Project Background<\/strong><\/p>\n

The Egyptian Ethylene and Derivatives Company (ETHYDCO) is a joint venture company established with the purpose of producing Ethylene, Butadiene and their derivatives (Polyethylene, Poly Butadiene).<\/p>\n

As part of ETHYDCO\u2019s petrochemical complex in Alexandria, a 460,000 T\/Y ethylene plant and a 20,000 T\/Y butadiene extraction plant was built.<\/p>\n

For its water needs, ETHYDCO took the initiative to\u00a0contract a zero liquid discharge plant that is the first\u00a0of its kind in Egypt. The feed water to the plant is a mix\u00a0of treated effluent and Nile River water. Due to the high\u00a0variability of the inlet feed water, technologies designed\u00a0to operate over a wide range of feed conditions were\u00a0evaluated.<\/p>\n

QUA\u2019s FEDI was chosen due to its capability to handle\u00a0variable feed conditions with its two-stage design.<\/p>\n

FEDI Model<\/strong>: FEDI-2 30X
\nNo. of Streams<\/strong>: 2 x 465 gpm (2 x 105 m3\/hr)
\nNo. of Stacks<\/strong>: 60
\nSilica as SiO2<\/strong>: < 20 ppb
\nConductivity<\/strong>: 0.1 mS\/cm<\/p>\n

QUA Solution<\/strong><\/p>\n

QUA successfully supplied its Fractional Deionization\u00a0(FEDI\u00ae) stacks for the RO permeate treatment. This\u00a0treated water is demineralized for cooling tower\u00a0blowdown uses at the plant.<\/p>\n

The complete treatment system comprises a membrane pretreatment system, a High-Efficiency Reverse Osmosis (HEROTM) system, followed by FEDI. A brine concentrator, crystallizer, and sludge treatment system are also employed to ensure ZLD capability.<\/p>\n

The FEDI system successfully treats single pass RO water to be used for cooling tower blowdown. The water treated by FEDI exceeded the plant\u2019s requirements, particularly in the removal of silica which was possible due to FEDI\u2019s enhanced design.<\/p>\n

About QUA<\/strong><\/p>\n

QUA is an innovator of advanced membrane technologies that manufactures and provides filtration products to\u00a0address the most demanding water challenges.<\/strong><\/p>\n

FEDI\u00ae Electrodeionization<\/strong><\/p>\n

Fractional Electrodeionization (FEDI) is an advancement of EDI technology that was developed to address the limitations of conventional EDI. FEDI is a patented two-stage process that operates in a dual voltage configuration to reduce hardness scaling that may occur in conventional EDI.\u00a0FEDI\u2019s unique design maintains an acidic condition in the\u00a0first stage and basic condition in the second stage of the\u00a0electrodionization concentrate chamber. This patented\u00a0design reduces mineral scaling in the first stage and\u00a0enhances silica removal in the second stage.<\/p>\n

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