Appendix 4 - Noise & Odour Assessment

3           Plant description

3.1         Operational overview
The activities and processes to be implemented on-site involve the brewing of the beer, followed by
fermenting, filtering and packaging. Finished goods are stored on-site for distribution. Brewing is primarily
a natural process in which a mash of malted barley is boiled, fermented with yeast and filtered. The final
beer is packaged into bottles or kegs for distribution.
Typical discharges from the process include:

1. wastewater from the various operations including cleaning and sanitising
2. spent brewing raw materials in the form of processed grain, waste yeast and trub (spent hops and
   proteins from the boiling process)
3. carbon dioxide resulting from the fermentation process
4. vapours from the brewing kettle
5. dust from the malt conveying processes
6. waste packaging associated with raw materials
7. other recyclable materials


3.2         Process overview
The key steps in the brewing and packaging processes are:

Malt Handling and Milling
Bulk malt is delivered by road transport and is unloaded into the grain storage.
Minor malt varieties are received in bulk bags and transferred to hoppers. In preparation for each brew,
malt is milled in the enclosed mill room.

Mashing and Lautering
Hot water recovered from the wort cooling heat exchange is added to the milled malt and further heated.
At the end of this process, the clear ‘wort’ is separated from the spent grain and transferred to the brew
kettle.

Wort Boiling and Cooling
Wort is boiled in the brew kettle by steam heating and hops are added. The waste heat contained in the
hot vapour released from this vessel is recovered to preheat subsequent brews during their transfer to
the brew kettle. At the end of the boiling process the wort is cooled through a heat exchanger in which
the counter-flow is chilled’ ice water’ which itself becomes heated and is used as the mashing water for
the next brew.
Odour from the brew kettle will be generated during wort and hop boiling along with small quantities of
steam. The brewery will install a mechanical vapour condenser directly on the brew kettle that will draw
any odours from the brewing process into a condenser where the soluble fractions will be transferred to a
liquid waste and will enter the water treatment system while capturing waste heat for reuse. Details on
the vapour condenser as provided by the applicant have been included as an attachment to this

4130136/41-30136-LET_Raftsea                                                                                 3