Stage 1 Irrigation Area_90 Beach Rd Noosa North Shore 12.06.2020 · MCU19/0117

EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1 )
NOOSA NORTH SHORE ECO-TOURISM PORTAL q Cardno

 

2:

PROPOSED SEWAGE TREATMENT PLANT
2:1 Design Flows

The predicted volume of wastewater requiring treatment for Stages 1 to 4 of the
proposed development at full occupancy has been estimated as 67.6 kL/day. This is
based on a total EP of 483 following completion of Stage 4 of the proposed
development and a rate of 140L/EP/day.

The STP will initially be constructed to provide treatment facilities and disposal by
irrigation for the wastewater generated from Stage 1 of the development. This will
comprise a design loading of 15.6kL/day. A second module will be added to the STP at
an appropriate time to treat wastewater generated from Stages 2 to 4 of the
development. Table 1 below shows the design occupancy rates and wastewater flow
rates for the two phases of the STP construction.

Table 1: Design Flows to STP

 

Development Stage Equivalent STP Design
Persons (EP) | Loading (kL/day)
Stage 1 112 15.6
Stages 2 to 4 371 52.0
Total 483 67.6

 

 

 

 

 

 

 

 

2.2 STP Design and Operation

The STP proposed for installation at the site is a membrane bioreactor with submerged
ultra-filtration membrane (Clearstream SBMBR). The filtration membranes remove
microorganisms and most suspended solids from wastewater to produce a high quality
effluent suitable for use as low grade process water or for irrigation purposes.

Nitrogen removal is achieved through nitrification and denitrification processes.
Phosphorous removal from wastewater is achieved by two processes:

(a) chemical precipitation and removal by solids separation and;
(b) enhanced biological phosphorous removal through uptake by
microorganisms and biosolid removal, processing and disposal or reuse.

 

Petrac Leisure NNS-S Pty Ltd Version 2 17 July 2006
1\7296-08\WP\technical reports\Effiuent Irrigation Management Plan - Stage 1 Version 2.doc Page 2