PUTTING ORGANIC WASTE TO WORK IN SASKATOON. Canadian Compost Council Edmonton, AB March 2, 2017

Transcription

1 PUTTING ORGANIC WASTE TO WORK IN SASKATOON Canadian Compost Council Edmonton, AB March 2, 2017

2 Roland Rusnell- Engineering Technologist City of Saskatoon Water & Waste Stream

3 Working With Organic Waste History Approved/Acceptable Materials Challenges Utilization Future

4 Saskatoon Compost History Promoted backyard composting partnering with Sask Waste Reduction Council (SWRC) Experimented with curbside collection in early 2K Accepting yard waste drop off (no wood) on limited basis at LF and one other site

5 Saskatoon Compost History Open first depot in 2006 on East side Open second depot in 2007 on West side Expanded approved materials to include branches and logs in 2009

6 Volume No scales - using vehicle count and load volume estimates comparing to finished compost volume 51,000 vehicles in 2016 Estimated 100,000 tonnes feedstock over 10 years

7 Compost Depots Approved material types Yard waste leaves, grass, garden refuse Non-elm branches, logs, stumps, wood chips Sod Green cart refuse yard and food waste from subscribing households (10% of SFD)

8 Approved Materials

9 Green Cart Program

10 Compost Depots Accepted material types with specific permission Ag waste Spoiled grain Spoiled hay Straw Manure (equine/bovine) Dockage (rejects from screening grain) Zero waste event Food Compostables-napkins, plates, artillery Grubbing

11 Zero-Waste Event Material

12 Grubbing

13 Challenges For Every Operation Site Selection Maintaining Quality Screening loads for inappropriate material Mixing to meet required C:N ratio Monitoring processes and adjusting Oxygen Water content Temperature Testing Maturity Solvita quick jar test Quality Assurance testing

14 Challenge: Site Selection Site Logistics Getting customers in and out safely Staff workplace and accoutrements Emergency response - Operating Plan Data acquisition and storage Short term storage Feedstock temporary storage Long term storage Windrow layout Curing

15 West Site Layout Windrows Man-made Reservoir Traffic Safety Grubbing Logs Topsoil Blending and Watering Leaves and grass Branches Curing OperationsEntrance and Screening 1-Way Public

16 Traffic Safety

17 Traffic Safety

18 East Transfer Station

19 Aeration Using a turner since mid 2014 CT616 pull-type Vermeer - ~2200 tph

20 Watering Windrows

21 Cost of Waste Management 2016 BULK DISPOSAL COSTS $3, landfill fees for found waste after unloading does not include hauling cost 2016 CONTRACTED COLLECTION COSTS - $9,632 convenience bins for bags The value of a good waste screening program cannot be overstated

22 Challenge: Screening Inappropriate materials Treated wood Stone/gravel Concrete Rubbish Doggie Elm

23 Wagon Loads of Waste

24 Bulky Waste

25 Quality Assurance Sampling and testing as per CQA Not a member - yet Field testing to include: windrow temperature, maturity, ph, EC, water content, O 2 monitoring, bulk density.

26 Maturity Testing with Solvita

27 Finished Compost

28 Challenge: Marketing Marketing Products Screened mature compost Unscreened mature compost Screened mulch Unscreened mulch Screened topsoil Firewood Working on a comprehensive plan for 2018 to sell small volumes to residents

29 Internal Customers City Parks and Land Branch are the two biggest influencers on internal compost and mulch use 3,000 to 5,000 cubic metres per year in new park construction, boulevard redevelopment, silva-cell construction, district park re-construction, nurseries, slope stability

30 External Customers Donations to >30 community gardens m 3 /year Type II Septic Mound Construction unscreened 500 m 3 /year Commercial haulers for residential customers m 3 /year Landscapers m 3 /year

31 Community Garden

32 Community Garden

33 Public Sale Pilot Compost Sale Saturdays 2012 & 2013 Maximum cost, minimum benefit $5/20 litres bag compost $5/20 litres mulch $20/0.25 yd 3 using skid steer

34 Public Sale Traffic Flow

35 Public Sale Pilot

36 Challenge: Watering Tried several minimal cost methods- all ended up being very labour intensive So far watering on blending pad then putting up windrows works best Moving toward water truck

37 Future On borrowed time for both sites East short term lease agreement with private dev West has longer term potential but not permanent Need a PERMANENT home or significant operational change Established market/marketing

38 Changes Being temporary leaves current program in constant flux with budgetary restrictions, inconsistent service levels and operational inefficiencies Investigating options to engage with private sector for municipal compost operations

39 THANK YOU (306)

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41 Business Case for Turner Began in 2013; by August 2014 we had it working