Dr. Mahad Baawain - Wastewater Sludge in Oman

  • 1,180 views
Uploaded on

 

More in: Technology , Business
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
1,180
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
36
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. CHARACTERIZATION OF WASTEWATER SLUDGE IN OMAN Dr. Mahad Baawain Dept. of Civil & Arch. Eng. Sultan Qaboos University, Oman
  • 2. Project Overview Wastewater & Sludge in Muscat, Salalah & Shoar Current situation: WW collection, treatment & disposal Current situation: Sludge treatment, handling & disposal Assess effects (if any) on environment & human health Assess quality of resultant sludge & possibility of producing energy October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 3. Outline
    • Introduction
    • Objectives
    • Study area
    • Treated effluent applications
    • Basic information
    • Wastewater treatment plants
    • Sampling scheme
    • Results
    • Conclusions
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 4. Introduction
    • In Oman, wastewater treatment plants use mainly activated sludge process which results in the generation of a large amount of waste activated sludge
    • The resulted sludge from treatment plants in Oman is disposed in dumping sites
    • Interest in methods to reuse the resulted sludge instead of dumping it has been growing rapidly
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 5. Objectives
    • To characterize domestic and industrial wastewater sludge collected from different wastewater treatment plants in Oman
    • To suggest reuse options for the sludge
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 6. Study Areas October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 7. Treated Effluents Applications
    • Urban reuse (Irrigation public parks, landscapes, fire protection, etc): Muscat, Salalah
    • Agricultural reuse (Irrigation of nonfood crops), Salalah
    • Environmental reuse (Creating artificial wetlands), Muscat
    • Industrial reuse (Process water & cooling water): Muscat, Sohar, Salalah
    • Indirect Potable Reuse (Groundwater recharge), Salalah
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 8. Basic Information October 18-19, 2011 Kuwait Waste Management Conference & Exhibition WWTP Capacity (m 3 /d) TE (m 3 /d) Sludge (Ton/d) Application Al-Ansab 25,000 21,000 66 Landscaping Darsait 21,000 18,000 33 Landscaping Rusayl Ind. 1,200 800 (~2) Landscaping Rusayl Dom. 300 285 (~0.7) Landscaping Salalah STP 22,000 20,000 35.5 Recharge wells Salalah Ponds 3,000 1,500 (~3) Wadi overflow Raysut Ind. 470 150 (~0.4) Landscaping Sohar STP 8000 6600 (~15) Landscaping Sohar Ind. 700 300 (~0.8) Landscaping
  • 9. Wastewater Treatment Plants
  • 10. Sampling Scheme Chemical: Anions, Cations, Physical: (Dry solids, Organic content) Biological: Microorganisms Sludge from settling basins and drying beds per plant October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 11. Industrial Wastewater Sludge October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 12. October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 13. October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 14.
    • The average obtained values of the cations in sludge samples were within the Omani standard for the re-use of sludge in agriculture except for Cd in RSL.IE
    • By comparing the results to the typical values for metals in biosolids in United Status, all the results are within the typical range except Zn in RIE.
    • The effect of seasonal change appeared in Cr, Cu, Cd and Zn
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 15. Domestic Wastewater Sludge October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 16. October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 17.
    • The average obtained values of the cations in the sludge samples were found within the Omani standard for the re-use of sludge in agriculture except for Zn in Sohar.D.
    • By comparing the results to the typical values for metals in biosolids in United States, all the results are within the typical range except Zn in Ansab and Sohar.D.
    • The effect of seasonal change appeared at Cu, Pb, Ni and Zn
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 18. October 18-19, 2011 Kuwait Waste Management Conference & Exhibition Sample Cd Cr Cu Pb Mo Ni Zn RSL.D 0.21 11.63 302.15 343.05 2.10 66.71 448.57 DST 0.20 7.40 366.43 24.58 10.12 139.76 855.31 Ansab 0.20 1.00 596.70 71.80 14.80 129.40 2161.30 Sohar.D NA NA NA NA NA NA NA SLL.STP 0.20 1.00 173.80 30.56 6.80 80.48 704.48 Overall average 0.20 5.26 359.77 117.50 8.46 104.09 1042.41
  • 19. Conclusions
    • Values of pH 5.8 to 8.0 for industrial sludge and 6.0 to 7.8 for domestic sludge
    • Most of EC results of industrial sludge were below 1000 µS/cm except that for RIE.
    • The range of VC in RAS samples was 44 to 86 % in industrial STPs compared with 49.5 to 84.3 % in domestic STPs
    • Both industrial & domestic STPs show low Fluoride and Bromide concentrations
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 20. Conclusions
    • Overall average of Nitrite in domestic STPs was higher than industrial STPs
    • Overall average of Nitrate in industrial STPs was higher than domestic STPs.
    • Industrial & domestic STPs Chloride, Sulfate & Phosphate higher than other anions
    • Average cations concentrations were within the Omani standard for the re-use of sludge in agriculture except for Cd in RSL.IE.
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 21. Acknowledgments
    • Financial support by Sultan Qaboos Univ.
    • Ministry of Regional Municipalities and Water Resources
    • Minsitry of Environment and Climate Affairs
    • Haya Water, Salalah Sanitary Drainage Services, & Industrial Estates
    • Technical staff at environmental eng. labs
    • Postgrad & undergrad students for their effort and enthusiasm during this project
    October 18-19, 2011 Kuwait Waste Management Conference & Exhibition
  • 22. THANK YOU… October 18-19, 2011 Kuwait Waste Management Conference & Exhibition