Case Studies

WABAG has set up a plant to treat a cocktail of PTA process effluent streams generated from expansion of the PTA and PET plants in Dahej, Gujarat. It is the largest recycling plant for PTA Effluent in India. A tailor-made, advanced process design was employed, combining the activated sludge process (MBR) and anaerobic treatment (UASB) in a single unit.

The recycling plant comprises ultrafiltration and reverse osmosis technologies; purified water is reused as utility water (80% recovery rate). The biogas generated during anaerobic treatment (34,000 m³/d) is used as flue gas for plant utility purposes providing about 40% savings in heating costs.

Package

• Module 1 – Converting effluent streams like process effluents from Polyester Staple Fibre plant, oily water stream, sanitary wastewater and treated effluent from existing effluent treatment plant & cooling tower blow down to reuse quality with 80% recovery.
• Module 2&3 – Process effluents from Poly Terephthalate Acid (PTA) and Poly Ethylene Terephthalate (PET) production & demineralisation water effluent treated to reuse quality with Up-flow Anaerobic Sludge Blanket Reactor (UASB), Membrane Bio Reactor (MBR), Ultra Filtration and Reverse Osmosis.