by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves

Full Title

Treatment of sludge; Devices therefor > by de-watering, drying or thickening > by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves

Classification Context

Section:

CHEMISTRY; METALLURGY

Class:

TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Subclass:

TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Scope Notes

Limiting references: De-watering or drying of sludge by heating using electromagnetic or ultrasonic waves