TAILIEUCHUNG - Báo cáo " The wastewater quality from several industrial production branches and traditional production villages in the Day-Nhue river basin, North Vietnam "

The Day-Nhue river system, which locates in the important economic region of the northern plains, covers a natural surface of 7949 km². The pollution of the Day-Nhue river system was mainly due to receiving untreated/ ineffective untreated wastewater discharges from the different sources in the basin. This paper focused on the industrial wastewater sources. Our purposes are to i) collect information about the | VNU Journal of Science Earth Sciences 26 2010 1-7 The wastewater quality from several industrial production branches and traditional production villages in the Day-Nhue river basin North Vietnam Nghiem Xuan Anh1 Le Thi Phuong Quynh1 Vu Huu Hieu1 Luu Thi Nguyet Minh2 Duong Thi Thuy3 11nstitute of Natural Product Chemistry 18 Hoang Quoc Viet Cau Giay Hanoi institute of Chemistry 18 Hoang Quoc Viet Cau Giay Hanoi Institute of Environmental Technology 18 Hoang Quoc Viet Cau Giay Hanoi Received 5 July 2010 received in revised form 16 July 2010 Abstract. The Day-Nhue river system which locates in the important economic region of the northern plains covers a natural surface of 7949 km2. The pollution of the Day-Nhue river system was mainly due to receiving untreated ineffective untreated wastewater discharges from the different sources in the basin. This paper focused on the industrial wastewater sources. Our purposes are to i collect information about the number and sizes of industrial production factories and traditional production villages ii establish the database of wastewater quality released from six main industrial production branches in the basin. The results obtained from our investigation during 1 2007-12 2009 showed that the total wastewater discharge from industrial production factories and traditional production villages reached to 100 000 m3 day and 45 000-60 000 m3 day respectively. The wastewater quality of some industrial production branches exceeded the National technical regulation on industrial wastewater QCVN 24 2009 BTNMT. Most traditional production villages caused serious organic pollution. Keywords wastewater quality industrial production traditional production villages Day- Nhue River. 1. Introduction Recently in Vietnam the operation and function of many industrial zones in different cities and provinces where there were not efficient wastewater treatment systems have led to the serious water pollution. These point sources not only pollute the

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