There is no single best way to remove benzene and BTEX from wastewater. The right method depends on concentration, flow, the other contaminants present and what the plant wants to do with the recovered hydrocarbons.
Air or Steam Stripping
Moves volatile compounds from the water into a gas stream. Effective for volatile compounds, but the off-gas must then be captured or treated, so it can shift the problem to air.
Adsorption
Passes water over a media that holds the BTEX. Works well at lower concentrations and for polishing to tight specifications. The media needs replacement or regeneration.
Solvent Extraction and Recovery
Pulls hydrocarbons out of the water and recovers them. This suits streams where recovered material has fuel value, and avoids sending hazardous waste for disposal. Power Energy’s VC SORB process works in this direction, converting BTEX, VOCs and chlorinated hydrocarbons into reusable fuel.
Biological Treatment
Bacteria break down BTEX in a biological plant. It is economical for steady, moderate loads, but it is sensitive to shocks, and spikes of toxic compounds can upset it.
How to Choose
- Characterize the stream, including concentrations and other contaminants
- Check the discharge specification you must meet
- Compare options on performance, reliability, economics and life cycle cost
- Pilot test where the stream is unusual
Power Energy runs this process for plants in Saudi Arabia and the GCC. See benzene and BTEX removal and read where benzene comes from in refinery wastewater.
Talk to Power Energy
Send us your stream details, contaminants and flow rate. Call or WhatsApp +966 56 278 9535 or email sales@powerenergy.com.co.