Transcript Design of a Wastewater Treatment Plant for the

Conceptual Design of a
Wastewater Treatment Plant
for the Municipality of Cotorro,
Province of Havana, CUBA
2009 Association for the Study of the Cuban Economy
Conference
Karen Kajder
University of Miami, BSENV, ‘09
Outline

Background on
Cotorro wastewater
system

Current wastewater
system plans in
Cotorro

Proposed solution
to treat Cotorro’s
wastewater

Cost Analysis

Conclusion
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CARIBBEAN SEA
COJIMAR
BAY
LEGEND
WASTEWATER
TREATMENT SYSTEM

Almendares
River provides
water source
for Havana
FACTORIES & PLANTS
HOSPITAL
CHORRERA
COVE
Beer
Factory
Ice
Factory
Baby Food
Factory
HAVANA
HARBOR
Pump
Replacement
Parts Factory
Beer
Drink
Factory
Factory
Textile
Factory
Paper Mill
Tire
Puentes
Factory
Gas Grandes
Plant WWTP
Metallurgy
Plant
PITIRRE
RESERVOIR
Bird
Slaughter
House

Sources of
contamination
Calle100
Landfill
Maria del
Carmen
WWTP
MARIA DEL
CARMEN
TRIBUTARY
Cotorro
WWTP
Hospital
VENTO-ALMENDARES
WATERSHED BOUNDARY
Hospital
Plastics
Factory
Building Material
Factory
Ice Cream
Factory
Cristal River
Touristic
Center
TOWN OF
CALABAZAR
San Pedro
Pump Station
Unknown
Factory
Metal
Smelter
EJERCITO REBELDE
RESERVOIR
PASO SEQUITO
RESERVOIR
SAN FRANCISCO
TRIBUTARY
Unknown
Factory LA CATALINA
TRIBUTARY
Unknown
Factory
JIBARO
TRIBUTARY
TOWN OF COTORRO
Beer
Factory
Unknown Water
Treatment Facility
ALMENDARES
RIVER
GUADIANA
TRIBUTARY
Almendares Watershed
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




Population: ~74,500
Population connected to sewer collection
system: ~20,000
Cotorro’s domestic wastewater is currently
being discharged into upper tributaries of
the Almendares River- untreated
Vento Aquifer provides about 50% of the
potable water for Havana
In-operable pump station: wiring and
control panels need to be repaired
Background: Cotorro, Cuba
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Contour Details
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Build additional sewer collection lines
 Restore San Pedro pump station
 Construct holding tank
 Construct wastewater treatment plant

Ultimate Goal  Move water into the
Cojimar Watershed
Current Plan- funding provided by
Organization of Petroleum
Exporting Countries (OPEC)
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Almendares Watershed
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Methods for Treating Domestic
Wastewater
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
Protect Human Health
◦
◦
◦
◦
Cost-effective
Easy to use and maintain
Incorporate local materials and practices
Minimize environmental impacts
Advantages/Disadvantages of different
unit processes
 Technical Analysis
 Cost

Design Process
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
Phase I: Preliminary, Primary Treatment
and Disinfection
◦ Grit Removal
◦ Settling Tanks (Clarifiers)
◦ Chlorine Gas
◦ Sludge Treatment

Phase II: Secondary treatment
◦ Trickling Filter
◦ Settling Tanks

Phase III: Tertiary Treatment- Nutrient
Removal
◦ Nitrogen and Phosphorus
Three Project Phases
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Site Layout
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
Population growth to 2025
(WHO)
◦ 82,500 people

Quality of wastewater assumed from EPA,
UN, and Puerto Rico Aqueduct and Sewer
Authority

With all treatment systems implemented,
Class A quality status
◦ Rivers and reservoirs that are utilized as a
source of potable water for public use and/or
industrial use for the processing of food
Effectiveness of the Design
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Look at how much each phase would cost
 Use cost estimating tables and historical
knowledge from similar projects in the
U.S.
 Consider impact on Almendares and
Cojimar watersheds

Cost Analysis
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Description
No action (discharge
without treatment to
San Francisco River)
Cumulative
Cost
(U.S. $m)
0
Benefit to San
Benefit to
Francisco and
Cojimar
Almendares Rivers
River
Status quo: threat to
drinking water and
ecology
N/A
Electric and control
Severe
Diversion to Cojimar
panels: $330 K
Removal of public health Impairment.
River without
Entire pump station:
threat downstream Threatens even
treatment
$2.3 M
Class “C” uses
Phase 1:
Diversion with
Primary Treatment
Phase 2:
Diversion with
Secondary Treatment
Phase 3:
Diversion with
Tertiary Treatment
$26 Million
($24 +$2.3)
$44 Million
(18+24+2.3)
$47 Million
(3+18+24+2.3)
Comments
Not acceptable. Cost of
alternative water supply
for Havana is very high.
Not acceptable
Impairment.
Removal of public health
May not meet
threat
Class “C” uses
Acceptability
questionable
Removal of public health Allows Class “B”
threat
uses
Acceptable
Removal of public health Allows Class “A”
threat
uses
Acceptable
**CITATION FOR TABLE****
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
The Almendares Watershed needs to be
protected to safeguard human health
◦ Implementation of three phases will bring
wastewater quality up to the highest standards
◦ Contamination of the environment will also be
avoided- cleaner and more suitable resources for
fishing or recreation and tourism
◦ Further work should be done with economists to
fully understand the impact on the region
Conclusion
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
Thank you!
Questions?
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
This presentation reflects the collective guidance and review comments from many
individuals both within and outside the University of Miami (UM) Department of Civil,
Architectural and Environmental Engineering. The UM senior class project team would like to
specifically thank the following individuals and organizations for their valuable time in
providing ideas and review comments:

University of Miami Department of Civil and Environmental Engineering:
◦ Helena Solo-Gabriele, Ph.D., P.E.

CDM (Camp, Dresser & McKee Inc):
◦ Armando Perez, P.E., PhD
◦ Victor Pujals, P.E.
◦ Stefan Haecker, P.E.
◦ Ignacio L. Lizama, P.E.
◦ Bruce Chalmers, P.E.
◦ Layla Llewelyn, P.E.

Hazen and Sawyer:
◦ Fernando Chiriboga, P.E.
◦ Peter S. Robinson, P.E.
◦ Jason Payge, P.E.
Acknowledgements
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