Industrial Tuna Cooking: Recommended Methods and Machinery

Tuna cooking is one of the most critical stages within an industrial canning line. Key factors such as raw material yield, final loin quality, energy consumption, weight loss levels, and overall plant efficiency depend on this process.

In practice, there is no single solution that fits every case. Choosing between different tuna cooking methods depends on production volume, fish size, the desired level of automation, and the expected return on investment.

In this context, Gaictech develops solutions adapted to various production requirements within its tuna lines, designed to guarantee quality, food safety, traceability, and process stability. Our ability to design complete, customized solutions is one of our hallmarks, positioning us as a leader and technological partner in the global canning industry.

Tuna Cooking: a Key Process in the Canning Industry

Not all canning factories process the same type of tuna or work towards the same objectives. Some plants focus on high volumes and/or large pieces, while others prioritize smaller production runs or simpler processing lines.

In this scenario, cooking machinery must meet a very specific need: cooking evenly, stopping the process at the exact moment, and preparing the fish for the cleaning phase without compromising yield.

Poorly managed cooking can lead to:

• Overcooking and unnecessary water loss
• Oxidation of the meat
• Increased waste during the cleaning stage
• Higher energy consumption
• Reduced product control prior to packing

Therefore, discussing tuna cooking machinery also means discussing productivity, process control, and profitability. Based on these needs, several systems are available.

Vacuum Tuna Cookers: The Solution for Large-Scale Production

Static vacuum tuna cookers represent the most advanced technology in tuna cooking. They are particularly suitable for high production volumes and larger fish (exceeding 10 kg), where the fish must be cut to fit inside the cooker.

How a vacuum cooker works

Tuna Cooking Tanks: the Traditional Water or Brine System

Water-based tuna cooking tanks are the most classic method. In this system, the fish is submerged in tanks of water or brine at approximately 98 °C.

This solution is typically used for lower production volumes or with smaller species, especially when the initial investment is a decisive factor. From an operational standpoint, it is a well-known and conceptually simple system, though it has certain limitations regarding process control.

Nevertheless, when cooking with water and salt, a product with a distinct flavor profile can be achieved, which is highly valued for gourmet or high-value-added presentations.

On the other hand, logistics are more complex. These tanks require the use of hoists to load and unload the cages, generate a significant amount of wastewater that must be treated, and demand higher steam consumption, as water is a poor conductor of heat.

Square Steam Cookers: an Intermediate Solution by Gaictech

Within this range of options, Gaictech has developed an intermediate solution: adapting the design of square cookers for tuna processing.

This system sits between the traditional cooking tank and the large vacuum cooker. Its main advantage is that it offers a very attractive balance between cost, ease of control, and floor space utilization.

Due to their square geometry, these units allow for better optimization of the factory layout. Furthermore, they are more economical than vacuum systems and easier to operate than traditional tanks, making them a highly competitive alternative for plants looking to improve their process without committing to a high-end investment.

Recovery of Cooking Exudates: a Business Opportunity

One of the most interesting differentiators of Gaictech’s vacuum cookers is the ability to recover oils and fats exuded during the cooking process.

Using automatic valves, our equipment separates the liquids rich in proteins and Omega-3 generated during this phase from the cooling water. This allows for the utilization of these by-products, which can be supplied to industries such as fishmeal or cosmetics.

The benefit is twofold: first, it generates an additional revenue stream; second, it reduces the organic load of the plant’s effluents, leading to savings in wastewater treatment costs.

Which System to Choose for Tuna Cooking?

There is no single valid criterion for all plants. The choice must be based on a realistic technical and production assessment.

• For large volumes and large tuna, the vacuum cooker offers the highest level of control, quality, and yield.
• For smaller production runs or high-value-added presentations, the cooking tank remains a functional solution, albeit with more logistical and energy limitations.
• For intermediate investments, square cookers represent a very competitive alternative due to their cost, operational simplicity, and space optimization.

Gaictech: your Technological Partner in Tuna Processin

In industrial tuna processing, cooking is directly linked to raw material quality, subsequent cleaning, loin yield, energy management, and the overall profitability of the factory.

That is why at Gaictech, we design solutions adapted to each production reality, based on process knowledge, applied engineering, and a comprehensive plant vision. Our goal is not just to manufacture machinery, but to help each client choose the cooking system that best meets their operational and economic needs.