Zero liquid discharge (ZLD) helps chemicals company reduce reliance on the River Nile
Aquatech’s zero liquid discharge project designed for the Egyptian Ethylene and Derivatives Company reducing a reliance on the River Nile has now been commissioned...
ALEXANDRIA, Egypt – Aquatech’s zero liquid discharge (ZLD) project designed for the Egyptian Ethylene and Derivatives Company (ETHYDCO) reducing a reliance on the River Nile has now been commissioned.
Awarded three years ago, the plant is installed at ETHYDCO’s petroleum derivatives production facility at Alexandria and treats wastewater and cooling tower blowdown, in the process creating cooling tower makeup water, boiler feed water to achieve ZLD.
The feed to the plant is 1119 m3/hour – a composite mix of treated effluent and water from the Nile River, which experiences inconsistent water chemistry and unpredictable fluctuations throughout the year.
After studying three years of data, Aquatech developed a process design that could operate at seven pre-defined scenarios and adapt to prevailing site conditions.
Components of the supplied system include a microfiltration system and High Efficiency Reverse Osmosis technology for achieving more than 97% recovery across membrane systems.
This is followed by QUA Fractional Electrodeionization for high quality demineralized water production, a two-stage thermal system consisting of a brine concentrator and crystallizer to achieve ZLD, and a sludge treatment system.
Aquatech’s solution has resulted in the fresh water demand being reduced by 70%, from 2600 m3/hour to 800 m3/hour.
The company said it has delivered “more than 160 ZLD installations on six continents”.