Partial ozonation of activated sludge to reduce excess sludge, improve denitrification and control scumming and bulking.

@article{Bhler2004PartialOO,
  title={Partial ozonation of activated sludge to reduce excess sludge, improve denitrification and control scumming and bulking.},
  author={Marc B{\"o}hler and Hansruedi Siegrist},
  journal={Water science and technology : a journal of the International Association on Water Pollution Research},
  year={2004},
  volume={49 10},
  pages={41-9}
}
Disposal of sewage sludge is forbidden and agricultural use of stabilized sludge will be banned in 2005 in Switzerland. The sludge has to be dewatered, dried, incinerated and the ashes disposed in landfills. These processes are cost intensive and lead also to the loss of valuable phosphate resources incorporated in the sludge ash. The implementation of processes that could reduce excess sludge production and recycle phosphate is therefore recommended. Partial ozonation of the return sludge of… CONTINUE READING

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