Waste becomes a valuable resource – 35 years of sustainable gypsum production at Liapor

February 2026

The reference at a glance

Project

Long-term operation of belt filters for gypsum dewatering

Technology

BHS Indexing belt filter

Operating site

Liapor company in Hallerndorf, Forchheim district

Application

Dewatering of gypsum / mineral by-products

Solution

Robust, durable belt filter technology for continuous industrial use (since 1990)

With the gradual phasing out of coal-fired power plants, gypsum from flue gas desulphurisation is becoming increasingly scarce. At the same time, demand for high-quality mineral raw materials is rising in the construction industry. For companies such as Liapor, a specialist in building material solutions, the efficient use of by-products is therefore becoming strategically important.

The processing of mineral by-products is technically demanding. Dewatering in particular requires robust and permanently reliable systems – often under the harshest environmental conditions, such as abrasion and corrosion, and always in continuous operation.

For Liapor, the focus was on one key requirement: process stability and investment security over decades.

The solution is provided by a BHS belt filter built in 1990: the plant has now been in continuous industrial use at Liapor for 35 years – reliable, efficient and resilient under demanding operating conditions.

The belt filter guarantees:

Constant dewatering performance
High plant availability
Stable product quality
Economical operation with low lifecycle costs

For Liapor, this means planning reliability, minimised downtime and sustainable use of mineral by-products.

The 35 years of continuous operation are the result of well-thought-out design, robust construction and high-quality manufacturing. And this longevity pays off in many ways, including long-term investment security, reduced replacement investments and resource conservation through long-term use of the plant.

The project shows that sustainability is not only achieved through new technologies, but also through technology that reliably creates value over decades.