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PubMed2005

Innovative energy interaction with a waste incineration plant leads to advanced biological P- and COD-removal and costs reduction of the extension of Nijmegen wastewater treatment plant.

The extension of the Nijmegen wastewater treatment plant for full nitrogen and phosphorus removal is enormously reduced by introducing an innovative energy interaction with an incineration plant. A reduction of the investment costs of 30-40% has been reached. Heating up a part of the primary sedimentation overflow leads to a constant process temperature of 20-25 degrees C and an advanced biological phosphorus and COD removal.

Incineration↗

PubMed2002

Bulking sludge solved?!

At present there is still no final theory explaining the bulking of activated sludge. Previous investigations showed that the sludge settling properties become better and more stable when more plug flow conditions are implemented in wastewater treatment plants for biological nutrient removal. In this research the effect of the process configuration (4 wwtp with fully biological nutrient removal) on the sludge settling properties has been investigated. The results show that a separate anoxic reactor can not avoid the presence of LCFA for the growth of M. parvicella in the anaerobic reactor. A SVI < 120 ml/g could be achieved by: of a separate anoxic reactor with plug flow conditions, introducing of a strictly anaerobic reactor (UCT-modification), implementation of an extra anoxic/aerobic reactor, maintaining a high oxygen concentration (> 1.5 mg/l) and creating a low ammonium concentration (< 1 mg/l) in the aerobic reactor.

Actinobacteria↗