the pulp was carried out using screened microorganisms and the preliminary identification of the microorganism that showed effective deinking was carried out by biochemical tests ...

The present work deals with the development of solid state fermenter for enzymes production and the development of a pilot scale of enzymatic deinking system. The newly developed solid state fermenter, was named FERMSOSTAT®, which was used for the production of cellulases and xylanase using a local isolate; Aspergillus niger USM AI 1. Optimization of enzymes production was carried out and the o...

The objective of this research was to evaluate new types of surfactants based on renewable materials (sugar and protein-based surfactants) for use in ink removal from recycled paper via flotation deinking. By applying green chemistry approaches we aim to minimize the environmental impact of deinking agents and also to open an avenue for a number of products that are to be generated from the uti...

Recycled fiber use introduces fines, fillers, microbiological contaminants and stickies contaminants to the papermaking system. Deinking processes are designed to remove or control these contaminants. Important considerations in selecting a deinking processes are the type of wastepaper to be deinked and the desired quality of the deinked pulp. These will determine the extent to which contaminan...

mixed office waste papers are considered as a large source of high quality papers that were printed with non impact printing methods. this papers have involved and economical problem in deinking with conventional chemical methods. in this research enzymatic deinking was done as an alternative for conventional chemical method. enzymatic deinking of xerox machine printed papers with cellulase fro...

Endoglucanase and lipase showed good deinking efficiency for waste papers. The performances could be greatly improved further by the combined use of the two enzymes. To reduce the enzyme production cost and enhance synergistic action of endoglucanase and lipase on laser-printed paper and newspaper, a chimeric enzyme with endoglucanase and lipase activity was constructed and expressed in Pichia ...

The stickies content, both macrostickies and stickies extractable in a solvent, was determined for samples taken at short time intervals from deinking lines, producing deinked pulp for newsprint production. The study was carried out at three mills on different continents, with each having a different source of recycled paper as raw material. The short-term variations in extractable stickies in ...