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�� LandLand--base water treatment systembase water treatment system
�� Upon final filtering and UV Upon final filtering and UV disinfection, the flow is disinfection, the flow is transferred to transferred to PuketutuPuketutuIsland, where the channel Island, where the channel feeds into the 17 hectare feeds into the 17 hectare feeds into the 17 hectare feeds into the 17 hectare intertidal storage basin.intertidal storage basin.
�� Has the capacity to cater to Has the capacity to cater to Auckland’s growing capacity.Auckland’s growing capacity.
�� Provide significant environmental Provide significant environmental benefits to benefits to ManukauManukau HarborHarbor
�� Improves the EnvironmentImproves the Environment
�� Provides bathing water quality to Provides bathing water quality to discharge into harbordischarge into harbor
�� 500 hectares of oxidations ponds and 500 hectares of oxidations ponds and sludge lagoons returned to a natural sludge lagoons returned to a natural harbor environmentsharbor environments
�� 13 km of coastline also improved13 km of coastline also improved
Biggest coastal restoration effort in New Biggest coastal restoration effort in New �� Biggest coastal restoration effort in New Biggest coastal restoration effort in New ZealandZealand
�� Odor Boundary established and upheldOdor Boundary established and upheld
�� Treatment cycle reduced from 21 days to 13 Treatment cycle reduced from 21 days to 13 hourshours
�� Haven for thousands of migrating birdsHaven for thousands of migrating birds
�� Bird roosts built for birds resting while tide covers their feeding Bird roosts built for birds resting while tide covers their feeding groundsgrounds
Technical Issues and InnovationsTechnical Issues and InnovationsTechnical Issues and InnovationsTechnical Issues and InnovationsTechnical Issues and InnovationsTechnical Issues and InnovationsTechnical Issues and InnovationsTechnical Issues and Innovations
�� Transformed the old Mangere Wastewater Treatment PlantTransformed the old Mangere Wastewater Treatment Plant
�� 5 year project, treatment processes have been replaced5 year project, treatment processes have been replaced
�� Plant reduces the treatment cycle for wastewater from 21days Plant reduces the treatment cycle for wastewater from 21days �� 13 hours 13 hours
■ Fine screens: From 19mm� 3mm gaps between barsExtraction of inorganic material has increased from 1�5 tonnes/day
■■ Filtration (10 massive filters)Filtration (10 massive filters)■■ Particles > 15µm (=Particles > 15µm (=1515 1010−6−6 m) m)
■■ UV disinfection UV disinfection plantplant��largestlargest in the world in the world (10,000reduction in viruses)(10,000reduction in viruses)■■ 12 parallel channels12 parallel channels■■ 7776 UV lamps7776 UV lamps
■■Treatment plant required to be Treatment plant required to be fully operational during fully operational during constructionconstruction
■■Local Government Act Local Government Act ––■■Local Government Act Local Government Act ––Statement of Corporate IntentStatement of Corporate Intent
■■Nine separate management Nine separate management plansplans
■■Resource Management Act Resource Management Act ––Very strict conditions such as:Very strict conditions such as:
■■ 16 species in New Zealand.16 species in New Zealand.■■ Huge nuisance factor.Huge nuisance factor.■■ Monitoring and surveys required.Monitoring and surveys required.■■ Use of control sprays Use of control sprays –– Section 15 of Resource Section 15 of Resource
Management ActManagement Act■■ “Code of Practice for the Management of “Code of Practice for the Management of
Agrichemicals”Agrichemicals”
■■Final Filtering and Final Filtering and UV Disinfection.UV Disinfection.
■■Runs along main Runs along main effluent channel.effluent channel.effluent channel.effluent channel.
■■Water, after Water, after upgrade, is of high upgrade, is of high enough quality for enough quality for shellfish and even shellfish and even swimming. swimming.
■■ Treaty of Waitangi Treaty of Waitangi Claim.Claim.
■■ Maori People.Maori People.
■■ Brought back Brought back previously destroyed previously destroyed fishing grounds.fishing grounds.