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Get immediate access to this interactive eLearning course online. Must be used within 30 days, expires 48 hours after launch.
Language: English Portuguese
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Bleaching Series (Details)Includes 11 courses for $499/year. Pulping Library (Details)Includes 72 courses for $1,499/year.
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Training Time: 26 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Portuguese
Pulp bleaching is usually accomplished using a series of chemical treatments. The chemicals and the order in which they are used make up a "bleaching sequence." One of the main goals of bleaching is to mitigate the environmental impact it has on the environment. This course will focus on the environmental concerns associated with pulp bleaching including water and energy use, resource conservation, air emissions, and wastewater quality.
At the end of this module, you will be able to:
The following key questions are answered in this module:
What are the environmental concerns of pulp bleaching?Energy use, water use, wood use, land use, air emissions, and toxic chemicals (AOX) in the wastewater are all environmental concerns for bleaching.
What is AOX?They are harmful chemicals that are formed when chlorine containing chemicals are used for bleaching. AOX lasts a long time in the environment and accumulates in the food chain. Dioxins are a particularly toxic form of AOX that has been linked to cancer and other major health problems.
What environmental concerns exist besides AOX?BOD, COD, and color are other wastewater concerns. Air emissions need to be monitored. Minimizing water use, energy use, and wood use are also important.
What environmental regulations exist to control the release of AOX and other pollutants?The EPA established the cluster rule to regulate toxic pollutant releases to air and water from pulp mills.
How is AOX and other wastewater quality parameters such as BOD, COD, and color controlled?Wastewater quality from a bleach plant depends on the lignin content of the pulp entering the bleach p
Below is a transcript of the video sample provided for this module:
Bleaching Basics
View Course
Bleaching Equipment
Bleaching Sequences and Filtrate Recycling
Chlorine Dioxide Bleaching
Ozone Bleaching
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