Sustainability meets efficiency

How modern kitchen technology and water management are revolutionizing the catering and hotel industry
© Rational
© Rational
Alexandra Gorsche © Conny Leitgeb Photography
21. May 2025 | 
Alexandra Gorsche
21. May 2025
|
Alexandra Gorsche

Intelligent cooking systems, resource-saving water technologies and well thought-out processes: new studies and practical examples show how digitalization and sustainability go hand in hand in professional kitchens. What the industry can learn from this – and why investing in smart systems is worthwhile.

Intelligent kitchens as a game changer: increasing efficiency in commercial kitchens

The results of the practical study “Increasing the efficiency of commercial kitchens”, carried out by Weihenstephan-Triesdorf University of Applied Sciences together with Rational, speak for themselves: modern kitchen technology not only saves water and energy, but also improves the quality of the food and the working conditions for staff.

The study focused on the kitchen conversion of AXA Konzern AG in Cologne. The use of intelligent cooking systems such as the iVario Pro and iCombi Pro as well as the ConnectedCooking digital management system made it possible to achieve remarkable savings.

“For example, water consumption was reduced by 47.9%”, emphasizes study director Prof. Dr. Michael Greiner. The energy saving of 24.1% was also significant, despite the additional blast chiller. A key result: it's not the connected load that counts, but efficient operation - power peaks were reduced by 20.5%, which lowers energy costs in the long term.

More than just technology: ergonomics, quality and job satisfaction

In addition to ecological and economic factors, the perspective of the employees was also taken into account. Height-adjustable cooking systems and an optimized production model (e.g. cook & chill process) ensure ergonomic working and relieve the team through better planning. Food quality increases - not least because food no longer has to be kept warm for hours. “Modern technology makes everyday work easier and makes kitchen jobs more attractive - a real advantage in view of the shortage of skilled workers”, says Greiner.

Saving water without sacrificing comfort: the example of IHG voco Brussels City North

The hotel sector also shows how innovation and sustainability can go hand in hand. The voco Brussels City North Hotel relies on water-saving faucets from hansgrohe combined with the intelligent gray water recycling system from Hydraloop. With success: around 1.2 million liters of water are saved there every year.

The EcoSmart technology ensures that mixers and showers significantly reduce water consumption - while maintaining the same level of comfort. At the same time, the shower waste water is treated using Hydraloop technology and reused for toilet flushing.

“By combining water-saving technology with a well thought-out recycling concept, we can unite sustainability and design,” explains Hotel Manager Steven Vandevelde. An approach that has been rewarded with the Green Key certificate for sustainability - and can serve as a role model for the industry.

Our conclusion for the future

Whether in commercial kitchens or hotel bathrooms - the way to greater sustainability is through intelligent technologies and well thought-out processes. The examples show impressively that investing in smart kitchen appliances, water recycling and energy-efficient systems not only pays off ecologically, but also economically. For the industry, this means that those who modernize now not only strengthen their future viability, but also their attractiveness as an employer and guest satisfaction.

A la table, s'il vous plaît! A la table, s'il vous plaît! A la table, s'il vous plaît! A la table, s'il vous plaît!
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© Rational

Book tip: The Chemistry of Baking

Knowledge that provides reassurance

Baking is all about precision – and this is precisely where The Chemistry of Baking comes in. Nicola Lamb explains not only how to make something work, but above all why. Sound scientific knowledge meets the practical realities of baking, presented in an accessible way and free from kitchen myths. From flour, sugar, eggs and fat right through to common mistakes with ganache, sponge cake or custard: this book provides confidence through understanding.

Over 100 recipes, organised by time required, put theory into practice – from quick projects to ambitious classics. A book that takes away the fear of failure and makes baking understandable as a craft that can be learnt. Essential reading for anyone who wants to know exactly what really happens in the oven.

INFO
The Chemistry of Baking
Author: Nicola Lamb
Publisher: Edition Michael Fischer / EMF Verlag
Length: 352 pages
ISBN: 978-3-7459-2936-2
Price: €35.00 (DE), €36.00 (AT)
Publication date: September 2025

Book tip: A Guest in Rome

Discovering the flavours of the city

The best way to discover Rome is through its food. A Guest in Rome is less a traditional cookbook than a culinary stroll through the city – guided by Stefan Maiwald and brought to life visually by Andrea Di Lorenzo. Between antipasti and dolci, Roman cuisine unfolds as a living culture: authentic, unpretentious and deeply rooted.

Alongside iconic recipes such as cacio e pepe, carciofi alla romana and saltimbocca, the book opens doors to hidden trattorias, markets and cafés that lie far off the beaten track. Anecdotes, historical context and precise insider tips make it clear why food in Rome is always about identity too. A book that combines travel and cuisine – and inspires you to experience Rome with all your senses, whether you’re there or at home.

INFO
A Guest in Rome
Author: Stefan Maiwald
Photography: Andrea Di Lorenzo
Publisher: Callwey
Length: 224 pages
ISBN: 978-3-7667-2822-7
Price: €45.00
Publication date: September 2025

Book tip: HADN – The Buckwheat Cookbook

A local supergrain that bridges tradition, modernity and the future

Buckwheat, affectionately known as ‘Hadn’ in Southern Carinthia, is one of those products that quietly disappeared – and is now making a natural comeback. HADN – The Buckwheat Cookbook is dedicated to this almost forgotten powerhouse grain with remarkable dedication: rooted in culinary, cultural and regional traditions.

Together with the Klopeiner See – South Carinthia – Lavant Valley tourism region, food expert and editor cookingCatrin (Catrin Ferrari-Brunnenfeld) embarks on a journey to the roots of Carinthian ‘Hadn’. The book combines over 55 creative sweet and savoury recipes with in-depth background knowledge – from cultivation and history to its modern-day significance as a gluten-free, nutrient-rich superfood. Buckwheat is not only presented as flour, but also as semolina or rice: given a modern twist, suitable for everyday use and surprisingly versatile.

INFO
HADN – The Buckwheat Cookbook
Authors: Catrin Ferrari-Brunnenfeld (cookingCatrin)
Publisher: Klopeiner See Tourism Region – Southern Carinthia – Lavant Valley / KSL Tourismus Marketing GmbH
Length: 180 pages
ISBN: 978-3-200-09933-3
Price: €24.90
Publication date: September 2025

quick & dirty
Modern kitchen technology © Rational
Sustainability meets efficiency

Intelligent cooking systems, resource-saving water technologies and well thought-out processes: new studies and practical examples show how digitalization and sustainability go hand in hand in professional kitchens. What the industry can learn from this – and why investing in smart systems is worthwhile.