docConceptual Design of a Wastewater Treatment Plant for the
download 
Report Transcription
Conceptual 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 2009 ASCE Conference Miami FL 2 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 Drink Beer 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 Cristal River Touristic Center Cotorro WWTP Hospital VENTO‐ALMENDARES WATERSHED BOUNDARY Hospital Plastics Factory San Pedro Pump Station Metal Smelter EJERCITO REBELDE Building Material Factory RESERVOIR Unknown Ice Cream Factory Factory PASO SEQUITO RESERVOIR TOWN OF CALABAZAR 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 2009 ASCE Conference Miami FL 3 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 2009 ASCE Conference Miami FL 4 Contour Details 2009 ASCE Conference Miami FL 5 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) 2009 ASCE Conference Miami FL 6 Almendares Watershed 2009 ASCE Conference Miami FL 7 Methods for Treating Domestic Wastewater 2009 ASCE Conference Miami FL 8 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 2009 ASCE Conference Miami FL 9 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 2009 ASCE Conference Miami FL 10 Site Layout 2009 ASCE Conference Miami FL 11 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 2009 ASCE Conference Miami FL 12 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 2009 ASCE Conference Miami FL 13 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 Comments Not acceptable. Cost of alternative water supply for Havana is very high. 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 Class “C” uses $2.3 M 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) 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**** 2009 ASCE Conference Miami FL 14 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 2009 ASCE Conference Miami FL 15 Thank you! Questions? 2009 ASCE Conference Miami FL 16 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 2009 ASCE Conference Miami FL 17
