Scientist 'went out' to clean up rivers and lakes

Simultaneously handling pollution of some rivers and lakes in Hanoi, scientists determined to implement the "revolution" environment.

According to the Decision of the Hanoi People's Committee, the treated water must meet the parameters of pH 5-9 mg / liter; dissolved oxygen (DO) is greater than or equal to 2mg / liter; COD amount of 50 mg / liter; BOD5 25mg / liter .

Dr. Nguyen Phu Tuan, Green Joint Stock Company, High-Tech Business Incubator, Hoa Lac High-Tech Park said: 'With these parameters, treatment of the lake can be done, but with the river it is almost' hitting '. quiz 'because currently there is no unit in Vietnam that has been working as a demonstration model for river pollution improvement. In addition, most of Hanoi's lakes are reservoirs, so the amount of daily waste water is often discharged into the lake. Lake water can run out of pollution after treatment but it will quickly return to pollution if it does not prevent wastewater '.

Blooming flowers

Up to now, there have been 7 registered units participating in the treatment of lake pollution. Among these, only Green Joint Stock Company used to spend its own money and technology to demonstrate the performance of Van Lake treatment. Thus, with the simultaneous handling of this time will be the 'hundred flowers blooming' with many different technologies.

Technicians conduct pollution treatment of Lake Van water.Photo: Bich Ngoc

Hanoi city also requires units to provide suitable testing procedures, which can be applied long term and effectively after the end of the trial period. According to Professor Tran Hieu Nhue, Institute of Water and Public Engineering technology, board member of the City's project selection: 'This is considered a test of scientists'.

Avoid 'skimming tops'

Another problem is the maintenance of the effectiveness of pollution treatment facilities. According to Dr. Tuan: 'If you can not solve the root, then it is just' skimming '. While the sources of waste discharge are still daily discharging pollutants, it is also necessary to take into account the creation of mini wastewater treatment plants to maintain the quality of treated rivers and lakes'.

Sharing the same concern, Mr. Tran Quoc Phong, Chairman of the Board of Directors of PQ Environmental Treatment Co., Ltd, registered to handle a section of the National Cinema Center area, extending until the Ditch Hao. Nam said that "the unit has also calculated that the waste sources will continue to be discharged after the water in the ditch has been treated. Although it is difficult, Mr. Phong believes that this test will be successful and an opportunity. for units to contribute to beautifying the city's rivers'.

However, according to Dr. Nguyen Viet Anh, Institute of Environmental Science and Engineering (University of Construction): 'Management agencies also need to look at the capacity of domestic units to issue papers, if not only is to tell. Instead of many 'tried' units can assign a unit that has dealt with lake pollution beforehand in order to save money from the State and businesses' costs.

A series of registration units handle lakes

PQ Environmental Treatment Co., Ltd in collaboration with Drainage Enterprise No. 4, apply for a pilot treatment at a section of ditches for daily life drainage of 480m long. This section of the canal starts from the National Cinema Center area, extending to the Hao Nam ditch.

Green Joint Stock Company and Hanoi One-member Water Sewerage Company Limited apply for treatment of surface water pollution of lakes Quynh, Cong Vien and Nghia Tan lakes; Also applying for treatment in Cong Vien lake, there is also Environmental Technology Company Limited, however, this company also would like to handle one more section of To Lich river.

Institute of Chemistry (Vietnam Academy of Science and Technology) will handle lakes: Van Chuong, Quan Nhan, Trung Hoa .; The Institute of Environmental Science and Engineering (University of Civil Engineering) would like to improve the water quality and enhance the self-cleaning ability of lakes in Bach Thao Park.