Post on 15-Mar-2020
City West Water’s
Business Resource Efficiency Program
Cameron FitzGerald
General Manager Service Sustainability
Melbourne, Australia
Λ Capital city of State of Victoria
Λ Size: 8,806 km2
Λ Population: 4.25 million
Λ Manufacturing hub
City West Water Λ Victorian State Government owned and run
on commercial basis
Λ Provides water, sewage, trade waste and
recycled water services to 389,551 customers
Λ 37,210 (around 10%) of customers are
commercial, industrial and institutional
Λ Service area includes industrial hub and
Melbourne’s CBD
Λ Approximately 40% of the 103,000 ML
(27,210 Mgal) per year of water supplied
within the catchment is to CII customers
Λ 10/28/2014
City West Water 4 2013 population
4.25 million 1991 population
2.5 million
1933 population ~ 1 million
City West Water’s Ongoing
Commitment to Water Efficiency
Λ CWW strategic goals:
• Efficient water users
• Clean and efficient producers
Λ Maintained core groups of water efficiency expertise
Λ Support Government’s new approach
• Melbourne’s Water Future
• Integrated water cycle management central part of plan
Drivers for Establishing the
Business Resource Efficiency Program
Λ Initiated in 2003 to assist business customers to:
• Improve water use efficiency in Melbourne’s Top 200 water users in
response to severe drought – CWW had 104 of these customers
• Reduce salt (total dissolved solids) and other critical contaminants in
trade waste discharge to enable use of recycled water in agriculture
Early program Λ Salt reduction plan and water efficiency with industrial
customers successful
• Building on relationships established through industrial and
business wastewater (trade waste) management
• Some great early wins
Λ Water efficiency with other commercial customers in Top
104 not so successful
• Difficulty engaging them with the service offering
• Expensive “War and Peace” audit
• Solutions not meeting customer need – flow control valves!
Program Design – keys to success
Λ Customers want a level of certainty of success to engage in process
Λ Simple audit with high level prioritised opportunities – waterMAP –
low or no cost
Λ Trusted and knowledgeable expert – staff or plumber to help them
identify opportunities
Λ Help to over come the barriers to implementation –expert advice, R
and D, information, behavioural change materials
Λ Benchmarking – how they compare to others of similar ilk
Λ Incentives –rebates or tailored grants and with ease of access
Λ Promotion and recognition of achievements
Λ Relationships above all, established, developed and nurtured
Expert Advice, Information, and
Behavioural Change Materials
Research & Development Λ Program assists customers to investigate
barriers to water efficiency and recycling
Λ Projects conducted in conjunction with:
Λ Customers
Λ Universities
Λ Research institutions
Λ Government agencies
Λ Industry associations
Λ Projects can be:
Λ Customer specific
Λ Industry sector based
Λ Metropolitan wide
National Business Water Efficiency
Benchmarking Project (NBweb)
Λ Scope: To develop and display national sector
specific water efficiency benchmarks
Λ Cost: $AUD360,000 + in-kind
Λ Outcomes:
Λ Benchmarking methodology
Λ Website and portal www.nbweb.com.au
Λ 40 industry and climate specific benchmarks
Λ Learnings:
Λ Need many water utilities involved
Λ Difficulty in getting customer data to create
benchmarks – greatest opportunity while
customers are engaged during drought!
Promotion of Customer
Achievements
Λ Case studies
Λ Publications such as Liquid Assets
Λ Website
Λ External publications and conferences
Λ Resource Efficiency Seminar
Customer Engagement
Λ One on one relationship still most important
Λ Person to do the initial investigations for them
Λ Present them with opportunities and ways to realise them
Λ Reduce red tape, bring funding opportunities to their desk
Λ Quick wins important
Λ Demonstrate how they can achieve $$ savings
Λ Different tools for different business sizes
Results - Water
Water reduction of 16.2 billions litres (4.3 billion gallons) per year compared to 00/01 levels
-
10,000
20,000
30,000
40,000
50,000
60,000
2000/01 2001/02 2002/03 2003/04 2004/05 2005/06 2006/07 2007/08 2008/09 2009/10 2010/11 2011/12 2012/13
ML
Year
Non-residential water use (ML)
CWW Below 10ML CWW Above 10ML waterMAP
Melbourne’s Water Cycle Nexus
Source: Adapted from Natural Resources Defense Council March 2009
Minimal treatment
• Disinfection
• Fluoridation
• pH correction
• Sea water desal
Source: Photos courtesy of Melbourne Water
Thermodynamic processes:
• Heating
• Cooling
&
Targeted Programs
• Programs developed for specific equipment, processes or industry sectors
• Developing program ideas:
• Look for common equipment/processes across industry sectors
• See what customers have done already
• See what other water (and energy) utilities have done
• Partnerships
Steam System Efficiency Program Λ Scope: Improve water and energy efficiency of steam systems
Λ Cost: Total project $AUD230,000, including partner funding $AUD50,000
Λ Methodology:
Λ Provide free audits
Λ Train operators to identify improvement opportunities
Λ Produce reports quantifying water/energy/chemical savings
Λ Help customers to implement saving opportunities
Λ Savings identified:
Λ 239 ML (63.1 Mgal) water per year
Λ 187,000 gigajoules (1,772,418 therms) gas per year
Λ 1 0,400 tonnes CO2-e per year
Λ Implemented savings to date:
Λ 10 ML (2.6 Mgal) water per year
Λ 14,900 gigajoules (141,225 therms) gas per year
Λ 784 tonnes CO2-e per year
Λ Winner 2012 AWA National Program Innovation Award
Cooling Towers Efficiency Program
Λ Scope: To assist businesses to optimise water savings through self management rather than
capital investment
Λ Project Partners: Victorian government, Australian Institute of Refrigeration Air-conditioning and
Heating
Λ Outcomes:
Λ Free cooling tower efficiency assessments
Λ AIRAH training course
Λ Guidance material on water efficiency incorporated into
standard cooling tower operating procedures
Λ On-line calculator www.mycoolingtower.com.au
Λ Check-meters to optimise water efficiency
Λ Assessment outcomes integrated into waterMAPs
Λ Potential savings1.7 billion litres (0.45 billion gallons) per year
Λ Learnings:
Λ Cooling towers more inefficient in regional areas
Pre Rinse Spray Valves Λ Scope: Exchange inefficient PRSV using 10-15 litres/min to efficient PRSV using 4-6 L (1-1.6
gal) per min
Λ Cost: $AUD146,147 for 367 PRSV
Λ Technology: Fisher Rinse-maid spray valve
Λ Methodology:
Λ Identify customers with inefficient PRSV
Λ Plumber exchanged PRSV
Λ Savings:
Λ 23.9 ML (6.3 Mgal) per year
Λ 3,129 GJ (29,657 therms) per year
Λ 160 tonnes CO2-e per year
Λ Learnings:
Λ Customers requiring hose and adaptor exchanges were greater than anticipated
Λ Opportunities for “white certificates” for carbon reductions to improve business case
Showerhead Exchange
Λ Scope: Provide water efficient showerheads to businesses
Λ Cost: $AUD15 - 37 per showerhead
Λ Methodology:
Λ Provide free showerheads to customers
Λ Customer installs and return inefficient showerheads
Λ Potential offset on cost with “white certificates”
Λ Estimated savings:
Λ 11,500 showerheads exchanged
Λ 182 ML (48 Mgal) water per year
Λ 24,000 GJ (227,476 therms) gas per year
Λ Learnings:
Λ Showerheads provided to residential customers were not
always suitable for business customers (hospitals and
hotels)
Water and Energy Audits Λ Scope: Provide free water and energy audits to small businesses
Λ Cost: $AUD185 per audit
Λ Methodology:
Λ Leveraged other government programs to deliver water and energy efficiency audits
at no cost to the customers
Λ Engaged contractor to conduct audits
Λ Contractor produced report and obligation free quote
Λ Outcomes:
Λ 202 audits completed
Λ Identified water and energy savings 381 ML (101 Mgal) and 25.307 GWh per year
respectively
Λ Learnings:
Λ Customers don’t want to pay for an audit – no guarantee that opportunities will be
identified
Λ Most customers are time poor – practical advice important
Λ Risks engaging contractors but contractors use as opportunity for follow-up
business on installs
Resource Efficiency Assist
Λ Scope: Assist customers to improve water, energy and materials efficiency
Λ Project Partners: Australian Industry Group and Sustainability Victoria
Λ Methodology:
Λ High level business assessment
Λ Level 1 equivalent to focus on areas of greatest potential
Λ Master classes
Λ Showcasing (site tours)
Λ Learnings:
Λ Partnerships can enhance expertise of water utilities and deliver wider
benefits to customers
Co-funded Projects
• Co-funding for site specific projects
• Encourages implementation of projects by improving business case
• Low administrative burden
• Facilitated implementation of over 100 customer water efficiency projects
• Lifetime water savings over 28 billion litres (7.4 billion gallons)
• Leveraged customer funds more than 4:1
Moonee Valley Racing Club
Stormwater Harvesting
Λ Scope: Expanded stormwater harvesting system for
racetrack irrigation
Λ Cost: Total project $AUD344,760, CWW funding
$AUD172,380
Λ Payback: estimated 4.6 years, actual 2 years
Λ Savings:
Λ 60 ML (15.9 Mgal) water per year (estimated savings
were 42.7 ML per year)
Λ No potable water used for track irrigation this year
Λ Hard rubbish and nitrogen diverted from local creek
Encore Tissue
Wastewater Filtration System
Λ Scope: Installation of wastewater filtration system to make
water suitable for reuse in tissue making process
Λ Cost: Total project $AUD800,000, CWW funding
$AUD181,268
Λ Payback: estimated 2.1 years, actual 1.4 years
Λ Savings:
Λ 166 ML (43.9 Mgal) water per year (estimated savings
115 ML per year – production increase)
Λ 142 ML (37.5 Mgal) trade waste per year
Λ Recovery of paper fibres for reuse
O-I Glass
Cooling Tower Replacement Λ Scope: Replacement of existing cooling towers with those
that operate on ambient air temperature and variable
speed drives
Λ Cost: Total project $AUD443,000, CWW funding
$AUD195,000
Λ Payback: 3 years
Λ Savings:
Λ 22 ML (5.8 Mgal) water per year
Λ 440,000 kWh electricity per year
Λ 550 tonnes greenhouse gas emissions reduction
Λ Legionella risk reduced, chemical use eliminated
Λ Exceeding O-I’s global benchmark for water use
Tollman Chemicals
Clean In Place Λ Scope: Change tank wash method
Λ Cost: Total project $AUD18,500, CWW funding
$AUD5,500
Λ Technology: Fluid driven orbital high pressure
cleaning nozzle and high pressure pump
Λ Savings:
Λ 4.16 ML (1.1 Mgal) water per year
Λ 1 terajoule (9,480 therms) gas per year
Λ 50 tonnes CO2-e per year
Λ 1.5 tonnes TDS discharge per year
Λ 676 hours downtime per year
Sugar Australia
Phosphate Removal
Λ Scope: To install centrifuging process removing calcium phosphate in the effluent
Λ Cost: Total project $AUD850,000 with Government funding $AUD340,000
Λ Payback: 2 years
Λ Savings:
Λ 188 tonnes TDS/yr, ($4.5/ T)
Λ 51 tonnes of phosphate removed from WTP
Λ 13 ML (3.4 Mgal) potable water saved through
on-site reuse of “sweetwater”
Λ ‘Sweetwater’ for reprocessing
Λ Phosphate Cake suitable for composting
Oxford Cold Storage
Rainwater Harvesting
Λ Scope: Rainwater harvesting system to substitute with
potable water for use in the cooling towers
Λ Cost: Total cost $AUD1.22 million with CWW funding of
$AUD227,594
Λ Savings:
• Reduced water consumption despite 35% increase in
cooling capacity
• Water savings of 20 ML (5.3 Mgal) per year
101 Collins Street
Toilet Replacement Λ Scope: To replace single flush toilets with efficient dual flush toilets
Λ Cost: Total project $AUD750,000 with CWW funding $AUD150,000
Λ Payback: 15.3 years
Λ Savings:
Λ 14 ML (3.7 Mgal) water per year
Λ Similar volumes in sewage discharge