Lake Ferry Wastewater Treatment
At Lake Ferry the wastewater treatment system consists of on-lot septic tanks with effluent filters and a community wastewater treatment plant. At the treatment plant, septic tank effluent flows through a packed bed reactor, a recirculation tank and ultraviolet treatment. Discharge of the treated effluent is managed to either an adjacent block of land by irrigation or to a constructed wetland, depending on the conditions of the Resource Consents.
The plant was granted new consents on 17 June 2005. A change of conditions was granted on 10 January 2011. These consents will expire on 30 September 2025.
In general, the consents allow SWDC:
- to discharge treated wastewater to land via an irrigation system at up to a maximum daily flow rate of 200 cubic meters per day and a maximum weekly flow rate of 700 cubic meters per week.
- to discharge treated wastewater to land at a maximum application rate of 3.0mm/day or up to the field capacity.
- to discharge treated wastewater to water (wetland) when the field capacity of the irrigation field has been exceeded or when a discharge is required for emergency or maintenance purposes.
- to discharge contaminants and odours from the collection, treatment and discharge facilities within the site boundary.
