Treatment type	EU 12	EU 15
Secondary treatment	3.8840325	2.917562951
Secondary+other treatment		3.929648571
N removal	4.244006987	2.504732165
N removal+other treatment		3.58373956
P removal		2.020645074
P removal+other treatment		3.152397339
NP removal	3.011298687	1.878784048
NP removal+other treatment	0.529868333	1.954130997