Analysis of domestic wastewater
What is domestic wastewater?

Domestic wastewater is water discharged from human activities such as eating, bathing, personal hygiene.

Water sources receiving wastewater are surface water sources or coastal seawater, with defined uses, where domestic wastewater discharges into.

According to the provisions of the law on environmental protection, the National Technical Regulation QCVN 14: 2008 / BTNMT is the standard that stipulates the maximum allowable value of pollution parameters in domestic wastewater when discharged into the environment. . And this regulation is applied to public facilities, barracks of armed forces, service establishments, apartment buildings and residential areas, enterprises discharging domestic wastewater into the environment. The value of pollution parameters (composition of domestic wastewater) as a basis for calculating the maximum value allowed in domestic wastewater is prescribed in the following table:

1pH5 – 95 – 9
2BOD5 (200C)mg/l3050
3Tổng chất rắn lơ lửng (TSS)mg/l50100
4Tổng chất rắn hòa tanmg/l5001000
5Sunfua (tính theo H2S)mg/l14
6Amoni (tính theo N)mg/l510
7Nitrat (NO3–) (tính theo N)mg/l3050
8Dầu mỡ động, thực vậtmg/l1020
9Tổng các chất hoạt động bề mặtmg/l510
10Phosphat (PO43-) (tính theo P)mg/l610
11Tổng ColiformsMPN/ 100ml35

There are 11 typical parameters of domestic wastewater, among them

Column A defines the value of pollution parameters as a basis for calculating the maximum value allowed in domestic wastewater when discharged into water sources used for domestic water supply purposes.

Column B specifies the value of pollution parameters as a basis for calculating the maximum value allowed in domestic wastewater when discharging into water sources not used for domestic water supply purposes.

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