Rotoma & Rotoiti

Rotoma & Rotoiti
WWTP & Land Disposal System Concept Design

We investigated options for a sewerage scheme for the lakeside communities of Rotoiti and Rotoma and subsequently developed a concept design for a WWTP and LDS utilising chemically assisted membrane bioreactor (MBR) technology and disposal to a rapid infiltration trench system.

We have subsequently undertaken a detailed design of the $15M wastewater collection and conveyance system which has utilised a septic tank effluent pump (STEP) system and a series of transfer pump stations and rising mains. We have also undertaken a detailed design of a UV disinfection system to allow for offsite beneficial reuse of the treated effluent from the MBR-based WWTP. A feature of the project has been the development of the options, design and construction requirements to align closely with local iwi values.

Rotoma Rotoiti Reticulation Scheme1 TINY

Rotorua Lakes Council



2014 - 2020

Key Aspects
  • Options assessment
  • Concept development
  • Stage 2 hydrogeological investigation
  • Technical consent assistance
  • Detailed design of reticulation
  • UV disinfection