Suez’ patented Pegasis™ technology is a multi-stage treatment system specifically designed to remove high levels of insoluble and soluble hydrocarbons, including BTEX, with very low OPEX and waste generation. The number of stages and technology used are chosen to best meet your water treatment criteria. If required, an optional biological treatment stage is included as a final polishing step before effluent disposal.
The Pegasis system can include the following stages:
1. Deoiling – deoiler hydrocyclones remove insoluble (free) hydrocarbons
2. Gas Stripping – a counter-current gas stripping column is used to remove the bulk of the soluble, volatile hydrocarbons (e.g. BTEX)
3. Polishing – a regenerable or non-regenerable adsorbent removes soluble hydrocarbons to very low levels
4. Biological treatment – specialised biomass degrades soluble, non-volatile organics (e.g. MEG, methanol) to CO2, water and additional biomass. A range of biological treatments are available to meet your COD, BOD and TOC effluent targets.