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Model TDS806 -Cavitation Stripping Gases
Hydrodynamically generated cavitation is a powerful tool to strip dissolved gases from water and effluent. The substantial pressure drop in cavitation systems, causes dissolved gases to come out of solution. Global Advantech’s cavitation scrubbing systems are designed to maximise generation of hydrodynamic cavitation using water pumped at high pressure. Cavitation stripping may be used for many applications, including: Stripping methane, ammonia and hydrogen sulphide from landfill leachate. Stripping methane, volatile hydrocarbons and hydrogen sulphide from produced water in oil and gas production. Stripping methane from aqueous muds used in drilling some oil and gas wells.
Cavitation systems are highly efficient at forcibly aerating/oxygenating anoxic water. When the water jets in cavitation systems travel through air (or oxygen), they draw substantial quantities of air into their pressure recovery chambers. The high pressures in these chambers dissolve the air into the anoxic water rapidly increasing dissolved oxygen levels. Conditions present in the cavitation units can also promote oxidation of some organic compounds, sulphides and ammonia. Applications include: Emergency oxygenation of surface water, e.g. treating a stream after contamination by an accidental discharge of sewage or animal slurry. Oxygenation of industrial effluent prior to aerobic biodegradation treatment.
The other important use of cavitation is in the physical control of organisms/biological contamination in water. Where the energy releases and shockwaves from cavitation are used to destroy (lyse) the cells of bacteria, algae, larvae, etc. Treatment applications for use of cavitation for biological control include: Cooling tower water. Ship’s ballast water. Groundwater, water from rivers, lakes, etc., in hydraulic fracturing to recover shale gas/coal-bed methane. Water treatment and effluent treatment.