Application of electro acoustics for dewatering pharmaceutical sludge
Application of electro acoustic principles for dewatering has been developed by Battelle Institute. The Department of Energy, Battelle Institute, and Ashbrook-Simon-Hartley, have jointly developed an Electro Acoustic Dewatering press (EAD press). The EAD press applies a combination of mechanical pressure, electrical current and ultrasonics. This press is utilized after conventional dewatering devices and can remove up to 50% water from filtered sludge cake at a fraction of the cost incurred in existing thermal drying devices. The dominant mechanism of sludge dewatering by EAD press is electro-osmosis due to the application of a direct current field. Electro-osmosis is caused by an electrical double layer of oppositely charged ions formed at the solid liquid interface, which is characterized by zeta potential. The ultrasonic fields help electro-osmosis by consolidation of the filter cake and by release of inaccessible liquid. The EAD press has been tested successfully on a variety of materials including apple pomace, corn gluten, sewage sludge, and coal fines. A three week long full scale trial was conducted successfully at a pharmaceutical industry to determine the application of this technology for dewatering waste activated sludge.
- OSTI ID:
- 7080530
- Journal Information:
- Environmental Progress; (United States), Vol. 11:1; ISSN 0278-4491
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COAL FINES
WATER REMOVAL
SEWAGE SLUDGE
CHEMICAL INDUSTRY
DEWATERING EQUIPMENT
ELECTRIC CURRENTS
INTERAGENCY COOPERATION
OSMOSIS
PRESSES
SEPARATION EQUIPMENT
SLUDGES
TECHNOLOGY TRANSFER
ULTRASONIC WAVES
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
CARBONACEOUS MATERIALS
COAL
CONCENTRATORS
COOPERATION
CURRENTS
DIFFUSION
ENERGY SOURCES
FOSSIL FUELS
FUELS
INDUSTRY
MATERIALS
REMOVAL
SEWAGE
SOUND WAVES
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
320604 - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Municipal Waste Management- (1980-)