Attachment 6 - Odour Impact Assessment - Katestone · 132005.638.06

1. INTRODUCTION

Katestone Environmental Australia Pty Ltd (Katestone) has been commissioned by Noosa Council to conduct an
odour assessment of a proposed in-vessel composting activity to be located at the existing Noosa Resource
Recovery Centre at 561 Eumundi–Noosa Road, Doonan (Figure 1).

The Noosa Resource Recovery Centre includes an existing landfill operation and a green waste mulching
operation. Approximately 17,000 tonnes per year of green waste is currently accepted at the facility, being shredded
and stockpiled prior to export as mulch. The proposed development will see this green waste composted instead,
and the capacity increased such that up to 25,000 tonnes per year of green waste can be processed by aerated
in-vessel composting (with extraction of air to biofilter) as the basis of design, with the potential to increase capacity
to 30,000 tonnes per year in the future within the built infrastructure.

Up to 2,000 tonnes per year of food waste with an odour risk rating of Low or Medium (such as coffee grounds)
may also be added to the process, but High or Very High risk food wastes will not be accepted (ratings according
to the Queensland Government’s Best Practice Environmental Management Guideline ERA 53(a)—Organic
material processing by composting).

The proposed composting operations align with Noosa Council’s From Waste to Resource: Draft Waste Plan 2023
– 2028, and the community endorsed goal of 100% diversion of organic waste from landfill by 2030 (Orez, 2026).

This report consists of the following sections:

    •    Detailed description of the existing and proposed odour-generating operations (Section 2)
    •    Legislative framework (Section 3)
    •    Assessment methodology (Section 4)
    •    Existing environment (Section 5)
    •    Emissions to the atmosphere (Section 6)
    •    Results (Section 7)
    •    Conclusions (Section 8)




 Katestone Environmental Australia Pty Ltd                                                          17 September 2026
 D25072-8 Noosa Council - Noosa Composting Odour Assessment - Final                                           Page 1