How to treat Petroleum Wastewater by Induced Gas Flotation?
Water is purified using induced gas flotation (IGF), which removes suspended contaminants like oils and silt, in the treatment of petroleum and refinery wastewater. By adding gas bubbles to the wastewater, induced gas flotation removes suspended particles. A flotation tank or basin is used for this. As the tiny bubbles stick to the suspended material, it starts to float, which makes it simple for a skimming device to remove them.
The wastewater effluents from petrochemical plants, oil refineries, chemical plants, natural gas processing plants, and other industries, which release comparable wastewater effluents, are treated using this procedure most frequently.
Use of nitrogen gas
Due to the risk of explosion, the induced gas floatation devices in the oil industry do not employ air, as a medium for flotation. As a result, nitrogen gas is utilized to produce bubbles.
Production of gas bubbles in Induced gas flotation
The hydraulic operation of induce gas flotation devices enables total process containment, and effectively recovers oil from water streams. Oils and fine solid particles present in the water stream can be separated, and recovered with the use of induced gas flotation units, which produce gas bubbles that are spread throughout the entering stream. By sticking to the gas bubbles, the oil and solid objects float to the surface, where they are retrieved using a skimming equipment.
Working of induced gas flotation systems
The eductor generators fine bubble dispersion, a hydraulic base technology. In some systems, pressure dips brought about by off gassing in the production system, might result in fine bubble dispersion that is adequate for flotation. It is crucial that produced water and fine bubble dispersion are combined, to ensure that the fine bubble dispersion has not already formed in the produced water.
Some units use counter-current flow, where raw water enters the vessel from the top and fine bubble dispersion is supplied at the bottom. The produced water should not be short-circuited when using this procedure, since the tiny bubble dispersion can result in a less dense column of bulk fluid.
The interaction between the bubbles and droplets takes time
The oil droplets can easily interact with smaller bubbles. If the short circuit occurs to a large degree, the unit's efficiency is likewise reduced. Gravitational settling, similar to light centrifugal force, can be utilized in some induced gas flotation machines, to separate the two streams.
It's crucial to keep in mind, how weak the connection is between the droplet and the bubble. It is important to protect the bubble droplet pairs by preventing accelerations, and decelerations. By using froth skimmers, substantial amounts of water can be transported over the washer.
Types of IGF systems
There are two subtypes of induced gas flotation process:
1: Gas flotation that is hydraulically induced.
2: Mechanical-type induced gas flotation.
Induced gas flotation benefits
· It either needs a little or no chemical.
· Low manpower is needed for operation and maintenance.
· It has no internal moving components, which cuts down on maintenance time.
· High-efficiency oil removal from gas.
· No fugitive gas is released.
Manufacturers of Wastewater Treatment Plants in India
Netsol Water, based in Greater Noida, India, is a well-known manufacturer of water and wastewater treatment systems. We are well-known for being the top commercial RO plant manufacturers, industrial RO plant manufacturers, ZLD Plant manufacturer, sewage treatment plant manufacturers, Water Softener Plant Manufacturers, effluent treatment plant manufacturers, and much more. We employ various techniques in our wastewater treatment plants, which include aerobic/anaerobic processes, activated carbon, reverse osmosis, Induced gas flotation, etc.