5 Extra Minutes in Every CIP: How We Cut Rinse Water by 40% Without New Equipment

Case study at a glance

1. Customer: One of our dairy customers

2. Challenge: A dairy CIP cycle running longer and using more water than expected

3. Solution: A staged intermediate rinse with conductivity control, plus operator training

4. Result: 40% less rinse water after caustic and 7–9 minutes saved in every CIP, with no new equipment
   

   

Is your CIP running five minutes longer than it should? Most plants do not notice. The cycle completes, the report says "done", and production moves on. But those extra minutes add up quietly, every single day. This case study shows how one dairy plant achieved real CIP water savings through smarter logic, not new hardware.

The simple math most plants miss  

Take a plant running 10 CIPs a day:

Extra time per CIP	CIPs per day	Production days	Time lost per year
5 minutes	10	300	250 hours

In this example, a rinse flow of 15 m³/hr means those same minutes send about 3,750 m³ of water down the drain every year. Every extra minute also uses hot water and steam, pump power, chemicals, operator time and effluent treatment capacity. These are small items on their own, but together they matter in production, and they make CIP water saving one of the most practical places to start.

The case: a dairy CIP that took too long  

At one of our dairy customers, the CIP cycle took longer than expected and used more water than it should. When we studied the step-by-step data, the delay sat in one place: clearing caustic after the caustic circulation step.

The existing logic pushed water continuously through the objects and lines after caustic circulation. The rinse continued until the return conductivity fell below the final set point of 5 mS/cm. Only then did the hot water step start.

The problem with a continuous push is that fresh water keeps mixing with the caustic already in the line. The caustic is diluted slowly instead of being removed, so the step runs long and uses a lot of water. In a dairy CIP, that one step can quietly stretch the whole CIP cycle time.

What we changed: a staged intermediate rinse  

Instead of one long continuous flush, we split the intermediate rinse into three short stages. Each stage flushes to a set point, then empties the line before the next stage begins.

1. Intermediate rinse 1: flush until return conductivity falls to 30 mS/cm, then stop the supply pump. Keep the return pump running until the flow switch goes off or the timer ends to empty the line.

2. Intermediate rinse 2: flush until return conductivity falls to 15 mS/cm, then empty the line the same way.

3. Intermediate rinse 3: flush until return conductivity falls to 5 mS/cm, empty the line, and start the hot water step.

Why it works: every stage starts with an empty line. Each fill of fresh water carries out a large share of the remaining caustic in one go, instead of slowly diluting it. The same result is reached with far less water and in less time. Conductivity control determines when each stage ends, so the sequence follows the line's actual condition instead of a fixed timer.

The results  

Result	Value
Rinse water after caustic	40% less than before
CIP cycle time	7–9 minutes saved in every CIP
New equipment	None
Cleaning validation	Same final conductivity set point (5 mS/cm) maintained

For a plant running 10 CIPs a day, saving 7–9 minutes per CIP gives back 70–90 minutes every day, or about 350–450 hours a year over 300 production days. Results at other plants depend on their own process, equipment and data, which is why every CIP needs its own review. That CIP water saving came entirely from changes to the logic and to how the team works, and the shorter CIP cycle time also frees the line sooner for production.

What it took  

Nothing new was installed, which is what makes this kind of CIP optimisation easy to adopt. We used the existing return conductivity transmitter, flow switch, and pumps. The change was:

1. PLC program changes: staged rinse logic, conductivity control set points per stage, and line-emptying control using the flow switch with a timer backup.

2. Operator training: so the team understands why the sequence changed and what to watch on the HMI.

A small logic change led to big savings for the customer. That kind of result makes Goose a valued long-term partner, not just an equipment supplier.

Make every CIP visible with GOOSE CIPOPTIMA™  

Most CIP delays are not visible until someone digs into the data. GOOSE CIPOPTIMA™ makes them visible every cycle.

1. Actual vs ideal: every object and circuit is compared with its ideal water, chemical, energy and time consumption.

2. Process validation: temperature, conductivity, flow and time are checked at each step, pass or fail.

3. Reason for delay: when a step takes longer and costs more, the reason appears on the operator HMI.

4. Production and QC view: production heads and the QC team have the same data to monitor and sign off.

Together, these views support continuous CIP optimisation instead of one-off investigations.

Is your CIP running longer than it should?  

Connect your CIP to GOOSE CIPOPTIMA™ and find out. Our team can review your CIP step times and consumption as a first step in CIP optimisation, and show you where the minutes and litres are going.

Talk to us about your CIP and see what GOOSE CIPOPTIMA™ can show you.

Goose Industrial Solutions is a Siemens Authorised System Integrator specialising in dairy and food processing automation, with 25 automated CIP systems supplied and 100+ CIP systems upgraded from manual to automatic.