The growing restriction of the agricultural use of sewage sludge is associated with mounting pressure on municipalities and sewage treatment providers to employ energy-saving sludge stabilisation in an anaerobic reactor and utilisation of the digestion gas for the generation of energy.
The administrative partnership Burgebrach in Bavaria, Germany, is one of the municipal organisations that have decided to consistently reduce the sludge volume and make use of the sewage gas. Accordingly, the technical operator SüdWasser GmbH has recently commissioned WELTEC BIOPOWER, the biogas plant manufacturer as the general contractor for the setup of an anaerobic digestion unit and the utilisation of the sewage gas for the generation of energy in the combined heat and power (CHP) plant for the existing wastewater treatment plant. In addition to the aerobic treatment stage, the organic material will be subjected to anaerobic treatment starting from April.
To ensure optimum treatment of the daily influx of 16 m³ of raw sludge with a dry matter content of 4 to 4.5 percent, a specially designed V4A stainless-steel digester has been installed. In it, a diagonally installed long-axis agitator will mix the sludge in order to carefully promote the microbiological transformation to methane.
The procedural approach of WELTEC BIOPOWER and the modular stainless-steel tanks have already resulted in a significant improvement of existing wastewater systems in various countries.
