Tasman District Council - Upgrade of Motueka Wastewater Treatment Plant

Decision Released: Friday 20 November 2015

Application Documents

Commissioner's Decision
Application Documents

Background

The proposed upgrade includes:

  • partitioning of the existing oxidation pond to reduce short-circuiting thereby improving treatment;
  • increasing aeration to enhance treatment capacity and ammonia removal;
  • addition of floating wetland areas in the final pond to reduce suspended algal growth by blocking sunlight;
  • installing membrane filtration to provide a final polishing and high quality disinfection of the wastewater prior to discharge;
  • installing a pipeline to transfer treated wastewater directly from the membrane filtration plant through a diffuser for a controlled discharge in the south branch of the Motueka River mouth, close to the existing uncontrolled discharge location;
  • removing the soakage beds and wetlands from the treatment train, and the uncontrolled wetland discharge will cease.

This proposed upgrade will exclude use of the existing soakage beds and wetland.  It will improve the quality of the treated wastewater, by reducing BOD (biochemical oxygen demand), TSS (total suspended solids), nitrogen and microbiological contaminant concentrations.

Application Details

Applicant

Tasman District Council - Engineering Services Department

Applicant’s Address for Service

Engineering Department, Private Bag 4, Richmond 7050

Location

Motueka Wastewater Treatment Plant at 1 Thorp Street, Motueka; and in south branch of the Motueka River mouth

Legal Description

Pt Sec 29 Motueka Rural District; Marine and Coastal Area

Consent Type, Application Number and Proposal

Discharge Permit (RM141088)

Discharge Treated Wastewater into the Coastal Marine Area via the outfall pipeline.  Discharged wastewater will be treated via a membrane filtration plant.

Water Permit (RM141089)

To take water for dewatering during construction of the pipeline and surge chamber.

Discharge Permit (RM141090)

Discharge of dewatering water to water during construction of the pipeline and surge chamber.

Discharge Permit (RM141091)

Discharge of odour to air from the Wastewater Treatment Plant.

Coastal Permit (RM141092)

Coastal Occupation and Disturbance - To disturb the foreshore and seabed and occupy the Coastal Marine Area by the proposed outfall pipeline.

Links

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