The Tô Lịch River is 14 km long, starting from Nghĩa Đô Ward (Cầu Giấy District) and flowing out to the Nhuệ River at Hữu Hòa Commune (Thanh Trì District). It is estimated that the Tô Lịch River receives more than 150,000 m³ of industrial and household wastewater daily from over 300 large and small wastewater outlets.
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Receiving the majority of untreated wastewater from the Đống Đa, Cầu Giấy, Thanh Xuân, and Ba Đình districts... has caused the pollution of this river to become increasingly severe. The entire 14 km long river has turned into a floating sewer, stagnant with sewage that emits a foul odor all year round.
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To address the above situation, since the early 2000s, the Tô Lịch River has undergone many experimental cleaning methods from both international and domestic organizations. With each proposed measure, Hanoi has always hoped to revive this river.
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Hanoi has implemented revival plans for the Tô Lịch River three times, such as taking water from West Lake to wash the river, testing cleaning with Redoxy-3C to eliminate water pollution, or using Japanese technology for sludge decomposition without dredging.
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In fact, the results of pollution treatment using Japanese technology show that the types of gas causing foul odors have also significantly decreased; at some points where treatment machines were installed, the thickness of sludge has reduced from 15-20 cm.
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However, all three aforementioned plans have not reached their goal. Therefore, to this day, Hanoi Water Drainage Company still applies the "traditional" treatment method for the Tô Lịch River, which is using the manpower of hundreds of workers and rudimentary machinery to dredge the sludge and waste on the river.
(*) Source: VietNamNet
View attachment 1429
Receiving the majority of untreated wastewater from the Đống Đa, Cầu Giấy, Thanh Xuân, and Ba Đình districts... has caused the pollution of this river to become increasingly severe. The entire 14 km long river has turned into a floating sewer, stagnant with sewage that emits a foul odor all year round.
View attachment 1430
To address the above situation, since the early 2000s, the Tô Lịch River has undergone many experimental cleaning methods from both international and domestic organizations. With each proposed measure, Hanoi has always hoped to revive this river.
View attachment 1431
Hanoi has implemented revival plans for the Tô Lịch River three times, such as taking water from West Lake to wash the river, testing cleaning with Redoxy-3C to eliminate water pollution, or using Japanese technology for sludge decomposition without dredging.
View attachment 1432
In fact, the results of pollution treatment using Japanese technology show that the types of gas causing foul odors have also significantly decreased; at some points where treatment machines were installed, the thickness of sludge has reduced from 15-20 cm.
View attachment 1433
However, all three aforementioned plans have not reached their goal. Therefore, to this day, Hanoi Water Drainage Company still applies the "traditional" treatment method for the Tô Lịch River, which is using the manpower of hundreds of workers and rudimentary machinery to dredge the sludge and waste on the river.
(*) Source: VietNamNet