What is the difference between acid and alkali dairy detergents?

What's the job of a detergent?

When it comes to dairy hygiene, chemicals aren't magic potions, they're tools. And like any tools, you've got to know what they're built for if you want to use them properly.

There are two main types of dairy detergents:

• Alkali detergents

• Acid detergents

Both do very different jobs, and you'll need both if you're serious about maximising your milk quality.

What does an alkali wash do, and how often do you need one?

The tough guys for fat and protein muck.

• At least 3x alkali washes a week, hot only

• Contain caustic (melts fats) and chlorine (breaks down protein)

• Caustic and chlorine also act as sanitisers killing bacteria

• Recirculate to get the job done

• Needs a follow-up acid wash to neutralise residue

Pro tip: Alkali detergents leave a powdery film if you skip the acid wash. That residue can mess with your milk and damage your gear over time.

What does an acid wash do, and when do you use it?

Your go-to for hard water stains and mineral grime.

• Use daily, hot or cold, morning and night

• Often doubles as sanitisers

• Targets mineral soil like iron, manganese, calcium and silica

• Leave surfaces shiny and helps prevent milkstone build-up

• Won't do much against milk fat or protein

Why do you need both acid and alkali?

• Acid cleans the inorganic stuff (think: water minerals)

• Alkali targets the organic stuff (milk fats & proteins)

One without the other? You're only doing half the job.

Is hot water enough on its own?

How much of a good clean is actually the chemical?

Cleaning products are just one piece of the hygiene puzzle and they only account for about 20% of your overall cleaning performance. The rest?

• Mechanical action (40%)

• Contact time (25%)

• Temperature (15%)

We'll get into those in the next sections. But for now, remember:

The smartest farmers clean for performance, not just appearance.