The Hoa Lien water treatment plant is the largest plant in the city of Da Nang on the east coast of Vietnam. The daily water capacity will be expanded to 120,000 m3 with the possibility of further expansion to 240,000 m3 due to the growth in tourism, production and population.
Hopefully, the project will also help prevent contamination of the local environment: Rivers, especially in the southern area of the city, are vulnerable to salt contamination in the dry season. The discharge of untreated domestic and industrial wastewater as well as careless disposal of garbage by residents along the rivers are two other reasons for river and lake water contamination. As a result, old facilities have been forced to stop operation, leading to water shortage in the area. Therefore, the Hoa Lien plant pumps river water from other areas along the river, which are not salty, to treat and supply to the residents.
First stage of the expansion
The expansion of the plant will be carried out in two stages. The first stage was to establish a spillway on the Cu De River to source water. A big raw water pumping station (727m2) was built and a 10.6 km long water pipeline in DN1400 was installed underground, running from the pumping station in Hoa Bac to the Hoa Lien water treatment plant.
Drinking water certifications were essential
AVK Vietnam and Hawaco Central, a local technical consultancy company in Da Nang, teamed up for the project. With the support of other companies in the AVK Group, such as AVK International A/S, AVK Polska, Wouter Witzel Eurovalve and AC.MO S.r.l., AVK Vietnam and Hawaco have put together an ideal solution for the project. Our valves can ensure durability in coastal climates and potential saline water sources, while meeting the strict technical specifications of the facility.
An important factor in the product evaluation process turned out to be our valves’ many certifications for drinking water by independent international organisations such as WRAS, DVGW and KIWA. AVK International has delivered flanged resilient gate valves, series 06/30, from DN100 to DN400 and double orifice air relief valves, series 851, from DN100 to DN200.
