TAILIEUCHUNG - Báo cáo "Characteristic of urban wastewater in Hanoi City – nutritive value and potential risk in using for agriculture "

Reusing domestic wastewater for irrigation is a common practice in peri-urban areas in Vietnam. This study investigates the characteristic of domestic wastewater in Hanoi City in terms of nutritive value and potential risk in using for agriculture. The wastewater samples were collected in four main drainage rivers of the City including Lu, Set, Kim Nguu, and To Lich River during March to May 2010. We found that the wastewater of Hanoi City | VNU Journal of Science Earth Sciences 26 2010 42-47 Characteristic of urban wastewater in Hanoi City - nutritive value and potential risk in using for agriculture Chu Anh Dao1 3 Pham Manh Con2 3 Nguyen Manh Khai3 11nstitute of Industrial Chemistry Ministry of Industry and Trade of Vietnam 2 Tia Sang magazine Ministry of Science and Technology of Vietnam 3 Faculty of Environmental Sciences Hanoi University of Science VNU 334 Nguyen Trai Hanoi Vietnam Received 9 September 2010 received in revised form 11 October 2010 Abstract. Reusing domestic wastewater for irrigation is a common practice in peri-urban areas in Vietnam. This study investigates the characteristic of domestic wastewater in Hanoi City in terms of nutritive value and potential risk in using for agriculture. The wastewater samples were collected in four main drainage rivers of the City including Lu Set Kim Nguu and To Lich River during March to May 2010. We found that the wastewater of Hanoi City is seriously polluted by organic matters. The nutrient parameters were really high and which is suitable for agricultural irrigation. The wastewater might supply enough nutrients for plant growing. However municipal wastewater contains a variety of inorganic substances from domestic and industrial sources including a number of potentially toxic elements such as Ltg Cd L-1 mg Cu L-1 Ltg Pb L mg Zn L-1 and mg Mn L-1. These were also a significant quantities of heavy metals being higher than natural river water and possible threat to soil biota and hence on microbial and faunal activity and then human health. Keywords heavy metals irrigation trace metals treatment wastewater. 1. Introduction Wastewater is sewage storm-water and water that has been used for various purposes around the community. Unless properly treated wastewater can harm public health and the environment. Urban wastewater pollution sources are very variables depending on the levels of development .

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