[이집트] 국가 최초로 폐수 ZLD 공장 가동
아쿠아테크(Aquatech)가 설계하고 공급한 수처리 시설의 일부인 이집트의 최초 폐수 무방류(ZLD, zero liquid discharge) 공장이 가동되었다.
이 시스템은 알렉산드리아에 있는 Ethylene and Derivatives Company(Ethydco)의 석유 유도체 생산시설에 설치되어 액체 배출을 제로로 달성하고 담수의 수요를 2천600㎥/h에서 800㎥/h까지 70% 감소시킨다.
이 공장의 물은 나일강에 의해 공급되며 강물의 수질보호를 위해 설계되었다.
1천119㎥/h의 공급량은 처리된 물과 나일강의 혼합물이다.
아쿠아테크는 3개의 사전 시나리오에서 작동 할 수 있는 프로세스를 설계하기 위해 3년간의 데이터를 연구하여 현장 조건에 적용했다.
Ethydco는 에틸렌과 기타 석유 유도체를 생산하며, 공장은 냉각탑 보충수 및 보일러 급수를 얻고 폐수 무방류(ZLD)를 달성하기 위해 설비 및 냉각탑 배출장치에서 나오는 폐수를 처리한다.
[원문보기]
Egypt's first ZLD plant is up and running
The first zero liquid discharge (ZLD) plant in Egypt, part of a water treatment facility designed and supplied by Aquatech, has been commissioned.
Installed at Egyptian Ethylene and Derivatives Company (Ethydco)'s petroleum derivates production facility at Alexandria, the system achieves zero liquid discharge, and reduces fresh water demand by 70 per cent, from 2,600 m3/h to 800 m3/h.
The plant is fed by the River Nile, and is designed to protect the river's water quality.
The feed of 1,119 m3/h is a composite mix of treated effluent, and River Nile water that fluctuates and has inconsistent chemistry. Aquatech studied three years of data to design a process that can operate at seven pre-defined scenarios, adapting to prevailing site conditions.
Ethydco produces ethylene and other petroleum derivatives as the site. The plant treats wastewater from the facility and cooling tower blowdown to get cooling tower makeup water and boiler feed water, and to achieve ZLD.
The solution integrates a combination of technologies and equipment configurations, including a micro-filtration solution, and High Efficiency Reverse Osmosis (HERO) technology that achieves more than 97 per cent recovery across membrane systems. This is followed by QUA Fractional Electrodeionization (FEDI), to produce high quality demineralised water; then a two-stage thermal system comprising a brine concentrator and crystalliser to achieve ZLD, and a sludge treatment system.
"We are an innovator in ZLD technologies, and a pioneer in hybrid ZLD. We have more than 160 ZLD installations on six continents. Our experience positions us uniquely to help customers in all segments of industry to achieve increasingly strict environmental goals," said Aquatech principal process engineer, Robert Sweetman.
Aditionally, Aquatech has installed seawater desalination systems and water reuse plants in Egypt.
[출처 = Desalination & Water Reuse / 2017년 1월 14일]