Grandville CWP Egg Shaped Anaerobic Digester and Bio-gas Cogeneration

Transcription

1 Grandville CWP Egg Shaped Anaerobic Digester and Bio-gas Cogeneration Presented by: Brian Hannon, P.E., Moore & Bruggink and Todd Wibright, City of Grandville CWP Presentation Agenda Grandville System and CWP Overview Treatment Process Overview Project Overview Anaerobic Digestion and Egg Shaped Anaerobic Digester Bio-Gas Cogeneration with Combined Heat and Power System Cost/Payback Construction Photos / Update 1

2 City of Grandville Overview Grand Rapids US 196 Grandville 131 Customer Community Overview Ottawa County Georgetown Hudsonville Jamestown Jenison Blendon 2

3 CWP Expansion and Renovation Plant is at Capacity Grandville CWP Flow Analysis 85% of Total System Capacity Millions of Gallons Per Day Current Daily Flows Current Biological Capacity Design Biological Capacity Current Flow Wyoming Capacity Grandville Capacity 16 Years Since Last Expansion to System Capacity Especially Stressed During Wet Weather Flow Events Grandville Clean Water Plant 3

4 Grandville CWP System Overview (Liquid) Screening Grit Removal Primary Clarification Biological Treatment Final Clarification UV disinfection Polishing Pond Grandville CWP System Overview (Liquid) Screening Grit Removal Primary Clarification Biological Treatment Final Clarification UV disinfection Polishing Pond 4

5 Grandville CWP System Overview (Liquid) Screening Grit Removal Primary Clarification Biological Treatment Final Clarification UV disinfection Polishing Pond Grandville CWP System Overview (Liquid) Screening Grit Removal Primary Clarification Biological Treatment Final Clarification UV disinfection Polishing Pond 5

6 Grandville CWP System Overview (Liquid) Screening Grit Removal Primary Clarification Biological Treatment Final Clarification UV disinfection Polishing Pond Grandville CWP System Overview (Liquid) Screening Grit Removal Primary Clarification Biological Treatment Final Clarification UV disinfection Polishing Pond 6

7 Grandville CWP System Overview (Solids) Aerobic Digestion Anaerobic Digestion Thickening Storage Land Application Grandville CWP System Overview (Solids) Aerobic Digestion Anaerobic Digestion Thickening Storage Land Application 7

8 Grandville CWP System Overview (Solids) Aerobic Digestion Anaerobic Digestion Thickening Storage Land Application Grandville CWP System Overview (Solids) Aerobic Digestion Anaerobic Digestion Thickening Storage Land Application 8

9 Project Overview (Expansion and Renovation) 9

10 Liquid Side Expansion Liquid Side Expansion 10

11 Liquid Side Expansion Liquid Side Expansion 11

12 Liquid Side Expansion Liquid Side Expansion 12

13 Liquid Side Expansion Liquid Side Expansion 13

14 Solids Handling Expansion Solids Handling Expansion 14

15 Solids Handling Expansion Solids Handling Expansion 15

16 Anaerobic Digestion History Theory Types Class A vs. Class B Bio-solids Anaerobic Digestion History Theory Types Class A vs. Class B Bio-solids 16

17 Why Egg Shaped Anaerobic Digester (ESD)? Process Footprint Cost (life cycle) - cleaning - efficiency Client comfort Ability to go to Class A Why Egg Shaped Anaerobic Digester (ESD)? Process Footprint Cost (life cycle) - cleaning - efficiency Client comfort Ability to go to Class A 17

18 Why Egg Shaped Anaerobic Digester (ESD)? Process Footprint Cost (life cycle) - cleaning - efficiency Client comfort Ability to go to Class A How the ESD Works: 18

19 How the ESD Works: How the ESD Works: 19

20 How the ESD Works: Design Summary: Sludge Feed Rate (Primary and WAS) = 66,000 gpd Expected VSS Reduction = 60%+ Actual VSS Reduction (during startup phase) = 67% Expected Gas Production = 117,000 cuft/day = 70.2 MMBTU/day 20

21 Bio-Gas Storage Bio-Gas Storage 21

22 Bio-Gas Discussion Energy Content of Methane (Bio-gas) vs. Natural Gas Contaminants - Hydrogen Sulfide - CO2 - Siloxanes Gas Cleaning Skid Unison Solutions 22

23 How to use Cleaned Bio-gas? Cogenerate - Heat and Power Boiler - Supplemental Heat Flare - Safety Applicable Types of Cogeneration Systems Fuel Cells Microturbines Internal Combustion Engines 23

24 Applicable Types of Cogeneration Systems Fuel Cells Microturbines Internal Combustion Engines Applicable Types of Cogeneration Systems Fuel Cells Microturbines Internal Combustion Engines 24

25 I-power 280 Cogen Unit Dual Fuel (bio-gas and natural gas) kw using Bio-gas, kw using Nat Gas Internal exchangers to capture heat from engine cooling jacket and exhaust Efficiency of 86% Power What is power used for? How to get to Equipment? 25

26 Heat Costs vs. Payback Cogen System Costs Expected power savings per year at start up rates: $95,000 Expected gas savings per year at startup rates: $47,000 Total expected savings per year at startup rates: $142,000 Expected payback for cogeneration system: 7.8 years (maximum) 26

27 Pictures and Facts ESD and Digester/Blower Building Basement Foundation Pictures and Facts 27

28 Pictures and Facts 42 Thick Concrete Base Slab Pictures and Facts Egg Cup and Basement Walls 28

29 Pictures and Facts Pictures and Facts Digester Blower Building Block Walls 29

30 Pictures and Facts Pictures and Facts Egg Skirt and Building Shell 30

31 Pictures and Facts Egg Sheets Being Erected Pictures and Facts Egg Exterior Egg Interior 31

32 Pictures and Facts Top Cone Section Pictures and Facts Lifting Draft Tube and Piping assembly into place 32

33 Pictures and Facts Topping The Egg Pictures and Facts Putting Insulation and Coating onto ESD Exterior 33

34 Pictures and Facts Picture of Painted Egg and Day Storage Tank Pictures and Facts 34

35 Pictures and Facts Piping Gallery Under the ESD Pictures and Facts 35

36 Pictures and Facts Pictures and Facts 36

37 Thanks! Questions? Todd Wibright (616) Brian Hannon, P.E. (616)