From the Flintstones to the Jetsons

From the Flintstones to the Jetsons:
WWTP Improvements and Beyond in Dundee,
Oregon
Heather Stephens
February 4, 2015
Dundee, Oregon
Dundee
Portland
Existing Dundee WWTP
LAGOON 1
LAGOON 3
LAGOON 2
Pump Station
Chlorine
Building
Improvement Drivers
Improve Treatment Performance
Reclaim Site for Beneficial Use
Provide Capacity for Growth
Proposed Solution
Improve Treatment Performance
Provide Capacity for Growth
Reclaim Site for Beneficial Use
The Need
Flow Condition
Average Annual
2010 Flow 2031 Flow
(MGD)
(MGD)
0.37
0.67
Average Dry Weather
0.29
0.52
Maximum Month
0.67
1.38
Peak Day
1.25
2.00
Peak Instantaneous
2.05
2.75
Interim 2021 Condition used for Equipment Phasing
Summary of Improvements
Our presentation focuses on the following categories:
Biological Process Design
Biological Process Design:
Influent Loading
3000
Pounds/Day BOD
2500
2000
Average - Domestic
1500
Max Month - Domestic
Max Month - Combined
1000
500
0
Startup
2021
2031
Biological Process Design:
Influent Loading
7000
Pounds/Day TSS
6000
5000
4000
Average - Domestic
3000
Max Month - Domestic
Max Month - Combined
2000
1000
0
Startup
2021
2031
Biological Process Modeling
Low Flow/Load
Cold Weather
2 Basin Operation
High Flow/Load
Average Weather
4 Basin Operation
Biowin Model
Headworks
New Screening and Electrical Buildings
Parkson Basket Screens
Fully Redundant
Quad Submersible Pump Station
Flygt Submersible
High/Low Flow FMs
Trench Style Wet Well
Odor Control
Process Basins
Multi-Train
Expandable
Flygt Submersible
Aquarius Diffusers
Wilo Mixers
Aerzen Turbo
Blowers
ETS UV System
Ovivo Membranes
Class A Recycled
Water
Basin Layout
EQ
Anoxic
Cell
Swing
Aerobic Cell
Cell
(Future
Membranes)
RAS
Membranes
Permeate
EQ
Cell
Swing
Cell
Aerobic Cell
Raw Influent
Anoxic
(Future
Membranes)
Membranes
Aerobic and MBR Cells
MBR/Mechanical Building
ETS UV
Medium Pressure,
High Intensity
Aerzen Turbo Blowers
(4) 50HP, (1) 25HP
Facultative Sludge Lagoons
5 Year Sludge
Storage per FSL
60 mil HDPE Liner
Two cells to
facilitate disposal
FSL Construction
Startup: Seeding
Equipment Checkout June/July 2012
Clean Water Testing July 9-13
Wastewater Startup July 23/24
Req: 3,500 mg/l in MBR = ½ Q permeate
Influent : 200 mg/l TSS
Sludge growth rate (approx 200 lb/d)
City of McMinnville
65,000g @ ~7,000 mg/l
Lagoons remained online
Startup: Filling & Testing
Intermittent air pulsing
Level control
Managed process to
maintain 3,500 mg/L MLSS
Startup: Permeating
Outfall
Year Round Discharge into Lagoon 4
Multi-Depth intakes to discharge cooler water
Split Compliance Permit
Project Cost Summary
Engineer’s
Change % Change
Estimate Bid Price Order
Order
Total
WWTP
$9,200,000
$9,352,000
$34,200
0.37%
$9,386,000
Outfall
$500,000
$484,000
$14,900
3.1%
$499,000
$9,836,000
$49,100
0.5%
$9,885,000
Total
New Opportunities
Reclaim WWTP Site
Nature/Trail Park
Wildlife
Spotted and Painted
Turtles
Migrating Birds
New Opportunities
New
Development
Infill
WWTP Brings Opportunities
Can R1 Water Can Fill the Gap?
Potential Demands Met with R1 Water
Parks/Public Property
Future Commercial/Industrial
Future Toilet Flushing
R1 Water: Part of Solution
Portfolio Approach
Conservation/Loss Reduction
Recycled Water Program Development
Implement RW Rules & Standards
Rate/SDC Study
Engage Public
WWTP Investment Supports
Broad Community Benefit
Provides high-level treatment for
$10/gallon
Reclaims site for public and
environmental benefit
Supports City growth with diverse
water supply
Heather Stephens, P.E.
[email protected]
503-423-4050
Conceptual Pile-Support
Foundation
87 piles at approx 12 ft. on
center
Pile depth approx. 93 feet
total, Hdwks-18
Piles driven through upper
liquefiable soils into
Troutdale formation (at ~ 50
feet)
Base of MBR 6’ below grade
Mechanical/Electrical Rooms
at Existing Grade
Pile Supported Foundations
Auger Cast
Mix Design
5,000 psi
Slump 10”+/-2”
Admixtures
Superplasticizer
Water Reducer
Pile Supported Foundations
Construction Challenges
Dangerous Work
High Plasticity Soils
Short Placement window
~7/day
2 min/10 max
Construction Challenges
Quality Control
Calibrated Pump
Allowable Tolerances
Horizontal = 3” +/Vertical = 2.5” in 10’