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