Complete survey of German sewage sludge ash.

  title={Complete survey of German sewage sludge ash.},
  author={Oliver Kr{\"u}ger and Angela Grabner and Christian Adam},
  journal={Environmental science & technology},
  volume={48 20},
The amount of sewage sludge produced worldwide is expected to further increase due to rising efforts in wastewater treatment. There is a growing concern against its direct use as fertilizer due to contamination of the sludge with heavy metals and organic pollutants. Incinerating the sludge degrades organic compounds almost completely and concentrates heavy metals and phosphorus. However, the sewage sludge ash (SSA) is almost completely disposed of and with it all resources are removed from the… CONTINUE READING

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