Hydrodynamic Cavitation

Does anyone have the experience with the application of cavitation in sludge treatment process?

Abstract Disintegration by hydrodynamic cavitation has a positive effect on the degree and rate of sludge anaerobic digestion. By applying hydrodynamic disintegration the lysis of cells occurs in minutes instead of days.

The intracellular and extracellular components are set free and are immediately available for biological degradation which leads to an improvement of the subsequent anaerobic process.

Hydrodynamic disintegration of the activated sludge results in organic matter and a polymer transfer from the solid phase to the liquid phase, and an increase in COD value of 284 mg∙ℓ-1 was observed, i.e. from 42 mg∙ℓ-1 to 326 mg∙ℓ-1.

In addition the degree of disintegration changed from 14% after 15 min disintegration to 54% after 90 min of disintegration. A disruption of bacterial cells by hydrodynamic cavitation has a positive effect on the degree and rate of excess sludge anaerobic digestion.

The cells of the activated sludge micro-organisms rupture and addition to the digestion process leads to increased biogas production. The hydrodynamic disintegration of activated sludge leads to a higher degree of degradation and higher biogas production. Adding the disintegrated sludge (10%, 20% and 30% of volume) to fermentation processes resulted in an improvement in biogas production of about 22%, 95% and 131% respectively.

Media

Taxonomy

• Treatment
• Anaerobic Digestion
• Sludge Treatment
• Sludge Management
• Purification
• Water Quality
• Waste Management
• Water & Wastewater

1 Comment

1. Extremely interesting.

   We work in sludge removal and bio digestion.  In many cases we use cavitation devices to assist our fully organic solution in the removal of sludge and increased levels of bio gas production.

    

   WWW.SOLECO-TECHNOLOGY.COM

    

   Hugh.