Digester operator
Also known as: pulp mill machine technician, digester specialist, digester worker, pulp mill specialist, pulp mill technician, pulp mill machine specialist
About this occupation
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.
Essential skills and knowledge
- types of paper
- work safely with machines
- operate digester machine
- concentrate pulp slurry
- monitor pulp quality
- types of wood
- troubleshoot
- supply machine
- types of digesters
- monitor automated machines
- set up the controller of a machine
- wash fibres
Typical tasks and preparation
From the related US occupation profile Separating, Filtering, Clarifying, Precipitating, and Still Machine Setters, Operators, and Tenders (O*NET 51-9012.00). Linked by an official crosswalk: related, not identical; details vary by country.
- Monitor material flow or instruments, such as temperature or pressure gauges, indicators, or meters, to ensure optimal processing conditions.
- Inspect machines or equipment for hazards, operating efficiency, malfunctions, wear, or leaks.
- Set up or adjust machine controls to regulate conditions such as material flow, temperature, or pressure.
- Collect samples of materials or products for laboratory analysis.
- Operate machines to process materials in compliance with applicable safety, energy, or environmental regulations.
- Test samples to determine viscosity, acidity, specific gravity, or degree of concentration, using test equipment such as viscometers, pH meters, or hydrometers.
- Preparation
- Job Zone 2 of 5
- Interests
- Realistic, Conventional, Investigative
Top skills: Operations Monitoring, Critical Thinking, Monitoring, Operation and Control, Quality Control Analysis, Reading Comprehension
US median pay: US$51,610 a year (2025), 60,100 employed. Source: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics.
Subjects this work relies on
How important each subject's knowledge is in the job itself, rated by people doing it (1 to 5).
- English or Literature in EnglishO*NET: English LanguageVery important (3.5)
- Agriculture or Foods and NutritionO*NET: Food ProductionVery important (3.5)
- MetalworkO*NET: MechanicalImportant (3.4)
- Mathematics or StatisticsO*NET: MathematicsImportant (3.3)
- ChemistryO*NET: ChemistryImportant (3.1)
O*NET data describe work in the United States; requirements differ by country. This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET is a trademark of USDOL/ETA. CareerProof Global has modified all or some of this information; USDOL/ETA has not approved, endorsed, or tested these modifications.
Preparation needed
Job Zone 1-2: Very Little to Some Preparation Needed
- Education
- Usually requires a high school diploma or GED, though some occupations may not.
- Experience
- Some occupations may need little or no previous experience; others require several months to a year of experience. For example, landscaping and groundskeeping workers might require very little training or previous experience, while agricultural equipment operators can benefit from on-the job training.
- Training
- Ranges from a few days to one year of on-the-job training.
O*NET data describe work in the United States; requirements differ by country. This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET is a trademark of USDOL/ETA. CareerProof Global has modified all or some of this information; USDOL/ETA has not approved, endorsed, or tested these modifications.
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O*NET data describe work in the United States; requirements differ by country. This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET is a trademark of USDOL/ETA. CareerProof Global has modified all or some of this information; USDOL/ETA has not approved, endorsed, or tested these modifications.