Page 150 - Towards A Sustainable Future 2024

Eco Solution 2: Reusable Cutlery and The average water usage for 144 cutlery items was 100 litres
Handwashing (Iredale, 2023). Based on this, we calculated the associated
CO2 emissions in Table 4.
After completing the kitchen renovation in early January
2023, Peacehaven resumed in-house meal preparation, By transitioning to a dishwasher for cutlery washing,
discontinuing using biodegradable bowls and bento sets. Peacehaven aimed to mitigate the impact of staff shortages
However, the challenge of a staffing shortage for washing while maintaining high standards of cleanliness and hygiene.
reusable cutlery arose. In response t, the ESI team investigated Water consumption using a dishwasher is shown in Table 5,
the potential carbon footprint associated with water usage, where 13 litres of water are used for cleaning 144 cutlery
detergent consumption, and labour expenses for washing items.
the reusable cutlery. This analysis provided insights into the
financial and environmental implications of transitioning to Table 5: Water usage and the cost of dishwashing
reusable cutlery and handwashing practices at Peacehaven. by dishwasher

Eco Solution 3: Use of Dishwasher for Cutlery 144 items of cutleries 13 litres
Washing 154 cutleries/ meal 13.9 litres

Water used for 3 meals/day 41.7litres
Recognising the challenge posed by a staffing shortage for
handwashing cutlery, Peacehaven exploredthe possibility Water used per year 15,220.5 litres (A)
utilising a dishwasher as an alternative solution. This
approach would address the staffing shortage and streamline Cost of water per year $41.70 (B)
the cutlery washing process, potentially improving efficiency Carbon emission by water 22.83kgCO2
and reducing labour costs. To facilitate dishwasher use, (15.22 m3)
Peacehaven sought a contractor to provide the necessary
staff to operate and maintain the equipment. The estimated
staffing cost for this service amounted to $1,800 per month, Compared to the carbon emission by water using
totalling $21,600 per year.
handwashing and dishwashers, there were projected savings
Table 4: Water usage and the cost of washing by hand. of (35.12-22.83) = 12.29kg/CO2 per year.

144 items /cutleries 100 litres Total number of cutlery items that needed to be washed
154 cutleries/ meal 107 litres after each meal was 154. When using the dishwasher, it took
3 minutes to clean a tray, whereas 8 trays were required for
Water used for 3 meals/day 321 litres each wash. The calculations for the time needed over 1 year
Water used per year 117,165 litres of dishwasher use are shown in Table 6.
Carbon emissions caused by 35.15 kgCO2
water
Cost of water per year $321

Note: Water costs $0.00274 per litre, according to PUB.
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