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Sustainable Wastewater Management

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Potable water use reduction in buildings. 100% wastewater treatment on-site ... No potable water use for irrigation. Green roofs. LEED buildings. 11 ... – PowerPoint PPT presentation

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Title: Sustainable Wastewater Management


1
Sustainable Wastewater Management
  • A Case Study
  • for the District of Sooke
  • Sustainable Communities Forum
  • March 6, 2008
  • Presented by Tami Wetmore, EPCOR Water Services
    Inc.

2
Sustainable Wastewater Management
  • Wastewater is an untapped resource
  • Water Reuse
  • High quality water source
  • Biosolids Reuse
  • Soil amendments fuel source
  • Energy Recovery
  • Gas production from Biosolids used for power
    generation

3
Wastewater Components
4
Water Reuse
  • Long history of treated wastewater reuse
  • Urban reuse new to North America
  • Match water quality to re-use application
  • Regulated in BC through Ministry of Environment
    with consultation with Public Health Authorities
    Agriculture Depts
  • Restricted Public Use
  • Unrestricted Public Use

5
Water Reuse Categories
  • Unrestricted Public Use
  • Treatment Required very high standard to allow
    unrestricted public contact
  • Examples
  • Landscape greenhouse irrigation
  • Parks golf course irrigation
  • Street washing
  • Toilet flushing
  • Fire fighting
  • Aquaculture
  • Restricted Public Use
  • Treatment Required higher quality than most
    discharge standards, however resulting quality
    still requires restricted public contact
  • Examples
  • Silviculture, seed orchard, seedling production
  • Drip irrigation for orchards or vineyards
  • Nurseries
  • Wetlands

6
Regional District of Nanaimo
  • French Creek Pollution Control Centre
  • 16 ML/day (24,000 people)
  • Secondary treatment
  • App. 1 ML/d (10) of summer production used for
    golf course irrigation
  • Biosolids used for land reclamation

7
City of Vernon
  • Water Reclamation Centre
  • 13 ML/d (36,000 people)
  • Tertiary treatment with disinfection
  • All treated wastewater is stored used April
    October for irrigation
  • Golf courses, seed orchard, forestry centre,
    nursery, grazing hay lands
  • Biosolids composting

8
City of Edmonton
  • Goldbar Wastewater Treatment Plant
  • 260 ML/d (650,000 people)
  • Tertiary treatment with disinfection
  • 5 ML/d treated with membrane filtration for reuse
    at industrial sites
  • Anaerobic digestion power generation from
    methane gas
  • Biosolids co-composted with solid waste

9
District of Sooke WWTP
  • 3 ML/d (10,000 people)
  • Secondary Treatment with disinfection
  • Water Reuse Potential
  • Plant Process Water
  • Irrigation Systems
  • Biosolids Reuse Potential
  • Forestry
  • Land reclamation
  • Composting

10
Dockside Redevelopment - Victoria
  • 11 acre redevelopment
  • Environmental features include
  • Potable water use reduction in buildings
  • 100 wastewater treatment on-site
  • On-site renewable energy, including production
    from wastewater
  • No potable water use for irrigation
  • Green roofs
  • LEED buildings

11
Dockside Redevelopment - Victoria
12
Treat Re-use With Respect
  • Responsible for protection of public health
    environment
  • Design systems well
  • Manage facilities responsibly
  • Excellence in communications

13
Public Perception is Key
  • Reuse can be a huge success story or a terrible
    disaster
  • DONT TAKE ANY SHORTCUTS!
  • Design
  • Operations
  • Communications
  • Projects will fail if public trust is lost

14
Questions?
References Stantec Engineering Ltd.
www.stantec.com Regional District of Nanaimo
-www.rdn.bc.ca    City of Vernon -
www.vernon.ca Edmonton Waste Management Center
for Excellence http//ewmce.com BC Municipal
Sewage Regulation - www.env.gov.bc.ca
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