Food waste is often treated as something to manage after service. At Sydney’s Opera Bar, measuring what entered the bin turned it into useful operational data.
Managed by hospitality group Solotel, the high-volume Circular Quay venue introduced an AI-powered weighing system with support from a NSW EPA Bin Trim Equipment Rebate grant. The aim was to identify what food was being discarded, how much it cost and where changes could be made.
According to End Food Waste Australia, the venue reduced its food waste from 69g to 46g per cover during the first month, a fall of 33%. Kitchen-generated waste also reportedly dropped from 32% to 10% of the venue’s total waste stream.
The results show that the bin can reveal far more than a venue’s sustainability performance. It can point to problems in purchasing, preparation, menu design, portioning and communication between the kitchen and front of house.
Making waste visible
Opera Bar’s kitchen team knew food was being wasted, but the scale and cost were difficult to understand without consistent measurement.
The tracking system allowed waste to be weighed and recorded as it was discarded. This helped the team identify frequently wasted ingredients and connect discarded food with its financial value.
That visibility also changed staff behaviour. End Food Waste Australia reports that trimmings previously thrown away began to be saved, frozen and processed once there was enough to use efficiently.
The data influenced how ingredients were prepared and used across the menu. Tuna trimmings left over from sashimi preparation, for example, were repurposed in a confit dish rather than discarded.
For smaller venues, the technology may look different. A set of scales, a spreadsheet and clearly labelled waste containers can still provide enough information to identify patterns.
The important part is recording why food was discarded, not simply how much ended up in the bin.
From waste data to tighter controls
Once a venue can see where waste occurs, the figures can be used to review everyday operating decisions.
Repeated spoilage may indicate that order quantities or delivery frequency need adjusting. Large volumes of prep waste could point to inconsistent knife skills, unsuitable product specifications or ingredients that are not being fully used across the menu.
Food regularly left on customers’ plates may raise different questions. Portions could be too large, side dishes may not be valued or menu descriptions may be setting the wrong expectations.
At Opera Bar, customer leftovers remained a more difficult area to address. The venue identified commonly unfinished items, including sides such as fries, and recognised the importance of front-of-house feedback in understanding what customers were leaving behind.
This is where waste measurement becomes a service-control tool. When kitchen and floor teams share what they are seeing, venues can adjust portions, garnishes, side dishes and ordering decisions using evidence rather than guesswork.
NSW requirements are now in effect
The operational argument for measurement has become more timely in NSW.
Since 1 July 2026, the first stage of the state’s commercial food-organics requirements has applied to the largest eligible supermarkets, institutions and hospitality businesses. This includes relevant premises with weekly general waste capacity equal to at least six 660-litre bins or 16 240-litre bins.
Businesses captured by the requirements must provide sufficient food-organics bins, keep food waste separate from general waste and arrange for it to be collected separately at least once a week. Smaller generators will progressively enter the system in 2028 and 2030. Operators can check the current thresholds, exemptions and requirements through the NSW EPA.
Separating food waste may address compliance, but measuring it can help prevent that waste from being created in the first place.
A first 30-day food-waste audit
Operators do not need to overhaul the entire kitchen at once. Start with one month of consistent tracking.
- Days 1–7: Establish the baseline. Weigh food waste each day and record the number of covers. Separate preparation waste, spoilage, overproduction and customer leftovers.
- Days 8–14: Find the repeat offenders. Identify the ingredients and menu items appearing most often. Add an estimated purchase cost to show the financial impact.
- Days 15–21: Test small changes. Adjust one or two order quantities, prep methods, batch sizes or portions. Look for opportunities to use suitable trimmings elsewhere on the menu.
- Days 22–28: Bring in the whole team. Ask chefs, kitchen hands and front-of-house staff what they are noticing. Customer feedback can explain waste that numbers alone cannot.
- Days 29–30: Review and reset. Compare grams of waste per cover with the first week. Keep the changes that worked, set a new target and continue tracking the highest-cost waste categories.
Opera Bar’s experience suggests that food-waste measurement does not need to sit separately from commercial performance. Used properly, the bin becomes another operating report, showing where food, labour and margin may be slipping away.
