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University of MarylandIlha Das Peças
Brazil
Ilha das Peças, Brazil
• Location: Ilha das Peças, Brazil
• EWB-UMCP 4 trips to the island, 2 projects implemented
• Current project: Supplement potable and non-potable water to local school 1
Past Projects
2
30,000 L Reservoir
Constructed Wetland
Septic System
Grease Trap
Current Problems
• Ground Water Contamination
• Shortage of water disrupts the
operation of the local school
• No water, dry CWT 3
Local School
• Two teachers: Fernando and Adriana
• 120 Students• Receives insufficient
potable water
4
Existing Infrastructure
• Two existing tanks• Large• Small in attic
• Municipal water supplied to large tank
• Pump in kitchen transfer water from large tank to small tank in attic
• Water gravity fed to existing toilets, sink, water fountain and kitchen
Large Tank
Kitchen
5
Front view
Back view
Existing Infrastructure
Municipal water supplies kitchen, bathrooms, and fountain with potable water
6
Existing Piping in School
Existing Attic Tank
Existing Sink and Fountain
Existing Bathrooms
Existing Kitchen Sink
Proposed Addition to System
• Potable water physically separated from non potable water
• Piping in school changed• Controllable loop reverts back to original
water flow
7
Existing Attic Tank for Potable Water
Potable Tank Overflow
Non-Potable Tank Overflow
Proposed Attic Tank for Non-Potable Water
Proposed Piping for Non-Potable Water
Water Direction can be Reverted
Existing Large Tank
Proposed System
Potable Water
Non Potable Water
• Increase water supply with rain water• Purify potable water• Reduce potable water demand with non-potable water source• Separate potable/non-potable systems
8
500 L Attic tank 500 L Attic tank
New Pump
Well Head
Overflow
Physical Separation Between Water Systems
Constructed Wetlands
Overflow
Municipal Water Source
Large Tank
RoofGutters
Potable Water
9
Potable Water – First Flush
• 500 Liter First Flush Tank• 1.3 mm First Flush• 71 % Contamination
Removal• Flow controlled by float
valves
10
Potable Water – Water Preference
11
Potable Water – DisinfectionEPA Purification Requirements for Surface
WaterViruses 99.99% Removal
Bacteria 99.9% Removal
12
Main Stora
ge Tank
Point of Use Sterilization
Potable Water - Disinfection
Pentek 5 Micron
Sediment Filter
Pentek 0.5 Micron
Carbon Block Filter
Filtros & Filtros UV
Purifier
Pre-Storage Filtration
Potable Water Attic
Tank
Sinks and
Drinking
Fountain
13
Proposed System
Potable Water
Non Potable Water
14
500 L Attic tank 500 L Attic tank
New Pump
Well Head
Overflow
Physical Separation Between Water Systems
Constructed Wetlands
Overflow
Municipal Water Source
Large Tank
RoofGutters
Non-Potable Water
15
New 500 L Attic tank
Pump Controller
New Pump
Well Head
Overflow
New Attic TankValve
Coupling
Constructed Wetlands
Non-Potable Water – Drilling WellMadalena, Community Well Builder
16
Non-Potable WaterConstruction Process – Jetting:
17
Non-Potable WaterProposed Well Design
18
300 ft.
Pump
Geotextile
Sand
Check Valve
Non-Potable Water
1 1.5 2 2.5 3 3.5 4 4.5 5 5.50
2
4
6
8
10
12
14
16
Dancor Serie AAE PumpDancor Serie AAEPolynomial (Dancor Serie AAE)System CurvePolynomial (System Curve)
Q (m^3/hr)
Head (m)
Operating point
4.2 m3/hr, Tank Fills in under 10 MinSufficient Net Positive suction
head to mitigate cavitation19
Float Switch Fill Control System
20
Float Switch Fill Control System
20
Float Switch Fill Control System
20
Float Switch Fill Control System
20
Electrical and Control System
21
Existing Breaker Box
Empty Breaker Slot
Breaker Box Located Behind Kitchen Door
Main Switch
Summary
22
• Implementation Dates: August 1st to August 18th
• 100% Materials Sourced in Country
• Material Transportation to be Provided by School
• Maintenance Fund Established by School
• Education and Training Plan to be Provided to School
Thank You!
QUESTIONS?
23