HOPSTAR™ Iso Hop Technology

Efficient treatment methods

For higher alpha acid yields in combination with significantly reduced energy expenditure for wort boiling. GEA has developed an innovative method for the efficient use of hop extract. For an industrial application of this method they also integrated a homogenizer well known and proven e.g. in the field of milk treatment.

Innovative hop technology

The process equipment HOPSTAR™ Iso is primarily designed for the use of hop extract, but with a slight modification of the process, a mixture of hop pellets and hop extract can also be processed. For the method as well as for the equipment a patent application was filed.

The basic technical principles for higher alpha acid yields are the droplet size reduction in the hop extract suspension and the isomerization of the suspension under controlled process conditions parallel to the usual wort boiling. The dosing of the isomerized hop extract suspension can be done towards the end of wort boiling in the kettle or independently of this provision directly before the wort cooler into the hot wort.

Impressive results

Results of large-scale trials with a reduction of alpha acid dosing by 30 % showed a sensorially more intense, but more harmonious bitterness in the beer than in the beer batch that was produced in the standard way with dosing of the total hop extract into the wort kettle.

The analytical results of the bitterness units showed a comparable level in both beers. The indicator substance for the hop oil content, linalool, is significantly higher by a factor of 3 – 5 in beers with dosing of isomerized hop extract suspension than in the normally hopped beer.

If it is possible to brew beer outside the provisions of the Provisional Beer Law, the yield of isomerized alpha acids can be increased even further by the process-related adjustment of the pH-value in the hop extract suspension according to the Drinking Water Ordinance.

The described technology supports customers in the brewing industry to achieve the objectives defined by politics regarding the implementation of energy-efficient processes for beer production and contributes to the reduction of CO2 emissions.

Efficient processing for higher yields – Conclusion

The investment in the HOPSTAR™ Iso equipment for homogenization and isomerization of hop extract suspension is characterized by the efficient and sustainable use of hops, especially the alpha acids. With a possible reduction of hop dosing by 30 %, every brewer can easily determine how far his annual purchasing costs for hops will be reduced.

In addition, with regard to the energy expenditure during wort boiling, savings of up to 50 % of the originally required heat are possible.

With the use of this technology, the demands for the application of energy-efficient and sustainable production processes to achieve the objectives of environmental policy in the EU are met.


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Dear partners,

We would like to inform you that in the framework of preventive measures aimed at effectively addressing the spread of “Covid19” disease and in accordance with the National Public Health Organization guidelines (https://eody.gov.gr/), our company is committed to ensure public health, safety of its partners and employees. Therefore we have recommended the fulfillment of our employees' tasks through teleworking.

The duration of this measure is initially set from 17.03.2020 to 30.04.2020

The design provides full operation, but due to special conditions, delays in specific tasks or communication may occur.

Our company will strive to keep its operation uninterrupted and secure by serving its clientele in ways and timeframes that are judged possible.

We thank you for understanding and we remain at your disposal.

Αγαπητοί Συνεργάτες,

Θα θέλαμε να σας ενημερώσουμε ότι στο πλαίσιο μέτρων πρόληψης με σκοπό την αποτελεσματική αντιμετώπιση εξάπλωσης του κορωνοιού και σύμφωνα με τις οδηγίες υγιεινής & ασφάλειας που έχει ορίσει ο ΕΟΔΥ (https://eody.gov.gr/), η εταιρία μας για να διασφαλίσει τη δημόσια υγεία, την ασφάλεια των συνεργατών και των εργαζομένων της, συστήσαμε την εκπλήρωση των καθηκόντων των εργαζομένων μας, μέσω τηλεργασίας.

Η διάρκεια του συγκεκριμένου μέτρου ορίζεται αρχικά από τις 17.03.2020 έως τις 30.04.2020

Ο σχεδιασμός προβλέπει πλήρη λειτουργία, ωστόσο εξαιτίας των ειδικών συνθηκών, ενδέχεται να παρουσιαστούν καθυστερήσεις σε συγκεκριμένες εργασίες ή και στην επικοινωνία.

Η εταιρία μας θα προσπαθήσει να διατηρήσει αδιάληπτη και ασφαλή την λειτουργία της, εξυπηρετώντας το πελατολόγιο της με τρόπους και σε χρονικά πλαίσια που κρίνονται δυνατά.

Σας ευχαριστούμε για την κατανόηση και παραμένουμε στην διάθεση σας.