LEV in developing economies for slideshare
•
2 likes•4,902 views
Presentation to BOHS / OHSI Exposure Control and Containment Conference in Liverpool October 2016. Explores the challenges of designing and implementing local exhaust ventilation systems to control worker exposure to dust in developing economies
Recommended
Recommended
More Related Content
What's hot
What's hot (20)
Similar to LEV in developing economies for slideshare
Similar to LEV in developing economies for slideshare (20)
More from Mike Slater
More from Mike Slater (15)
Recently uploaded
Recently uploaded (20)
LEV in developing economies for slideshare
- 1. Challenges of Using LEV in Developing Economies Mike Slater Diamond Environmental Ltd. Chair of WHWB-UK YEARS OF OCCUPATIONAL HYGIENE
- 2. 2 Workplace Health Without Borders
- 3. There are 3 billion workers in the world… 3 Source: World Health Organization (WHO)
- 4. There are 3 billion workers in the world… Nearly 2 billion of them work in unhealthy and unsafe conditions 4 Source: World Health Organization (WHO)
- 5. 2.34 1.6 1.24 0.742 0 0.5 1 1.5 2 2.5 Occupational injuries and disease HIV/AIDS Road traffic Armed Conflict and Violence Millions of Deaths per Year Worldwide
- 7. About 150,000 workers die from respiratory disease every year
- 8. Exposure to dust is a major cause of respiratory disease including in Europe – this photo was taken in the UK Local exhaust ventilation (LEV) is a common solution to this type of problem
- 9. Unfortunately we don’t always get it right Even in Europe LEV systems are poorly designed
- 10. 10 Silica = 1.9 mg/m3 Dust exposures can be a real problem in the developing world Controls are often non-existent
- 11. 11 Challenges of designing and implementing LEV systems in developing countries
- 16. 16
- 18. 18
- 19. 19 Workplace Health Without Borders
- 20. Workplace Health Without Borders (WHWB) A non-profit international organization Registered as a charity in Canada Branches recently established in the USA and UK 20
- 21. Workplace Health Without Borders (WHWB) Engages volunteers to address workplace health issues around the world 21
- 22. A world where workers do not get sick because of their work 22 Vision
- 24. 24 Brick plant project - addressing silica and other hazards in brick plants in Nepal, Pakistan and Tanzania
- 25. 25 Provided technical assistance on sampling for silica in Pakistan brick plants
- 26. Agate Polishing in Gujarat
- 27. ▪ Produces Semi Precious stones used for jewelry and ornaments These are agate “pebbles”
- 28. ▪ Produces Semi Precious stones used for jewelry and ornaments After polishing
- 29. 29 Used to make jewellry
- 30. 30
- 31. Silica – Agate Jewelry Industry ▪ Estimated 1 million exposed in this industry ▪ Prevalence of silicosis is 20-30% (workers) and 11% in family members ▪ Elevated levels of accelerated silicosis, Tuberculosis
- 32. Resp. Dust: 0.61 mg/m3 Quartz = 0.54 mg/m3
- 33. Resp. Dust: 0.61 mg/m3 Quartz = 0.54 mg/m3
- 34. 34 Silica = 1.9 mg/m3
- 35. Project Goal • Use inexpensive, locally available materials • Low power demand
- 36. 36 Pilot system In the lab
- 37. Grinder 4” x 10” Hood 20 Litre Pail with Lid, which supports fan 200 CFM Fan @ 3/8”WG Exhaust Exhaust duct terminates ca 6” inside pail vertically
- 38. Dustrak (resp) <0.05 mg/m3 Dustrak (resp)>20 mg/m3 (exhaust)
- 39. Trial Intervention: Horizontal Wet Wheel 39 Receptor / captor hood
- 40. 40 Simple wet system to capture some of extracted dust using waste drum
- 41. 41 Pre-hood With LEV Respirable dust (mg/m3) 0.8 <0.33 Quartz (mg/m3) 0.53 0.09
- 42. Revised Design
- 44. Horizontal wet wheel #2 44
- 45. Horizontal wet wheel #2 45 Pre-intervention: quartz 3.0 mg/m3 Post-intervention: quartz 0.05 mg/m3
- 47. 47 Before After Resp. dust (mg/m3) 1.7 0.64 Quartz (mg/m3) 1.2 0.10
- 48. Dry horizontal grinder Before After Resp. dust (mg/m3) 1.9 0.4
- 49. Dry Ball Mill Respirable Dust: 36 mg/m3 , Quartz = 17 mg/m3 49
- 50. Dry Ball Mill 50 Respirable Dust: 0.51 mg/m3 , Quartz = <0.03 mg/m3
- 51. 51 Lack of funding Lack of expertise Lack of resource Availability of supplies Maintenance difficulties
- 52. 52 Thanks to Paul Bozek, University of Toronto
- 53. Learn more and get in touch! Join WHWB: www.whwb.org 53 Workplace Health Without Borders