Our patented Direct Steam Injection (DSI) heating systems work by mixing steam and process liquids completely while delivering consistent temperature and instantaneous heating.

This requires keeping the sludge within an optimal range, typically 35–40°C (95–104°F) for mesophilic digestion or 50–60°C (122–140°F) for thermophilic digestion to aid in the anaerobic digestion process by keeping microorganisms at the required temperature to optimize effectiveness and increase methane gas production to power the boilers, leading to impressive benefits:

• Thousands of dollars in energy savings and lower production costs
• Heating flexibility from startup to shutdown to maintenance mode
• Precise temperatures without fear of scalding
• Reduced maintenance thanks to straight flow-through designs
• Space savings from compact, inline designs

Direct steam heating for sludge and grit

Heating sludge and grit-laden streams calls for a heater that won’t plug. The NOH™ Non-Obstructing Heater’s unrestricted flow path handles abrasive solids with reliable temperature control and minimal maintenance, making it one of the lowest-maintenance direct steam heaters for wastewater treatment.

See how the NOH handles sludge and grit