Water of the To Lich River has become cleaner after being treated with Japanese technology (Photo: VNA)Hanoi (VNS/VNA) - The noxious odour and level of mud in the To Lich Riverand West Lake in Hanoi have decreased dramatically since nano-bioreactortechnology has been applied, according to a representative of the JapanEnvironment and Trade Promotion Organisation (JETRO).
The mudon the riverbed has fallen from 91.3cm to 15cm. In West Lake, the level reachedzero, said JETRO President Tadashi Yamamura.
Thequality of water where Koi fish have been released has met all 36 Vietnamesestandards.
The badodour from the To Lich River and West Lake had also decreasedsignificantly.
Ministerof Natural Resources and Environment Tran Hong Ha and the ministry’s experts onOctober 30 visited West Lake to inspect the results of the Japanese watertreatment technology.
Theminister said the Japanese technology is good because it can treat mud in theponds and lakes without having to dredge them. The ministry is consideringadapting the technology for Vietnamese wastewater, as well as finance for theproject.
“If thetechnology meets the criteria, the ministry will consider applying it widely inVietnam,” he said.
TadashiYamamura said if the technology is widely applied in Vietnam, the country willonly need to invest in the initial costs. The technology itself will then dothe work. It is not costly, because it does not require added chemicals, justwater and electricity.
Themunicipal People’s Committee and relevant agencies are assessing the efficiencyof the trial project in order to decide whether to apply it widely or not.
In May,the Japanese nano-bioreactor technology was applied to a section of Hanoi’spolluted To Lich River and West Lake – the city’s largest lake.
Thedevice creates and diffuses nano-gas streams into the surrounding water tostimulate microorganisms, which helps to release oxygenand decompose the mud in the riverbed, making the watercleaner.
InSeptember, Japanese carp, often called Koi, and Vietnamese carp were releasedinto the To Lich River and West Lake as a demonstration of how clean the wateris after a five-month trial of the Japanese technology./.
VNA
