Refining – Turkmenistan
For a large-scale modernization project at the Turkmenbashi Complex of Oil Refineries (TCOR) in Turkmenistan, Petrogas partnered with Cannon Artes for the implementation of a large scale technologically trend setting effluent treatment plant.
The Turkmenbashi refinery, located on the Krasnovodsk Gulf of the Caspian Sea, in one of Turkmenistan’s two oil-processing facilities.
In late 2013 London-listed PetroGas LLP was selected by Turkemnbashi Complex of Oil Refineries as the EPC contractor for a vast rehabilitation program including the reconstruction of water supply, petrochemical plants and the construction of a modern waste water treatment plant.
For the latter, PetroGas decided to partner with the water treatment specialist Cannon Artes, a well-known name in the Oil & Gas sector.
PetroGas, who are already very much accustomed to the ambient conditions in Turkemenistan, took care of the land clearing, execution of civic works, mechanical installation, electrical and instrumental wiring and cabling, automation of the entire system as well as the site services including commissioning and start-up.
Cannon Artes focused on the technological part while providing the overall process design and the detailed engineering of the skid-mounted units: pre-fabrication of the critical equipment was done in Cannon Artes’ own factory in Salerno, Italy.
The effluent treatment plant has an overall capacity in excess of 1,000 m3/h, among the largest industrial waste water treatments (WWT) in the world. It is arranged on four waste water treatment trains, a mobile sludge dehydration unit and a sanitary water treatment system.
Nonetheless capacity is not the sole challenge. In order to meet extremely stringent limitations on the concentration of various chemicals species in the treater water outlet, each train has been designed to incorporate an oil separation section, a biological oxidation and a tertiary treatment.
Oil separation is featuring Coalescing Plates Interceptors (CPI) and dissolved air flotation.
The biological section features the “state-of the art” Membrane Bioreactor (MBR) technology that guarantees an extremely efficient oxidation of the organic substrate with a quantitative separation of all suspended solids, bacteria and viruses as only an ultrafiltration membrane can do.
The tertiary treatment, which is in most cases useless downstream an MBR unit since all solids and bacteria are removed there, is targeted to the selective removal of those organic molecules that are difficult to be biologically oxidized.
An Advanced Oxidation Process (AOP) with Hydrogen Peroxide Injection, a specifically developed catalyzer and an adsorption unit is therefore implemented to get rid of residual aromatics and toxic compounds down to parts per billion levels.