Wastewater Management in Metro Vancouver. Margaret Morales 14 March 2011 PLAN 597

Transcription

1 Wastewater Management in Metro Vancouver Margaret Morales 14 March 2011 PLAN 597

2 Outline Metro Vancouver an overview Wastewater Management in Metro Vancouver ILWMP What makes it Integrated? Governance shared responsibilities Treatment and Treatment Plants A case of interest: combined sewers Class activity to separate or not to separate?

3 Metro Vancouver An Overview

4 Metro Vancouver 22 municipalities + 1 electoral area + 1 First Nations Treaty Regional government for 2.3 million people Core services: drinking water, solid waste mgt, and sewerage and drainage

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6 Wastewater Management in MV ILWMP - What Makes it Integrated?

7 Wastewater Management in MV Existing LWMP adopted in 2001 and approved by Province 2002 under Waste Management Act ILWMP approved by the MV Board May, 2010; submitted to the provincial Minister of Environment June, 2010; awaiting approval

8 What makes it Integrated? 7 Significant changes from Stated focus on IRR (integrated resource recovery) 1. Though in truth, very little space devoted to this 2. Aligned with other Provincial Initiatives 1. Energy, climate change, water smart, regional growth strategy, air and water quality management action plans, etc. 3. Incorporates Burrard Inlet and Fraser River Estuary Management Plans (outfalls)

9 What makes it Integrated?: Membership 4. First Nations not mentioned in ? 5. 5 areas (including Electoral Area A) not GVS&DD members 2001 and did not participate in LWMP development

10 What makes it Integrated?: 6. 3 Goals based off Sustainable Region Initiative: Goal 1: Protect public health and the environment Goal 2: Use liquid waste as a resource Goal 3: Effective, affordable and collaborative management

11 What makes it Integrated?: Governance 7. In Canada, the management of wastewater is subject to shared jurisdiction, which has led to inconsistent regulatory regimes and varying levels of treatment across the country Through various consultation processes, interested parties have consistently indicated the need for all levels of government to develop a harmonized approach to managing the wastewater sector in Canada. --From wastewater systems effluent regulations CCME strategy under Fisheries Act $10-13 billion to meet CCME requirements

12 Wastewater Management in MV Governance Shared Responsibilities

13 Governance: Shared Responsibilities Federal Government: Environment Canada: regulates pollutants; protects species at risk. Fisheries and Oceans Canada: protects fish populations and habitat in receiving waters and urban streams. Infrastructure Canada: provides and administers infrastructure cofunding for local government projects. Provincial Government: Ministry of Environment: regulates liquid waste and approves Liquid Waste Management Plans. Ministry of Community and Rural Development: infrastructure financing; provides co-funding to local governments for civic projects. Ministry of Health: regulates on-site ww treatment (ie - septic tanks) Ministry of Agriculture and Lands: agricultural land management.

14 Governance: Shared Responsibilities Local Government: Metro Vancouver and GVS&DD Board: trunk sewers and major WWTPs industrial waste discharges, Implement required regional actions Municipal members of the GVS&DD: collector sewers, storm water systems, implement municipal actions, set local land use plans and community development standards. First Nations: constitutional rights must be taken into account in planning process Homeowners, businesses, institutions, and crown corporations: private property sewer connections and private storm water management systems

15 Wastewater Governance in MV 37 directors on GVS+DD Directors to Greater Vancouver Sewage and Drainage District Board appointed from municipal councils Electoral Area A has no local council. Voters elect a director to the board for a three-year term. The next election November 19, 2011.

16 Wastewater Management in MV Treatment and Treatment Plants

17 Wastewater Beyond the Toilet Wastewater Residential/Daily Industrial Runoff Bathroom Kitchen Laundry Storm water Other (sprinklers? Etc)

18 Metro Vancouver: Wastewater ~500 liters wastewater/person/day 1 of 5 WWTPs 440 billion liters/yr 80% of wastewater comes from homes 15,000km of sewer pipes Metro responsible for main sewage pipes

19 Pop Quiz! To which WWTP does UBC s wastewater go?

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21 Metro Vancouver: Plants Treatment Population Outfall ~Tons Lions Gate Primary 174,000 Burrard Inlet 670 biosolids/yr Iona Island Primary 600,000 Strait of Georgia 5,000 Lulu Island Secondary 1,000,000 Fraser River 1,850 Annacis Island Northwest Langley Secondary 120,000 Fraser River 12,000 Secondary 18,981 Fraser River 250

22 Wastewater Treatment Basics Primary: mechanical physical separation of suspended solids removes 30-40% total suspended solids (TSS) and 50% biological oxygen demand (BOD) Secondary: biological bacteria used to consume organic matter Fixed film or suspended growth removes 90% of TSS and BOD Tertiary: multiple Raises effluent quality Filtration, lagoons, nutrient removal, disinfection (UV)

23 Wastewater Treatment Basics II

24 Metro Vancouver: Wastewater Budget 36% of MV budget goes to WWTPs Each household pays about $280/yr in taxes for wastewater treatment From MV website: What Happens When I Flush?

25 A Case of Interest Combined Sewers

26 Sewer overflows Combined Sewer Overflow: storm water + sanitary sewers combined to 1 pipe; During heavy storm events sewer capacities are exceeded overflow 2008: 1,363 CSOs; 2009: 1,248 CSOs Sanitary Sewer Overflow: Infiltration from groundwater/rainwater overflow 2008: 28 SSOs; 2009: 41 SSOs

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28 Untreated Sewage Discharge

29 Now about that graph 1961 first WWTP opened (Lions Gate), so sharp decline misleading -???

30 Proposed Overflow Solutions In 1970s began a plan to separate all combined sewers into 2-pipe system now about 50% complete; expect to complete by 2050 Reduce waste at source/storm water management Reduce pipe infiltration with maintenance Keep in mind: private sewers connect homes to municipal system; make up >50% of 15,000km of pipe Containment tanks (New Westminister) Interim high rate overflow treatment facilities

31 Implementing 2-pipe system Separating municipal pipes Separating private pipes

32 Class Activity To separate or not to separate?

33 And now the application You are each board members on the GVS&DD representing municipalities: Group 1: Erik, Hana West Vancouver Group 2: Ali, Lauren, Theresa Vancouver, Group 3: Tim, Chema, Dana New Westminister

34 Group 1 Group 2 Group 3

35 Ah, le budget According to 2001 LWMP Combined Sewer Overflow Elimination (C-15): Everyone - GVRD: $ 5,090,000/yr Group 1 - West Vancouver: $0 Group 2 - Vancouver: $16,150,000/yr Group 3 - New Westminister: $1,195,000

36 And now GO! Based on information provided, does your municipality support the plan to separate? -- If so, what obstacles do you face and how do you propose to manage these? -- If not, how do you plan to mitigate overflows?