Zeferino, Cunha and Antunes - input2012

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João Zeferino, Maria C. Cunha e António Antunes on "A robust model for regional wastewater system planning"

Transcript of Zeferino, Cunha and Antunes - input2012

  • 1. 0 FACULTY OF SCIENCES AND TECHNOLOGY UNIVERSITY OF COIMBRA Cagliari, 10-12 May 2012A robust model for regionalwastewater system planningJoo Zeferino, Maria C. Cunha e Antnio Antunes
  • 2. I Problem II Optimization III OptWastewater IV Case Study V Model resultsPresentation Approach Outline I Problem presentation II Optimization approach III OptWastewater IV Case study V Model results 10-12 FACULTY OF SCIENCES May A robust model for regional wastewater system planning AND TECHNOLOGY UNIVERSITY OF COIMBRA 1
  • 3. I Problem II Optimization III OptWastewater IV Case Study V Model results Presentation Approach Introduction Estimated 2.5 billion people without basic sanitation 90% of the wastewater daily discharged in developing countries is untreated Millennium Development Goals (1990-2015) : target 7C ENSURE ENVIRONMENTAL SUSTAINABILITY Halve, by 2015, the proportion of the population without sustainable access to safe drinking water and basic sanitation Regional wastewater system planning A planning approach at regional level takes advantage of scale economies, while achieving a better environmental performance. 10-12 FACULTY OF SCIENCES May A robust model for regional wastewater system planning AND TECHNOLOGY UNIVERSITY OF COIMBRA 2
  • 4. I Problem II Optimization III OptWastewater IV Case Study V Model resultsPresentation Approach Regional Wastewater Systems Planning The infrastructure for draining and treating wastewater includes the following facilities: Wastewater treatment plants (WWTP) to process the wastewater before it is discharged into rivers Sewer networks connecting the population centers with the WWTP Pump stations to lift wastewater if it is unfeasible or uneconomic to drain it by gravity 10-12 FACULTY OF SCIENCES May A robust model for regional wastewater system planning AND TECHNOLOGY UNIVERSITY OF COIMBRA 3
  • 5. I Problem II Optimization III OptWastewater IV Case Study V Model results Presentation Approach Regional Wastewater Systems Planning ECONOMIC / ENVIRONMENTAL Find the minimum cost configuration Guarantee the water quality in the for the system required to drain and river that receives the treated treat the wastewater wastewater discharges Installation costs Operation and maintenance costs 10-12 FACULTY OF SCIENCES May A robust model for regional wastewater system planning AND TECHNOLOGY UNIVERSITY OF COIMBRA 4
  • 6. I Problem II Optimization III OptWastewater IV Case Study IV Model resultsPresentation Approach Optimization Model minimize C Objective to optimize (costs) Continuity QRi Q ji Qij = QRi , i NS Qji i Qij jN S N I jN Q jl Qlj = 0, l NI Qjl l Qlj jNS N I jN Q jk = QTk , k N T Qjk k jN S N I QTk QRi = QTk iN S kNT 10-12 FACULTY OF SCIENCES May A robust model for regional wastewater system planning AND TECHNOLOGY UNIVERSITY OF COIMBRA 5
  • 7. I Problem II Optimization III OptWastewater IV Case Study IV Model resultsPresentation Approach Optimization Model minimize C Objective to optimize (costs) Q ji Qij = QRi , i NS jN S N I jN Q jl Qlj = 0, l NI jNS N I jN Q jk = QTk , k NT Continuity jN S N I QRi = QTk iN S kNT Capacity Bernoulli theorem QTk QT maxk . yk , k NT Head losses (Manning-Strickler equation) Hydraulic Flow velocity Q min ij .xij Qij Q max ij .xij , i N S N I ; j N model Sewer slope Diameters commercially availabe 10-12 FACULTY OF SCIENCES May A robust model for regional wastewater system planning AND TECHNOLOGY UNIVERSITY OF COIMBRA 6
  • 8. I Problem II Optimization III OptWastewater IV Case Study IV Model resultsPresentation Approach Optimization Model minimize C Objective to optimize (costs) Q ji Qij = QRi , i NS jN S N I jN Q jl Qlj = 0, l NI jNS N I jN Q jk = QTk , k NT Continuity jN S N I QRi = QTk iN S kNT QTk QT maxk . yk , k NT Q min ij .xij Qij Q max ij .xij , i N S N I ; j N