Inefficient sludge fermentation process

The operations of the WWTP can be more efficient.

Sewage sludge conversion into biogas has been applied for a number of years. However, the conventional mesophilic fermentation can be optimized to achieve a higher yield.

Thermophilic fermentation is a process where fermentation processes are conducted under higher temperatures. As a result, higher conversion rates are achieved, producing more biogas at certain sludge residence times.

• Thermophilic fermentation leads to a better degradation of (organic) dry matter. As a result, more energy can be generated.
• Reduction of sludge processing costs.
• Nitrogen is removed from te sewage sludge.
• The thermophilic fermentation process is easily implemented at existing fermentation installations.