Greywater/ Blackwater Recycling

Applicability to Development Area 6

TA85

Toyota WA Corporate Headquarters • Blackwater recycling

system utilised for toilet flushing, irrigation and vehicle washdown

• Venue for 2014 City of Belmont Business Environmental Awards

– Lunchtime, Wednesday 10 September

TA86

Considerations

• Environmental impacts - closed system preferred

• End use for treated water – ideally a business/industrial supply option with consistent demand; if released to the environment (eg irrigation) then additional treatment requirements apply

• Community education - before, during construction and long-term education pathways; the less responsibility placed on residents the better

TA87

Considerations- legislation • Approvals - detailed background

research required to identify: – Health and environmental issues – History/ experience of the

technology supplier – Site issues requiring protection

(i.e. water table levels, protected sites)

– End use options – Responsibilities for maintenance

and operation – Funding (initial and ongoing)

TA88

Local case studies • Meadow Springs Regional Open Space and Seascapes

Parks: Treated wastewater is placed in infiltration ponds and seeps into the underground aquifer. Groundwater bores pump the treated wastewater for irrigation Water Corporation charged fee for water abstracted (per kL)

• Murdoch University: Demonstration of decentralised wastewater recycling in urban villages (Premier’s Water Foundation Project) greenfield, low density developments

http://www.water.wa.gov.au/PWF_03404_BS_HT.pdf?id=236 – National Lifestyle Villages; Bridgewater Estate and Timbers

Edge: greywater village scale systems – NLV Banksia Grove: blackwater system.

TA89

Limitations • Additional cost compared to standard sources:

– To developers for initial infrastructure – Ongoing cost to Strata Group for treatment measures, maintenance,

monitoring and cross connection checks – To water consumer

• Limited pool of qualified installers, operators and system maintainers

• Securing end users of treated water- requires consistent demand (ie. not dependent on season)

• Complex legislative and regulatory framework • Reliability of system in meeting environmental and public health

requirements

TA90

Development Area 6 • Ultimate residential dwelling yield

estimated at up to 2,000- 3,600 dwellings – Medium scale- wastewater

treatment system – Requires management by LG

authority or wastewater authority

• Redevelopment will occur incrementally and over a long period of time

• Lack of suitable end use of treated wastewater

• Small scale (<500 dwellings) can be managed by Strata Body

TA91

Future Opportunities • Potential incorporation of greywater/ blackwater

recycling within proposed community facility at future Brearley Park.

• PAPL to incorporate greywater/ blackwater recycling in airport commercial premises/ terminals

• Potential density bonus for residential developers incorporating greywater recycling- take up unlikely based on experience with The Springs

TA92