Energy-efficient and decentralized biological wastewater treatment
In recent years biological wastewater treatment by fermentation has gained more and more interest. By utilizing anaerobic treatment biogas (energy) is produced as a by-product, which is a real benefit both economically and environmentally. For these reasons anaerobic wastewater treatment is installed in many industries, such as in the paper, milk and breweries.
Nowadays, biological wastewater treatment can efficiently remove carbon sources. The challenge lies in the purification and elimination of nitrogen sources. Currently, a step-wise purification process having many different consecutive steps with different reactors and ponds are in use. This step-wise and serial process is complex and needs a lot of space for the different treatment units. Thus, for an on-side and decentralized biological wastewater treatment a compact and efficient system is badly needed.
Scientists at the HAWK University of Applied Sciences and Arts, department of resource management, developed a compact on-side and and energy-efficient biological purification system for a decentralized wastewater treatment.
Schematic representation of energy-efficient and compact biological wastewater treatment (2-reactor-3-steps-process). Step 1: biodegradation, Step 2: biodegradation and nitrification, Step 3: Denitrification. Step 3 is performed in first reactor by partial recirculation. Source W. Ganagin.
Compact biological wastewater treatment particularly for decentralized on-side use in e.g. beverage or farming industry.
A first prototype is currently being installed for commercial application at first local customer.
A German priority patent application has been filed (Applicant: HAWK University of Applied Sciences and Arts).
Dr. Stefan Uhle