杏吧直播

Whey is a by-product of cheese manufacturing and one of the largest sources of food loss and waste in the 杏吧直播n dairy sector, and the country鈥檚 food industry more broadly. It鈥檚 the liquid that remains after milk is curdled and strained during cheese and yoghurt production.

Jack Hetherington, from the 杏吧直播 of Adelaide鈥檚 Centre for Global Food and Resources, says while there are multiple high-value reuse options 鈥� such as protein powders, alcoholic beverages (beer or vodka), kombucha, and cooking stocks 鈥� his reveals the sector has not fully capitalised on this valuable by-product.

鈥淎 key finding from my research is that only a small number of cheese manufacturers, across all production scales, have adopted innovative technologies and business models to upcycle whey into high-value products,鈥� Hetherington says.

鈥淭he broader sector has been slow to adopt these practices due to a lack of clear incentives, persistent and unique barriers, and an absence of enabling conditions. Despite this, there is significant potential for widespread change in a relatively short period, particularly if collaborative efforts receive greater support.鈥�

The dairy sector significantly contributes to 杏吧直播鈥檚 overall food loss and waste, accounting for an estimated 14.9 per cent. According to Dairy 杏吧直播, approximately half of this dairy waste is whey.

As part of a mixed-methods study, funded by the 杏吧直播 of Adelaide, the End Food Waste Cooperative Research Centre and 杏吧直播鈥檚 national science agency CSIRO, Hetherington interviewed large and small cheese manufacturers across 杏吧直播 to understand where their whey goes and what factors influence their decisions to repurpose it.

Hetherington explored four potential business models and collaboration strategies to reduce whey waste: in-house processing; third-party partnerships, where whey is sold or given to another business for processing; joint ventures, where manufacturers collaborate to achieve scale and share processing infrastructure; and focal companies, where existing whey processors accept whey from other cheesemakers, increasing throughput and reducing waste.

鈥淎ll four models ultimately achieve the same goal: transforming whey waste into a valuable food product,鈥� Hetherington says.

鈥淢anufacturers already processing whey should consider accepting whey from nearby cheesemakers, which would demonstrate industry leadership, reduce waste, and generate additional revenue. One business I spoke to makes more money from whey than cheese 鈥� there鈥檚 great potential for success.

鈥淔or retail businesses, such as supermarkets, shifting procurement policies towards whey-based alternatives would also incentivise change, while consumers should consider opting for whey-based products.鈥�

Regulatory hurdles could be streamlined to make it easier for cheesemakers and other sectors to seize these opportunities.

鈥淲hile regulations like waste levies incentivise change, other policies 鈥� such as food safety regulations and alcohol taxation 鈥� can act as barriers,鈥� Hetherington says.

鈥淔inding ways to improve the circularity of our food system could unlock economic benefits for the industry and enable us to produce more with less. This will require both new forms of collaboration and the right incentives to help businesses overcome barriers and invest in change. Dealing with food loss and waste is a complex, ever-evolving issue, with no single solution.鈥�