Heat recovery from laundry wastewater

BUCO falling film chiller for heat recovery from laundry wastewater

Laundry waste water is highly contaminated. Our BUCO falling film chillers with its cleaning option through smooth stainless steel surfaces, as well as possible cleaning during operation without loss of performance, is the ideal device for its purpose. Made entirely of stainless steel and with dimensions that can be adapted to the respective space conditions on site in terms of length, width and height, the BUCO falling film chiller is an unbeatable alternative in this heat recovery application. Powerful due to the high heat transfer coefficients (up to 2000 W/m2 K) due to its installation for heating the laundry waste water.

The initial situation

In laundries, large quantities of hot water are needed for washing. At the same time, the same amount is produced as warm wastewater. This wastewater is heavily contaminated.

How has it been done so far?

Until now, in most cases the warm dirty laundry wastewater was discharged into the public sewer system. At the same time, expensive heating oil or gas is burnt to heat the same amount of water.

Why the use of BUCO falling film chiller now?

The contaminated laundry waste water produced has a temperature of between 25 and 50 ° C. The cold fresh water from the mains is fed into a falling film chiller at 10 - 15 ° C and preheated to 20 - 45 ° C by the warm waste water flowing past outside, depending on the design and size of the system. The falling film chiller is made entirely of stainless steel and, due to its smooth surface and offers no starting points for contamination due to its smooth surfaces. Periodic cleaning is possible without any problems and without much effort. The wall thicknesses of the heat exchange plates are designed according to the water pressures.


Heating oil and gas consumption can be reduced by 50 % by installing the BUCO falling film chillers to heat the laundry wastewater. Amortisation in the shortest possible time is guaranteed.

We have always assimilated engineering science and thermodynamics optimally in the various manufacturing processes.

Thermodynamicists,mechanical engineers and welding engineers define the dimensioning, design and construction of customised heat exchanger panels and systems in materials ranging from mild and austenitic steels through to titanium, and ensure successful distribution of their work worldwide.

In doing so they fall back on production engineering expertise and calculations developed in the course of the past hundred years that are still being continuously optimised in an ongoing process.

In the perception of our customers, the Buco product stands for:

Technical and process-oriented consulting
Thermodynamic efficiency
Quality and longevity