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

Table 2

Designed specification of the AAO/O model.

No.	Designed specification	Unit	Threshold values	Designed values
1	Flow Q	L·day^−1	—	200–250
2	Food to microorganism ratio (F/M)	—	0.15–0.25	—
3	MLSS	mg·L^−1	3000–5000	—
4	Anaerobic retention time	h	0.5–1.5	1.0
5	Anoxic retention time	h	0.5–1.0	1.0
6	1^st oxic retention time	h	3.5–6.0	6.0
7	2^nd oxic retention time	h	3.5–6.0	6.0
8	Ozone processing time	h	—	0.1
9	Sludge circulation	m^3·day^−1	20–50	50
10	Inner circulation	m^3·day^−1	100–300	300