The Primodan GDL Mixing Unit

running inline with the filling machine

When producing white cheese fermented not by culture but by the acidifying agent known as GDL (Glucono – Delta – Lactone) powder - it is necessary to mix the powder into the cheese milk prior to filling the product.

Primodan has extensive experience in producing GDL mixers for this application, which run inline with the filling machine regardless of whether it is a Tetra Pak carton/brick machine, a SIG combibloc machine or a Primodan cup or canister filling plant.

In our system, we are able to not only mix in GDL powder but also to mix in salt in the same unit, thereby removing the need for pre-salting tanks.The units are produced as semi-automatic or fully automatic depending on the customer´s preference.

Both types are fully CIP cleanable from the customers CIP plant. As an additional feature Primodan offers in-line flavor mixing units, which can be connected to the GDL mixer for mixing in flavor inline before the filling machine.



Best product features


Superior mixing properties

When mixing GDL powder or salt in this unit the design ensures good mixing.

Compact foot-print

Since the design of this unit is made with the mixing tank on top of the buffer tank the footprint is limited.


Hygienic design

The mixing unit is produced in a hygienic design and is naturally CIP cleanable from the clients CIP plant.

Proven technology

Primodan has supplied a vast number of these mixing units to be connected to filling lines from SIG combibloc, Tetra Pak and naturally Primodan filling lines.


Specifications and options


Capacity-range: 1,000-5,000 kg/hour
Feedlines: The unit can supply up to 3 filling lines with individual rennet dosing lines
Pneumatic requirement: minimum 6 bar
Electrical consumption: App. 4 kW
Materials: Stainless steel
CE certificate / EU norm


Mixing tank, with agitator and manhole
Buffer tank
Feedpump for cheesemilk
CIP return pump
Feedpump for rennet including flowmeter control
Mixing prepation tank for rennet
Buffer tank for rennet
Full CIP cleanable unit from central CIP 


Automatic auger feeders for GDL and SALT
Heat-treatment of SALT and GDL powder in auger feeders
CIP cleaning of augers
Sterile overpressure in mixing tank
Inline flavor dosing and mixing equipment on the way to the filler
Inline rennet dosing and mixing
Filling guns to be installed on the feedline for filling by personal




Talk to us

We are very keen to hear from you and discuss your project. Please give us a call or send an e-mail, and we are at your service.

Lars Henriksen

Sales Director
Dairy & white cheese plants

Europe and Middle East

+45 59 43 14 79

Jørgen Henriksen

Regional Sales Director
Dairy project engineer


+45 20 46 95 32

John Persson

Regional Sales Director
Filling and packaging machinery

Baltics, Finland, Sweden,
Central & Eastern Europe,
Russia and Middle East.

+46 70 884 21 07

Adam Soerensen

Sales Manager
Yellow Cheese


+45 20 19 52 23




Customer testimonials

Primodan was very good at analyzing what we wanted, and converting these needs into a tailor made filling-line

Peter Madsen
Operation Manager at Naturmælk

The business processes with Primodan has been very satisfactory. When dealing with Primodan you are always treated with special attention.

John Leahy
Business Development Director at Irish Dairy Board

For more than 20 years we have had Primodan as supplier of filling machines — they are very professional, and listen to our needs and transfer them into good technical solutions.

Zameer Haneef
Site Manager Fonterra - Saudi New Zealand Milk Products CO