Sonication is a sludge pre-treatment before entering into an anaerobic digestion, achieving an increase in biogas production up to 15-20%.

In a wastewater treatment plant, only a fraction between 40% and 60% of biological sludge before mixing with primary sludge, must be treated.

This percentage of biological sludge enters the sonicator with a continuous feed flow so that the hydraulic retention time can be up to 1 hour..

Inside, there can be up to 12 oscillators that emit waves at high frequency, breaking down the cell membrane and releasing its content into the middle.

Once the sonicated sludge leaves the sonicator is mixed with the primary sludge, and together, are fed to the anaerobic digester.

In addition to the increase in biogas production, greater sludge dryness up to 30% may be achieved after dewatering, while reducing the consumption of polyelectrolyte.

Digested sludge is even more stable since performance in volatile solids removal can be increased from a typical value of 45% up to 55-60%..

The advantages of this system over investment and operating costs make it highly efficient, with a return period of less than 4 years.

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