City of Baraboo Reduces Water Resource Recovery …...Final Project Cost: $2,418,500 So what? Cost...
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City of Baraboo Reduces Water Resource Recovery Facility Project Cost by Self-Performing Work
Transcript of City of Baraboo Reduces Water Resource Recovery …...Final Project Cost: $2,418,500 So what? Cost...
City of Baraboo Reduces Water Resource Recovery Facility Project Cost by Self-Performing Work
Introduction 1. Facility Overview 2. Biosolids Process Planning 1. Conferences 2. Pilot Testing 3. Facility Tours / Interview Operators 4. Final Decision Implementation 1. Design and Construction 2. Self-Performed Work Results 1. Saving Money 2. So What?
Presentation Overview
Facility Overview
Fine Screening
Selector Tanks
Biological Treatment
RAS
WAS
Effluent
Biosolids Processing
Final Clarification
Biosolids Processing
Alkaline Stabilization
• CaO + H2O = Heat + Ca(OH)2 • Class A
• pH 12+ for 72 hr • 52 ⁰ C (125.6⁰ F) for 12 hr • 50% Solids
• Class B (pH 12+ for 24 hours) • N-Viro Process
Presenter
Presentation Notes
Higher % Solids -> Less Water -> Less Lime Material Required? Is the class A vs class B sludge setting manual? Lime is for A, Kiln for B? Kinetics? Class A – no detectable pathogens, or 158 F for 30 min by overdosing with lime or using heat source Class B – reduced level of pathogens, restrictions to public access, livestock grazing, controlled crop harvest schedule.
Need for Upgrade
• Aged Equipment • Desire for higher percent solids
Presenter
Presentation Notes
Biosolids processing equipment was 24 years old. Preliminary Engineering and Planning Stage was completed by the City with rigorous pilot testing to nail down the type of processing equipment they wanted, followed by attending conferences and several plant tours, including plants that were conducting their own pilot tests. Introduce Eugene to talk about pilot testing and equipment evaluation
• Phase 1 – Conferences and Discussions • Phase 2 – Pilot Studies / Preliminary Decision Making • Phase 3 – Facility Tours • Phase 4 – Engaging the Engineer
Planning Stage
Conferences and Discussions
Pilot Studies – 2012 through 2017
Dewatering Equipment Polymer Feed System
Sludge Stabilization System
Facility Tours
Dewatering Equipment –
Sludge Stabilization Equipment –
Polymer Feed System –
Symbols
Sludge Pump –
Dane-Iowa WWTF
More Information – Phone Calls
Preliminary Decision Making & Why
1st Pilot Test – Centrysis Centrifuge, 2012 PolyBlend – Piloted in 2017
Presenter
Presentation Notes
Higher percent solids – less lime and kiln dust Less water use Locally manufactured in WI - if already decided on Centrysis Where do we do from here?
Engaging the Engineer
Pilot Testing
Plant Tours
Conferences
For the Owner For the Engineer
Discussions
Presenter
Presentation Notes
Uniqueness – Owner self performed work Owner came to Engineer, already knowing what they wanted designed Temporary sludge processing Sold belt filter press and alkaline stabilization equipment Direct purchase sludge pump and polymer skid Excavation and grading Tank pumping and cleaning Change orders: water heater shelf, asphalt
Self-Performing Work
• Temporary Biosolids Processing • Tank pumping and cleaning • Sludge Pumps & Polymer Skid – Purchase and Installation • Contract Work
• Yard pipe excavation • Curing bin work
• Assisting the Contractor • Demolition • Water heater mounting • Stair nosing welding
Set-up Temporary Biosolids Processing System
Operating Temporary Biosolids Processing System
Sludge Pump & Polymer System Installation
Construction Work Completed by the City
Additional Cost Savings
Project Cost
Contract Price: $2,399,000 Net Change Orders: $19,500 ($35,900 for electrical CO) Final Project Cost: $2,418,500
So what?
Cost Savings!
Yard Piping Excavation and Backfilling $ (14,800) Assisting with Demolition (using City equipment) $ (1,400)
Item Actual Cost Potential Cost Centrifuge Rental $5,000
$510,000 Temp Biosolids Processing Installation $2,000 Temp Biosolids Processing Set-up/Tear-down $12,000
Temporary Processing Operations $25,000 Sludge Pumps $22,105 $40,000 Polymer Skid $19,500 $23,400
Aerated Storage Tank Pumping and Cleaning $4,800 $27,800 Sold Belt Filter Press -$10,000 -
Sold CemenTech Unit -$10,000 - Sold Misc. Equip. & Scrap Metal -$14,000
TOTAL $56,255 $601,200
$466,000
$545,000
Presenter
Presentation Notes
Kyra will add a table with some costs, picture of operations team in Engineering (planning) and Construction Operator Empowerment – Eugene and his team with enjoy their job much more because of their involvement in the decision making process during the planning stage
Operations Team
QUESTIONS?
