Hydrothermal Carbonization (HTC) Technology for Sewage Sludge

The hydrothermal carbonization (HTC) process involves:

• Treating sewage sludge with a dry matter content of 8–12%,
• At a temperature of 200–220°C,
• Under pressure of up to 24 bar,
• For an appropriate duration, typically 2 to 6 hours.

Process parameters are individually adjusted based on:

• The type of sewage sludge,
• Its properties,
• The desired process outcomes.

Characteristics of Biochar Produced in the HTC Process

Biochar, depending on the type of sewage sludge and the conditions of the HTC process, has various potential applications:

1. As an alternative fuel,
2. As a soil conditioner,
3. As an additive for the production of lightweight construction aggregates,
4. As a feedstock for the gasification process, enabling the production of syngas
   • Profitable only for sludge not subjected to methane fermentation.

The HTC process represents a modern and efficient approach to sewage sludge management, enabling its utilization in an eco-friendly and economically viable manner.

UiK HTC Technology: