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:: Lime in sludge treatment
 Why use lime in sludge treatment ?
 Lime as a flocculation agent
 Lime for hygienisation
 Lime to decrease phosphorous
 Lime for odours reduction

 

 

Lime in sludge treatment > Why use lime in sludge treatment ?

 

Why use lime in sludge treatment ?

 

Usually urban waste water "sewage" sludge is treated with lime to ensure a safe, easy and secure agricultural recycling without negative effects on environment.  Therefore lime has different functionalities : 

     
  1. Lime plays an important role in sludge conditioning :

    2.  

      • Flocks formation
      • Filtration aid
      • Obtention of a better structure, a better workability and better storage properties.

     

  2. Lime has an effect in sludge hygienisation :

    3.  

      • Destruction of pathogens (bacteria, viruses and parasites).

     

  3. Lime decreases phosphorous in waste water.

    4.  

      • Precipitates phosphorous of waste water in the dewatering sludge.

     

  4. Lime has an effect on sludge odours :

    5.  

      • Prevention of bad odours due to sulphides and fatty acids
      • Formation of NH3