The ultrasonic cleaning technology, pioneered and developed by innovators like Hilsonic, one of the UK largest ultrasonic cleaner manufacturers, gains momentum confidently. With the appearance of cheaper ways to produce ultrasonic equipment, more and more industries have started making use of a high quality cleaning approach. With the latest developments ultrasonic capabilities have been applied into a conceptually different area – water treatment. So how does it work? Technologically, the process has much in common with ultrasonic treatment. The article focuses on the mechanisms used in an average ultrasonic water treatment machine.
How it works
Contaminated water by gravity or pressure is fed to the first compartment via the tube. The water is supplied to the first compartment and movement speed decreases sharply due to increased volume. Reducing the liquid flow rate results in that the liquids, oil and oil product pollutants are displaced upwards and water collected on the surface under the influence of gravity. Simultaneously solid contaminants such as sand and insoluble impurities settle to the bottom of the container. Water flows from the pollutants section into the compartment by vertical partitions specially arranged across the width of the compartment, forcing the fluid to change direction, in the vertical plane and horizontal. Due to this, the gap is increased and residence time of the liquid in the container reduced. The result is a complete separation of solids and light impurities from the water. Purified from light pollution and contamination water is fed to a cluster of filters for coarse water and divided into two streams. One (less flow) directed force to block developments reagents; this unit has enough water and hydroxyl radicals, ozone gas, which are strong oxidants. With the help of these reagents an intense coagulation of fine mists and oxidation of reactive and biological impurities takes place. Accumulated reactant is fed into a receiver vessel and mixed with the flow of the cleaning liquid. At the bottom of the receptacle perpendicular to the direction of movement of the magnetic fluid treatment unit is installed, together with the reagents which can increase the rate of oxidation and coagulation of fine suspensions, chemically active metals and organic compounds. The second larger flow of fluid cascade is directed by gravity to drain.
The proposed treatment options with a clarifier sludge blanket guarantee simultaneously the following processes:
- coagulation of colloidal fine particles;
- limiting the oxidation of easily oxidized organic pollution hydroxyl radicals to carbon dioxide and water;
- passage of chain reactions of oxidation of difficult to be oxidized organic pollution with their transfer from the dissolved state in the insoluble residue. The initiator of the chain reactions are hydroxyl radicals and ozone-oxygen mixture. Hydroxyl radicals have high bactericidal capacity together with ozone (greater than gaseous chlorine).
- and the oxidation of metals of variable valence ions (divalent to trivalent aluminum, nitrates, nitrites, sulfites, sulfates, etc);
- clarification of water (remove sediment from runoff).
Forcibly separated light contaminants are removed by a pump from a container in a separate container for further processing and preparation of these respective items. The entire work cycle described is performed automatically and does not require additional reagents takes place without the use of expensive reagents and materials, potentially affecting the environment, occupies a small area and can significantly reduce maintenance cost.
The cleaners are intended for the treatment of domestic and industrial wastewater, stormwater runoff from refineries and other industrial facilities. Plants can successfully apply such cleaners for treatment of alcohol stillage, water-fuel mixtures and etc.