Stabilized Biosolids for Quarry
Reclamation – Demonstration
Project – Graymont Perspective
Graymont Marketing Group


                                 Outline
Graymont Project Drivers
Biosolids Research Project
...
Graymont Project Drivers
Graymont Marketing Group



             Graymont Project Drivers
 Two rotary kilns at Graymont’s
  Exshaw plant produce ...
Graymont Marketing Group



What is Lime Kiln Dust?

                           Limestone
                           Qui...
Biosolids Research Project
Graymont Marketing Group


  Biosolids Research Project
Technical Review
Laboratory Studies
Deadman’s Flat Field
 Trial...
Technical Review
Graymont Marketing Group



      Alkaline Stabilization Process
 Established technology
 Simple process with low
  capi...
Graymont Marketing Group

 Two Types of Biosolids Defined with Respect to
              Pathogen Reduction
 Class A (No D...
Graymont Marketing Group


                   Canadian Standards
 No comparable Canadian Standard for the classification ...
Graymont Marketing Group


                         Research Focus
 Focus on meeting Class A stabilized biosolids criteri...
Laboratory Studies
Graymont Marketing Group


            Laboratory Scale Testing
 Performed by Norwest (Exova)                            ...
Deadman’s Flats Field Trial
Graymont Marketing Group


         Deadman’s Flats Pilot Plant Trial

 Cooperative effort with MD
  Bighorn. Banff and C...
Graymont Marketing Group


        Deadman’s Flats Pilot Trial
 Temperature, percent solids
  and pH goals met.
 Test re...
University of Alberta Greenhouse Study
Graymont Marketing Group


      University of Alberta Greenhouse Study

 Dr Anne Naeth coordinated project
 Stabilized ...
Graymont Marketing Group


Comparison of control versus 50/50 blend




  Wheatgrass (Agtra)
                             ...
Exshaw Quarry Reclamation
Project
Graymont Marketing Group


Study Design
 Based on a meeting with Alberta Environment and Sustainable
  Resource Developme...
Graymont Marketing Group


                         Gap Quarry




23
Graymont Marketing Group




          Questions?
Upcoming SlideShare
Loading in …5
×

Stabilized Biosolids for Quarry Reclamation

1,570 views

Published on

Stabilized Biosolids for Quarry Reclamation – Demonstration Project – Graymont Perspective

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,570
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Stabilized Biosolids for Quarry Reclamation

  1. 1. Stabilized Biosolids for Quarry Reclamation – Demonstration Project – Graymont Perspective
  2. 2. Graymont Marketing Group Outline Graymont Project Drivers Biosolids Research Project - Technical Review - Laboratory Study - Deadman’s Flats Field Trail - University of Alberta Greenhouse Study - Quarry Reclamation
  3. 3. Graymont Project Drivers
  4. 4. Graymont Marketing Group Graymont Project Drivers  Two rotary kilns at Graymont’s Exshaw plant produce approximately 7,000 tonnes of dry LKD per year.  Though some of this product is beneficially used, some still must be sent to a local landfill for disposal.  Dry LKD is a good product for this application and there would be steady demand.  Graymont quarry sites require soil for reclamation which is in limited supply.  The opportunity exists to create a sustainable solution not only for Graymont but also for the region in which our employees live.
  5. 5. Graymont Marketing Group What is Lime Kiln Dust? Limestone Quicklime (Calcium Oxide) Fly Ash
  6. 6. Biosolids Research Project
  7. 7. Graymont Marketing Group Biosolids Research Project Technical Review Laboratory Studies Deadman’s Flat Field Trial University of Alberta Growth Trials Quarry Reclamation Trials
  8. 8. Technical Review
  9. 9. Graymont Marketing Group Alkaline Stabilization Process  Established technology  Simple process with low capital costs  Small plant footprint  Easy to operate  Alkaline treatment dilutes and fixates metals  Multiple End Uses  Over 40 facilities in the US and Canada
  10. 10. Graymont Marketing Group Two Types of Biosolids Defined with Respect to Pathogen Reduction  Class A (No Detectable Pathogens) - Not subject to use restrictions and can be generally used like any fertilizer.  Class B (A Reduced Level of Pathogens) - Subject to additional requirements including limiting public access to the site of application, limiting livestock grazing, and controlling crop harvesting schedules.
  11. 11. Graymont Marketing Group Canadian Standards  No comparable Canadian Standard for the classification of biosolids treated with lime.  The Canadian Council of the Ministry of the Environment (CCME) does have processing criteria for compost. Two types of composts are defined by this standard (Class A and Class B). These composts must meet standards for metal concentrations and pathogen reduction.  Alberta Environment also has standards for the land application of sewage sludge to agricultural land.  Canadian Food Inspection Agency (CFIA) regulates liming materials under the Fertilizers Act and Regulations.
  12. 12. Graymont Marketing Group Research Focus  Focus on meeting Class A stabilized biosolids criteria  Based on USEPA Standards for the Use or Disposal of Sewage Sludge (Title 40, Part 503)  Pathogen Reduction Requirements (Section 503.32 4)(ii)) - The pH of the sewage sludge must be over 12 for 72 hours. - The temperature of the sewage sludge must be above 52 oC for 12 hours or longer during the period when the pH is above 12. - At the end of the 72 hour period, the sewage sludge should have a percent solids above 50%.  Vector Attraction Reduction (Section 503.33 (b)(6)) - The pH of sewage sludge must remain at 12 or higher for two hours and then at 11.5 or higher for an additional 22 hours.  Must be below the ceiling concentrations for metals in Section 503.13  The parameters required for Alberta land application, compost classification and liming materials were also measured.
  13. 13. Laboratory Studies
  14. 14. Graymont Marketing Group Laboratory Scale Testing  Performed by Norwest (Exova) 80:20 Mix Temperature Profile Laboratories in Edmonton. 80  Initial trial of 60% sludge to 70 40% LKD resulted in a mixture temperature of over 100 oC. 60  The second trail of a blend of Temperature (oC) 50 80% Sludge and 20% LKD 40 provided a more moderate 30 temperature increase and kept the pH over 12 for 72 hours. 20  Blend of 70% Sludge and 30% 10 LKD in a small open pile 0 maintained pH but not 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 temperature. Time (Hours)
  15. 15. Deadman’s Flats Field Trial
  16. 16. Graymont Marketing Group Deadman’s Flats Pilot Plant Trial  Cooperative effort with MD Bighorn. Banff and Canmore biosolids were studied.  Simple process  Volumetric feed (Approximately 40% by weight LKD)  Separate buckets used for loading mixer and moving the stabilized products to storage.
  17. 17. Graymont Marketing Group Deadman’s Flats Pilot Trial  Temperature, percent solids and pH goals met.  Test results at 72 hours showed that Fecal Coliform and Salmonella levels were below detection level for all samples tested.  Heavy metals levels for the stabilized biosolids met Class A compost requirements with the exception of selenium.
  18. 18. University of Alberta Greenhouse Study
  19. 19. Graymont Marketing Group University of Alberta Greenhouse Study  Dr Anne Naeth coordinated project  Stabilized biosolids from the Dead Man’s Flats trials used  Focus on the growth of three native species - Two grasses (Wheat grass and fescue) - Forb (American vetch)  Four concentrations of biosolids - 100%, 75%, 50%, 0%  90 day growth period completed in October 2009
  20. 20. Graymont Marketing Group Comparison of control versus 50/50 blend Wheatgrass (Agtra) Fescue (Fessax) American Vetch (Vicame)
  21. 21. Exshaw Quarry Reclamation Project
  22. 22. Graymont Marketing Group Study Design  Based on a meeting with Alberta Environment and Sustainable Resource Development (SRD), a follow-up study is being developed which will examine the use of stabilized biosolids as a soil amendment in the reclamation of the Graymont’s Gap Quarry  The study will be coordinated by Anne Naeth of the University of Alberta  The design of this study is currently under development and should be presented to Alberta Environment and SRD for their approval in May 22
  23. 23. Graymont Marketing Group Gap Quarry 23
  24. 24. Graymont Marketing Group Questions?

×