Thickening is the process used to increase the solids content of sludge by the separation and removal of a portion of the liquid phase.  Gravity thickening makes use of the force of gravity as the main agent in the settling and thickening process.
    
The thickening of sludge plays an important role in reducing capital costs relating to the provision of sludge handling equipment and the operational costs of the handling and treatment of the sludge.  What is not generally realised is that, both in terms of capital outlay and operating cost, sludge handling usually accounts for over 50% of overall treatment costs.    

Methods    
*There are three accepted methods used for pre-digestion sludge thickening:    
*Gravity thickening    
*Dissolved air flotation thickening    
*Centrifugation    
*Gravity thickening is the method most commonly used in India


Thickening is the process used to increase the solids content of sludge by the separation and removal of a portion of the liquid phase.  Gravity thickening makes use of the force of gravity as the main agent in the settling and thickening process.
    
The thickening of sludge plays an important role in reducing capital costs relating to the provision of sludge handling equipment and the operational costs of the handling and treatment of the sludge.  What is not generally realised is that, both in terms of capital outlay and operating cost, sludge handling usually accounts for over 50% of overall treatment costs.    

Methods    
*There are three accepted methods used for pre-digestion sludge thickening:    
*Gravity thickening    
*Dissolved air flotation thickening    
*Centrifugation    
*Gravity thickening is the method most commonly used in India

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