Treating Waste as a Resource

Transcription

1 Treating Waste as a Resource A Tool to Fight Climate Change Puget Sound Georgia Basin Ecosystem Conference February 9, 2009 Stephen Salter, PEng Farallon Consultants Limited Victoria, BC

2 Our problems are connected Energy Water Problems Climate Food

3 Our solutions are connected Energy Water Solutions Climate Food

4 In nature, waste = food

5 As Mr. Floatie Says: "There's so much in me to love!" Biofuels Water Fertilizer Heat

6 What's waste worth? Liquid & solid waste combined* Heating for 30% of a city's homes Electricity for 10% of a city's homes Biofuel for 10% of a city's vehicles Greenhouse gas reductions of 25% *Resources from Waste: Integrated Resource Management Study

7 1. Water from wastewater Non-potable uses Buildings Stream Recharging Treated Water Non-potable Uses Groundwater Recharging Irrigation Water Features Disinfection Tertiary Treatment Process Water Industry

8 1. Water from wastewater Non-potable uses Irrigation Vernon, BC Irrigation California Golf Course

9 1. Water from wastewater Non-potable uses Water features, wetlands Cooling cells Living Machine Oberlin College, Ohio

10 1. Water from wastewater Non-potable uses Dockside Green Treatment Plant Dockside Green Water Feature

11 1. Water from wastewater Potable use Reclaimed Water Australia Reclaimed Water San Diego

12 2. Heat & cold from wastewater Higher temperature=higher value Increasing Temperature 12 to 20º C 7 to 10º C 4º C Wastewater temperature Ground temperature 3 to 6º C available Lower temperature of heat pumps 8 to 16º C available

13 2. Heat & cold from wastewater With centralized treatment, Stockholm

14 2. Heat & cold from wastewater Hammarby Sjöstad, Stockholm

15 2. Heat & cold from wastewater With centralized treatment Energy Service Provider Raw Sewage Treatment Plant Effluent Heat Pump Building D Building E District cooling loop Building A Building B District heating loop Building C

16 2. Heat & cold from wastewater With decentralized treatment Building Raw Sewage Heating Loads Treatment Plant Effluent Water line Heat Pump Water for Reuse Cooling Loads

17 2. Heat & cold from wastewater With decentralized treatment Kelowna, BC Wastewater Treatment Plant Heat Pumps at Okanagan College

18 2. Heat & cold from wastewater With decentralized treatment The Legislative Precinct Concept, Victoria

19 3. Nutrients from waste Minerals & fertilizer Raw Sewage Treatment Treated Water Biosolids Biogas Digester Solid Residues Digester Water "Struvite" (MgNH 3 PO 4 6H 2 O) Fertilizer Recovery

20 4. Biofuels from waste Waste collection in Stockholm

21 4. Biofuels from waste Biogas upgrader in Stockholm

22 4. Biofuels from waste Biogas bus in Stockholm

23 4. Biofuels from waste Biogas car in Kristianstad

24 More information Resources from Waste: Integrated Resource Management Study Global Footprint Network The Natural Step Natural Capitalism Swedish Environmental Protection Agency