Application of an Anaerobic–Anoxic–Oxic–Oxic (AAO/O) Model to the Treatment of Real Domestic Wastewater

Table 1

The influent range of pollution parameters and their limitation values according to Vietnamese environmental standards.

No.	Pollution parameters	Unit	Influent range of pollution parameters	Limitation values of pollution parameters according to Vietnamese environmental standards^a
1	pH	—	5.5–7.1	6–9
2	COD	mg·L^−1	42.9–280.2	75
3	BOD5	mg·L^−1	25.7–168.2	30
4	TSS	mg·L^−1	16.4–146.0	50
5	TN	mg·L^−1	29.1–94.1	30
6	TP	mg·L^−1	13.8–57.2	6

^aThe national technical regulation on domestic wastewater (QCVN 14 : 2015/MT-BTNMT) discharging into the water sources serving the tap water supply.