Pulp and Paper Mills

Gain continuous control over your pulp and paper manufacturing process.

The pulp and paper industry is one of the largest industrial consumers of water, requiring 64,000 litres per ton of paper. Aside from wood fibers, water is the most important raw material in the pulp or paper mill. Simply put, pulp and paper manufacturing is impossible without water at every step of the production process—in specific tasks from pulping and bleaching to slurry dilution and fabric showers, in steam and power production for thermal and mechanical processes, as well as general operation uses such as materials transport and equipment cleaning.

Hach® offers comprehensive water analysis solutions to paper mills, including manufacturers of corrugated paper, corrugated cardboard, tissue mills, kraft mills, and non-woven manufacturers of products such as baby diapers, disinfection wipes and more. Despite the broad range of paper product applications, the entire pulp and paper industry shares two main goals when it comes to water use: conserve fresh water by reusing as much process water as possible, and treat wastewater to comply with regulations and protect local resources. To accomplish this, having reliable tools and data is key.

From laboratory analysis to process solutions, Hach’s accurate, easy-to-maintain instrumentation, comprehensive test kits and high-quality prepared reagents are based on nearly a century of innovation and a desire to provide the simplest way to results pulp and paper companies can trust.

Our products, application support and local service can help your pulp and paper mill to:

  • Maintain quality by ensuring your output meets product specifications
  • Maximise uptime of equipment and production
  • Maintain regulatory compliance with legal limit values
  • Assure process optimisation with real time control (RTC)
  • Optimise resources by minimising product loss and maximising pulp yield
  • Protect your investment via process efficiency and prolonged plant life

By partnering with Hach in process monitoring and laboratory verification, you’ll assure maximum uptime through preventative protection, risk mitigation, and superior service.



Water Supply Conditioning

Because more than 90% of water used in the paper making process is sourced from the local environment, incoming water quality, including organic content, chemistry, dissolved oxygen and flow, varies with the weather and the seasons. Confident measurement and management of fresh water enables efficient, cost-effective production of high quality pulp and paper, whereas poor or unknown water quality creates costly consequences. Real-time analysis starting at raw water intake enables pulp and paper mills to:

  • Optimise biocide/disinfectant dosage
  • Detect changes to incoming water quality and take preventive action (e.g. the addition of chlorine to minimise bacterial and slime growth)
  • Monitor plant efficiency and production performance
  • Guard against in-plant corrosion and in-plant scale
  • Check potential of non-ionic inorganics to cause in-plant deposits
  • Assure effective filtration

Parameters Relevant to Water Supply Conditioning

  • cog icon flask iconCationic Conductivity
  • cog icon flask iconDegassed Cationic Conductivity
  • cog icon flask iconHydrazine
  • cog icon flask iconLaser Turbidity / Iron Transprot
  • cog icon flask iconOxygen
  • cog icon flask iconpH
  • cog icon flask iconPhosphate
  • cog icon flask iconSilica
  • cog icon Sodium
  • cog icon flask iconTotal Organic Carbon (TOC)
  • cog icon Specific Conductivity
Pulp Paper Mill Parameters Relevant to Water Supply Conditioning
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Process solutions include online sensors that provide round-the-clock support for critical operational and process decision making.

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Laboratory solutions include simple, reliable and accurate tests that support quality and compliance decision making.

How to Measure:

  • BioTector B7000i TOC Analyser
  • BioTector B3500e TOC Analyser
  • CEL Water Conditioning Laboratory
  • Deluxe Water Conditioning Demonstration Kit
  • Pocket Colorimeter
  • CL17 Colorimetric Chlorine Analyser
  • CLF10 Free Chlorine Analyser
  • EZ1024 Iron Analyser Fe(II+III)
  • EZ1025 Manganese Analyser Mn(II)
  • EZ 2303 Total Manganese Analyser
  • EZ 2305 Total Iron Analyser
  • EZ4004 Total Alkalinity Analyser
  • EZ4041 Total Hardness Analyser
  • EZ 5001 Free Alkalinity Analyser
  • PHD sc Differential pH Sensors
  • LuminUltra ATP Test Kits
  • SP 510 Hardness Monitor
  • Solitax SC Turbidity Immersion Probes
  • SS7 sc High Range Turbidimeter
  • TU5300/400 Turbidimeters
  • 5500 sc Silica Analyser

Steam & Power

Because of the energy consumed to heat, pump and circulate water, and because of the key machinery at risk of scale and corrosion, careful analytics at this stage is a high-value priority. Additionally, because water is demineralised, treated and reused throughout the papermill, changes to parameters during steam generation have costly repercussions: boiler feed water must be purified to minimise corrosion, while treated steam condensate can be reused in the steam system. Continuous monitoring enables your operation to make informed process decisions and manage costs by:

  • Monitoring oxygen scavengers and controlling oxygen scavenger dosing to avoid corrosion as well as overdosing
  • Controlling the addition of phosphate to reduce corrosion and deposits
  • Avoiding damage to turbines and tubes caused by precipitates
  • Detecting efficiency loss in ion exchangers or membrane systems used for pre-treatment

Parameters Relevant to Steam & Power

  • cog icon flask iconCationic Conductivity
  • cog icon flask iconDegassed Cationic Conductivity
  • cog icon flask iconHydrazine
  • cog icon flask iconLaser Turbidity / Iron Transport
  • cog icon flask iconOxygen
  • cog icon flask iconpH
  • cog icon flask iconPhosphate
  • cog icon flask iconSilica
  • cog icon Sodium
  • cog icon flask iconSpecific Conductivity
  • cog icon Total Nitrogen
  • cog icon flask iconTotal Organic Carbon (TOC)
  • cog icon Total Phosphorus
Pulp Paper Mill Parameters Relevant to Steam & Power
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Process solutions include online sensors that provide round-the-clock support for critical operational and process decision making.

flask icon

Laboratory solutions include simple, reliable and accurate tests that support quality and compliance decision making.

How to Measure:

  • BioTector B7000i TOC Analyser
  • BioTector B3500e TOC Analyser
  • 8362 sc High purity pH and ORP/Redox Sensor
  • 9586 Oxygen Scavenger Analyser
  • 9523 Specific and Cationic Conductivity Analyser
  • 9525 Degassed Cationic Conductivity Analyser
  • TU5 Turbidimeter
  • NA5600sc Sodium Analyser
  • 3400 Digital Contacting Conductivity Sensors
  • 3400 Analog Contacting Conductivity Sensors
  • 5500 sc Silica Analyser
  • 5500 sc Phosphate Analyser
  • EZ1005 Chloride Analyser
  • EZ1031 Phosphate Analyser
  • EZ5005 Total Hardness + Total / Free Alkalinity Analyser
  • EZ7300 Microbial Load ATP Analyser

Paper Machine Wet End Operations Monitoring

Measuring at the approach system and at the whitewater loops of the paper machine helps ensure optimum operation to achieve the specifications of the paper pulp and paper grade produced, as well as recuperation of raw stock/energy from the saveall. Approach system and whitewater loops quality analysis enables:

  • Monitoring for optimal chemical reactions at the wet end and formation of the sheet
  • Controlling coagulant and polymer dosage
  • Online calculation of the first pass retention
  • Optimisation of the saveall operation for water, heat, chemicals, filler, and fiber recovery
  • Early detection of calcium and magnesium that shorten the life of costly equipment
  • Fast microbiology analysis to monitor biocide program efficiency

Parameters Relevant to Paper Machine Wet End Operations Monitoring

  • cog icon flask iconATP
  • cog icon flask iconFree chlorine, total chlorine
  • cog icon flask iconORP/Redox
  • cog icon flask iconpH value
  • cog icon flask iconSolids
  • cog icon Starch
  • cog icon Sulfate
  • cog icon flask iconTotal Hardness (TH)
  • cog icon Total Nitrogen
  • cog icon flask iconTotal Organic Carbon (TOC)
  • cog icon Total Phosphorus
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Pulp Paper Mill Parameters Relevant to Paper Machine Wet End Operations Monitoring
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Process solutions include online sensors that provide round-the-clock support for critical operational and process decision making.

flask icon

Laboratory solutions include simple, reliable and accurate tests that support quality and compliance decision making.

How to Measure:

  • BioTector B7000i TOC Analyser
  • BioTector B3500e TOC Analyser
  • TSS sc Sensors
  • RTC-ST Sludge Thickening Software
  • PHD pH and ORP/Redox Differential Sensors
  • LuminUltra ATP Test Kits
  • Pocket Colorimeter
  • Intellical ORP/Redox/pH Sensors

Primary & Secondary Wastewater Treatment

Because 90% of the water used in a paper mill is returned to its source, meticulous water treatment before discharge is essential. Assure pulp and paper effluent complies with regulations by monitoring and optimising primary and secondary wastewater treatment. Save energy and chemicals with real-time adjustments based on accurate data. Hach instrumentation and solutions enable:

  • Optimisation of primary/secondary clarification
  • Optimisation of flocculation and sludge dehydration process
  • Control of activated sludge retention time for foam and filamenteous protection
  • Dosage control and optimisation of nitrogen and phosphorus
  • Monitoring of the biomass “health” with ATP measurement
  • Real-time monitoring of effluent regulated parameters
  • Wastewater plant data management for analysis and automatic reporting

Parameters Relevant to Primary & Secondary Wastewater Treatment

  • cog icon flask iconAbsorbance UV
  • cog icon flask iconAmmonia
  • cog icon flask iconATP
  • cog icon flask iconBiochemical Oxygen Demand (BOD)
  • cog icon Flow
  • cog icon flask iconNitrate
  • cog icon flask iconORP/Redox
  • cog icon flask iconOxygen
  • cog icon flask iconpH value
  • cog icon flask iconPhosphorus
  • cog icon Sludge Level
  • cog icon flask iconTemperature
  • cog icon Total Nitrogen
  • cog icon flask iconTotal Organic Carbon (TOC)
  • cog icon Total Phosphorus
  • cog icon flask iconTurbidity and Total Suspended Solids (TSS)
Pulp Paper Mill Primary & Secondary Wastewater Treatment
cog icon

Process solutions include online sensors that provide round-the-clock support for critical operational and process decision making.

flask icon

Laboratory solutions include simple, reliable and accurate tests that support quality and compliance decision making.

How to Measure:

  • BioTector B7000i TOC Analyser
  • BioTector B3500e TOC Analyser
  • AMTAX sc Ammonium Analyser
  • PHOSPHAX sc Phosphate Analyser
  • Differential pH Digital Sensors
  • UVAS plus sc UV Probe Sensor
  • LDO sc Luminescent Dissolved Oxygen Sensor
  • TSSsc Turbidity and Suspended Solids Sensors
  • Solitax sc Turbidity and Suspended Solids Probes
  • Filtrax Sample filtration system
  • HQ440D Laboratory pH Meter Package
  • Grab Samplers
  • Portable Samplers
  • RTC-SD Sludge Dewatering Software
  • RTC-SRT Aeration Process Software
  • RTC-DAF Software
  • RTC-DOS Nutrient Dosing Software
  • WIMS Water Information Management Solution
  • NITRATAX Nitrate Sensors
  • LuminUltra ATP Test Kits
  • Sonatax Sludge Level Sensor
  • NX7500 UV Sensors
  • EZ1003 Ammonium Analyser
  • EZ7000 Chemical Oxygen Demand Analyser (COD, Dichromate Method)
  • EZ7200 Volatile Fatty Acids (VFA) Analyser
  • EZ7700 Total Nitrogen Analyser
  • EZ7800 Total Phosphorus Analyser
  • EZ7900 Toxicity Analyser