Municipal

In the late 1980s, the legal requirements for N-elimination became stricter for German wastewater treatment plants. The operators of the Geiselbullach sewage treatment plant therefore decided to convert the existing conventional activated sludge system into an IFAS process and tested various growth carriers. In 1996, after several years of trials, the final decision was made in favor of Cleartec® BioCurlz and it was installed in both aeration tanks. For more than 17 years, the IFAS system provided the required effluent quality. But over time, the ceramic diffusers broke. For these reasons, the operator decided to replace the entire system, but to continue using Cleartec® technology. The installation began in spring 2013 and was approved a few months later. Since then, the system has been running stably and continues to safely comply with all discharge values.