technical sustainability indiana regional sewer district association october 26, 2015 joe tierney
TRANSCRIPT
Technical SustainabilityIndiana Regional Sewer District
Association October 26, 2015
Joe Tierney
Sustainability
• “Sustainability is the capacity to endure”
• “Technical Sustainability for RSD means using BMPs for utility management combined w/current technologies to get the most out of your utility system.”
What is Sustainability?
Maintain what you
have.
Minimize what you
build.
IRSDA Mission
Be supportive and share Information that :•Protects the Environment•Protects Public Health •Supports Economic Development•Provides a Public Convenience
Sustainably Managed
Utility
Sustainably Managed Utility• Stakeholder Understanding and Support (SS)
– Customers, regulators, community
• Service Quality (SQ)– Meet regulations, public health, ecological needs
• Customer Satisfaction (CS)– Reliable, responsive, affordable
• Staff Development (SD)– Competent, motivated, adaptive workforce
• Operational Optimization (OO)– Ongoing, timely, cost-effective, reliable, sustainable
Sustainably Managed Utility
• Operational Resiliency (OR)– Leadership & staff working together
• Infrastructure Stability (IS)– Understand condition & costs of critical infrastructure
• Financial Viability (FV)– Life cycle cost, balance debt, assets, O & M, revenues
• Community Sustainability (CS)– Long-term watershed, community health & welfare &ED
• Water Resource Adequacy (WA)– Protect Watershed & meet current & future sanitation
needs
Service Quality and Regulatory Compliance
• Permits & Compliance
– IDEM, IDNR, INDOT, Rule 5
– NPDES, Land App. Stormwater
– MRO & Overflow reports
– Safety/ OSHA
• Engineering & Construction Standards
• Stay current w/ regulations
Customer Satisfaction • Utility Services
– Reliable
– Responsive
– Affordable
– Interaction w/Stakeholders
– Request & receive customer feedback
Staff Development & Stakeholder Support
People are assets too!• Recruit & Retain
• Resource of system knowledge & history
• Licensing & certifications
• Career enhancements
• Training & Safety programs
• Personal relationships
Infrastructure Stability
• System Inventory & Mapping
• Conditional Assessments
• Preventive Maintenance
• Capital Improvement Plans
• Energy Planning
Infrastructure Stability“you need to know your system”
• Inventory & Mapping
– Traditional As-Builts
– GIS system
– Google Earth
• Conditional Assessments
– Equipment inspections
– In-situ- video inspections of pipe systems
Infrastructure Stability“Preventive Maintenance & Planning go together”
• Preventive Maintenance
– Clean & flush sewers
– Protective coatings
– Pump & equipment service
– Maximize efficiency & service life & reduce $$
Infrastructure Stability“Preventive Maintenance & Planning go together”
• Capital Improvement plans
– Identify system needs
– Identify new technologies
– Anticipate regulatory changes
– Estimate future OM&R requirements
– Estimate energy savings with new technology investments
– Life cycle cost comparisons
Infrastructure Stability“Energy is a big part of annual operations cost”
Technical Sustainability Examples
Collection System“maintain what you have”
• Leaky sewers cost $$ • Excessive I/I
– Steals capacity – Causes SSOs– Triggers regulatory
actions
• Sewer rehabilitation – Cured-in-place pipe
(CIPP) – Green alternative
• Reduces I/I• Adds capacity, customers &
revenue• Extends service life
Green AlternativesWhy Should You Care?
• Sustainability incentive• SRF interest reduction up
to 0.5%• Improved ranking • I/I for energy reduction• Lighting• SCADA• VFDs• Life cycle cost analysis
• PV = $1,000,000
• 4.00% vs. 3.50%
• Annual savings $10,067
• 20-yr savings $201,334
Pumping
• VFDs for flow control and energy savings
• Jockey pump w/big pump
• Protective coatings for structures
• Back-up generators– Fuel types natural gas,
diesel
Plant Examples
• Cost savings
– Energy
– Chemicals
– Maintenance
• Back-up power sources
Plant Examples
• Natural lighting & Building lights
• Instrumentation
• Building insulation
• Sludge recycle/reuse
• Low mow grasses
D.O. Probes & VFDs for Blowers0.4 MGD EA WWTP energy cost savings
Current Proposed
Yr-1 blower = $47k Yr-1 blower = $25k
Yr-20 blower = $125K Yr-20 blower = $67k
Total 20-yr = $1.69 M Total 20-yr = $908k
• Total savings $782k• Payback period 11 years
Phosphorus treatmentChemical savings
Chemical Biological w/chemical backup
On-going cost increases Process & operations adjustments
Add. sludge generation New equipment & tankage
Long-term cost estimates
Reduced chemical usage & sludge generation
Compare •Capital & annual costs•Estimate payback period
U.V. equipment upgradesNew technology
• Old equipment
• High energy use
• Manual cleaning
• High labor
• New equipment • Lower energy use• Self cleaning • Low labor
Adequate Utility Rates“none of this is possible without adequate rates”
• Labor & energy cost increase / inflation
• Aging system maintenance
• Repairs & replacements
• New regulations
• Capital improvements
• Periodic rate adjustments
Technical SustainabilitySummary
• Stay current w/ rules & regulations
• Customer satisfaction
• Staff & Stakeholder support
• Know your system
• Preventive maintenance & planning
• Sufficient rates & charges
Reference Sources
• Institute for Sustainable Infrastructure (ISI)– sustainableinfrastructure.org– envision rating sheet
• USDA Rural Development– water.epa.gov/infrastructure
• LEED – Leadership in Energy & Environmental Design• State Revolving Fund Loan program
• Green Project Reserve / Sustainability Incentive Fact Sheet– www.Watereum.org
Check Up Program for Small Systems (CUPSS)
• 16,000 ww systems– 70% serve <
10,000 pop
• 134,000 dw systems serve < 3300 population
http://www.epa.gov/cupss/index.html
References
