On-site nitrogen generators give food and beverage operations a dependable source of nitrogen for packaging, processing, and modified atmosphere applications. Producing nitrogen at the facility can help maintain product quality, support longer shelf life, reduce dependence on deliveries, and provide greater control over operating costs.
Nitrogen is widely used to displace oxygen, protect sensitive products, reduce oxidation, and create the controlled atmosphere required for many food packaging processes. The appropriate nitrogen system depends on the product, packaging equipment, required purity, flow rate, pressure, and production schedule.
A nitrogen generator separates nitrogen from compressed air and supplies it to packaging or production equipment as needed.
For food and beverage operations, on-site nitrogen generation can help:
Nitrogen gas makes up approximately 78% of the atmosphere. It is colorless, odorless, and relatively inert, which makes it useful for controlling oxygen exposure in food packaging and processing applications.
When oxygen remains inside a package, it can contribute to oxidation, flavor changes, color loss, texture changes, and reduced product quality. Nitrogen can be introduced into the package to displace some or most of that oxygen, depending on the product and packaging process.
Nitrogen does not preserve every product in the same way. Gas composition, residual oxygen level, package material, seal integrity, storage temperature, and product characteristics must all be considered.
Modified atmosphere packaging, commonly called MAP, changes the composition of gases surrounding a food product inside its package. Nitrogen may be used by itself or as part of a gas mixture selected for the specific product.
In many applications, nitrogen is used to:
The correct gas mixture and residual oxygen target should be established based on the food product, packaging method, applicable standards, and process requirements.
Nitrogen is commonly used in bags of chips, pretzels, nuts, and other snack foods. It helps limit oxygen exposure while creating a gas cushion that can reduce crushing during handling and transportation.
Ground and whole-bean coffee can lose aroma and flavor when exposed to oxygen. Nitrogen flushing helps reduce oxygen inside the package before sealing.
Controlled gas composition can help maintain the appearance, texture, and freshness of certain fruits, vegetables, salads, and leafy greens.
Nitrogen may be used as part of a modified atmosphere gas mixture for meat and poultry packaging. The complete gas composition depends on the product, desired appearance, storage requirements, and packaging process.
Nitrogen can help protect products containing oils, fats, seasonings, or other ingredients that may degrade when exposed to oxygen.
Nitrogen may be used to purge containers, displace oxygen in headspace, protect product quality, and support certain packaging requirements.
Nitrogen also supports several production processes beyond final packaging.
Learn how on-site nitrogen generation can support beer and wine production, including blanketing, packaging quality, supply reliability, and cost control.
An on-site nitrogen generator uses compressed air as its feed source and separates nitrogen from the other gases in the air.
A complete system may include:
The generator must be sized to deliver the required nitrogen purity, flow rate, pressure, and duty cycle. Storage may also be used to support short periods of high demand.
Required nitrogen purity depends on the product and process. Higher purity is not automatically better for every application. Producing nitrogen beyond the actual process requirement can increase compressed-air and energy demand.
When defining the purity requirement, consider:
The nitrogen system should be selected around the required packaging result, not simply the highest available purity rating.
Reducing oxygen exposure can help protect taste, aroma, color, texture, and other product characteristics that affect customer acceptance.
Modified atmosphere packaging can slow certain forms of product degradation when it is correctly designed for the food, package, storage conditions, and distribution process.
An on-site generator produces nitrogen from compressed air, reducing dependence on scheduled deliveries and stored liquid or cylinder inventory.
Bulk and cylinder nitrogen costs can include gas, delivery, storage, rental, fuel surcharges, and administrative expenses. On-site generation shifts the primary operating cost toward electricity, compressed-air production, and routine maintenance.
The financial benefit depends on:
A properly designed system can be sized for current consumption and evaluated for future production growth, additional packaging lines, or changing demand.
Generating nitrogen at the facility reduces exposure to delivery scheduling, transportation disruptions, tank replenishment, and changing supplier fees.
Controls and monitoring can provide better visibility into purity, pressure, flow, operating hours, and system condition.
| Consideration | On-Site Generation | Bulk Delivery |
|---|---|---|
| Supply source | Produced at the facility from compressed air. | Delivered and stored at the facility. |
| Ongoing costs | Electricity, compressed air, filters, and maintenance. | Gas, delivery, rental, storage, surcharges, and contract-related expenses. |
| Purity | Configured for the process requirement. | Supplied at the delivered specification. |
| Availability | Available while the generator, compressed-air system, and utilities are operating. | Depends on stored inventory and timely replenishment. |
| Space and infrastructure | Requires generator, air treatment, storage, and service access. | Requires storage equipment, delivery access, and associated safety provisions. |
Compare bulk nitrogen delivery with on-site nitrogen generation to evaluate supply models, operating costs, purity requirements, and compressed-air demand.
The cost comparison between on-site generation and delivered nitrogen should be based on the facility’s actual consumption and operating conditions.
Evaluate:
A nitrogen audit or lifecycle-cost comparison can help determine whether on-site generation is financially appropriate and estimate a realistic payback period.
See how an on-site nitrogen system supported cost savings and productivity in a real MCE customer application.
A food packaging nitrogen system should be designed around the complete application.
On-site nitrogen generation may support:
MCE supports food and beverage operations with nitrogen-generation system selection, integration, service, and ongoing technical support.
Our capabilities include:
On-site nitrogen generation can give food and beverage operations greater control over gas purity, availability, operating costs, and packaging performance.
The right system begins with a clear understanding of the product, packaging process, nitrogen requirement, production schedule, compressed-air system, and long-term operating goals.
Explore MCE nitrogen generator capabilities or contact MCE to review your current nitrogen supply, food packaging application, purity requirements, and opportunities to improve cost control and supply reliability.