High-Loaded Activated Sludge - Improvement of a Solids Retention Time Controlled System
The Sjölunda wastewater treatment plant faces the challenge of tougher demands for the quality of the water leaving the plant and entering the Öresund strait between Denmark and Sweden. At the same time, the population of Malmö with neighbourhood is growing rapidly, which means an increase in the loading on the plant. The residence time for the active microbes, the “sludge”, in the first biologicaAlthough 100 years old, the activated sludge system remains inevitable for modern wastewater treatment. Advancements within the development of mainstream nitrogen removal techniques based on anaerobic ammonium-oxidising bacteria have renewed the interest in traditional, high-loaded activated sludge systems for COD removal only. In order for activated sludge plants to be efficient in terms of energ