QLK5-2000-00749 Reduction of detrimental substances in papermaking

Contacts
Summary Information



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Paper/Pulp : Quality of Life - 5.3.2 The Forestry-Wood Chain

Contract No:	QLK5-2000-00749
Source:	Progress Report - February 2002 - Abstract

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Progress Report - February 2002 - Abstract

Objectives

The objectives of this project are:

• to characterise detrimental substances originating from fibrous materials. Based on the data obtained, to elaborate strategies to control anionic trash using suitable inorganic and organic chemicals
• to develop new chemicals, mainly based on inorganic compounds, for optimum efficiency in trash reduction. Appropriate dosage conditions will be worked out and methods developed to assess their efficiency
• to improve the performance of paper and board production processes, as new techniques result in an increasing closure of loops within the paper machine systems
• to develop new diagnostic systems for determination of detrimental substances by optimisation of available systems for each of the production processes and to establish the influence of process conditions.

Results and Milestones

The aims of the project are to:

• characterise detrimental substances and white-waters in paper mills
• develop modified minerals, organic polymers and aluminium compounds for use as paper processing chemicals and identify the most effective chemicals for use in pilot trials and assess their efficiency in use
• develop effective diagnostic and analytical system for use in paper mills.

Benefits and Beneficiaries

In the papermaking process, chemical manufacturing aids are used in addition to the fibres and fillers that make up the bulk of the paper. Reduced process performance and serious production failures are caused by neutralisation reactions between these manufacturing aids and detrimental anionic substances occurring as pollutants. This can result in deposits on machine parts, specks in the paper, machine downtimes owing to web breaks as well as increased chemical consumption and higher effluent loads. These effects increase the costs of paper and board production and increase the environmental impacts of the process. In addition, these contaminants can increase energy consumption.

The project is expected to provide solutions for more effective control of these detrimental substances, which originate primarily from fibrous materials in the papermaking process. When implemented the proposed measures are expected to reduce production costs and make an important contribution to consistent product quality.