The document summarizes Engineers Without Borders' (EWB) current project to supplement the potable and non-potable water systems at a local school in Ilha Das Peças, Brazil. The project aims to increase the water supply through rainwater collection and purification of potable water, while also reducing potable water demand by providing a separate non-potable water source for uses like toilet flushing and irrigation. The upgrades will physically separate the potable and non-potable systems and include installing additional water storage tanks, drilling a new well, and improving water disinfection and filtration processes. Upon completion, the improved water systems aim to provide a more reliable water supply to support the 120 students and teachers at the school

1. Engineers Without Borders University of Maryland Ilha Das Peças Brazil

3. EWB-UMCP 4 trips to the island, 2 projects implemented

4. Current project: Supplement potable and non-potable water to local school1

5. Past Projects 30,000 L Reservoir Septic System Constructed Wetland Grease Trap 2

9. 120 Students

10. Receives insufficient potable water4

12. Large

13. Small in attic

14. Municipal water supplied to large tank

15. Pump in kitchen transfer water from large tank to small tank in attic

16. Water gravity fed to existing toilets, sink, water fountain and kitchenFront view Large Tank Back view Kitchen 5

17. Existing Infrastructure Existing Kitchen Sink Existing Attic Tank Existing Piping in School Existing Bathrooms Existing Sink and Fountain Municipal water supplies kitchen, bathrooms, and fountain with potable water 6

19. Piping in school changed

20. Controllable loop reverts back to original water flow 7

22. Purify potable water

23. Reduce potable water demand with non-potable water source

24. Separate potable/non-potable systems8

25. Potable Water 9

27. 1.3 mm First Flush

28. 71 % Contamination Removal

29. Flow controlled by float valves10

30. Potable Water – Water Preference 11

31. Potable Water – Disinfection EPA Purification Requirements for Surface Water 12

32. Potable Water - Disinfection Pre-Storage Filtration Point of Use Sterilization Pentek 5 Micron Sediment Filter Pentek 0.5 Micron Carbon Block Filter Filtros & Filtros UV Purifier Main Storage Tank Sinks and Drinking Fountain Potable Water Attic Tank 13

33. Proposed System Potable Water Roof 500 L Attic tank 500 L Attic tank Gutters Overflow Overflow Physical Separation Between Water Systems New Pump Large Tank Well Head Constructed Wetlands Municipal Water Source Non Potable Water 14

34. Non-Potable Water Overflow New 500 L Attic tank New Attic Tank Valve Coupling Pump Controller New Pump Constructed Wetlands Well Head 15

35. Non-Potable Water – Drilling Well Madalena, Community Well Builder 16

36. Non-Potable Water Construction Process – Jetting: 17

37. Non-Potable Water Proposed Well Design Check Valve 300 ft. Pump Sand Geotextile 18

38. Non-Potable Water Operating point 4.2 m3/hr, Tank Fills in under 10 Min Sufficient Net Positive suction head to mitigate cavitation 19

39. Float Switch Fill Control System 20

40. Float Switch Fill Control System 20

41. Float Switch Fill Control System 20

42. Float Switch Fill Control System 20

43. Electrical and Control System Existing Breaker Box Empty Breaker Slot Main Switch Breaker Box Located Behind Kitchen Door 21

45. 100% Materials Sourced in Country

46. Material Transportation to be Provided by School

47. Maintenance Fund Established by School

48. Education and Training Plan to be Provided to School22

49. Thank You! QUESTIONS? 23