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Inefficient sludge fermentation process

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Issue

Inefficient operation waste water treatment plant

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.

Solution

Thermophilic fermentation

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.

Pros

  • 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.

Characteristics

  1. Topic Water chain
  2. Development state 6: System/subsystem model or prototype demonstration in a relevant environment
  3. Setting type Rural area
  4. Water type Waste water, Effluent
  5. Project period 1-3 years