A study of waste waterimpacts of main factories on water quality of To Lich river, HaNoi
Waste water from industrial sites amounts to one third of total waste water discharged into To Lich ri ver, and may have serious effects on the river water quality. With the total amount waste water of fact ories (Hanoi beer alcohol and beverage joint stock...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
VNU
2014
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| Subjects: | |
| Online Access: | http://repository.vnu.edu.vn/handle/11126/4603 |
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| Institution: | Vietnam National University, Hanoi |
| Language: | English |
| Summary: | Waste water from industrial sites amounts to one third of total waste water discharged
into To Lich ri ver, and may have serious effects on the river water quality. With the total amount
waste water of fact ories (Hanoi beer alcohol and beverage joint stock corporation (HABECO),
Trang An JSC and Thuong Dinh industrial park) of 45,000m
3
/day , these factories accounts for
more than a half of total industrial waste water released into To Lich ri ver. The analytic results of
water samples taken from To Li ch river show that the parameters of DO, COD, BOD5, TSS, NH4
+
,
NO2
-and coliform exceed the Vietnamese Standards (QCVN 08:2008, columnB2). However, the
concentrations of Fe and heavy metals (Zn, Cd, Cr, Cu, Mn), are lower than the Vietnamese
Standards (QCVN 08:2008, columnB2), except the concentration of ionPb, especially in the area
from Thuong Dinh Industrial Park to the last segment of the river. The analytic results of wast e
water from the main factories (HABECO, Trang An JSC and Thuong Dinh industrial park, Hanoi
Soap Joint Stock Company ( HASO); Saovang Joint-stock Rubber Company (SRC); Tool No. 1
Joint-stock Company (TJC)) show that, the parameters of TSS, BOD5, COD, total of nitrogen,
total of phosphorus are higher than the Vietnamese standards for Industrial waste water QCVN
24:2009/BTNMT (column B). I n particular, all waste water parameters of Trang An JSC are lower
than the Vietnamese Standard for Industrial waste water QCVN 24:2009/BTNMT (column B),
because the factory has an effective waste water treatment system. The heavy metals parameters of
waste water from all factories are lower than QCVN 24:2009/BTNMT. Estimated loads of
contaminants in waste water from the factories by load coefficient of IPC software show that
without treatment, HABECO can release 1974 tons of BOD, 766 tons of TSS, 8. 4 tons of
phosphorus and 52.5 tons of nitrogen annually; Trang An JSC can release 64.8 tons of BOD, 48. 6
tons of TSS, 0. 6 ton of phosphorus, 1.6 tons of nitrogen and 25 tons of oil and grease; HASO
releases 30 tons of BOD, 33 tons of TSS and 5 tons of oil and grease. Thus, if the waste water is
not treated, it can lead to a ver y seriously pollution for To Lich river |
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