Hanoi
Japanese technology initially improves Hanoi’s polluted river
Adviser of the Japan Environmental Trade Organization Kubo Jun hoped that after two months of piloting the Nano – Bioreactor technology, the To Lich river’s water will be clear, without bad smell and settled sledge.
The pilot project to clean the To Lich river in Hanoi with Japan’s Nano - Bioreactor technology initially improves the polluted river, Minister of Natural Resources and Environment Tran Hong Ha said in an interview with Voice of Vietnam.
However, the minister said that it is early to decide if the technology can be applied in practice or not. There will be three indicators to be evaluated, including technology, improved environment and implementation costs, Ha added.
“I think that the assessment needs to go with the crucial phase of controlling and treating at the river's source. Currently, Japanese experts have only tested on one section of the To Lich river. Therefore, we must control and treat the river from its source, not turn the river into a tank of transporting wastewater,” Ha stressed.
Results for the first rehabilitation phase of the dying river, which was made public on June 6, showed that the thickness of mud in the river bed decreased by 20cm after three weeks of treatment with the Nano – Bioreactor technology, local media reported.
According to Nhat Viet Environmental Improvement Joint Stock Company, many pollution indicators have shown signs of improvement.
Specifically, at the point of 50m away from Hoang Quoc Viet bridge, the river’s mud thickness reduced from 91.3cm before May 15 to 72cm on May 31. At the points of 110m and 210m away from Hoang Quoc Viet bridge, the indicators are 96.7cm and 76cm; 87.7cm and 79cm, respectively.
Adviser of the Japan Environmental Trade Organization Kubo Jun, who himself waded into the To Lich river to check the water smell and mud thickness after being treated, said that the river’s mud thickness reduced and bad smell significantly dispelled and matched the expected indicators.
Meanwhile, in the To Lich river’s sections without Nano machine, the water was still smelly and the sludge remains viscous due to large content of organic waste, Kubo Jun added.
He stressed this result is positive and hoped that after two months of piloting the Nano – Bioreactor technology, the river’s water will be clear, without bad smell and settled sledge.
The To Lich river clean up project using Japanese bio-nanotechnology equipment was launched in Hanoi on May 16.
The technology includes nanotechnology aeration using natural substances which the Japanese side has surveyed for two years before piloting it. The nano aeration system uses a specially-designed filter technology to extract air directly from the environment and then diffuse into the water in the form of nano-sized air bubbles.
The diffusion of nano-sized air bubbles in the water increases the dissolved oxygen content in the treated water area, including groundwater. As a result, aerobic microorganisms will be activated and natural metabolic processes will be nourished, the final nutrition chain will be improved. Recovering the nutrient chain will improve the water quality in a short time.
However, the minister said that it is early to decide if the technology can be applied in practice or not. There will be three indicators to be evaluated, including technology, improved environment and implementation costs, Ha added.
Japan's environmental expert measures mud in the To Lich river. Photo: Phuong Duy
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Results for the first rehabilitation phase of the dying river, which was made public on June 6, showed that the thickness of mud in the river bed decreased by 20cm after three weeks of treatment with the Nano – Bioreactor technology, local media reported.
According to Nhat Viet Environmental Improvement Joint Stock Company, many pollution indicators have shown signs of improvement.
Specifically, at the point of 50m away from Hoang Quoc Viet bridge, the river’s mud thickness reduced from 91.3cm before May 15 to 72cm on May 31. At the points of 110m and 210m away from Hoang Quoc Viet bridge, the indicators are 96.7cm and 76cm; 87.7cm and 79cm, respectively.
Adviser of the Japan Environmental Trade Organization Kubo Jun, who himself waded into the To Lich river to check the water smell and mud thickness after being treated, said that the river’s mud thickness reduced and bad smell significantly dispelled and matched the expected indicators.
Meanwhile, in the To Lich river’s sections without Nano machine, the water was still smelly and the sludge remains viscous due to large content of organic waste, Kubo Jun added.
He stressed this result is positive and hoped that after two months of piloting the Nano – Bioreactor technology, the river’s water will be clear, without bad smell and settled sledge.
The To Lich river clean up project using Japanese bio-nanotechnology equipment was launched in Hanoi on May 16.
The technology includes nanotechnology aeration using natural substances which the Japanese side has surveyed for two years before piloting it. The nano aeration system uses a specially-designed filter technology to extract air directly from the environment and then diffuse into the water in the form of nano-sized air bubbles.
The diffusion of nano-sized air bubbles in the water increases the dissolved oxygen content in the treated water area, including groundwater. As a result, aerobic microorganisms will be activated and natural metabolic processes will be nourished, the final nutrition chain will be improved. Recovering the nutrient chain will improve the water quality in a short time.
