City of Edmonton High Solids Anaerobic Digestion Project

Transcription

1 City of Edmonton High Solids Anaerobic Digestion Project Allan Yee, CD, M.Sc., P.Eng. Senior Engineer, Organics Processing 5 March 2015

2 Outline What is Anaerobic Digestion (AD)? Why AD for the City of Edmonton? Conceptual project (HSADF) description Initial City of Edmonton RFP process milestones and timelines 2 nd City of Edmonton RFP process Technology evaluation Current Status and Future Milestones Project Risks

3 Basic Background Fermentation is general term that refers to the transformation of organic materials through microbes, e.g., making wine, bread, beer, cheese, yogurt, sauerkraut, kimchee... Composting is a fermentation process that occurs under aerobic conditions. Anaerobic Digestion is a fermentation process that occurs under anaerobic conditions.

4 Carbon Loss Nitrogen Loss CH 4 CO 2 NH 3 N 2 O H 2 O Heat Feedstock Compost Compost Pile Organic Matter (C,N), Minerals, Water, Microbes Organic Matter (C,N), Minerals, Water, Microbes O 2

5 Anaerobic Digestion for Solid Waste Anaerobic Digestion Processes Transformation of solid waste feedstocks in reactors sealed to provide oxygen free environment. Sanitary landfill analogous to AD reactor w/ no mixing Byproducts Biogas containing CH 4 (plus CO 2 and other volatiles) for renewable energy production - heat and power Semi-stable organic matter product (digestate) for further processing via composting or drying High Solids Anaerobic Digestion systems engineered for materials, which are Lower in moisture content ( > ~ % total solids), and Higher in material structure High Solids Anaerobic Digestion technology differs from traditional Low Solids (wet) technology in Material pre-treatment, processing equipment, digestion technology, design and operation.

6 Why AD for City of Edmonton? Additional organics processing capacity at Edmonton Waste Management Centre. Synergistic technical fit with composting operation for target (ICI) organics. Capital funding opportunity from CCEMC. Partnership opportunity with U of A. Use of process biogas for CHP generation. Potential GHG offsets from renewable energy used to displace grid based power and heat.

7 Climate Change Emissions Management Corporation Industries in Alberta emitting >100,000 tonnes/year CO 2 -e regulated under provincial Specified Gas Emitters Regulation (2007). Action options: Own actions to reduce emissions intensity; Purchase GHG offsets from non-regulated activities; Pay $15/tonne into provincial tech fund. CCEMC, an independent corporation, administers tech fund to provide capital grants for projects to reduce GHG emissions. Annual themed proposal calls.

8 Construction of AD facility at EWMC on ECF site. Processing of select organic waste from both residential and ICI sector. Process biogas used for on-site CHP generation. Solid digestate further processed through composting operation. Project sized at 40,000 tonnes feedstock/year, expandible to 80,000 tonnes/year. Project Description

9 COE Team Members The Triumvirate : The Money Guy The Engineer The Ops Guy Key Technical Support Staff Project engineer(s) Construction project manager

10 Renewable Energy Opportunity Project GHG Reductions Project GHG emission reductions will be achieved through: Displacement of fossil fuel sources for electrical and thermal energy, and Avoidance of landfill methane emissions through processing in High Solids Anaerobic Digestion Facility By processing 40,000 tonnes of organic wastes per year: 7.1 million kwh of net electrical and 35,542 GJ of net thermal energy is generated 16,000 tonnes of high-quality compost will be produced, and On an annual basis the project will reduce GHG emissions in Alberta by 43,000 tonnes CO 2 -e

11 Initial COE AD RFP Process Process to pre-qualify AD technology proponents. Two month (Dec 2012 Jan 2013) open RFQ 9 proponents submitted proposals Proposals evaluated on basis of: Experience; Proposed schedule; Operational suitability; and Reference checks 3 proponents short listed for full RFP

12 Short Listed AD Technologies OWS - Dranco Viessmann - Bioferm

13 Short Listed AD Technologies GICON

14 Past Project Timelines I Gleam in our eye CCEMC Proposal Call: REI and RFP spring 2012 Development & Submission of Expression of Interest to CCEMC w/ U of A September 2012 Shortlisted by CCEMC for full Proposal - December 2012 COE issued RFQ for technology providers - December 2012 Full proposal to CCEMC end February 2013 Internal COE evaluation and short listing of technology proponents from RFQ March through summer 2013 CCEMC $10 M capital grant award summer 2013 Securing of COE and U of A project funding summer 2013

15 Past Project Timelines II COE Design Build Construction Management (DBCM) RFP development and issue to shortlisted technology providers November 2013 COE RFI for CHP options March 2014 RFP closing date 24 March 2014: 3 proposals submitted, 2 deemed compliant. All proposals over budget, after evaluation, CANCELLATION of RFP.

16 The best laid schemes of mice and men often go awry ~ To a Mouse Robbie Burns 1785

17 2 nd COE RFP Process Post mortem (AAR After Action Review) of failed RFP process lessons learned Application to 2 nd RFP Process: Separation of AD system supply from construction RFPs, separate RFP for CHP infrastructure Use of NRFP process for AD system supply Retention of DBCM process for construction Understanding that sequential process above will lengthen overall project timelines

18 NRFP issued 14 Aug 2014 NRFP Proposal Call 7 proposals received by 17 Oct 2014 closing First phase evaluation by COE team plus reps from U of A and SMEs from elsewhere 5 shortlisted proponents: Bekon Gicon Veolia (Kompogas) Viessmann Zero Waste (Eggersmann)

19 Reference Facility Visits ~ Three weeks of road trip visits to short listed proponent reference facilities in Germany, Canada and USA in Dec 2014 and Jan reference facilities visited and evaluated. Re-evaluation and ranking of proposals from results of reference facility visits. Notification and beginning of negotiations with #1 ranked proponent.

20 Technology Nuances Mesophyllic or thermophyllic operation. CSTR Systems: Wetter, slurry type systems w/ mixing. Better gas production than garage type batch systems. Require dewatering of solid digestate at end for further processing. Garage Type Batch Systems Primary digestion in garages. Varying degrees of gas production in 2ndary digesters.

21 Feedstock Variations: There s SSO Too Dry Too Wet

22 And Then There s SSO About Right

23 And Then There s More SSO

24 Elegant Workspaces

25 More Elegant Workspaces

26 Garage Door Variations

27 Percolate Drain Variations

28 Secondary Digestion Issues Media Plugging

29 Integration w/ Composting the Good

30 The Good Continued

31 Integration w/ Composting the Bad

32 Integration w/ Composting the Ugly

33 Current Project Status Re-ranking of Proponent proposals completed. Currently in negotiations w/ #1 ranked Proponent. If all goes well, may be able to award spring Completion and issue of DBCM RFP (spring 2015) and award late summer Completion and issue of separate CHP RFP summer 2015 Facility design, tendering and construction thereafter. Ancillary Activities New ECF/HSADF Operating Approval application spring/summer 2015 Planning and development of external cure site in support of AD project and w/ parallel timelines fall summer 2017

34 Project Milestone Design Future Project Development Milestones Dates Explanation Deliverables Summer/Fall 2015 Detailed Design Summer-Fall 2015 Finalize concept engineering; site grading and development design; building and equipment design; design approval; equipment selection Full design and equipment delivery 50%, 90%, 100% design review Design packages issued for construction Construction Fall Spring 2017 Commissioning Spring/Summer 2017 Site grading and development; utilities; receiving and operational structures; pre-processing, digester, biogas, CHP and odour control equipment installation, generation of deficiency list; mechanical completion Vendor training; cold/hot commissioning; performance testing; start up Mechanical completion Commissioning report and start up of operation

35 Project Risks and Mitigation Risk Element Risk Mitigation Strategy Technology integration Project plan and time lines/project management Anticipated supply and construction costs Low to Medium Low to Medium Medium to High Integration by design into COE waste management system Experienced ops team fully integrated into project Experienced COE project manager Time line control mechanisms Built in schedule flexibility Potential overheated Alberta construction economy in short term Use of different procurement and project delivery method to reduce risk Social Risk Opportunity Positive impact on local waste practices through transforming material into renewable energy and beneficial soil amendment Triple bottom line benefits for ICI sector

36 Edmonton Edmonton Composting Composting Facility Facility Integrated Process and Transfer Facility High Solids Anaerobic Digestion Facility Integration at EWMC

37 Thank you..questions?