Nitrogen and Phosphorous Removal in Municipal Wastewater Treatment Plants in China: A Review

Table 4

Typical processes applied in municipal WWTPs and their performances in 2006.

Group	Process	WWTPs	From^m	Capacity	Removal by WWTP, %^n
				10^4 m^3/d	COD	NH3–N	TN	TP
AAO	r-AAO^a	Gaobeidian in Beijing	1993	100	90	90	50	20
	AAO	Xiaohongmen in Beijing	2005	60	90	90	60	60
	AO	Jizhuangzi in Tianjin	2005	54	90	70	55	90
	A-AAO^b	Tangjiatuo in Chonging	2006	30	85	85	60	50
	VIP^c	Licunhe in Qingdao	1998	8	95	90		80
SBR	CAST^d	Zhengrun in Zhenjiang	2003	10	80	20	10	90
	DAT-IAT^e	Diyi in Benxi	2004	23	70	80	50	70
	UNITANK^f	Chengbei in Nanjing	2003	30	80	75	55	80
	ICEAS^g	Disan in Kunming	1997	15	80	80	40	55
OD	Orbal	Chengbei in Wuxi	2001	10	90	90		90
	Carrousel	Yangli in Fuzhou	2003	20	85	90	40	55
	T-OD^h	Luofang in Shenzhen	2001	25	90	85		60
	DE-OD^i	Beishiqiao in Xi’an	1998	15	95	90	70	90
	A+OD^j	Dongjiang in Dongguan	2002	20	90	90		50
Biofilm	BAF^k	Xiannvhe in Shenyang	2003	40	85	35		85
	BioLak^l	Binzhoushi in Shandong	2002	10	80	70		50

^areverse AAO; ^bAAO with preanoxic zone; ^cVIP process; ^dCyclic activated sludge technology; ^eUNITANK process; ^fDemand aeration tank-intermittent tank; ^gIntermittent cycle extended aeration; ^hTriple channel oxidation ditch; ⁱDual channel oxidation ditch; ^jAnaerobic zone before Carrousel oxidation ditch; ^kBiological aeration filter; ^lBioLak is a process developed by a German Company; ^mThe time of operation started; ⁿRemoval rates calculated approximately by values in 2006.