Profession digester operator

Digester operators, or cooks, cook wood chips with soda ash or acid to separate the wood pulp from unwanted constituents. They test the resulting solution.

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Personality Type

  • Realistic / Conventional

Knowledge

  • Types of paper

    The different criteria used to determine differences in paper types such as coarseness and thickness, and the different fabrication methods and wood types from which the types of paper stem.

  • Types of wood

    Types of wood, such as birch, pine, poplar, mahogany, maple and tulipwood.

  • Types of pulp

    Kinds of pulp are distinguished based on their fibre type and the specific chemical processes through which they were created.

  • Types of digesters

    This includes the stationary and rotary steam digesters, which cook wood chips in an acid solution to make pulp for use in the manufacture of paper.

Skills

  • Operate digester machine

    Add cooking chemicals and steam to dissolve lignin and separate the plant fibres, breaking down wood chips to recover pulp after a bleaching and drying process.

  • Work safely with machines

    Check and safely operate machines and equipment required for your work according to manuals and instructions.

  • Monitor pulp quality

    Avoid lesser quality and lower grades of recycled paper and pulp by keeping an eye open for stickies, plastics, colour, unbleached fibres, brightness, and dirt.

  • Concentrate pulp slurry

    Measure the weight and concentration of the pulp slurry for further processing and storage by using disk filters and calculating slurry density with specific formulas.

  • Wash fibres

    Remove the chemical solution of the digesting process, making paper pulp soft and fibrous.

Optional knowledge and skills

dispose of non-hazardous waste operate debarking machine tend bleacher record production data for quality control report defective manufacturing materials dispose of hazardous waste prepare production reports monitor chipper machine test paper production samples deinking processes types of bleach keep records of work progress use deinking chemicals consult technical resources monitor chemical process condition carry out waste water treatment drive chipper truck operate wood chipper monitor gauge clean equipment perform machine maintenance check quality of raw materials