Renovating lake water with modern technology

A small vacuum will dive deep in the sediment of Sword Lake and suck from below. Sludge suction is carried out in each sub-region. After 2 years, the entire Sword Lake will be cleaned.

Lake sword (Photo: Vietsciences)

This technology of Lake Guom water improvement is considered by scientists to be the most suitable solution ever, both in science and Vietnamese spirit.

The author of this method is Professor Peter Wener, a German, working at the University of Dresden. He has been to Vietnam 20 times in many projects to help Vietnam treat the water environment. Capital loves Hanoi, every morning this professor walks 5 rounds around Sword Lake, from which the idea of ​​using modern technology to preserve the thousand-year-old waterlog is polluted and depleted every day. The idea has developed into a project evaluated by Vietnamese scientists as the most suitable and suitable scale ever related to the preservation of Sword Lake and turtle.

German and Vietnamese scientists have embarked on a preliminary study and survey of Sword Lake to plan the technology and study route. First, the German side used modern hydrological geological techniques to survey the mud layer structure of the lake, accurately assessing the volume and distribution of the mud layer to determine the process of removing the mud.

According to calculations by scientists, Ho Guom is expected to be divided into many sub-regions. It is possible to separate these sub-regions with an iron net. Grids from above shoot down, gradually open when touching the bottom to spread all aquatic species out of the net.

Instead of using a straight-down dredger, a small vacuum will dive deep into the sediment and suck from below. The mud then descends smoothly. Aquatic species will not be sucked out in the mud. All of these sludge are piped to the shore, which can be used as fertilizer or pressed into other places.

Sludge suction is only done in one sub-region, after 3 months, it will continue in another sub-region. Just like that for 2 years, the whole lake will be cleaned. Within those 3 months, water from the remaining sub-regions is balanced for the disturbed sub-region. 3 months is also a time for scientists to consider whether the lake ecosystem is adaptable or not.

During the smoking period, the Sword Lake Turtle will be given special care.

According to Dr. Bui Hoc, head of the Department of Ecology, Director of the Center for Geological Environment Research, the advantage of this method is that it is not necessary to drain the lake water and then dredge it, the bottom surface of the lake will be very little. be mixed, avoid water turbidity, limit the dissolution of toxic substances in the mud causing water pollution. Dividing the lake into small sub-areas for an appropriate period of time causes negligible disturbance to the lake's ecosystem.

Mr. Le Hung Anh, director of an environmental treatment company, commented: 'I have seen German people apply this technology to clean many of their ecological lakes very effectively. This is the most advanced water treatment technology in Germany today. "Mr. Hung Anh said that the dredger is intended to be used in Hoan Kiem Lake so it is very small so it does not cause noise, it is not noticeable. work with machines all day and night.

The Ministry of Science and Technology has proposed Hanoi City People's Committee to test the solution in a lake with characteristics similar to Sword Lake. The expected Three Specimens are selected for testing. German partner announced to sponsor Vietnam 1 million euros only for monitoring, research and testing.