De Nora Water Technologies to provide on-site hypochlorite generation systems for Singapore’s Johor River Water Works; offering a safe, economical and effective solution or drinking water disinfection at one of Singapore’s most important water source.
De Nora has clinched one of the largest water disinfection projects in Asia at the Johor River Water Works, the largest water works located in Malaysia.
This project will see a ClorTec 2250 on-site hypochlorite generator from De Nora replacing the existing liquid chlorine and ammonia systems at Johor River Water Works. In total, De Nora will provide 11 ClorTec 2250 unit across all three plants on-site. Each unit will be equipped with an electrolyser capacity of 1,020kg per day, exceeding the tender requirement of 900kg per day.
This win follows other successful projects with the water utility company in Singapore where De Nora ClorTec systems have been installed at multiple locations, including Chestnut Avenue Waterworks, located in the west of Singapore.
De Nora ClorTec 2250 on-site hypochlorite generation systems use three common consumables – water, salt, and power – to produce chlorine-based disinfectants by passing a solution of sodium chloride through an electrolytic cell and converting the chloride ions into sodium hypochlorite. According to De Nora, it provides a “safe, economical and effective solution for drinking water treatment without creating or transporting hazardous chemicals”, thus ensuring the safety of personnel and the surrounding community.
As part of the tender process for the Johor Water Works project, the ClorTec 2250 systems had to meet stringent performance and efficiency targets in Factory Acceptance Tests (FAT) across a period of six months. Of particular concern to the end user is the formation of by-products like chlorate, perchlorate and bromate. These by-products, the company added, are emerging contaminants of concern in water sources globally, and awareness of these contaminants is increasing in Asia.
De Nora ClorTec on-site hypochlorite generation systems are optimised to help minimise production of these by-products, especially chlorate. In tests performed at Chestnut Avenue Waterworks, De Nora demonstrated that on-site hypochlorite generation systems produced by-products such as chlorate and perchlorate at “4-6 times lower” than the recommended value set out.
De Nora on-site generation systems feature market innovations including enhanced efficiency, remote monitoring, and simple installation and maintenance. At the heart of every De Nora electro-chlorination system is the DSA electrode technology pioneered by De Nora.
The third generation of De Nora ClorTec on-site sodium hypochlorite generator uses an optimised electro-chlorination process that delivers a 15% operating cost saving over the previous system.
The ClorTec 2250 unit at Johor River Water Works is expected to be operational by March 2023.