ROI & Savings — Food Processing

A generator is a capital purchase that replaces a recurring cost. Whether it pays back in a food plant, and how fast, comes down to what you spend today on the chemistry it can replace, and how much of that spend actually moves. This page builds the case the way a plant finance team will want to see it.

What to count today

Pull twelve months of invoices, then add the costs that never appear on a chemical invoice.

What to count with a generator

• One-off: the system, installation, feed-water treatment (softener and filters), holding tank, pumps, distribution and outlets, plus commissioning and training.
• Ongoing: food-grade salt or ready-mixed brine, water, electricity, replacement filters, service parts, and test strips or photometer reagents.

The model

Three numbers: A, the annual cost today that the generator replaces; B, the annual running cost with the generator; C, the one-off cost. Annual saving is A − B, payback is C ÷ (A − B), and five-year net is 5 × (A − B) − C. If A is not comfortably larger than B, a generator is not the answer for that plant, and we will say so.

A worked example

Hypothetical figures for a mid-size single-site plant running two production shifts and one sanitation shift, to show the method. Your audit uses your invoices and utility rates.

How sensitive is it?

Holding the one-off at $42,000 and running costs at $8,000 a year:

The pattern is consistent: below roughly $20,000 a year of replaceable spend, a full system is hard to justify on chemicals alone and a ready-to-use product or a smaller unit is usually better. Above it, the question becomes how to size and install rather than whether.

The savings plants underestimate

• Floor space. Chemical stores occupy conditioned, food-safe space. Releasing it has a real value on a constrained site.
• Deliveries and handling. Fewer pallets through goods-in, less decanting, no concentrate on the floor during a shift.
• Run-outs. The cost of a sanitation step done badly because the drum was empty rarely appears in any ledger, and it is the one that shows up in an audit.
• Consistency. Solution produced at a set strength removes dilution as a deviation cause.
• Price exposure. Chemical and freight prices rise; salt and electricity are usually steadier.
• Water, where a rinse step legitimately goes away. Only where the applicable rule allows it — check before counting it.

And the costs plants underestimate

• Feed-water treatment, if hardness is high.
• Distribution: getting solution to the point of work is where budgets slip.
• Commissioning, training and the SOP rewrite.
• Keeping a registered product for the tasks that need label claims.
• The time to run a proper pilot with verification before and after.

Building the business case

1. Twelve months of invoices, by product and volume.
2. The task list: area, method, volume per use, frequency.
3. Time-and-motion on receiving, storage and dilution.
4. Utility rates for water and electricity.
5. Install location, water supply, drainage, power, and the route to each point of use.
6. The tasks that must stay on a registered product.
7. Deviation and rework records that touch sanitation.

The free sanitation audit assembles this into a written model, sizes the system, and tells you when a generator is not the right answer. The general method, with a real cruise-fleet example, is on ROI and savings; leasing, which turns the one-off into a monthly payment, is on the leasing page (US businesses).

Two smaller scenarios

Not every plant is a $50,000-a-year sanitiser buyer. Two other shapes come up regularly.

The small processor. One line, one sanitation shift, maybe $12,000 a year of replaceable spend. A full system with distribution rarely pays back quickly here. The sensible options are a smaller unit serving the two or three highest-volume tasks, a ready-to-use registered product for the rest, or leasing to convert the capital cost into a monthly payment that tracks the saving.

The multi-site group. Five plants, each spending $20,000–30,000. Run the model per site: the two highest-spend sites usually justify systems first, and the group benefit comes from standardising SOPs, logs and training across all five — which is often worth more than the chemical saving at the smaller sites. Standardisation also makes customer audits much easier, because every site answers the same questions the same way.

Buying, leasing and cash flow

Where the saving shows up

Finance teams reasonably ask where the money appears. Chemical spend falls on the sanitation or consumables line. Freight and disposal fall with it. Salt, water, electricity and service appear as new, smaller lines. Labour usually does not fall as a headcount; it shows up as time returned to sanitation tasks that were being squeezed. Space is a soft saving until the site needs the room, at which point it is very real. Rework and hold costs are the hardest to attribute and often the largest — track them before and after so the comparison exists.

The risk side of the case

Most business cases for sanitation are written in savings, but the number that persuades a board is usually avoided cost. A single product hold traced to a sanitation deviation, a customer audit finding that triggers a corrective action plan, or a positive environmental result that puts a line out of service for a deep clean — each of those costs more than a year of chemical spend in many plants. Onsite generation does not remove those risks; it removes one of their common causes, which is solution that was not at the strength the SOP assumed. Put a conservative number on how often that has happened in the last two years, and include it as a separate line in the case rather than folding it into the savings.

Frequently asked questions