Supplemental and Recycled Fiber - Rejects Handling

SKU: C-686Duration: 29 Minutes Certificate Included

Pay-per-view (PPV) format perfect for individual users.

Get immediate access to this interactive eLearning course online. Must be used within 30 days, expires 48 hours after launch.

Great for in-person classroom training or as an alternative to DVD.

Includes printable documents and Convergence Video Player for Windows systems. Content expires after 1 year.

Ideal for corporate licensing and volume users who also need administrative tracking and reporting on training.

Get this interactive eLearning course into your LMS or learn how you can leverage our LMS to deliver training to your workforce.

Need multiple courses or have lots of users? Just let us know a little more about what you need and we’ll get you some great volume pricing.

 Need help deciding? Compare delivery formats.

Course Details


Training Time: 29 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Wood fiber accounts for more than 90% of the raw material used in the production of paper and board products, and it can come from a variety of sources. These sources can be slushed virgin fiber that is produced onsite, market pulp from other pulp mills, or recycled/secondary fiber. In the "recycled" fiber category, the most difficult source to process is post-consumer waste. This fiber arrives at the mill contaminated with a variety of undesirable materials, also called rejects. In this course, we will identify the sources of rejects in a recycled fiber facility, identify the types of rejects or contaminants generated, and discuss how they are subsequently processed, or "handled."

At the end of this module, you will be able to:

  • Identify and describe the source of rejects in recycled fiber
  • List the two goals in the treatment of every recycled fiber reject stream
  • List the two major types of reject streams
  • Identify and describe two uses for flotation separation
  • Describe the importance of dewatering rejects
  • Identify and describe commonly used equipment for dewatering rejects
  • Identify and describe some of the alternatives for final reject disposal

The following key questions are answered in this module:

When recycled fiber is cleaned, regardless of the process, what two types of streams are created?
Whenever contaminants are separated from usable fiber, the good fiber stream is called the "accepts" stream, and the contaminant stream is called the "rejects" stream.

What is a ragger?
Lightweight, stringy trash migrates to the top center of vertical repulpers where it tangles together and can be continuously removed as a rope of trash by a winch called a ragger.

What is a junk trap?
Junk traps are relatively small chambers near the bottom of separation devices such as repulpers and HD centrifugal cleaners. They continuously collect high density contaminants and are periodically isolated from the process to discharge the collected reject material.

Why are reject streams dewatered?
Dewatering landfill-bound rejects saves money by reducing the weight of the material to be disposed, and dewatering boiler-bound rejects increases net energy production.

What are some types of dewatering equipment?
Rejects can be dewatered by simple gravity drainage, or on equipment such as vacuum belts, single and double belt presses or by screw presses.

Below is a transcript of the video sample provided for this module:

Heavy and dense materials such as rocks and metal work their way into a junk trap at the bottom of the repulper where they are periodically removed. The junk trap is a collection chamber with two valves. The upper valve is normally open to the repulper, while debris collects in the chamber. Periodically, the chamber is isolated from the repulper by closing the upper valve, and the lower valve is opened to release the contents. The junk trap contents may be dewatered as they are conveyed from the trap, or they may dewater in their collection bin. Due to its nature, after it gravity drains, this rejects stream has a very low percentage of moisture and fiber. The heavy trash is sent to landfill.

Use the additional resources and links below to learn more about this topic:

Customer Q&A

Ask a Question

Sorry, we're missing some information

How do I log in to watch a video that I have already paid for?

Easy! Moments after you purchase your pay-per-view (PPV) course, you'll receive an email with login details. Just click the link and log in with your user name and password and you're on your way!

I would like to have some of my employees take 5 of your driving related courses, how can i set this up?

We're in the process of making bulk purchases and purchases for multiple users easier. But for now, you can order multiple courses and just let us know who you'd like to assign courses to. With an email for each user, we can set up their training plans and make sure everyone gets the eLearning assignments they need.

How can I get your paper-making courses for free?

Well, we can't blame you for asking... And while we're a for-profit company, there are situations with students and certain educational organizations where we can help out with a selection of eLearning. However, our online courses are extremely economical. And our paper industry courses are in very high demand. So, without knowing more about your situation, we think you'll get loads of value from the $39 you'll spend on any of our premium courses.

Do you have eLearning in Portuguese?

Yes, we do! And in addition to primary English narration, we produce many courses in a growing number of languages, including Spanish, Chinese, Dutch, German, Italian, Japanese, Korean, Polish, Russian, Tamil, and Thai.

I'm unemployed, but I really like your eLearning. Do I get a certificate when I complete a course?

Yes! All of our courses allow you to print a completion certficate upon successfully passing the integrated test at the end of eLearning. In the future, we'll have badges for you to use in your LinkedIn profiles.
Added to Cart! Click here to view your cart.