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September 29 th 2012 | New Orleans, Louisiana Water Environment Federation | Student Design Competition.

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Presentation on theme: "September 29 th 2012 | New Orleans, Louisiana Water Environment Federation | Student Design Competition."— Presentation transcript:

1 September 29 th 2012 | New Orleans, Louisiana Water Environment Federation | Student Design Competition

2 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Agenda Introduction Current Process Overview Design Philosophy Phase I Upgrade and Expansion Phase II Conceptual Overview Conclusions 1

3 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Introduction: 2 Port Dover Water Pollution Control Plant WEF TEC 2012 New Orleans, Louisiana, USA Ryerson University Toronto, Ontario, Canada Port Dover WPCP Norfolk County, Ontario, Canada Source: Google Maps

4 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Introduction: 3 Port Dover Water Pollution Control Plant Lake Ontario Lake Erie Port Dover, Ontario Toronto, Ontario Cleveland, Ohio Detroit, Michigan Source: Google Maps Photo: Wally Crawler

5 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Introduction: 4 Port Dover Water Pollution Control Plant Lake Erie Overview of Current Plant: Most recent upgrade occurred in Treated wastewater sent directly into Lake Erie Activated sludge treatment using mechanical surface aeration Chemical addition for nutrient removal and disinfection 1991 Source: Google Maps

6 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Project Statement 5 Present a preliminary design and layout of an upgrade/expansion for the Port Dover WPCP to meet capacity for the year 2026, solving bypass issues. Phase I Phase II Prepare a conceptual layout for Phase II of the expansion of the Port Dover WPCP to account for expected population grown beyond Budget: $8,800,000 CND Budget: $8,000,000 CND 6,400 to 12,800 Population is expected to grow from by 2026.

7 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Design Basis 6 Current Design Capacity Phase I Design Capacity Average Daily Flow (ADF) 5,400 m 3 /day7,280 m 3 /day Peak Daily Flow (PDF)18,000 m 3 /day24,880 m 3 /day Changes In Design Capacity 24,880 m 3 /day

8 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Design Basis 7 Concentration at Average Flow Ministry of Environment Effluent Limit Current Plant Design Objective CBOD mg/L25 mg/L15 mg/L TSS 160 mg/L25 mg/L15 mg/L TP 5.5 mg/L1.0 mg/L0.8 mg/L TKN 35 mg/LN/A E. Coli N/A 200 organisms/100 mL Existing Characteristics

9 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Design Basis 7 Proposed Design BasisNew Ministry of the Environment Effluent LimitsNew Design Objectives CBOD 5 15 mg/L10 mg/L TSS 15 mg/L10 mg/L TP 0.5 mg/L0.3 mg/L Ammonia and Ammonium Nitrogen Apr 1 –Sept 30: Oct 1 – Mar 30: 5.0 mg/L 9.0 mg/L April 1 –Sept 30: Oct 1 – Mar 30: 3.0 mg/L 5.0 mg/L E. Coli 150 organisms/100 mL100 organisms/100 mL

10 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 8 Existing Port Dover WPCP Layout To Landfill Screening and Grit Vortex Primary Clarifier Aeration Basin Secondary Clarifier Disinfection Anaerobic Digester Ferric Chloride Sodium Hypochlorite To Land Application To Lake Erie Design Capacity Average Daily Flow: 5,400 m 3 /day Peak Daily Flow: 18,000 m 3 /day > 18,000 m 3 /day Raw Wastewater Discharge!

11 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 9 Points of Concern with Current Design with the current plant have been identified. 5 issues

12 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 10 Points of Concern with Current Design To land application To landfill Screening and Grit Vortex Primary Clarifier Aeration Basin Secondary Clarifier Disinfection Anaerobic Digester Ferric Chloride Sodium Hypochlorite To Lake Erie Issue 1: Gross Solids Buildup

13 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 10 Points of Concern with Current Design Issue 1: Gross Solids Build Up Solids build up on bar screen causes total plant bypass even when flow does not exceed plant capacity Current bar screen has single rake

14 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 11 Points of Concern with Current Design To land application To landfill Screening and Grit Vortex Primary Clarifier Aeration Basin Secondary Clarifier Disinfection Anaerobic Digester Ferric Chloride Sodium Hypochlorite To Lake Erie Issue 2: Raw Wastewater Discharge

15 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 11 Points of Concern with Current Design Issue 2: Raw Wastewater Discharge There are bypass events each year from clogging and wet weather events Source: Google Maps Not acceptable!

16 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 12 Points of Concern with Current Design To land application To landfill Screening and Grit Vortex Primary Clarifier Aeration Basin Secondary Clarifier Disinfection Anaerobic Digester Ferric Chloride Sodium Hypochlorite To Lake Erie Issue 3: Chemical Addition for Nutrient Removal

17 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 12 Points of Concern with Current Design Issue 3: Chemical Addition For Nutrient Removal Chemically precipitated phosphates are not readily bioavailable Dependence on ferric chloride is not cost effective

18 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 13 Points of Concern with Current Design To land application To landfill Screening and Grit Vortex Primary Clarifier Aeration Basin Secondary Clarifier Disinfection Anaerobic Digester Ferric Chloride Sodium Hypochlorite To Lake Erie Issue 4: Inefficient Aeration

19 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 13 Points of Concern with Current Design Issue 4: Inefficient Aeration Mechanical aeration is outdated! Poor efficiency Poor control

20 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 14 Points of Concern with Current Design To land application To landfill Screening and Grit Vortex Primary Clarifier Aeration Basin Secondary Clarifier Disinfection Anaerobic Digester Ferric Chloride Sodium Hypochlorite To Lake Erie Issue 5: Chemical Addition for Disinfection

21 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 14 Points of Concern with Current Design Issue 5: Chemical Addition For Disinfection Dechlorination may be required for increased flow rates, increasing cost per litre treated Problematic for aquatic life, may produce harmful by- products

22 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Design Philosophy: 15 Commitment to Sustainable Design Source: NOAA (US) Source: Sandusky Register Eutrophication Algal blooms caused by increased nutrient levels in bodies of water can reduce the level of dissolved oxygen. Eutrophication decreases enjoyment of waterways and property values. It harms aquatic ecosystems and poses a human health hazard.

23 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Design Philosophy: 15 Commitment to Sustainable Design The choices we make affect the future of Lake Erie Ryerson Design Team The Ryerson Design Team aims for the following in our design: The introduction of a more advanced treatment The reduction of energy consumption The removal or reduction of chemical addition We aim to show that sustainable and advanced treatment is a more cost effective and responsible choice

24 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Process Overview: 16 Points of Concern with Current Design Ryerson Design Team The Ryerson Design Team has applied their philosophy to solve to the at Port Dover. 5 issues

25 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrades 17 Solution to Issue One: Upgrade to Bar Screen The bar screen channel is widened to accommodate a larger screen for increased flow A multi rake system is installed for increased solids removal

26 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrades 18 Solution to Issue Two: Installation of Overflow Tank Adding a bypass overflow tank will prevent untreated wastewater from entering Lake Erie Tank volume sized based on historical wet weather event data

27 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrades 19 Solution to Issue Three: Adaptation of Westbank Biological Nutrient Removal Process Reduction of discharge BOD concentration Reduction of discharge nutrients Nitrogen as ammonia and ammonium Phosphate Advanced Treatment Conventional How does BNR work?

28 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrades 20 Reduction of Discharge BOD Concentration Requires: Heterotrophic organism (about 26% of MLSS) Terminal electron acceptor – Oxygenor Nitrates

29 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrades 21 Reduction of Discharge Nutrient Levels - Phosphate Anaerobic Zone Physical uptake of phosphate into Phosphate Accumulating Organisms (PAO) VFA P PHA Aerobic or Anoxic Zone P PHA P P

30 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrades 21 Reduction of Discharge Nutrient Levels - Nitrogen Nitrification Ammonium + Oxygen Nitrosomonas Nitrobacter Nitrate + Water + H + Facilitated by Autotrophic microbes – 2% of MLSS Rate limiting! Nitrates + Carbon Source Heterotrophic microbes Nitrogen Gas + Carbon Dioxide + Water Denitrification

31 Secondary Treatment: BNR and BOD reduction Secondary Treatment Reactors AnoxicAnaerobicAerobic Clarifier Waste Activated Sludge (WAS) Volatile Fatty Acids (VFA) Wastewater Recycle (WR) Return Activated Sludge (RAS) 27 Phase I Upgrades 22 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA

32 Secondary Treatment: BNR and BOD reduction Temperature Effects on Ammonium removal Effluent Limits Effluent Goals Expected effluent concentration with 5,250 m 3 reactor Jan Feb Mar AprilMayJuneJulyAugSeptOctNovDec 12.2 C 25.7 C 31 Secondary Treatment: BNR and BOD reduction 27 Phase I Upgrades 23 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA

33 Phase I Upgrades 24 Solution to Issue Four: Use of Fine Bubble Diffusers for Aeration Increased oxygen transfer and energy efficiency Source: WEC Projects Automated controls ensure proper performance

34 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrades 25 Ultraviolet Disinfection and Sand Filters Solution to Issue Five: Sand Filtration and UV Disinfection Use of ultraviolet disinfection eliminates the requirement for chemical addition Moving bed sand filtration prior to disinfection: Reduction of suspended solids leads to decreased power consumption Filtering also further reduces nutrient levels Source: water-technology.net Better nutrient removal Less UV power required

35 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrade and Expansion 26 Bar ScreenVortex Grit Chamber Overflow Tank Headworks and Primary Clarification Raw Wastewater Effluent to Lake Erie Overflow to By-Pass Rectangular Primary Clarification

36 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Upgrade and Expansion 26 Bar ScreenVortex Grit Chamber Overflow Tank Headworks and Primary Clarification Raw Wastewater Effluent to Lake Erie Overflow to By-Pass Rectangular Primary Clarification Volume: 575 m 3 16m L X 7m W x 5m H Volume: 575 m 3 16m L X 7m W x 5m H Type: Multi-Rake Capacity: 24,800 m 3 /day Width: 700mm Bar Spacing: 40mm Type: Multi-Rake Capacity: 24,800 m 3 /day Width: 700mm Bar Spacing: 40mm Additional Volume: 8.54 m 3 Detention Time: 30s Grit Removal: 2.29 m 3 /day (PDF) 0.67 m 3 /day (ADF) Additional Volume: 8.54 m 3 Detention Time: 30s Grit Removal: 2.29 m 3 /day (PDF) 0.67 m 3 /day (ADF) Sludge Fermenter 18.5 mg/L VFAs in Winter 23.5 mg/L VFAs in Summer SRT: 5 days (ADF) 2 days (PDF) 18.5 mg/L VFAs in Winter 23.5 mg/L VFAs in Summer SRT: 5 days (ADF) 2 days (PDF) Additional SA: 105 m 2 (22.9m L x 4.6m W) Goal SOR: 70m 3 /day-m 2 HRT: 4.2 h (ADF) 1.2 h (PDF) Additional SA: 105 m 2 (22.9m L x 4.6m W) Goal SOR: 70m 3 /day-m 2 HRT: 4.2 h (ADF) 1.2 h (PDF)

37 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA 27 Overflow Tank Secondary Treatment From Primary Clarifiers Mechanical Aeration Chamber Circular Secondary Clarifiers To Digester To Disinfection Ferric Chloride Phase I Upgrade and Expansion

38 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA 27 Overflow Tank Secondary Treatment From Primary Clarifiers Mechanical Aeration Chamber Circular Secondary Clarifiers Anoxic Aerobic Reactor Dissolved Oxygen To Digester To Disinfection VFA from Primary Fermenter Anaerobic Phase I Upgrade and Expansion Anoxic Reactor Volume: 668 m 3 HRT: 0.34 h (PDF) 1.2 h (ADF) SRT: 6.4 days Anaerobic Reactor Volume: 668 m 3 HRT: 0.34 h (PDF) 1.2 h (ADF) Anoxic Reactor Volume: 668 m 3 HRT: 0.34 h (PDF) 1.2 h (ADF) SRT: 6.4 days Anaerobic Reactor Volume: 668 m 3 HRT: 0.34 h (PDF) 1.2 h (ADF) Aerobic Reactor Volume: 5,250 m 3 HRT: 2.7 h (PDF) 9.1 h (ADF) SRT: 15 days DO Required: 2mg/L Aerobic Reactor Volume: 5,250 m 3 HRT: 2.7 h (PDF) 9.1 h (ADF) SRT: 15 days DO Required: 2mg/L Diameter: 18m Side Wall Depth: 4.6m Bottom Slope: 1:12 Goal SOR: 35m 3 /day-m 2 Diameter: 18m Side Wall Depth: 4.6m Bottom Slope: 1:12 Goal SOR: 35m 3 /day-m 2

39 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA 28 Overflow Tank Disinfection From Secondary Treatment Effluent to Lake Erie From Secondary Bypass Chlorine Contact Chamber Sodium Hypochlorite Phase I Upgrade and Expansion

40 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA 28 Overflow Tank Disinfection From Secondary Treatment Effluent to Lake Erie From Secondary Bypass Chlorine Contact Chamber Sodium Hypochlorite Phase I Upgrade and Expansion Continuous Backwash Sand Filters Ultraviolet Disinfection Chlorine Contact Chamber Number of filters: 14 Total SA: 71.4 m 2 TSS Reduction: 90% Number of filters: 14 Total SA: 71.4 m 2 TSS Reduction: 90% Dose: 20 mW sec/cm 2 (PDF) 15 mW sec/cm 2 (ADF) Effluent Quality: 50 organisms / 100 mL Dose: 20 mW sec/cm 2 (PDF) 15 mW sec/cm 2 (ADF) Effluent Quality: 50 organisms / 100 mL

41 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA 29 Overflow Tank Solids Handling To Landfill Screenings and Grit Primary Sludge Waste Activated Sludge Egg Shaped Digester Methane to Boiler To Biosolids Storage and Land Application Phase I Upgrade and Expansion

42 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA 29 Overflow Tank Solids Handling To Landfill Screenings and Grit Primary Sludge Waste Activated Sludge Egg Shaped Digester Methane to Boiler To Biosolids Storage and Land Application Phase I Upgrade and Expansion Sludge Fermenter VFA to Anaerobic Reactor

43 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Plant Layout 30 Overflow Tank Source: Google Maps Headworks and Primary Treatment Secondary Treatment and Nutrient Removal Disinfection

44 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Hydraulic Profile 31 Source: Google Maps

45 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Hydraulic Profile 31 Source: Google Maps 191m Elevation

46 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Hydraulic Profile 31 Source: Google Maps

47 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Hydraulic Profile 31 Source: Google Maps

48 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Effluent Characteristics 32 Overflow Tank Effluent LimitExpected Effluent CBOD 5 15 mg/L8.6 mg/L TSS 15 mg/L1.5 mg/L TP 0.5 mg/L Ammonia and Ammonium Nitrogen Apr 1 –Sept 30: Oct 1 – Mar 30: 5.0 mg/L 9.0 mg/L Apr 1 –Sept 30: Oct 1 – Mar 30: 1.3 mg/L 2.3 mg/L E. Coli 100 organisms/100 mL50 organisms/100 mL

49 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I Safety and Environmental 33 Plant and Process Safety None of the process changes proposed pose considerable additional safety concerns The design should account for all applicable codes and regulations under the Occupational Health and Safety Act, the Building Code Act, 1992 and the Fire Protection and Prevention Act, Environmental Concerns Construction must take place in a manner with the least impact on the surrounding environment. Favor should be given to tenders which consider environmentally responsible practices. Landscaping should be replaced

50 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I: Noise and Odour 34 Overflow Tank Source: Google Maps Sensitive Land Use 100m

51 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Phase I SCADA Upgrades 35 LocationMonitoringControl Overflow TankLiquid LevelPump Speed Aerobic ReactorDissolved OxygenBlower Rate Sand FiltersFlow RateBlower Rate Primary FermenterFlow RatePump Speed

52 Phase I Capital Cost 6 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA 36 Equipment and Facility Electrical and Process Control Retrofit and Demolition Engineering Services Contingency Total Phase I Cost: $7,338,000 CND Phase I Budget: $8,800,000 CND

53 Phase I Operational Cost 6 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA 37 Maintenance Costs Electricity Costs Labour Costs Operations and Maintenance: $552,000 CND/year Estimated Chemical Savings: $135,000 CND/year

54 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Construction Schedule 38

55 Phase II Conceptual Overview 6 April 22 nd Ottawa, Ontario Source: Google Maps Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Upgrade of bar screen channel width Evaluate the use of cogeneration and pasteurization for effluent disinfection Additional primary clarifier may be needed Chemical free dewatering such as gravity belt thickeners for space savings Use of fixed film process to increase MLSS without solids loading on clarifiers Upgrade odor control to include buildings over nutrient removal and biofilters for treatment of air discharged to the environment 39

56 Concluding Remarks 40 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Ryerson Design Team The Ryerson Design Team has presented a preliminary design for the upgrade and expansion of the Port Dover site and a conceptual plan for the future of the site The presented design: is under budget advances treatment levels presents O&M savings represents a sustainable solution to plant issues

57 Concluding Remarks 5 issues were solved 41 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA IssueSolution 1. Gross solids buildup causing bypass Upgrade to bar screen system 2. Raw Water DischargeAddition of overflow tank 3. Dependency on chemical addition for nutrient removal Adoption of biological nutrient removal 4. Inefficient AerationUse of fine bubble diffusers 5. Dependency on chemical addition for disinfection Installation of sand filters and UV disinfection

58 Concluding Remarks 42 Ryerson University Design Team | WEF SDC September 29 th 2012 | New Orleans, LA Ryerson Design Team The Ryerson Design Team wishes to thank and acknowledge: Dr. Manuel Alvarez-Cuenca, Ph.D., P.Eng, Faculty Advisor Professor of Chemical Engineering – Ryerson University Maryam Reza, M.A.Sc., Consulting Advisor Wastewater Design Engineer – Cole Engineering Group Ltd. The Department of Chemical Engineering - Ryerson University


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