Irvine Ranch Water District SCAP Energy Committee Meeting IRWD - PowerPoint PPT Presentation

Irvine Ranch Water District SCAP Energy Committee Meeting IRWD Biosolids Project Update August 26, 2015 1

Presentation Agenda • Introduction to IRWD • IRWD’s Biosolids Project • Construction Update 2

Introduction to IRWD

Irvine Ranch Water District A California Special District Serving Central Orange County Reliable High-Quality Water & Sewer Service Efficient. Cost Effective. Environmentally Sensitive High Level of Customer Satisfaction 4

IRWD Service Area 6 Cities Irvine Lake Forest Tustin Newport Beach Orange Costa Mesa Unincorporated Orange County 20% of Orange County Percent of the county covered by IRWD 181 square miles Size of District 5

IRWD Services Drinking Water 4 Water Treatment Plants; 27 wells; 36 reservoirs; 1,500 miles of water pipeline Sewage Collection 1,000 miles of collection pipeline Recycled Water 2 recycled water plants 500 miles of recycled water pipeline Urban Runoff Treatment San Joaquin Marsh & 23 built and 45 planned wetland treatment sites 6

IRWD Customer Base 500,000 District’s Daytime Population 340,000 Residential Customers 105,688 Service connections 93,037 Acre Feet of Water Served (FY 2012-2013) One acre-foot = 325,851 gallons = 1,233 m 3 7

Biosolids Dewatering & Energy Recovery Project Cost-effective: IRWD customers save up to $288 million. Green and sustainable: biogas used to fuel facility. Biosolids are processed into pellets and beneficially used for fertilizer or fuel. Provide facilities to meet future solids handling needs. 8

IRWD Biosolids and Energy Recovery Project Project Objectives : • IRWD to construct facilities at MWRP for:  Centralized biosolids processing  Biogas management & energy recovery  Odor control system • IRWD reduce solids treatment costs. • Maximize renewable resources and minimize environmental impacts from residuals. 9

Major Biosolids Project Components • Biosolids thickening, digestion, & dewatering • Drying to produce pellets for local beneficial reuse • Biogas conditioning • Microturbines for energy production - Use at MWWP • Three-stage odor control system plus RTO for dryer • Recycle Food Waste/FOG to generate biogas and generate energy 10

Biosolids Process Schematic DIGESTER GAS CLEANING MICROTURBINES ELECTRICITY FATS, OILS & (1 MW) BIOGAS GREASE PRIMARY DEWATERING CLARIFIER ROTARY PELLET CENTRIFUGE THICKENING DRUM STORAGE & CENTRIFUGE LOADOUT DRYER PS SECONDARY CAKE DIGESTED ACID-METHANE STORAGE & CLARIFIER SLUDGE PHASE ANAEROBIC THICKENING LOADOUT STORAGE DIGESTION CENTRIFUGE CLASS A PELLET WAS HAUL CLASS B TO LIQUID RECYCLED CAKE HAUL TREATMENT WATER CENTRATE (BACKUP) TREATMENT 11

Top View of Project Site at Completion FOG Station Solids Handling Bldg. Chemical Storage Control Polymer Digester Storage Odor Complex Centrate Treatment Power Generation 12

Digestion Facilities Step 2: Methane phase Digested Sludge Egg-Shaped Digesters Holding Tanks Digester Equipment & Control Bldg. Step 1: Acid Phase Digesters Fats, Oils & Grease Delivery Area 13

Section Through Digester & Control Building 14

Biogas & Power Generation Biogas Storage RTO Emergency Gen Set Biogas Conditioning Microturbines 15

IRWD Biosolids Project Update Key Information / Dates Contractor: Filanc/Balfour-Beatty Contract Amount: $163,465,940 Change Orders to Date (Thru CCO 31) $ 3,400,148 (2.08%) Revised Contract Amount to Date: $166,866,088 Contractual Calendar Days: 1,278 Additional Days thru Change Orders: 0 Notice of Award: April 29, 2013 Time Elapsed thru July 2015: 64.4% Contractual Completion Date: October 28, 2016 16

IRWD Biosolids Project Update Construction Schedule MILESTONE ORIGINAL REVISED per ACTIVITY June 2015 UPDATE June 3, 2013 Notice to Proceed 1 July 6, 2015 May 6, 2016 WAS & Primary Sludge Processing 2 August 20, 2015 June 29, 2016 Sludge Thickening Facilities 3 September 19, 2015 June 7, 2016 FOG Receiving 4 January 17, 2016 Anaerobic Digestion Facilities Online August 18, 2016 5 March 2, 2016 September 6, 2016 Produce Class B Biosolids (Cake) 6 June 30, 2016 September 6, 2016 Microturbine Power Generation Online 7 August 29, 2016 Produce Class A Biosolids (Pellets) December 8, 2016 Final October 28, 2016 January 22, 2017 Project Completion 17

IRWD Biosolids Project Update Aerial View of Western Half of Biosolids Site – Solids Handling Area Centrate Treatment Polymer Microturbine Area Electrical Room Room Bulk Polymer Storage Digester Gas Holder Stormwater Polymer Dryer Pump Station Room Area Liquid Sludge Sludge Chemica Wet Wells Receiving l Storage Basement 18

IRWD Biosolids Project Update Concrete Work – Southeast Corner of Solids Handling Building 19

IRWD Biosolids Project Update Installation of Carbon Steel Digester Gas Holder 20

IRWD Biosolids Project Update Bulk Polymer Storage Tanks 21

IRWD Biosolids Project Update Preparation for Coating of Liquid Chemical Storage 22

IRWD Biosolids Project Update Concrete Slab of Stormwater Pump Station 23

IRWD Biosolids Project Update Aerial View of Eastern Half of Biosolids Site – Digestion Area Methane Digester Methane Digester No. 2 Digester Gas No. 1 Holder Methane Digester Digester No. 3 Control Building Liquid Chemical Storage Fats, Oils, and Grease Sludge Holding Dewatering Feed Acid Sludge Holding Station Tank No. 1 Pump Station Digester Tank No. 2 Area 24

IRWD Biosolids Project Update Installation of Carbon Steel Plates – Methane Digesters Methane Digester No. 2 Methane Digester No. 1 25

IRWD Biosolids Project Update Installation of Carbon Steel Plates – Methane Digesters Methane Digester No. 2 Methane Digester No. 3 26

IRWD Biosolids Project Update Installation of Carbon Steel Plates – Methane Digesters Methane Digester Methane Methane No. 1 Digester Digester No. 3 No. 2 27

IRWD Biosolids Project Update Rebar Installation for First Floor of Digester Control Building Acid Phase Methane Digester Digester No. 1 No. 1 Methane Digester No. 3 28

IRWD Biosolids Project Update Construction of Acid Phase Digester No. 3 29

IRWD Biosolids Project Update Stairwell Above Dewatering Feed Pump Station 30

August 2015 Quarterly Report Planned Activities – August to October 2015 • Continue construction of Solids • Continue construction of Handling Facility and Centrate Methane Digesters, Solids Treatment Facility Holding Tanks and Acid • Start construction of the Digesters and Chemical Area Microturbine Area • Install SCE and Gas Services 31

IRWD Contact Information: Randy Lee Assistant Director of Recycling Operations (949) 453-5780 leer@irwd.com 32