CH#972 - Pulp and Paper Processing


Courtesy of Bio-Systems International

Waste Type: Toxic loadings from a Canadian Pulp and Paper mill.

Problem: A Canadian paper mill was having problems due to toxic loadings in an already overloaded system. Among other problems, the plant was plagued with poor settleability and high suspended solids.

Treatment: Initially, BIO-SYSTEM'S product, in dry powdered form, was added on June 23rd with daily maintenance dosages thereafter. Noticeable improvement was charted on July 26th - only four weeks later - and continued through September, when the trial period was over.

The product was added direct to the once through lagoon system without the use of a pre-acclimatization device.

Results: The results speak for themselves. We received the letter on the right shortly after the trial was completed!

  • Improve BOD and TSS in effluent!
  • Increase efficiency of overloaded systems!
  • Accelerates degradation of unpleasant odors associated with handling pulp and paper wastes!
  • Reseeds after plant upset!

'....Throughout 2000 the mill suffered from elevated TSS discharges due to an overloaded ASB treatment system. This problem was more pronounced during the winter months when treatment efficiencies dropped off due to lower temperatures. However, as the summer wore on, we did not experience the improvement usually expected in the warmer period. Consequently, as a diligent approach to resolving the issue, we researched biological treatment technologies and made a decision to proceed with the supplementation of our ASB with BIO-SYSTEMS products. This strategy was initiated to remain compliant with the regulated TSS limits while the existing treatment system was being physically upgraded.

Dosage of the product commenced on June 23, 2000 and continued with a daily maintenance dose until September 1, 2000. Supplier and consultants advised that the benefits of the augmentation would be realized within 3 - 4 weeks. A noticeable improvement was observed by about July 26th, 2000. This continued for the duration of the augmentation program with the occasional spike of TSS, the causes of which were undetermined.

The program ended with the exhaustion of the product supply on September, 2000. The supplementation was not continued due to the pending start-up of the upgraded effluent system, although it appears that the trend for TSS discharges was moving back up just prior to the new basins coming on line September 21st. With this in mind, I believe it is fair to say that the BIO-SYSTEMS program was a beneficial short-term solution for our mill in lowering TSS discharges until the commissioning of the newly expanded treatment system. I thank you for your assistance in helping us to initiate a successful strategy in response to a significant environmental issue.'

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