Water & Wastewater Asia Nov/Dec 2018

Makoto Okura, representative managing director, electrode technologies business, De Nora Water & Wastewater Asia • November / December 2018 16 | IN PERSON Having recently sealed the deal to supply 10 water disinfection as well as oxidation, filtration and electrochlorination solutions for 10 water treatment plants in Hong Kong S.A.R., De Nora proves its ability to deliver innovative solutions to its clients worldwide. Q: Is this the first time Hong Kong is adopting De Nora’s water disinfection systems using on-site chlorine generation technology? MO: We have been supplying solutions for 30 years in Hong Kong, but this is the first time for our CECHLO on-site chlorine generation (OSCG) technology. Since the 1980s, we have been supplying our own electrochemical technologies in Hong Kong, not only for power stations but also for drinking water, pumping stations, wastewater and public pools. Q: What other countries have adopted this technology thus far? MO: Four locations in Japan, as well as North Africa, and Nigeria. Some of these countries like Africa adopt this technology as they do not have the infrastructure for a chlorination plant. For the project in Nigeria, we worked with GE Water Process Technologies as EPC Contractor. WATTCCON, which is the end user located in Kaduna, Nigeria, established a new plant manufacturing 40,000 litres per day of Sodium Hypochlorite at 15 per cent strength with GE Water & Process Technologies USA and De Nora. They said that the project is the pioneer Sodium Hypochlorite plant in West Africa, using the friendliest process in terms of Health, Safety and Environmental impact. This CECHLO on- site hypo generation plant shows the typical trend towards elimination of potential risk of transporting and storing hazardous chlorine gas even in Africa. Q: How has the CECHLO system evolved from 10 years ago in terms of power efficiency, generation capacity and cost? MO: We have been developing the CECHLO technology for decades, obtaining substantial advancement in performances, accounted as power consumption. Since its introduction, power consumption was reduced to less than 50 per cent despite doubling the capacity output. Q: Compared to traditional usage of chlorine in the water industry, what is the uptake rate of alternative disinfection technologies globally and in Asia? MO: Demand has been growing in the region. However in most Asian countries such as Indonesia and other developing nations, industries face less stringent regulatory frameworks with regards to wastewater recovery, and so there are little incentives for industrial players to pursue advanced solutions and integrate the environment as a factor in their decision on new technology adoption. However, it is encouraging that in recent years, with developments in environmental activismand regulatory stringency in Asia, companies are increasingly more incentivised to raise standards in their industrial processes, which allows for and even promotes innovation. Delving into De Nora’s water disinfection systems WWA speaks to Makoto Okura, representative managing director, electrode technologies business, to take a deeper look into De Nora’s CECHLO ® - On-site Chlorine Generation (OSCG) technology and future plans for the business.